JP7021763B2 - Slab construction method - Google Patents

Description

The present invention relates to a slab construction method for constructing a concrete slab having a predetermined area on a predetermined floor of a building.

It is formed of a steel plate base of a predetermined area that has been plated and a plurality of reinforcing bar trusses installed on the upper surface of the steel plate base. A deck plate with a reinforcing bar truss used for slab construction is disclosed (see Patent Document 1). The reinforcing bar truss is located between the upper end bar extending vertically away from the upper surface of the iron plate base, the lower end bar extending vertically between the iron plate base and the upper end bar, and the iron plate base and the upper end bar. It is formed from lattice streaks that extend in the vertical direction while repeating twists and turns in the vertical direction. In this reinforcing bar structural material, the upper convex portion of the lattice bar is spot welded to the upper end bar in a state of being in contact with the upper end bar, and the middle portion of the lattice bar is spot welded to the lower end bar in a state of being in contact with the lower end bar. .. Further, the bent portion of the lower concave portion of the lattice muscle bent outward in the width direction so as to be parallel to the iron plate base is spot welded to the upper surface of the iron plate base.

Japanese Unexamined Patent Publication No. 2007-170161

When a concrete slab is constructed between beams facing each other using a deck plate with a reinforcing bar truss disclosed in Patent Document 1, a plurality of deck plates with a reinforcing bar truss are connected to form a deck plate unit, and the deck plate unit is formed. Is installed in the construction space of the concrete slab between the beams, and concrete is placed on the upper surface of the iron plate base to cure the concrete for a predetermined period. Concrete slabs are constructed from deck plates with rebar trusses and hardened concrete. When the area of the concrete slab construction space is large and a PC beam with PC steel attached is used as the beam, the direction of the PC beam and the PC steel of the PC beam is the same in order to secure the strength of the concrete slab to be constructed. It is necessary to construct a PC beam integrated structure from a plurality of reinforcing bars extending to the end of a deck plate with a reinforcing bar truss and hardened concrete.

An object of the present invention is to provide a slab construction method capable of constructing a concrete slab in a construction space between PC beams of a building and at the same time constructing a beam integrated structure for reinforcing the concrete slab. .. Another object of the present invention is to secure the strength of a concrete slab having a large area constructed between PC beams by constructing a beam integrated structure, and concrete having sufficient strength between PC beams. The purpose is to provide a slab construction method capable of making a slab.

The premise of the present invention for solving the above-mentioned problems is a slab construction method in which a concrete slab having a predetermined area is constructed on a predetermined floor of a building.

The first feature of the present invention in the above premise is that the slab construction method is a hierarchy in which a plurality of deck plates with reinforced truss used for concrete slab construction are connected in one direction in a work space on the ground to construct a concrete slab. A unit creation process that creates a deck plate unit with a predetermined area corresponding to the construction space, and a deck plate with reinforced truss that forms a bilateral region excluding the residual area between the bilateral regions of the deck plate unit in the work space on the ground. While arranging a plurality of reinforcing bars extending in one direction at both ends of the concrete in a state of being separated by a predetermined dimension in the crossing direction, the reinforcing bars are placed at the upper ends of the reinforcing bars located at both ends of the deck plate with the reinforcing bars. The reinforcing reinforcing bar connecting process that connects the concrete slab to the lower end bar and the deck plate unit to which the reinforcing reinforcing bars are connected to the reinforcing bar truss are carried into the layer where the concrete slab of the building is constructed by a predetermined lifting means. While arranging the deck plate unit in the construction space between the PC beams facing one direction of the building and the crossing direction, the beam surface of the PC beam is connected to both ends of the deck plate with the reinforced truss by a predetermined connecting means. A unit installation process in which multiple slab reinforcing bars extending in one direction are placed on the upper end bars of the reinforced concrete in a state where they are installed in the vicinity and separated by a predetermined dimension in the crossing direction on almost the entire surface of the deck plate unit. By placing concrete on the upper surface of the deck plate unit with a predetermined covering size and curing the concrete for a predetermined period, a concrete slab is constructed in the construction space between the PC beams facing each other in the crossing direction, and the concrete slab is constructed with the PC beam. With reinforced truss that forms both sides of the deck plate unit A beam-integrated structure formed from concrete and reinforced reinforcing bars placed on both ends of the deck plate excluding the residual area and integrated with the PC beam. It is to have a beam-integrated structure construction process to construct.

The second feature of the present invention in the above premise is that the slab construction method is a hierarchy in which a plurality of deck plates with reinforced truss used for concrete slab construction are connected in one direction in a work space on the ground to construct a concrete slab. One side area and the other side of the first deck plate unit in the unit creation process of making the first to nth deck plate units of a predetermined area corresponding to the first to nth construction spaces and the work space on the ground. Multiple first reinforcing bars extending in one direction intersect at one end of the deck plate with those reinforcing bars forming one side zone excluding the residual zone between the regions and the other side zone. While arranging them apart by a predetermined dimension, the first reinforcing bars are connected to the middle height position between the upper and lower bars of the reinforcing bars located at one end of the deck plate with the reinforcing bars. The other end of the deck plate with reinforced truss forming the other lateral region excluding the residual region between the other lateral region and one lateral region of the nth deck plate unit and one lateral region. A plurality of second reinforcing bars extending in one direction are arranged in a state of being separated by a predetermined dimension in the crossing direction, and the second reinforcing bars are placed at the other end of the deck plate with the reinforcing bar truss. Each deck plate including a reinforcing bar connecting step connecting at an intermediate height position between the upper end bar and the lower end bar of the truss and the first and nth deck plate units in which the first and second reinforcing bars are connected to the reinforcing bar. The unit is carried into the floor where the concrete slab of the building is to be constructed by a predetermined lifting means, and the first to nth construction spaces between the PC beams facing the crossing direction intersecting with one direction of the building are first to the first. While arranging the n-deck plate units adjacent to each other in the crossing direction, the vicinity of both ends of the deck plate with the reinforced truss is installed near the beam surface of the PC beam by a predetermined connecting means , and the deck plate unit is almost entirely covered. , A unit installation process in which a plurality of slab reinforcing bars extending in one direction are arranged on the upper end bars of the reinforcing bar truss in a state of being separated by a predetermined dimension in the crossing direction, and predetermined on the upper surface of the first to nth deck plate units. By placing concrete with the covering size of No. 1 and curing the concrete for a predetermined period, a concrete slab is constructed in the 1st to nth construction spaces between the PC beams facing each other in the crossing direction, and one PC beam and the first one. 1 Deck plate of a deck plate with a reinforced truss that forms one side of the unit While constructing a beam integrated structure integrated with a PC beam formed of concrete and a first reinforcing reinforcing bar arranged in one side area excluding one end, a residual area and the other side area. Arranged in the other end and residual area of the deck plate with reinforced truss forming the other lateral area of the other PC beam and the nth deck plate unit and in the other lateral area excluding one lateral area. It is to have a beam integrated structure construction step for constructing a beam integrated structure formed from a second reinforcing reinforcing bar and the concrete and integrated with a PC beam.

As an example of the present invention having the first and second features, in the reinforcing bar connecting step, a deck plate with a reinforcing bar truss extending between a beam surface of a PC beam and a portion separated by a predetermined dimension in the crossing direction from the beam surface. Connect these reinforcing bars to the reinforcing bars.

As another example of the present invention having the first and second features, in the reinforcing bar connecting step, the reinforcing bars are connected to the reinforcing bar truss of the deck plate with the reinforcing bar truss in a state of being substantially equally spaced in the crossing direction. , The reinforcing bars are arranged at approximately equal intervals in the crossing direction.

As another example of the present invention having the first and second features, in the reinforcing bar connecting step, a deck plate with a reinforcing bar truss is provided with a lifting bar that is separated from the reinforcing bars in an intersecting direction and extends in one direction. In the lifting means, the deck plate unit is lifted by using the lifting bar, and the deck plate unit is carried into the layer where the concrete slab of the building is constructed.

As another example of the present invention having the first and second features, the slab construction method faces both ends of the reinforcing reinforcing bars in one direction after the unit installation step or at the same time as the unit installation step. It includes an end connection step of connecting to an anchor bolt or reinforcing bar extending from a PC beam.

As another example of the present invention having the first and second features, a deck plate with a reinforcing bar truss has a predetermined area steel plate base having both end edges extending in one direction and both side edges extending in an intersecting direction. Then, between the upper end bar where the reinforcing bar truss extends upward from the steel plate base and extends in the crossing direction, the lower end bar which is located between the steel plate base and the upper end bar and extends in the crossing direction, and the steel plate base and the upper end bar. It is formed from lattice bars that extend in the crossing direction while repeatedly bending in the vertical direction, the lower part of the lattice bars is welded and fixed to the iron plate base, and those reinforcing bars that are lined up at a predetermined dimension apart in the cross direction are the upper end bars. And the reinforcing bars that are connected to one of the lower end bars and the lattice bars and are lined up at a predetermined dimension in the vertical direction, are connected to at least the lower end bars and the lattice bars of the upper end bars, the lower end bars and the lattice bars. Be concatenated.

According to the slab construction method of the present invention having the first feature, a plurality of deck plates with reinforced truss used for concrete slab construction are connected in one direction in a work space on the ground, and construction of a hierarchy for concrete slab construction. Create a deck plate unit with a predetermined area corresponding to the space, and place multiple reinforcing reinforcements extending in one direction at both ends of the deck plate with those reinforcing bars that form both sides of the deck plate unit in the work space on the ground. At the same time, the reinforcing reinforcing bars are connected to the reinforcing bar trusses located at both ends of the deck plate with the reinforcing reinforcing bars, and the deck plate unit to which the reinforcing reinforcing bars are connected to the reinforcing bars is connected to the concrete slab by a predetermined lifting means. While carrying in and arranging the deck plate units in the construction space between the PC beams facing each other in the crossing direction, both neighboring parts of the deck plates with reinforced truss are installed near the beam surface of the PC beams by a predetermined connecting means. Concrete is placed on the upper surface of the deck plate unit with a predetermined covering size, a concrete slab is constructed in the construction space between the PC beams facing each other in the crossing direction, and both sides of the PC beam and the deck plate unit are formed. Since a beam-integrated structure formed from both ends of a deck plate with a reinforced truss, reinforcing reinforcing bars, and concrete and integrated with a PC beam is constructed, when a concrete slab is installed in the construction space between the PC beams of the building, At the same time, a beam-integrated structure for reinforcing the concrete slab (formed from both ends of the deck plate with a reinforced truss forming both sides of the PC beam and the deck plate unit, the reinforcing reinforcement and concrete, and integrated with the PC beam. It is possible to construct a concrete beam structure). The slab construction method is to construct a beam-integrated structure integrated with a PC beam by constructing a beam-integrated structure at the same time as a concrete slab, and to create a beam-integrated structure integrated with a PC beam. Therefore, it is possible to secure the strength of a concrete slab with a large area (large span) constructed between the PC beams, and to make a concrete slab with sufficient strength to connect to the beam integrated structure between the PC beams. can.

According to the slab construction method of the present invention having the second feature, a plurality of deck plates with reinforced truss used for concrete slab construction are connected in one direction in a work space on the ground to construct a concrete slab. Deck plates with reinforced truss that form the one side area of the first deck plate unit in the work space on the ground by making the first to n deck plate units of a predetermined area corresponding to the 1st to nth construction spaces. While arranging a plurality of first reinforcing bars extending in one direction at one end, the first reinforcing bars are connected to the reinforcing bar truss located at one end of the deck plate with the reinforcing bar truss, and the nth deck plate is used. While placing multiple second reinforcing bars extending in one direction at the other end of the deck plate with those reinforcing bars forming the other lateral region of the unit, the second reinforcing bars are placed on the deck plate with those reinforcing bars. Each deck plate unit including the 1st and nth deck plate units connected to the reinforcing bar truss located at the other end and the 1st and 2nd reinforcing reinforcing bars connected to the reinforcing bar is concrete slab by a predetermined lifting means. The first to nth deck plate units are placed adjacent to the first to nth construction spaces between the PC beams facing each other in the crossing direction, and the first to nth deck plate units are placed adjacent to each other in the crossing direction. The vicinity of both ends of the deck plate is installed near the beam surface of the PC beam by a predetermined connecting means, concrete is poured on the upper surface of the first to nth deck plate units with a predetermined covering size, and the PC beams facing each other in the crossing direction. A concrete slab is constructed in the 1st to nth construction spaces between the two, and one end of the deck plate with a reinforced truss and the first deck plate forming one side area of one PC beam and the first deck plate unit. A deck plate with a reinforced truss that forms the other side area of the other PC beam and the nth deck plate unit while constructing a beam-integrated structure formed of reinforced reinforcement and concrete and integrated with the PC beam. Since a beam-integrated structure formed from the other end, the second reinforcing reinforcing bar, and concrete and integrated with the PC beam is constructed, the concrete slab is installed in the construction space between the PC beams of the building at the same time. Beam-integrated structure for reinforcing concrete slabs (one end of deck plate with reinforced truss forming one side area of one PC beam and one side of the first deck plate unit, first reinforcing reinforcement and concrete A beam-integrated structure formed from and integrated with a PC beam, the other end of a deck plate with a reinforcing bar truss that forms the other lateral region of the other PC beam and the nth deck plate unit, and a second reinforcement. It is possible to construct a beam-integrated structure formed from reinforcing bars and concrete and integrated with a PC beam). As for the slab construction method, by constructing the beam-integrated structure at the same time as the concrete slab, it is possible to make the beam-integrated structure integrated with the PC beam, and the beam-integrated structure integrated with the PC beam can be constructed. By making it, it is possible to secure the strength of the concrete slab with a large area (large span) constructed between the PC beams, and make a concrete slab with sufficient strength to connect to the beam integrated structure between the PC beams. be able to.

In the slab construction method, in the reinforcing reinforcing bar connecting step, the reinforcing reinforcing bars are connected to the reinforcing bar truss of the deck plate with the reinforcing bar truss in a state where the reinforcing reinforcing bars are separated by a predetermined dimension at least in the crossing direction and the vertical direction, and the reinforcing reinforcing bars are crossed. By arranging the beams at least in the crossing direction of the direction and the vertical direction with a predetermined dimension apart, the concrete slab is installed in the construction space between the PC beams of the building, and at the same time, the beam integrated structure for reinforcing the concrete slab (crossing). It is possible to construct a beam-integrated structure including reinforcing bars that are lined up at least in the crossing direction at least in the direction and the vertical direction, and the reinforcements are lined up in the crossing direction at least in the crossing direction. By constructing a beam-integrated structure including reinforcing bars, a beam-integrated structure integrated with a PC beam can be created, and by creating a beam-integrated structure integrated with a PC beam, between PC beams. It is possible to secure the strength of the concrete slab with a large area (large span) constructed in the above, and it is possible to make a concrete slab having sufficient strength to connect to the beam integrated structure between the PC beams.

In the reinforcing reinforcing bar connecting step, a slab construction method for connecting the reinforcing reinforcing bars to the reinforcing bar truss of a deck plate with a reinforcing bar truss extending between the beam surface of the PC beam and a portion separated by a predetermined dimension in the crossing direction from the beam surface is constructed. At the same time as constructing a concrete slab in the construction space between the PC beams of an object, a beam integrated structure for reinforcing the concrete slab (between the beam surface of the PC beam and a location separated by a predetermined dimension in the crossing direction from the beam surface). It is possible to construct a beam-integrated structure including those reinforcing reinforcing bars connected to the reinforcing bars of the deck plate with the extending reinforcing bars), and it is located between the beam surface and the location separated by a predetermined dimension in the crossing direction from the beam surface. By constructing a beam-integrated structure including those reinforcing reinforcing bars connected to a reinforced truss, it is possible to make a beam-integrated structure integrated with a PC beam, and a beam-integrated structure integrated with a PC beam can be created. By making it, it is possible to secure the strength of the concrete slab with a large area (large span) constructed between the PC beams, and make a concrete slab with sufficient strength to connect to the beam integrated structure between the PC beams. be able to.

In the reinforcing reinforcing bar connecting step, a slab construction method in which the reinforcing reinforcing bars are connected to the reinforcing bar truss of a deck plate with a reinforcing bar truss in a state of being substantially evenly spaced in the crossing direction, and the reinforcing reinforcing bars are arranged at substantially the same spacing in the crossing direction. Is a beam integrated structure for reinforcing the concrete slab at the same time as constructing a concrete slab in the construction space between the PC beams of the building (a beam integrated structure including reinforcing reinforcing bars arranged at approximately equal intervals in the crossing direction). ) Can be constructed, and by constructing a beam-integrated structure including reinforcing reinforcing bars arranged at approximately equal intervals in the crossing direction, a beam-integrated structure integrated with the PC beam can be constructed. By making a beam-integrated structure integrated with the beam, it is possible to secure the strength of the concrete slab with a large area (large span) constructed between the PC beams, and the beam-integrated structure between the PC beams. It is possible to make a concrete slab with sufficient strength that leads to.

In the reinforcing reinforcing bar connecting step, the lifting bars that are separated from the reinforcing reinforcing bars in the crossing direction and extend in one direction are connected to the reinforcing bar truss of the deck plate with the reinforcing bar truss, and the lifting bars are used in the lifting means. The slab construction method of lifting the plate unit and bringing the deck plate unit to the level where the concrete slab of the building is to be constructed is to lift the deck plate unit using the lifting bar connected to the reinforcing bar of the deck plate with the reinforcing bar truss. Then, the deck plate unit can be carried into the level where the concrete slab of the building is constructed, and the beam integrated structure for reinforcing the concrete slab is constructed on the predetermined level of the building by using the deck plate unit. can do.

In the slab construction method, the height level of the reinforcing bars arranged in the crossing direction with respect to the deck plate unit is substantially the same as the height level of the PC steel material of the PC beam before connecting the reinforcing bars to the reinforcing bar truss by the reinforcing bar connecting step. Before connecting those reinforcing bars to the reinforcing bars of the deck plate with reinforcing bars (at the same time as installing the concrete slab in the construction space between the PC beams of the building), the height of the PC steel of the PC beams. It is possible to construct a PC beam integrated structure including reinforcing bars that line up in the crossing direction at almost the same height level as the level, and line up in the crossing direction at almost the same height level as the height level of the PC steel material of the PC beam. By constructing a PC beam integrated structure including reinforcing bars, it is possible to create a beam integrated structure integrated with a PC beam, and by creating a beam integrated structure integrated with a PC beam, a PC beam can be created. It is possible to secure the strength of the concrete slab with a large area (large span) constructed between the PC beams, and it is possible to make a concrete slab having sufficient strength to connect to the beam integrated structure between the PC beams.

After installing the deck plate unit, or substantially at the same time as installing the deck plate unit, the slab construction method of connecting both ends of the reinforcing bars to anchor bolts or reinforcing bars extending from PC beams facing in one direction is a method of connecting those reinforcing bars. And the anchor bolts or reinforcing bars of the PC beam connected to the ends of those reinforcing bars, it is possible to secure the strength of the concrete slab with a large area (large span) constructed between the PC beams, and it is possible to secure the strength of the PC beam. A concrete slab with sufficient strength can be made between them.

The deck plate with a reinforcing bar truss has a steel plate base of a predetermined area, and the reinforcing bar truss has an upper end bar that is separated upward from the steel plate base, a lower end bar located between the steel plate base and the upper end bar, and a steel plate base and an upper end bar. It is formed from a lattice bar that repeatedly bends in the vertical direction, and the lower part of the lattice bar is welded and fixed to the iron plate base, and those reinforcing bars that are lined up vertically separated by a predetermined dimension are the upper end bar and the lower end bar. Slab construction in which those reinforcing reinforcing bars that are connected to one of the lattice bars and are lined up at a predetermined dimension in the vertical direction are connected to at least the lower end bar and the lattice bar of the upper end bar, the lower end bar, and the lattice bar. The method was formed from a PC beam, a steel plate base and upper and lower end bars, the end of a deck plate with a reinforcing bar truss including lattice bars, reinforcing reinforcing bars connected to the lower end bars and lattice bars, and integrated with the PC beam. It is possible to construct a beam-integrated structure, and by creating a beam-integrated structure integrated with a PC beam, it is possible to secure the strength of a concrete slab with a large area (large span) constructed between PC beams. It is possible to make a concrete slab with sufficient strength to connect to the beam integral structure between the PC beams.

A partially enlarged perspective view of a deck plate with a reinforcing bar truss shown as an example. A perspective view partially showing a deck plate unit made from a deck plate with a reinforcing bar truss. Partially enlarged perspective view of a deck plate with a reinforcing bar truss with reinforcing bars attached. A perspective view partially showing a deck plate unit to which reinforcing bars are attached. The perspective view which shows an example of the unit installation process. The perspective view of the unit installation process which continues from FIG. The front view of the deck plate unit which shows the unit installation process of FIG. A partially enlarged plan view showing an example of an end connection process. The plan view which shows an example of the construction space which completed the unit installation process and the end connection process. The front view of the deck plate unit which shows an example of the beam integrated structure construction process. The perspective view which shows the 1st deck plate unit of another example which attached the 1st reinforcing bar partially. The perspective view which shows the 2nd deck plate unit of another example which attached the 2nd reinforcing bar partially. The front view of the 1st deck plate unit which shows another example of a unit installation process. The front view of the 2nd deck plate unit which shows another example of a unit installation process. The plan view which shows the other example of the 1st to 3rd construction spaces which completed the unit installation process and the end connection process. Front view of the deck plate unit showing another example of the beam integrated structure construction process. Front view of the deck plate unit showing another example of the beam integrated structure construction process. A perspective view partially showing another example deck plate unit with reinforcing bars attached. Front view of the deck plate unit showing another example of the unit installation process. Front view of the deck plate unit showing another example of the beam integrated structure construction process. The perspective view which shows the 1st deck plate unit of another example which attached the 1st reinforcing bar partially. The front view of the 1st deck plate unit which shows another example of a unit installation process. The perspective view which shows the 2nd deck plate unit of another example which attached the 2nd reinforcing bar partially. The front view of the 2nd deck plate unit which shows another example of a unit installation process. Front view of the deck plate unit showing another example of the beam integrated structure construction process. Front view of the deck plate unit showing another example of the beam integrated structure construction process.

The details of the slab construction method according to the present invention will be described below with reference to the attached drawings such as FIG. 1, which is a partially enlarged perspective view of the deck plate 10 with a reinforcing bar truss shown as an example. 2 is a perspective view partially showing the deck plate unit U1 made from the deck plate 10 with the reinforcing bar truss, and FIG. 3 is a partially enlarged perspective view of the deck plate 10A with the reinforcing bar truss to which the reinforcing bar is attached. Is. FIG. 4 is a perspective view partially showing the deck plate unit U1 to which the reinforcing reinforcing bars are attached. In FIGS. 1 and 2, the vertical direction (intersection direction) is indicated by an arrow A, the width direction (one direction) is indicated by an arrow B, and the vertical direction is indicated by an arrow C.

The slab construction method uses a deck plate 10 with a reinforced truss, and carries out a unit creation process, a height level adjustment process, a reinforced reinforcement connection process, a unit installation process, an end connection process, and a beam integrated structure construction process. , Concrete slab 44 (ceiling slab or floor slab) with a predetermined area in the construction spaces S, S1 to S3 between the PC beams 34a, 34b, 35a, 35b on the predetermined floor (1st floor to nth floor) of the building (building). , Roof slab, etc.), and a beam integrated structure 45 integrated with PC beams 34a and 34b for reinforcing the concrete slab 44.

As shown in FIG. 1, the deck plate 10 with a reinforcing bar truss used in the slab construction method includes a vertically long iron plate base 11 having a predetermined area and two reinforcing bar trusses 12 installed on the iron plate base 11 and extending in the vertical direction. It is formed from and. The iron plate base 11 has both end edges 13 extending in the width direction, both side edge portions 14 extending in the vertical direction, and a substantially flat upper surface 15 and lower surface 16. As the iron plate base 11, a plain iron plate or an iron plate on which a predetermined design (not shown) is printed (printed) on the lower surface 16 thereof is used. The area of the iron plate base 11 is not particularly limited, and the area can be freely set according to the size of the concrete slab 44 to be constructed.

The reinforcing bar trusses 12 are arranged at substantially equal intervals in the width direction on the upper surface 15 of the iron plate base 11. The reinforcing bar trusses 12 have the same shape and the same size, and are installed in substantially the center of one region and substantially the center of the other region in each region of the iron plate base 11 divided in the width direction. The reinforcing bar truss 12 is formed of one upper end bar 17 (horizontal bar), two (pair) lower end bars 18 (horizontal bar), and two (pair) lattice bars 19 (horizontal bar). The upper end bar 17, the lower end bar 18, and the lattice bar 19 are made of an iron bar having a circular cross section made by stretching iron or a deformed metal bar (deformed bar) having a plurality of nodes (ribs) on the peripheral surface thereof. ing. There is no limit to the number of reinforcing bar trusses 12 installed on the iron plate base 11, and even if three or more reinforcing bar trusses 12 are installed on the iron plate base 11 depending on the area of the iron plate base 11 and the size of the reinforcing bar truss 12. good.

The iron plate base 11 is formed with a plurality of ridges 20 that are convex upward from the upper surface thereof. The ridges 20 are located on both sides of the upper end bar 17 in the width direction with the upper end bar 17 interposed therebetween, and extend in the vertical direction on the upper surface 15 of the iron plate base 11. In these ridges 20, a part of the iron plate base 11 is bent inward in the width direction, a part of the iron plate base 11 is mountain-folded upward from the upper surface 15 thereof, and the lower surfaces 16 of the iron plate base 11 are formed in the mountain-folded portion. It is made by pressure welding without gaps or by opening a predetermined gap. The vertical height dimension of the ridge 20 is adjusted in the range of 5 to 10 mm.

A first hook 21 (first engaging portion) is formed on one side edge portion 14 of the iron plate base 11, and a second hook 22 (second engaging portion) is formed on the other side edge portion 14. Has been done. The first hook 21 is made by bending one side edge portion 14 of the iron plate base 11 inward in the width direction toward the upper surface 15 of the iron plate base 11. The second hook 22 is made by bending the other side edge portion 14 of the iron plate base 11 inward in the width direction toward the lower surface 16 of the iron plate base 11. Each iron plate base 11 can connect each iron plate base 11 in the width direction by engaging the first hook 21 of one iron plate base 11 with the second hook 22 of the other iron plate base 11.

The upper end reinforcing bar 17 of the reinforcing bar truss 12 is located between the ridges 20 adjacent to each other in the width direction and between the both end edges 13 of the iron plate base 11, and is separated from the upper surface 15 of the iron plate base 11 by a predetermined dimension. It extends straight in the vertical direction. In each reinforcing bar truss 12, the length dimension of the upper end bars 17 arranged in the width direction in the vertical direction is substantially the same, and the upper end bars 17 are arranged in parallel. The lower end bar 18 of the reinforcing bar truss 12 extends straight in the vertical direction at a predetermined dimension upward from the upper surface 15 of the steel plate base 11. The lower end bars 18 are arranged below the upper end bars 17 and on both sides in the width direction of the upper end bars 17 between the upper surface 15 of the iron plate base 11 and the upper end bars 17. The lower end bars 18 are located between the edge portions 13 at both ends of the iron plate base 11, and extend vertically from the upper surface 15 of the iron plate base 11 at a predetermined dimension apart. In each reinforcing bar truss 12, the lower end bars 18 arranged in the width direction have substantially the same length dimension in the vertical direction, and the lower end bars 18 are arranged in parallel.

The lattice streaks 19 are located between the ridges 20 adjacent to each other in the width direction, and are located between the iron plate base 11 and the upper end streaks 17, and are vertically bent (undulating) in a wavy shape in the vertical direction. It is extending. The lattice muscles 19 are arranged symmetrically in the width direction with the upper end muscle 17 interposed therebetween. The lattice bar 18 is inclined in the front-rear direction between the upper convex portion 23 located on the upper end bar 17 side, the lower concave portion 25 located on the upper surface 15 side of the iron plate base 11, and the upper convex portion 23 and the lower concave portion 25. It has an intermediate portion 24 extending therein. The lattice bar 19 is not perpendicular to the iron plate base 11, but is inclined at a predetermined angle with respect to the iron plate base 11, and extends laterally from the upper convex portion 23 toward the lower concave portion 25.

The upward convex portion 23 of the lattice muscle 19 is bent in a convex shape and is bent so as to be convex upward. The upper convex portion 23 is in contact with the peripheral surface of the upper end bar 17, and a portion (intersection point) of the upper convex portion 23 that intersects with the upper end bar 17 is welded (fixed) to the upper end bar 17 by spot welding. The intermediate portion 24 of the lattice bars 19 is located inside the lower end reinforcement 18, and the portion (intersection portion) of the intermediate portion 24 that intersects the lower end reinforcement 18 is welded (fixed) to the lower end reinforcement 17 by spot welding. There is.

The lower concave portion 25 of the lattice muscle 19 is bent in a concave shape and is bent so as to be concave downward. The lower recess 25 is formed with a bent portion 26 bent outward in the width direction so as to be parallel to the upper surface 15 of the iron plate base 11. The bent portion 26 of the lower recess 25 draws an arc outward in the width direction, and a part thereof protrudes outward in the width direction from the ridge 20 and intersects the ridge 20 at two points. The intersection of the bent portions 26 that intersects the ridge 20 is welded (fixed) to the ridge 20 by spot welding. The bent portion 26 is separated from the upper surface 15 of the iron plate base 11 by a predetermined dimension upward.

It is not necessary that the bent portion 26 is formed in the lower recess 25 of the lattice muscle 19 without bending the lower recess 25 of the lattice muscle 19. In this case, the portion of the lower recess 25 of the lattice streak 19 that intersects with the ridge 20 is welded (fixed) to the ridge 20 by spot welding. Further, the ridges 20 may not be formed on the iron plate base 11. In this case, the bent portion 26 of the lower recess 25 of the lattice bar 19 is welded (fixed) to the upper surface 15 of the iron plate base 11 by spot welding, or the lower recess 25 of the lattice bar 19 is spotted on the upper surface 15 of the iron plate base 11. It is welded (fixed) by welding.

Although not shown, the reinforcing bar truss 12 is formed of one upper end bar 17 (horizontal bar), one (pair) lower end bar 18 (horizontal bar), and one (pair) lattice bar 19 (horizontal bar). You may be. In this case, the portion (intersection point) of the upper convex portion 23 of the lattice muscle 19 that intersects with the upper end muscle 17 is welded (fixed) to the upper end muscle 17 by spot welding and intersects with the lower end muscle 18 of the intermediate portion 24 of the lattice muscle 19. The portion (intersection) to be welded (fixed) to the lower end bar 18 by spot welding, and the portion (intersection) intersecting the ridge 20 of the bent portion 26 of the lower recess 25 of the lattice bar 19 becomes the ridge 20. It is welded (fixed) by spot welding.

In the slab construction method, a deck plate 10 with a reinforcing bar truss is produced at a factory, and the produced deck plate 10 with a reinforcing bar truss is carried to the construction site of a building, and a plurality of reinforcing reinforcing bars 27 (spilled bars) and a plurality of reinforcing bars are used. The slab reinforcing bar 28 and a plurality of lifting bars 29 (setup bars) are carried in. Reinforcing bars 27, slab reinforcing bars 28, and lifting bars 29 are made of iron bars with a circular cross section made by stretching iron, or deformed metal bars (deformed bars) having a plurality of nodes (ribs) on the peripheral surface thereof. Has been done.

In the slab construction method, first, a unit making step of making (assembling) the deck plate unit U1 from the brought-in deck plates 10 with reinforcing bar trusses is carried out. In the unit creation process, in a work space (not shown) on the ground adjacent to a construction site, a plurality of deck plates 10 with reinforcing bar trusses are connected in one direction (width direction), and a construction space in a hierarchy for constructing a concrete slab 44. A deck plate unit U1 having a predetermined area corresponding to S is made. In the unit creation process, a plurality of deck plates arranged in one direction (width direction) by engaging (fitting) the first hook 21 of the deck plate 10 with a reinforcing bar truss and the second hook 22 of the other deck plate 10. A plurality of deck plate units U1 formed from 10 are made.

When the unit creation step is completed, the height level adjusting step and the reinforcing bar connecting step are carried out. In the height level adjusting step and the reinforcing bar connecting step, the insertion between the intermediate portion 24 of the lattice bar 19 extending between the upper end bar 17 and the lower end bar 18 of the reinforcing bar truss 12 in the work space on the ground adjacent to the construction site. A plurality of reinforcing reinforcing bars 27 are inserted into the space in one direction (width direction) to form both side regions 30 of the deck plate unit U1. While arranging a plurality of reinforcing bars 27 extending straight in the width direction), the height level of the reinforcing bars 27 in the vertical direction with respect to the deck plate 10 with the reinforcing bar truss (upper surface 15 of the steel plate base 11) is set to the PC beams 34a and 34b. Adjust to be substantially the same as the height level of the PC steel material 40 in the vertical direction.

In the reinforcing bar connecting step, after adjusting the height level, the reinforcing bars 27 having substantially the same height level are arranged (arranged) at approximately equal intervals in the crossing direction (longitudinal direction), and the binding wire is bound. Using (not shown), the reinforcing reinforcing bars 27 are connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar truss 12, and a deck plate unit U1 to which the reinforcing reinforcing bars 27 are connected is formed in both side regions 30. The reinforcing reinforcing bars 27 intersect with the upper end reinforcing bars 17, the lower end reinforcing bars 18, and the lattice bars 19 of the reinforcing bar truss 12 while being separated at substantially equal intervals in the crossing direction (vertical direction) in the bilateral regions 30 of the deck plate unit U1. It extends straight in one direction (width direction). Reinforcing reinforcing bars 27 are not arranged in the residual area 31 (the area between the two-sided areas 30) of the deck plate unit U1 excluding the two-sided area 30.

In the reinforcing bar connecting step, the crossing direction with the reinforcing bar truss 12 of the deck plate 10 with the reinforcing bar extending between the beam surface 37 of the PC beams 34a and 34b and the portion separated by a predetermined dimension in the crossing direction (vertical direction) from the beam surface 37. These reinforcing reinforcing bars 27 that are substantially evenly spaced in the (vertical direction) are connected. The portion separated by a predetermined dimension from the beam surface 37 in the crossing direction (longitudinal direction) is in the range of 1 to 2 m from the beam surface 37.

Further, a pair of lifting bars 29 (setup bars) are placed in one direction (width direction) in the insertion space between the intermediate portions 24 of the lattice bars 19 extending between the upper end bars 17 and the lower end bars 18 of the reinforcing bar truss 12. While inserting and arranging the lifting bars 29 extending in one direction (width direction) in the residual area 31 excluding the side areas 30 on both sides of the deck plate unit U1, the lifting bars 29 are bound to the lower end bars 18 of the reinforcing bar truss 12 ( (Not shown) is used to connect. The lifting bars 29 intersect the upper end bars 17, the lower end bars 18, and the lattice bars 19 of the reinforcing bar truss 12 and extend straight in one direction (width direction). Next, at least a plurality of lifting hooks 46 are attached to the predetermined positions of the lifting bars 29. The lifting bars 29 (setup bars) may be arranged in both side regions 30 of the deck plate unit U1, and the lifting bars 29 may be connected to the upper end bars 17 or the lattice bars 19 of the reinforcing bar truss 12.

The height level in the vertical direction with respect to the deck plate unit U1 of the reinforcing reinforcing bars 27 (the upper surface 15 of the steel plate base 11 of the deck plate 10 with the reinforcing bar truss) and the height level in the vertical direction of the PC steel materials 41 of the PC beams 34a and 34b are set. In some cases, the reinforcing reinforcing bars 27 may be connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar truss 12 by using a binding wire without making them substantially the same. Further, the reinforcing bars 27 are separated by a predetermined dimension (irregularly) in the crossing direction (vertical direction) without being separated from each other at substantially equal intervals in the crossing direction (vertical direction). In some cases, the reinforcing reinforcing bars 27 are connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar truss 12. Further, the reinforcing reinforcing bars 27 may be connected to either the upper end reinforcing bar 17 or the lower end reinforcing bar 18 instead of the intermediate portion 24 of the lattice reinforcing bar 19, and the reinforcing reinforcing bars 27 may be connected to the upper end reinforcing bar 17 and the lattice reinforcing bar 19. In some cases, the reinforcing bars 27 are connected to the upper end bars 17 and the lattice bars 19 at the intersections, and the reinforcing reinforcing bars 27 are connected to the lower end bars 18 and the lattice bars 19 at the intersections between the lower end bars 18 and the lattice bars 19.

When the height level adjusting step and the reinforcing bar connecting step are completed, the temporary placement step is carried out. In the temporary placement process, a plurality of deck plate units U1 are vertically placed in the temporary placement space (not shown) on the ground adjacent to the construction site until the preparation for the unit installation process and the preparation for the end connection process are completed. Temporarily store for a specified period in a stacked state. An example of the temporary placement procedure of the deck plate unit U1 in the temporary placement step is as follows.

The wire rope 32 is hung on the lifting hook 46 attached to the lifting bar 29 (setup bar), the wire rope 32 is hung on the sling of the crane 33, and then the deck plate unit U1 is lifted from the ground to the air by the crane 33. After moving the deck plate unit U1 to the temporary storage space, the deck plate unit U1 is lowered into the temporary storage space. Further, the next deck plate unit U1 is lifted in the air by a crane, the deck plate unit U1 is stacked on the deck plate unit U1 temporarily raised earlier, and a plurality of deck plate units U1 are stacked in the vertical direction in the temporary storage space. ..

In the deck plate units U1 stacked vertically, the iron plate base 11 of the deck plate unit U1 located above abuts on the upper end bar 17 of the deck plate unit U1 located below. In the temporary placement process, deck plate units U1 are created for the number of construction spaces S, S1 to S3 on the floor of the building to be built, and these deck plate units U1 are placed in the construction order (the deck plate unit U1 located at the top is the first). The unit U1 to be installed in the building and the deck plate unit U1 located at the bottom are stacked in the temporary storage place in the unit U1) to be installed last. The deck plate units U1 on which the reinforcing reinforcing bars 27 are installed are stored in a temporary storage space in a state of being stacked in the vertical direction. In some cases, the unit installation step and the end connecting step may be carried out after the reinforcing bar 27 is connected to the reinforcing bar truss 12 in the reinforcing bar connecting step without carrying out the temporary placement step.

FIG. 5 is a perspective view showing an example of the unit installation process, and FIG. 6 is a perspective view of the unit installation process following from FIG. 7 is a front view of the deck plate unit U1 showing the unit installation process of FIG. 6, and FIG. 8 is a partially enlarged plan view showing an example of the end connecting process. FIG. 9 is a plan view showing an example of the construction space S in which the unit installation process and the end connection process are completed, and FIG. 10 is a front view of the deck plate unit U1 showing an example of the beam integrated structure construction process. .. In FIG. 5 (during lifting), the deck plate unit U1 is shown abstractly, and the reinforcing bar truss 12, the reinforcing bar 27, and the slab reinforcing bar 28 are not shown.

When the temporary placement step (or the reinforcing bar connecting step if the temporary placement step is not carried out) is completed, the unit installation step is carried out. In the unit installation process, the deck plate unit U1 to which the reinforcing reinforcing bars 27 are connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar truss 12 is placed in a hierarchy in which the concrete slab 44 of the building is constructed by the crane 33 (predetermined lifting means). Carry in.

Lifting attached to the lifting bar 29 (setup bar) of the deck plate unit U1 temporarily placed by the temporary placing step (when the temporary placing step is not performed, the deck plate unit U1 to which the reinforcing bar is attached by the reinforcing bar connecting step) After hanging the wire rope 32 on the hook 46 and hanging the wire rope 32 on the sling of the crane 33, the deck plate unit U1 is lifted in the air by the crane 33, and the construction space S on the floor of the building where the concrete slab 44 is to be constructed. Carry in (transfer) (see Fig. 5). In the building shown in FIG. 9, one construction space S is defined on each floor.

The deck plate unit U1 carried into the construction space S is lowered from the crane 33 to the construction space S on a predetermined level and placed on the construction space S. The construction space S is a substantially quadrangular space surrounded by PC beams 34a and 34b facing in the crossing direction (vertical direction) and PC beams 35a and 35b facing in one direction (width direction). A plurality of anchor bolts 36 extending in one direction (width direction) are attached to those PC beams 35a and 35b facing in one direction (width direction), or a plurality of connecting reinforcing bars 36 extending in one direction (width direction). (Reinforcing bars) are arranged. The anchor bolts 36 attached to the PC beams 35a and 35b or the connecting reinforcing bars 36 (reinforcing bars) arranged on the PC beams 35a and 35b are separated by predetermined intervals (equally spaced apart) in the crossing direction (longitudinal direction). They are lined up in the same state.

In the unit installation step, the vicinity of both ends of the deck plate 10 with the reinforcing bar truss forming the deck plate unit U1 is placed in the vicinity of the beam surface 37 of the PC beams 34a and 34b (see FIG. 6). The end member 38 attached near the edge of the deck plate 10 with the reinforcing bar truss and the hoop bars 39 of the PC beams 34a and 34b are connected by the hook bars 40 (connecting means), so that the deck plate unit in the construction space S is connected. U1 is connected and fixed to the PC beams 34a and 34b (see FIG. 7). The connecting means is not particularly limited, and the deck plate unit U1 can be connected and fixed to the reinforcing bars of the PC beams 34a and 34b by other connecting means for connecting the reinforcing bars to each other.

In the unit installation process, the deck plate unit U1 is connected and fixed to the reinforcing bars (hoop bars 39) of the PC beams 34a and 34b by the connecting means, and at the same time, it is unidirectionally (width direction) to the deck plate 10 with the reinforcing bar truss (deck plate unit U1). A plurality of slab reinforcing bars 28 extending to are arranged. The upper end of the deck plate 10 with a reinforcing bar truss in a state where the slab reinforcing bars 28 are equally spaced in the crossing direction (vertical direction) (or in a state where they are separated by a predetermined dimension (irregularly) in the crossing direction (vertical direction)). It is placed on the bars 17 and the slab reinforcing bars 28 are connected to the upper end bars 17 of the reinforcing bar truss 12 by using a binding line (not shown). In the deck plate unit U1, the slab reinforcing bars 28 intersect the upper end bars 17, the lower end bars 18, and the lattice bars 19 of the reinforcing bar truss 12 and extend linearly in one direction (width direction).

When the unit installation process is completed (after the deck plate unit U1 is installed in the construction space S), the end connection process is carried out. In the end connecting step, as shown in FIG. 8, both ends 42 of the reinforcing reinforcing bars 27 and the slab reinforcing bars are attached to the plurality of anchor bolts 36 attached to the PC beams 35a and 35b facing in one direction (width direction). Both ends of 28 are attached. Alternatively, both ends 42 of the reinforcing bars 27 and both ends of the slab reinforcing bars 28 are attached to a plurality of connecting reinforcing bars 36 (reinforcing bars) arranged on the PC beams 35a and 35b facing in one direction (width direction). .. The end connection step may be performed at the same time as the unit installation step (substantially at the same time as the installation of the deck plate unit U1).

When the unit installation process and the end connection process are completed, the beam integrated structure construction process is carried out. In the beam integrated structure construction process, concrete 43 is cast on the upper surface 15 of the deck plate unit U1 installed and fixed in the construction space S by the unit installation process and the upper surfaces of the PC beams 34a, 34b, 35a, 35b with a predetermined covering size. It is installed and the concrete 43 is cured for a predetermined period (see FIG. 10). When the beam integrated structure construction process is completed, the concrete slab 44 is formed in the construction space S between the PC beams 34a and 34b facing in the crossing direction (vertical direction) and the PC beams 35a and 35b facing in one direction (width direction). Is constructed, and a beam integrated structure 45 integrated with PC beams 34a and 34b (PC steel 41, reinforced concrete, concrete 43) is constructed.

As shown in FIG. 10, the beam integrated structure 45 includes the PC beams 34a and 34b and both ends of the deck plate 10 with a reinforcing bar truss forming the bilateral regions 30 of the deck plate unit U1 (beams of the PC beams 34a and 34b). A plurality of reinforcing bars having a height level substantially equal to the height level of the PC steel material 41 of the PC beams 34a and 34b) and between the surface 37 and a portion separated by a predetermined dimension in the vertical direction (intersection direction) from the beam surface 37). 27, formed from hardened concrete 43. The beam integrated structure 45 improves the strength (tensile strength, compressive strength, shear strength) of the constructed concrete slab 44 together with the PC beams 34a and 34b.

In the slab construction method, a plurality of deck plates 10 with reinforcing bars used for the construction of the concrete slab 44 are connected in one direction (width direction) in the work space on the ground, and the concrete slab 44 is constructed on a predetermined level of the building. A deck plate unit U1 having a predetermined area corresponding to the construction space S is formed, and one at both ends (both ends) of the deck plate 10 with reinforcing bars forming the side areas 30 on both sides of the deck plate unit U1 in the work space on the ground. While arranging a plurality of reinforcing bars 27 extending in the direction, the reinforcing bars 27 are connected to the reinforcing bars 12 located at both ends (both ends) of the deck plate 10 with the reinforcing bars, and the reinforcing bars 27 are connected to the reinforcing bars 12. The deck plate unit U1 to which the concrete slabs 44 are connected is carried into the construction space S on the floor where the concrete slab 44 is to be constructed by a predetermined lifting means, and is unidirectionally (width direction) with the PC beams 34a and 34b facing the crossing direction (vertical direction). While arranging the deck plate unit U1 in the construction space S between the PC beams 35a and 35b facing the concrete, the beam surfaces 37 of the PC beams 34a and 34b are connected to both ends of the deck plate 10 with the reinforcing bar truss by a predetermined connecting means. Installed in the vicinity, concrete 43 is placed on the upper surface 15 of the deck plate unit U1 and the upper surface of the PC beams 34a, 34b, 35a, 35b with a predetermined covering size, and the concrete slab 44 is constructed in the construction space S. Since the beam integrated structure 45 integrated with the PC beams 34a, 34b is constructed, the concrete slab 44 is installed in the construction space S between the PC beams 34a, 34b, 35a, 35b of the building, and at the same time, the concrete slab 44 is constructed. Deck plate 10 with reinforcing bar truss (steel plate base 11, upper and lower end bars 17, 18, lattice bar 19) forming both side regions 30 of the beam integrated structure 45 (PC beams 34a, 34b, deck plate unit U1) for reinforcing (Including), both ends (both ends), reinforced reinforcing bars 27 at a height level substantially equal to the height level of the PC steel material 41 of the PC beams 34a and 34b, and the concrete 43 are formed integrally with the PC beams 34a and 34b. It is possible to construct the existing beam-integrated structure 45).

The slab construction method is as follows: by constructing the beam integrated structure 45 at the same time as the concrete slab 44, the beam integrated structure 45 integrated with the PC beams 34a and 34b (PC beams 34a and 34b, both sides of the deck plate unit U1). Height level of both ends (both ends) of the deck plate 10 with a reinforcing bar truss (including the steel plate base 11, upper and lower end bars 17, 18, and lattice bars 19) forming the area 30 and the PC steel material 41 of the PC beams 34a and 34b. It is possible to make a beam integrated structure 45) formed from reinforcing reinforcing bars 27 and concrete 43 having substantially the same height level and integrated with PC beams 34a and 34b, and integrated with PC beams 34a and 34b. By making the beam integrated structure 45, the strength (tensile strength, compressive strength, shear strength) of the concrete slab 44 having a large area (large span) constructed in the construction space S between the PC beams 34a, 34b, 35a, 35b. ) Can be secured, and a concrete slab 44 having sufficient strength (tensile strength, compressive strength, shear strength) connected to the beam integrated structure 45 can be formed between the PC beams 34a, 34b, 35a, 35b. ..

FIG. 11 is a perspective view partially showing the first deck plate unit U2 of another example to which the first reinforcing bar 27a is attached, and FIG. 12 is the second of the other example to which the second reinforcing bar 27b is attached. It is a perspective view which shows the deck plate unit U3 partially. FIG. 13 is a front view of the first deck plate units U2, U3, and U4 showing another example of the unit installation process, and FIG. 14 is a second deck plate unit U2, U3 showing another example of the unit installation process. , U4 is a front view. FIG. 15 is a plan view showing another example of the first to third construction spaces S1 to S3 in which the unit installation process and the end connection process are completed, and FIG. 16 is another example of the beam integrated structure construction process. It is a front view of the deck plate unit U2, U3, U4 which shows. FIG. 17 is a front view of deck plate units U2, U3, and U4 showing another example of the beam integrated structure construction process. In FIGS. 11 and 12, the vertical direction (intersection direction) is indicated by an arrow A, the width direction (one direction) is indicated by an arrow B, and the vertical direction is indicated by an arrow C. In FIG. 14, the reinforcing bar truss 12, the slab reinforcing bar 28, and the lifting bar 29 are not shown.

The unit making step in the slab construction method shown in FIGS. 11 to 16 is the same as the unit making step described in FIG. In the slab construction method shown in FIGS. 11 to 16, when the unit creation step is completed, the height level adjusting step and the reinforcing bar connecting step are carried out. In the height level adjusting step and the reinforcing bar connecting step, in the work space on the ground, with the upper end bar 17 of the reinforcing bar truss 12 of the deck plate 10 with the reinforcing bar truss forming one side area 30a of the first deck plate unit U2. A plurality of first reinforcing bars 27 are inserted in one direction (width direction) into the insertion space between the intermediate portions 24 of the truss bars 19 extending between the lower end bars 18. Those first reinforcements extending straight in one direction (width direction) to one end (one end area) of the deck plate 10 with the reinforcing bar truss forming one side area 30a of the first deck plate unit U2. While arranging the reinforcing bars 27a, the height level of the first reinforcing reinforcing bars 27a with respect to the deck plate 10 with the reinforcing bar truss (the upper surface 15 of the steel plate base 11) is set to the vertical height level of the PC steel material 41 of the PC beam 34a. Adjust almost the same as.

After adjusting the height level, the first reinforcing reinforcing bars 27a are connected (arranged) to the reinforcing bar truss 12 located at one end (one end area) of the deck plate 10 with the reinforcing bar truss. The first reinforcing reinforcing bars 27a are separated from each other in the crossing direction (longitudinal direction) at substantially equal intervals in one lateral region 30a of the first deck plate unit U2, and the upper end reinforcing bars 17, the lower end reinforcing bars 18, and the lattice of the reinforcing bar truss 12 are separated. It intersects the streak 19 and extends straight in one direction (width direction).

Further, in the work space on the ground, the intermediate portion of the lattice bars 19 extending between the upper end bars 17 and the lower end bars 18 of the reinforcing bar truss 12 of the deck plate 10 with the reinforcing bar trusses forming the other lateral region 30b of the unit). A plurality of second reinforcing bars 27b are inserted into the insertion space between the 24 in one direction (width direction). Directly in one direction (width direction) to the other end (the other end) of the deck plate 10 with the reinforcing bar truss forming the other side area 30b of the third deck plate unit U3 (nth deck plate unit). While arranging the second reinforcing bars 27b extending in a shape, the height level of the second reinforcing bars 27b in the vertical direction with respect to the deck plate 10 with the reinforcing bar truss (the upper surface 15 of the steel plate base 11) is set to the height level of the PC steel material 34b of the PC beam. Adjust to be approximately the same as the height level in the vertical direction.

After adjusting the height level, the second reinforcing bars 27b are connected (arranged) to the reinforcing bar truss 12 located at the other end (the other end area) of the deck plate 10 with the reinforcing bar truss. In the other lateral region 30b of the third deck plate unit U3, the second reinforcing reinforcing bars 27b are separated at substantially equal intervals in the crossing direction (longitudinal direction), and the upper end reinforcing bars 17, the lower end reinforcing bars 18, and the lattice of the reinforcing bar truss 12 are separated from each other. It intersects the streak 19 and extends straight in one direction (width direction).

In the reinforcing bar connecting step, the first and second reinforcing bars 27a and 27b having substantially the same height level are arranged at substantially equal intervals in the crossing direction (longitudinal direction), and binding lines (not shown) are arranged. A first deck plate in which the first and second reinforcing bars 27a and 27b are connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar twelve 12 and the first reinforcing bars 27a are connected to one lateral region 30a. Along with making the unit U2, a third deck plate unit U3 in which the second reinforcing reinforcing bars 27b are connected to the other side area 30b is made. The second deck plate unit U4 made by the unit making step in which the reinforcing bars 27a and 27b are not connected is separately prepared without carrying out the reinforcing bar connecting step.

In the first deck plate unit U2, the first reinforcing reinforcing bar 27a is not arranged in the residual area 31 excluding one side area 30a and the other side area. In the third deck plate unit U3, the second reinforcing reinforcing bar 27b is not arranged in the residual area 31 excluding the other side area 30b and the one side area. In the reinforcing bar connecting step, the crossing direction with the reinforcing bar truss 12 of the deck plate 10 with the reinforcing bar extending between the beam surface 37 of the PC beams 34a and 34b and the portion separated by a predetermined dimension in the crossing direction (vertical direction) from the beam surface 37. The first and second reinforcing bars 27a and 27b that are substantially evenly spaced in the (vertical direction) are connected. The portion separated by a predetermined dimension from the beam surface 37 in the crossing direction (longitudinal direction) is in the range of 1 to 2 m from the beam surface 37.

A pair of lifting bars 29 (setup bars) are inserted in one direction (width direction) in the insertion space between the intermediate portions 24 of the lattice bars 19 extending between the upper end bars 17 and the lower end bars 18 of the reinforcing bar truss 12. , While arranging the lifting bars 29 extending in one direction (width direction) in the residual area 31 excluding both side areas of the deck plate units U2, U3, U4 (1st to nth deck plate units), the lifting bars 29 are provided. It is connected to the lower end bar 18 of the reinforcing bar truss 12 by using a binding wire (not shown). The lifting bars 29 intersect the upper end bars 17, the lower end bars 18, and the lattice bars 19 of the reinforcing bar truss 12 and extend straight in one direction (width direction). Next, at least a plurality of lifting hooks 46 are attached to the predetermined positions of the lifting bars 29. The lifting bars 29 (setup bars) may be arranged on both sides of the deck plate units U2, U3, and U4, or the lifting bars 29 may be connected to the upper end bars 17 or the lattice bars 19 of the reinforcing bar truss 12. ..

The height level of the first and second reinforcing bars 27a and 27b in the vertical direction with respect to the first and third deck plate units U2 and U3 (the upper surface 15 of the steel plate base 11 of the deck plate 10 with the reinforcing bar truss) and the PC beam 34a, The first and second reinforcing bars 27a and 27b are attached to the intermediate portion 24 of the lattice bar 19 of the reinforcing bar truss 12 by using the binding wire without making the height level of the PC steel 41 of 34b substantially the same in the vertical direction. May be linked. Further, the first and second reinforcing bars 27a and 27b are separated by a predetermined dimension in the crossing direction (vertical direction) without separating the first and second reinforcing bars 27a and 27b in the crossing direction (vertical direction) at substantially equal intervals. In a state of being (irregularly separated), the first and second reinforcing bars 27a and 27b may be connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar truss 12 by using a binding wire.

Further, the first and second reinforcing bars 27a and 27b may be connected to either the upper end bar 17 and the lower end bar 18 instead of the intermediate portion 24 of the lattice bar 19, and the first and second reinforcing bars thereof may be connected. Reinforcing bars 27a and 27b are connected to the upper end bars 17 and the lattice bars 19 at the intersections of the upper end bars 17 and the lattice bars 19, and the first and second reinforcing bars 27a and 27b are the intersections of the lower end bars 18 and the lattice bars 19. It may be connected to the lower end muscle 18 and the lattice muscle 19 at the location.

When the height level adjusting step and the reinforcing bar connecting step are completed, the temporary placement step is carried out. In the temporary placement process, a plurality of first deck plate units U2 and third deck plate units U3 are placed in the temporary placement space on the ground adjacent to the construction site until the preparation for the unit installation process and the preparation for the end connection process are completed. , The second deck plate unit U4 is temporarily placed for a predetermined period in a state of being stacked in the vertical direction. Since the temporary placement procedure of the first to third deck plate units U2, U3, and U4 in the temporary placement process is the same as that of the deck plate unit U1, the explanation of the temporary placement procedure of the deck plate unit U1 is used to refer to the deck plate. The description of the temporary placement procedure in the units U2, U3, and U4 will be omitted.

In the temporary placement process, deck plate units U2, U3, and U4 are created as many as the number of construction spaces S1 to S3 on the floor of the building to be built, and the deck plate units U2, U3, and U4 are stacked in the temporary storage location in the order of construction. In some cases, the unit installation step and the end connecting step may be carried out after the reinforcing bar 27 is connected to the reinforcing bar truss 12 in the reinforcing bar connecting step without carrying out the temporary placement step.

When the temporary placement step (or the reinforcing bar connecting step if the temporary placement step is not carried out) is completed, the unit installation step is carried out. In the unit installation process, the first and third deck plate units U2, U3 and the reinforcing bars 27a, 27b in which the first and second reinforcing bars 27a, 27b are connected to the intermediate portion 24 of the lattice bar 19 of the reinforcing bar truss 12 are provided. The unconnected second deck plate unit U4 is carried into the layer where the concrete slab 44 of the building is to be constructed by the crane 33 (predetermined lifting means).

Deck plate units U2, U3, U4 temporarily placed by the temporary placement step (If the temporary placement step is not performed, the first and third reinforcing bars 27a and 27b to which the first and second reinforcing bars 27a and 27b are attached by the reinforcing bar connecting step) The wire rope 32 is hung on the lifting hook 46 attached to the lifting bar 29 (setup bar) of the deck plate units U2 and U3 and the second deck plate unit U4) made by the unit creation process, and the wire rope is hooked on the sling of the crane 33. After hanging the 32, the first to third deck plate units U2, U3, and U4 are lifted in the air by the crane 33, and are carried (transferred) into the construction spaces S1 to S3 on the floor of the building where the concrete slab 44 is to be constructed. Incorporated in Fig. 5). In the building shown in FIG. 15, three construction spaces S1 to S3 arranged in the crossing direction (vertical direction) are defined on each floor.

The first to third deck plate units U2, U3, and U4 carried into the construction spaces S1 to S3 are unloaded from the crane 33 to the predetermined construction spaces S1 to S3 on the predetermined floor, and placed in the construction spaces S1 to S3. Will be done. The construction space S1 is a substantially square space surrounded by a PC beam 34a (main beam) facing the crossing direction (vertical direction), a small beam 47a, and PC beams 35a, 35b facing one direction (width direction). be. The construction space S2 is a substantially quadrangular space surrounded by small beams 47a and 47b facing each other in the crossing direction (vertical direction) and PC beams 35a and 35b facing each other in one direction (width direction). The construction space S3 is a substantially square space surrounded by small beams 47b facing in the crossing direction (vertical direction), PC beams 34b (main beams), and PC beams 35a and 35b facing in one direction (width direction). be. A plurality of anchor bolts 36 extending in one direction (width direction) are attached to those PC beams 35a and 35b facing in one direction (width direction), or a plurality of connecting reinforcing bars 36 extending in one direction (width direction). (Reinforcing bars) are arranged.

In the unit installation process, the vicinity of both ends of the deck plate 10 with the reinforcing bar truss forming the first deck plate unit U2 is located near the beam surface 37 of the PC beam 34a and the beam surface of the small beam 47a that define the construction space S1. It will be placed. The vicinity of both ends of the deck plate 10 with the reinforcing bar truss forming the second deck plate unit U4 is placed near the beam surface of each of the beams 47a and 47b defining the construction space S2. Further, the vicinity of both ends of the deck plate 10 with the reinforcing bar truss forming the third deck plate unit U3 is placed in the vicinity of the beam surface of the small beam 47b and the vicinity of the beam surface of the PC beam 34b defining the construction space S3. ..

The end member 38 attached near the end edge of the deck plate 10 with the reinforcing bar truss and the hoop bar 39 of the PC beam 34a are connected by the hook bar 40 (connecting means), and the end member 38 and the hoop bar of the beam 47a are connected. By connecting 39 to the hook bar 40 (connecting means), the first deck plate unit U2 is connected and fixed to the PC beam 34a and the small beam 47a in the construction space S1. The end member 38 attached near the edge of the deck plate 10 with the reinforcing bar truss and the hoop bars 39 of the beams 47a and 47b are connected by the hook bar 40 (connecting means), so that the third deck in the construction space S2. The plate unit U4 is connected and fixed to the beams 47a and 47b.

The end member 38 attached near the edge of the deck plate 10 with the reinforcing bar truss and the hoop bar 39 of the beam 47b are connected by the hook bar 40 (connecting means), and the end member 38 and the hoop bar of the PC beam 34b are connected. By connecting 39 to the hook bar 40 (connecting means), the third deck plate unit U3 is connected and fixed to the PC beam 43b and the small beam 47b in the construction space S3. The connecting means is not particularly limited, and the deck plate units U2, U3, and U4 can be connected and fixed to the reinforcing bars of the PC beams 34a, 34b, the beam 47a, and 47b by other connecting means for connecting the reinforcing bars.

In the unit installation process, the first to third deck plate units U2, U3, and U4 are connected and fixed to the reinforcing bars of the PC beams 34a, 34b and the beam 47a, 47b by the connecting means, and at the same time, the deck plate 10 with the reinforcing bar truss ( A plurality of slab reinforcing bars 28 extending in one direction (width direction) are arranged in the first to third deck plate units U2, U3, U4). The upper end of the deck plate 10 with a reinforcing bar truss in a state where the slab reinforcing bars 28 are equally spaced in the crossing direction (vertical direction) (or in a state where they are separated by a predetermined dimension (irregularly) in the crossing direction (vertical direction)). It is placed on the bars 17 and the slab reinforcing bars 28 are connected to the upper end bars 17 of the reinforcing bar truss 12 by using a binding line (not shown). In the deck plate units U2, U3, and U4, the slab reinforcing bars 28 intersect the upper end bars 17, the lower end bars 18, and the lattice bars 19 of the reinforcing bar truss 12 and extend straight in one direction (width direction).

When the unit installation process is completed (after installing the first to third deck plate units U2, U3, U4 in the construction spaces S1 to S3), the end connection process is carried out. In the end connecting step, both ends 42 and slab reinforcing bars of the first and second reinforcing bars 27a and 27b are attached to a plurality of anchor bolts 36 attached to the PC beams 35a and 35b facing in one direction (width direction). Both ends of 28 are attached. Alternatively, both ends 42 and slab reinforcing bars of the first and second reinforcing bars 27a and 27b are connected to a plurality of connecting reinforcing bars 36 (reinforcing bars) arranged on the PC beams 35a and 35b facing in one direction (width direction). Both ends of 28 are attached (see FIG. 8). The end connection step may be performed at the same time as the unit installation step (substantially at the same time as the installation of the first to third deck plate units U2 to U4).

When the unit installation process and the end connection process are completed, the beam integrated structure construction process is carried out. In the beam integrated structure construction process, the upper surfaces 15 of the first to third deck plate units U2 to U4 installed and fixed in the construction spaces S1 to S3 by the unit installation process, the PC beams 34a, 34b, 35a, 35b and the beam 47a. , 47b The concrete 43 is placed on the upper surface of the top surface and the concrete 43 with a predetermined covering size, and the concrete 43 is cured for a predetermined period (see FIG. 16). When the beam integrated structure construction process is completed, concrete is formed in the construction spaces S1 to S3 between the PC beams 34a and 34b facing in the crossing direction (vertical direction) and the PC beams 35a and 35b facing in one direction (width direction). Along with the construction of the slab 44, the beam integrated structure 45 integrated with the PC beams 34a and 34b (PC steel 41, reinforcing bar, concrete 43) is constructed.

As shown in FIGS. 16 and 17, the beam integrated structure 45 includes the PC beams 34a and 34b and the deck plate 10 with a reinforcing bar truss forming the side regions 30a and 30b of the first and third deck plate units U2 and U3. (Between the beam surface 37 of the PC beams 34a and 34b and the portion separated by a predetermined dimension in the vertical direction (intersection direction) from the beam surface 37) and the height level of the PC steel material 41 of the PC beams 34a and 34b. It is formed of a plurality of first and second reinforcing bars 27a and 27b having substantially the same height level as above, and hardened concrete 43. The beam integrated structure 45 improves the strength (tensile strength, compressive strength, shear strength) of the constructed concrete slab 44 together with the PC beams 34a and 34b.

In the slab construction method, a plurality of deck plates 10 with reinforcing bars used for the construction of the concrete slab 44 are connected in one direction (width direction) in the work space on the ground, and the concrete slab 44 is constructed on a predetermined level of the building. 1st to 3rd deck plate units U2, U3, U4 (1st to nth deck plate units) having a predetermined area corresponding to the 1st to 3rd construction spaces S1 to S3 (1st to nth construction spaces) are made. , Extends in one direction (width direction) to one end (one end) of those deck plates 10 with reinforced truss forming one side area 30a of the first deck plate unit U2 in a work space on the ground. While arranging a plurality of first reinforcing reinforcing bars 27a, the first reinforcing reinforcing bars 27a are connected to the reinforcing bar truss 12 located at one end of the deck plate 10 with the reinforcing bar truss, and the third deck plate unit U3 (the nth). A plurality of second reinforcing bars 27b extending in one direction (width direction) are arranged at the other end (the other end) of the deck plate 10 with the reinforcing bars forming the other side area 30b of the deck plate unit). While doing so, the second reinforcing bars 27b were connected to the reinforcing bars 12 located at the other end of the deck plate 10 with the reinforcing bars, and the first and second reinforcing bars 27a and 27b were connected to the reinforcing bars 12. The deck plate units U2 to U4 including the first and third deck plate units U2 and U3 are carried into the construction spaces S1 to S3 on the floor where the concrete slab 44 is to be constructed by a predetermined lifting means, and are carried in the crossing direction (vertical direction). The first to third construction spaces S1 to S3 (first to nth construction spaces) between the facing PC beams 34a and 34b and the facing PC beams 35a and 35b in one direction (width direction). 3 While arranging the deck plate units U2 to U4 adjacent to each other in the crossing direction (vertical direction), the vicinity of both ends of the deck plate 10 with the reinforced truss is near the beam surface 37 of the PC beams 34a and 34b by a predetermined connecting means. Concrete is poured into the upper surfaces 15 of the first to third deck plate units U2 to U4 and the upper surfaces of the PC beams 34a, 34b, 35a, 35b and the beam 47a, 47b with a predetermined covering size. Since the concrete slab 44 is constructed in the first to third construction spaces S1 to S3 and the beam integrated structure 45 integrated with the PC beams 34a and 34b is constructed, the PC beams 34a, 34b, 35a and 35b of the building are constructed. No. 1 between At the same time as constructing the concrete slab 44 in the 1st to 3rd construction spaces S1 to S3, the beam integrated structure 45 for reinforcing the concrete slab 44 (one PC beam 34a, one side area of the first deck plate unit U2). From one end (one end area) of the deck plate 10 with a reinforcing bar truss forming 30a, the first reinforcing reinforcing bar 27a having a height level substantially equal to the height level of the PC steel 41 of the PC beam 34a, and the concrete 43. The other end of the deck plate 10 with a reinforced truss forming the beam integrated structure 45 formed and integrated with the PC beam 34a, the other PC beam 34b, and the other lateral region 30b of the third deck plate unit U3. (The other end area), a beam integrated structure formed from the second reinforcing reinforcing bar 27B and concrete 43, which has substantially the same height level as the height level of the PC steel material 41 of the PC beam 34b and is integrated with the PC beam 34b. 45) can be constructed.

In the slab construction method, the beam integrated structure 45 integrated with the PC beams 34a and 34b by constructing the beam integrated structure 45 at the same time as the concrete slab 44 (one PC beam 34a, the first deck plate unit U2). The first reinforcement at a height level substantially equal to the height level of the PC steel 41 of the PC beam 34a, one end (one end area) of the deck plate 10 with a reinforced truss forming one side area 30a. A deck plate with a reinforcing bar truss forming a reinforcing bar 27a, a beam integrated structure 45 formed of concrete 43 and integrated with a PC beam 34a, the other PC beam 34b, and the other lateral region 30b of the third deck plate unit U3. The other end of 10 (the other end area), the height level is almost the same as the height level of the PC steel 41 of the PC beam 34b, the second reinforcing reinforcing bar 27B, and the concrete 43 are formed integrally with the PC beam 34b. The beam-integrated structure 45) can be made, and by making those beam-integrated structures 45 integrated with the PC beams 34a, 34b, it was constructed between the PC beams 34a, 34b, 35a, 35b. It is possible to secure the strength (tensile strength, compressive strength, shear strength) of the concrete slab 44 having a large area (large span), and it is sufficient to connect to the beam integrated structure 45 between the PC beams 34a, 34b, 35a, 35b. A concrete slab 44 having strength (tensile strength, compressive strength, shear strength) can be made.

FIG. 18 is a perspective view partially showing another example of the deck plate unit U5 to which the reinforcing bar 27 is attached, and FIG. 19 is a front view of the deck plate unit U5 showing another example of the unit installation process. FIG. 20 is a front view of the deck plate unit U5 showing another example of the beam integrated structure construction process. The difference between the deck plate unit U5 shown in FIG. 18 and that of FIG. 1 is that the deck plate unit U5 forms the side areas 30 on both sides of the deck plate unit U5. A plurality of reinforcing reinforcing bars 27 that are substantially evenly spaced apart from each other are connected, and a plurality of reinforcing reinforcing bars 27 that are substantially evenly spaced apart in the vertical direction are connected to each other.

In the height level adjusting step and the reinforcing bar connecting step after the deck plate unit U5 is made by the unit making step, the intermediate portion 24 of the lattice bar 19 extending between the upper end bar 17 and the lower end bar 18 of the reinforcing bar truss 12 Both ends (both ends) of the deck plate 10 with the reinforcing bar truss forming the side areas 30 on both sides of the deck plate unit U5 while inserting the plurality of reinforcing bars 27 into the insertion space between them in one direction (width direction). A plurality of reinforcing reinforcing bars 27 extending in one direction (width direction) are arranged in one direction. The height level of some of the reinforcing bars 27 in the vertical direction with respect to the deck plate 10 with the reinforcing bar truss (the upper surface 15 of the steel plate base 11) is the vertical height of the PC steel materials 40 of the PC beams 34a and 34b. Adjust to almost the same as the level.

In the reinforcing bar connecting step, after adjusting the height level of the reinforcing bars 27, the reinforcing bars 27 having substantially the same height level are arranged in a state of being substantially equally spaced in the crossing direction (longitudinal direction). Further, the remaining reinforcing bars 27 excluding the reinforcing reinforcing bars 27 arranged in the crossing direction (vertical direction) are arranged in a state of being substantially equidistant in the vertical direction between the upper end reinforcing bars 17 and the lower end reinforcing bars 18 of the reinforcing bar truss 12. These reinforcing reinforcing bars 27, which are lined up at substantially equal intervals in the crossing direction (vertical direction), are connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar truss 12 by using a binding wire (not shown), and are substantially vertically arranged. These reinforcing reinforcing bars 27 arranged at intervals are connected to the lower end reinforcing bars 18 by using a binding wire (not shown).

In the reinforcing bar connecting step, the deck plate unit U5 is formed in which the reinforcing bars 27 separated in the crossing direction (vertical direction) and the vertical direction are connected to both side regions 30. In the side areas 30 on both sides of the deck plate unit U5, the reinforcing reinforcing bars 27 are separated at substantially equal intervals in the crossing direction (vertical direction) and at substantially equal intervals in the vertical direction, and the upper end bars 17 and the lower end bars of the reinforcing bar truss 12 are separated from each other. 18. Crosses the lattice muscle 19 and extends straight in one direction (width direction). Reinforcing reinforcing bars 27 are not arranged in the residual area 31 (the area between the two-sided areas 30) of the deck plate unit U5 excluding the two-sided area 30.

The range in which the reinforcing reinforcing bars 27 are connected is the reinforcing bar truss of the deck plate 10 with a reinforcing bar truss extending between the beam surface 37 of the PC beams 34a and 34b and a portion separated by a predetermined dimension in the crossing direction (longitudinal direction) from the beam surface 37. Both ends (both ends) of 12 (range of 1 to 2 m from the beam surface 37). Since the arrangement of the lifting bars 29 (setup bars) and the attachment of the lifting hooks 46 to the deck plate unit U5 are the same as those to the deck plate unit U1, the description of the deck plate unit U1 in FIG. 1 is referred to and they are used. The explanation of is omitted.

The vertical height level of the reinforcing reinforcing bars 27 with respect to the deck plate unit U5 (the upper surface 15 of the steel plate base 11 of the deck plate 10 with the reinforcing bar truss) and the vertical height levels of the PC steel materials 41 of the PC beams 34a and 34b are set. A plurality of reinforcing reinforcing bars 27 arranged in the crossing direction (vertical direction) and the vertical direction may be connected to a predetermined position of the lattice bar 19 of the reinforcing bar truss 12 without making them substantially the same.

Further, the reinforcing reinforcing bars 27 are separated by a predetermined dimension (irregularly separated) in the crossing direction (vertical direction) and the vertical direction without separating the reinforcing reinforcing bars 27 in the crossing direction (vertical direction) and the vertical direction at substantially equal intervals. ), The reinforcing reinforcing bars 27 may be connected to a predetermined position of the lattice bars 19 of the reinforcing bar truss 12.

Further, the reinforcing reinforcing bars 27 may be connected to either the upper end reinforcing bar 17 or the lower end reinforcing bar 18 instead of the intermediate portion 24 of the lattice reinforcing bar 19, and the reinforcing reinforcing bars 27 may be connected to the upper end reinforcing bar 17 and the lattice reinforcing bar 19. In some cases, the reinforcing bars 27 are connected to the upper end bars 17 and the lattice bars 19 at the intersections, and the reinforcing reinforcing bars 27 are connected to the lower end bars 18 and the lattice bars 19 at the intersections between the lower end bars 18 and the lattice bars 19.

When the height level adjusting step and the reinforcing bar connecting step are completed, the temporary placement step is carried out. Since the temporary placement procedure of the deck plate unit U5 in the temporary placement process is the same as that of the deck plate unit U1, the explanation of the temporary placement procedure of the deck plate unit U1 is referred to, and the explanation of the temporary placement procedure in the deck plate unit U5 is described. Omit. When the temporary placement step (reinforcing reinforcing bar connecting step if the temporary placement step is not carried out) is completed, the unit installation step of installing and fixing the deck plate unit U5 in the construction space S is carried out. Since the installation procedure of the deck plate unit U5 in the unit installation process is the same as that of the deck plate unit U1, the description of the installation procedure of the deck plate unit U1 is referred to, and the description of the installation procedure in the deck plate unit U5 is omitted. In the unit installation process, a plurality of slab reinforcing bars 28 extending in one direction (width direction) are arranged on the deck plate 10 with reinforcing bar truss (deck plate unit U5).

When the unit installation process is completed, the end connection process is carried out. In the end connection step, both ends 42 of the reinforcing reinforcing bars 27 lined up in the crossing direction (vertical direction) and the vertical direction to the plurality of anchor bolts 36 attached to the PC beams 35a and 35b facing in one direction (width direction). And both ends of the slab reinforcing bars 28 lined up in the crossing direction (vertical direction) are attached. Alternatively, both ends 42 of the reinforcing reinforcing bars 27 arranged in the crossing direction (vertical direction) and the vertical direction in the plurality of connecting reinforcing bars 36 (reinforcing bars) arranged in the PC beams 35a and 35b facing in one direction (width direction). And both ends of the slab reinforcing bars 28 lined up in the crossing direction (vertical direction) are attached.

When the unit installation process and the end connection process are completed, the beam integrated structure construction process is carried out. Since the procedure for constructing the beam-integrated structure in the beam-integrated structure construction process using the deck plate unit U5 is the same as that using the deck plate unit U1, the explanation of the beam-integrated structure construction procedure for the deck plate unit U1 is used. However, the description of the beam integrated structure construction procedure in the deck plate unit U5 will be omitted.

When the beam integrated structure construction process is completed, the construction space S between the PC beams 34a and 34b facing in the crossing direction (vertical direction) and the PC beams 35a and 35b facing in one direction (width direction) (see FIG. 9). ), And the beam integrated structure 45 integrated with the PC beams 34a and 34b (PC steel 41, reinforced concrete, concrete 43) is constructed. As shown in FIG. 20, the beam integrated structure 45 includes the PC beams 34a and 34b and both ends of the deck plate 10 with the reinforcing bar truss forming the bilateral regions 30 of the deck plate unit U5 (beams of the PC beams 34a and 34b). Formed from a surface 37 and a location separated by a predetermined dimension in the vertical direction (intersection direction) from the beam surface 37), a plurality of reinforcing bars 27 arranged in the intersection direction (longitudinal direction) and the vertical direction, and a hardened concrete 43. Has been done. The beam integrated structure 45 improves the strength (tensile strength, compressive strength, shear strength) of the constructed concrete slab 44 together with the PC beams 34a and 34b. The slab construction method using the deck plate unit U5 has the same effect as the slab construction method using the deck plate unit U1.

FIG. 21 is a perspective view partially showing another example of the first deck plate unit U6 to which the first reinforcing reinforcing bar 27a is attached, and FIG. 22 is a first deck plate unit showing another example of the unit installation process. It is a front view of U6. FIG. 23 is a perspective view partially showing another example of the second deck plate unit U7 to which the second reinforcing bar 27b is attached, and FIG. 24 is a second deck plate unit showing another example of the unit installation process. It is a front view of U7. FIG. 25 is a front view of the deck plate unit U6 showing another example of the beam integrated structure construction process, and FIG. 26 is a front view of the deck plate unit U7 showing another example of the beam integrated structure construction process. be.

The first deck plate unit U6 shown in FIG. 21 differs from that of FIG. 11 in that one end (one of the deck plates 10 with reinforcing bars trusses) forming one side region 30a of the first deck plate unit U6. A plurality of first reinforcing bars 27a that are substantially evenly spaced in the crossing direction (longitudinal direction) are connected to each other (end area), and a plurality of first reinforcing bars 27a that are substantially evenly spaced in the vertical direction are connected. At the point.

The difference of the second deck plate unit U7 shown in FIG. 24 from that of FIG. 12 is that the other end of the deck plate 10 with the reinforcing bars forming the other side region 30b of the second deck plate unit U7 (the other end). A plurality of second reinforcing bars 27b that are substantially evenly spaced in the crossing direction (longitudinal direction) are connected to each other (end area), and a plurality of second reinforcing bars 27b that are substantially evenly spaced in the vertical direction are connected. At the point.

In the height level adjusting step and the reinforcing bar connecting step after the first deck plate unit U6 is made by the unit making step, the intermediate portion of the lattice bar 19 extending between the upper end bar 17 and the lower end bar 18 of the reinforcing bar truss 12 A deck plate 10 with a reinforcing bar truss that forms one side region 30a of the deck plate unit U6 while inserting a plurality of first reinforcing bars 27a into the insertion space between 24 in one direction (width direction). A plurality of first reinforcing reinforcing bars 27a extending in one direction (width direction) are arranged at one end (one end area). The height level of some of the first reinforcing bars 27a in the vertical direction with respect to the deck plate 10 with the reinforcing bar truss (upper surface 15 of the steel plate base 11) is set in the vertical direction of the PC steel materials 40 of the PC beams 34a and 34b. Adjust to be approximately the same as the height level.

In the height level adjusting step and the reinforcing bar connecting step after the second deck plate unit U7 is made by the unit making step, the intermediate portion of the lattice bar 19 extending between the upper end bar 17 and the lower end bar 18 of the reinforcing bar truss 12 A deck plate 10 with a reinforcing bar truss that forms the other lateral region 30b of the deck plate unit U7 while inserting a plurality of second reinforcing bars 27b into the insertion space between 24 in one direction (width direction). A plurality of second reinforcing bars 27b extending in one direction (width direction) are arranged at the other end (the other end area). The height level of some of the second reinforcing bars 27b in the vertical direction with respect to the deck plate 10 with the reinforcing bar truss (upper surface 15 of the steel plate base 11) is set in the vertical direction of the PC steel materials 40 of the PC beams 34a and 34b. Adjust to be approximately the same as the height level.

In the reinforcing bar connecting step, after adjusting the height levels of the first and second reinforcing bars 27a and 27b, the first and second reinforcing bars 27a and 27b having substantially the same height level are crossed (vertically). Arrange them at approximately equal intervals. Further, the remaining reinforcing bars 27a and 27b excluding the first and second reinforcing bars 27a and 27b arranged in the crossing direction (vertical direction) are approximately placed vertically between the upper end reinforcing bars 17 and the lower end reinforcing bars 18 of the reinforcing bar truss 12. Arrange them in a spaced state. The first and second reinforcing bars 27a and 27b arranged at substantially equal intervals in the crossing direction (vertical direction) are connected to the intermediate portion 24 of the lattice bars 19 of the reinforcing bar truss 12 by using a binding wire (not shown). The first and second reinforcing bars 27a and 27b, which are arranged at substantially equal intervals in the vertical direction, are connected to the lower end bars 18 by using a binding wire (not shown).

In the reinforcing bar connecting step, the deck plate unit U6 is formed in which the first reinforcing bars 27a separated in the crossing direction (vertical direction) and the vertical direction are connected to one side region 30a. The first reinforcing reinforcing bars 27a are separated at substantially equal intervals in the crossing direction (vertical direction) and at substantially equal intervals in the vertical direction in one lateral region 30a of the deck plate unit U6, and the upper end reinforcing bars of the reinforcing bar truss 12 are separated from each other. It intersects with 17, the lower end muscle 18, and the lattice muscle 19 and extends straight in one direction (width direction). The first reinforcing reinforcing bar 27a is not arranged in the residual area 31 of the deck plate unit U6 excluding the side area 30a.

In the reinforcing bar connecting step, the deck plate unit U7 is formed in which the second reinforcing bars 27b separated in the crossing direction (vertical direction) and the vertical direction are connected to the other lateral region 30b. The second reinforcing reinforcing bars 27b are separated at substantially equal intervals in the crossing direction (vertical direction) and at substantially equal intervals in the vertical direction in the other lateral region 30b of the deck plate unit U7, and the upper end reinforcing bars of the reinforcing bar truss 12 are separated from each other. It intersects with 17, the lower end muscle 18, and the lattice muscle 19 and extends straight in one direction (width direction). The second reinforcing bar 27b is not arranged in the residual area 31 of the deck plate unit U7 excluding the side area 30b.

The range for connecting the first and second reinforcing bars 27a and 27b includes a reinforcing bar truss extending between the beam surface 37 of the PC beams 34a and 34b and a portion separated by a predetermined dimension in the crossing direction (longitudinal direction) from the beam surface 37. Both ends (both ends) of the reinforcing bar truss 12 of the deck plate 10 (range of 1 to 2 m from the beam surface 37). Since the arrangement of the lifting bars 29 (setup bars) and the attachment of the lifting hooks 46 to the deck plate unit U6 and the deck plate unit U7 are the same as those to the deck plate unit U2 and the deck plate unit U3, FIGS. 11 and 12 The explanations of the deck plate units U2 and U3 of the above are incorporated, and the explanations thereof are omitted.

The height level in the vertical direction with respect to the deck plate units U6 and U7 of the first and second reinforcing bars 27a and 27b (the upper surface 15 of the steel plate base 11 of the deck plate 10 with the reinforcing bar truss) and the PC steel material 41 of the PC beams 34a and 34b. A plurality of first and second reinforcing bars 27a and 27b arranged in the crossing direction (vertical direction) and the vertical direction are provided with a predetermined number of the lattice bars 19 of the reinforcing bar truss 12 without making the height level in the vertical direction substantially the same. It may be connected to a place.

Further, the first and second reinforcing bars 27a and 27b are separated from each other in the crossing direction (vertical direction) and vertically at approximately equal intervals, and the first and second reinforcing bars 27a and 27b are separated from each other in the crossing direction (vertical direction). The first and second reinforcing bars 27a and 27b may be connected to predetermined positions of the lattice bars 19 of the reinforcing bar truss 12 in a state of being separated by a predetermined dimension (irregularly separated) in the vertical direction.

Further, the first and second reinforcing bars 27a and 27b may be connected to either the upper end bar 17 and the lower end bar 18 instead of the intermediate portion 24 of the lattice bar 19, and the first and second reinforcing bars 27a may be connected. , 27b are connected to the upper end bars 17 and the lattice bars 19 at the intersection of the upper end bars 17 and the lattice bars 19, and the first and second reinforcing bars 27a and 27b are the lower ends at the intersections of the lower end bars 18 and the lattice bars 19. It may be connected to muscle 18 and rebar 19.

When the height level adjusting step and the reinforcing bar connecting step are completed, the temporary placement step is carried out. Since the temporary placement procedure of the deck plate unit U6 and the deck plate unit U7 in the temporary placement process is the same as that of the deck plate unit U1, the explanation of the temporary placement procedure of the deck plate unit U1 is referred to, and the deck plate units U6 and U7 are used. The description of the temporary placement procedure in the above is omitted. When the temporary placement process (reinforcing reinforcement connection step if the temporary placement process is not performed) is completed, the deck plate unit U6 is installed and fixed in the construction space S1 and the deck plate unit U7 is installed and fixed in the construction space S3. Is carried out. Since the installation procedure of the deck plate units U6 and U7 in the unit installation process is the same as that of the deck plate unit U2 and the deck plate unit U3, the explanation of the installation procedure of the deck plate units U2 and U3 is referred to, and the deck plate unit U6 , The description of the installation procedure in U7 will be omitted. In the unit installation process, a plurality of slab reinforcing bars 28 extending in one direction (width direction) are arranged in the deck plates 10 with reinforcing bar trusses (deck plate units U6 and U7).

When the unit installation process is completed, the end connection process is carried out. In the end connecting step, the first and second reinforcing bars are arranged in the crossing direction (vertical direction) and the vertical direction on the plurality of anchor bolts 36 attached to the PC beams 35a and 35b facing in one direction (width direction). Both ends 42 of 27a and 27b and both ends of the slab reinforcing bars 28 arranged in the crossing direction (vertical direction) are attached. Alternatively, the first and second reinforcing bars arranged in the crossing direction (vertical direction) and the vertical direction at the plurality of connecting reinforcing bars 36 (reinforcing bars) arranged on the PC beams 35a and 35b facing in one direction (width direction). Both ends 42 of 27a and 27b and both ends of the slab reinforcing bars 28 arranged in the crossing direction (longitudinal direction) are attached.

When the unit installation process and the end connection process are completed, the beam integrated structure construction process is carried out. Since the procedure for constructing the beam-integrated structure in the beam-integrated structure construction process using the deck plate unit U6 and the deck plate unit U7 is the same as that using the deck plate unit U2 and the deck plate unit U3, the deck plate unit U2 and the deck plate unit U2 The description of the beam-integrated structure construction procedure of U3 is referred to, and the description of the beam-integrated structure construction procedure in the deck plate units U6 and U7 is omitted.

When the beam integrated structure construction process is completed, the construction spaces S1 to S3 between the PC beams 34a and 34b facing in the crossing direction (vertical direction) and the PC beams 35a and 35b facing in one direction (width direction) (FIG. A concrete slab 44 is constructed on the 15), and a beam integrated structure 45 integrated with the PC beams 34a and 34b (PC steel material 41, reinforcing bar, concrete 43) is constructed. As shown in FIGS. 25 and 26, the beam integrated structure 45 is a deck plate 10 with a reinforcing bar truss that forms the PC beams 34a and 34b and the side regions 30a and 30b of the first and third deck plate units U6 and U7. (Between the beam surface 37 of the PC beams 34a and 34b and the location separated by a predetermined dimension in the vertical direction (intersection direction) from the beam surface 37), and a plurality of lines arranged in the intersection direction (vertical direction) and the vertical direction. It is formed of the first and second reinforcing bars 27a and 27b of No. 1 and the hardened concrete 43. The beam integrated structure 45 improves the strength (tensile strength, compressive strength, shear strength) of the constructed concrete slab 44 together with the PC beams 34a and 34b. The slab construction method using the deck plate units U6 and U7 has the same effect as the slab construction method using the deck plate units U2 and U3.

10 Deck plate with reinforced truss 11 Iron plate base 11
12 Reinforcing bar truss 13 Both ends edge 14 Both sides edge 15 Upper surface 16 Lower surface 17 Upper end reinforcement 18 Lower end reinforcement 19 Lattice reinforcement 20 Convex 21 First hook (first engagement part)
22 2nd hook (2nd engaging part)
23 Upper convex part 24 Intermediate part 25 Lower concave part 26 Bending part 27 Reinforcing bar 28 Slab reinforcing bar 29 Lifting bar 30 Both sides area 30a Side area 30b Side area 31 Residual area 32 Wire rope 33 Crane 34a PC beam 34b PC beam 35a PC beam 35b PC beam 36 Anchor bolt or connecting reinforcing bar 37 Beam surface 38 End member 39 Hoop bar
40 Hook bar 41 PC steel 42 Both ends 43 Concrete 44 Concrete slab 45 Beam integrated structure 46 Lifting hook 47a Beam 47b Beam U1 Deck plate unit U2 1st deck plate unit U3 2nd deck plate unit U4 3rd deck plate Unit U6 1st deck plate unit U7 2nd deck plate unit

Claims (7)

In the slab construction method of constructing a concrete slab of a predetermined area on a predetermined floor of a building
In the slab construction method, a plurality of deck plates with reinforcing bars used for the construction of the concrete slab are connected in one direction in a work space on the ground, and a deck having a predetermined area corresponding to the construction space of the hierarchy in which the concrete slab is constructed. The unit creation process to make a plate unit and
In the above-ground work space, a plurality of reinforcing bars extending in one direction intersect at both ends of the deck plates with the reinforcing bar trusses forming the bilateral regions excluding the residual area between the bilateral regions of the deck plate unit. Reinforcing bars that connect the reinforcing bars at a height between the upper and lower ends of the reinforcing bars located at both ends of the deck plate with the reinforcing bar truss while arranging them in a state of being separated by a predetermined dimension in the direction. The connection process and
A deck plate unit in which these reinforcing reinforcing bars are connected to the reinforcing bar truss is carried into the layer where the concrete slab of the building is to be constructed by a predetermined lifting means, and a PC beam facing the crossing direction intersecting one direction of the building. While arranging the deck plate units in the construction space between them, the vicinity of both ends of the deck plates with reinforcing bars are installed in the vicinity of the beam surface of the PC beam by a predetermined connecting means, and the deck plate units are provided on substantially the entire surface. A unit installation step of arranging a plurality of slab reinforcing bars extending in one direction on the upper end reinforcing bars of the reinforcing bar truss in a state of being separated by a predetermined dimension in the crossing direction .
By placing concrete on the upper surface of the deck plate unit with a predetermined covering size and curing the concrete for a predetermined period, the concrete slab is constructed in the construction space between the PC beams facing each other in the crossing direction, and the concrete slab is constructed. The PC beam is formed from the reinforcing reinforcing bars and the concrete arranged on both ends of the deck plate with a reinforcing bar truss forming the bilateral regions of the PC beam and the deck plate unit and the bilateral regions excluding the residual region. A slab construction method characterized by having a beam-integrated structure construction process for constructing an integrated beam-integrated structure. In the slab construction method of constructing a concrete slab of a predetermined area on a predetermined floor of a building
The slab construction method corresponds to the first to nth construction spaces of the hierarchy in which a plurality of deck plates with reinforcing bars used for the construction of the concrete slab are connected in one direction in a work space on the ground and the concrete slab is constructed. The unit creation process to make the 1st to nth deck plate units of a predetermined area,
Those forming the one side area excluding the residual area between one side area and the other side area of the first deck plate unit and the other side area in the work space on the ground. At one end of the deck plate with the reinforcing bar truss, a plurality of first reinforcing bars extending in one direction are arranged in a state of being separated by a predetermined dimension in the crossing direction, and the first reinforcing bars are placed on the deck plate with the reinforcing bar truss. The residual area between the other side area and one side area of the nth deck plate unit connected to the middle height position between the upper end bar and the lower end bar of the reinforcing bar truss located at one end. A plurality of second reinforcing bars extending in one direction are separated by a predetermined dimension in the crossing direction at the other end of the deck plate with the reinforcing bar truss forming the other lateral region excluding the one side region and the other side region. Reinforcing bar connecting step of connecting the second reinforcing bars to the middle height position between the upper and lower bar of the reinforcing bar truss located at the other end of the deck plate with the reinforcing bar truss while arranging them in a vertical state. When,
Each deck plate unit including the first and nth deck plate units in which the first and second reinforcing bars are connected to the reinforcing bar truss is carried into the layer where the concrete slab of the building is to be constructed by a predetermined lifting means. Reinforcing bars while arranging the 1st to nth deck plate units adjacent to each other in the crossing direction in the 1st to nth construction spaces between the PC beams facing the crossing direction intersecting with one direction of the building. The vicinity of both ends of the deck plate with truss is installed near the beam surface of the PC beam by a predetermined connecting means , and a plurality of slab reinforcing bars extending in one direction are provided on substantially the entire surface of the deck plate unit in a predetermined dimension in the crossing direction. The unit installation process of arranging the reinforcing bars on the upper end bars of the reinforcing bar truss in a separated state, and
By placing concrete on the upper surface of the first to nth deck plate units with a predetermined covering size and curing the concrete for a predetermined period, the first to nth constructions between the PC beams facing each other in the crossing direction are performed. One end and residual area and the other side area of the deck plate with reinforced truss forming the concrete slab in the space and forming one side area of the PC beam and the first deck plate unit. While constructing a beam integrated structure integrated with the PC beam formed from the first reinforcing reinforcing bar and the concrete arranged in one side area excluding the above, the other PC beam and the nth The second reinforcing bar and the concrete arranged in the other end and the residual area of the deck plate with the reinforcing bar truss forming the other side area of the deck plate unit and the other side area excluding one side area. A slab construction method comprising a beam-integrated structure construction step of constructing a beam-integrated structure formed from and integrated with the PC beam. In the reinforcing bar connecting step, claim 1 in which the reinforcing reinforcing bars are connected to the reinforcing bar truss of the deck plate with the reinforcing bar truss extending between the beam surface of the PC beam and a portion separated by a predetermined dimension in the crossing direction from the beam surface. Alternatively, the slab construction method according to claim 2. In the reinforcing bar connecting step, the reinforcing bars are connected to the reinforcing bar truss of the deck plate with the reinforcing bar truss in a state where the reinforcing bars are separated at substantially equal intervals in the crossing direction, and the reinforcing bars are arranged at substantially equal intervals in the crossing direction. Item 3. The slab construction method according to Item 3. In the reinforcing bar connecting step, the lifting bars that are separated from each other in the crossing direction and extend in one direction are connected to the reinforcing bar truss of the deck plate with the reinforcing bar truss, and in the lifting means, the lifting bars are connected. The slab construction method according to claim 3 or 4, wherein the deck plate unit is lifted by using the deck plate unit and the deck plate unit is carried into the layer where the concrete slab of the building is to be constructed. The slab construction method performs an end connection step of connecting both ends of the reinforcing reinforcing bars to anchor bolts or reinforcing bars extending from PC beams facing in one direction after the unit installation step or at the same time as the unit installation step. The slab construction method according to any one of claims 3 to 5, including. The deck plate with a reinforcing bar truss has a steel plate base having a predetermined area having both end edges extending in one direction and both side edges extending in an intersecting direction, and the reinforcing bar truss is separated upward from the reinforcing bar base in the crossing direction. While repeating vertical bending in the vertical direction between the upper end bar extending to the upper end bar, the lower end bar extending in the intersecting direction located between the iron plate base and the upper end bar, and the iron plate base and the upper end bar. The reinforcing bars formed from the lattice bars extending in the crossing direction, the lower portion of the lattice bars is welded and fixed to the iron plate base, and the reinforcing bars arranged at a predetermined dimension apart in the crossing direction are the upper end bars, the lower end bars, and the lattice. Reinforcing reinforcing bars that are connected to any of the reinforcing bars and are lined up at a predetermined dimension in the vertical direction are formed in at least the lower end bar and the lattice bar of the upper end bar, the lower end bar, and the lattice bar. The slab construction method according to any one of claims 1 to 6 to be connected.

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