KR102354464B1 - Multi-rib PC slab having welded wire mesh and method for manufacturing and construction of the multi-rib PC slab - Google Patents

Abstract

The present invention is to provide a multi-rib PC slab and a method for manufacturing and constructing a multi-rib PC slab to manufacture and construct a slab structure having excellent strength, particularly excellent shear strength, using a PC slab having a plurality of ribs. A multi-rib PC slab having a welded wire mesh according to the present invention includes a slab part in the shape of a flat plate; a plurality of ribs integrally formed at regular intervals on the bottom surface of the slab part; a plurality of shear wire meshes buried in each rib and arranged so that the upper end protrudes from the top surface of the slab part; and a horizontal wire mesh buried in the slab part and bound to the plurality of shear wire meshes. In the horizontal wire mesh, a plurality of binding rebars are coupled to a plurality of horizontal rebars on the outside of the shear wire meshes.

Description

Multi-rib PC slab having welded wire mesh and method for manufacturing and construction of the multi-rib PC slab

The present invention relates to a multi-rib PC slab having a welded wire mesh and a method for manufacturing and constructing a multi-rib PC slab, and more particularly, to a wire mesh automatically welded as shear reinforcement embedded in a rib part and exposed up to the slab part. Multi-ribbed PC slab with excellent shear strength is produced by using horizontal wire mesh to build a multi-ribbed PC slab with a welded wire mesh that allows for easy construction of multi-rib slabs by horizontally arranging the on-site reinforcement wire mesh and pouring concrete. It relates to a method of manufacturing and constructing a rib PC slab and a multi-rib PC slab.

In general, reinforced concrete structures consist of the main structural parts of columns, beams, and slabs, and the columns are mainly subjected to compression, but resist shear forces by arranging hoops.

Beams and slabs mainly behave as flexural materials and receive shear force at the same time and resist shear by arranging reinforcing bars in the vertical direction of the beam member or perpendicular to the cracks, and this is called shear reinforcing bars.

Unlike the main bars, these shear reinforcing bars have many strands and are placed more toward the end, and the number of shear reinforcing bars greatly affects the width of the worker, the processing cost of the reinforcing bar material, the accuracy of spacing, and workability when placing.

In particular, in the case of precast concrete (PC: Precast Concrete) slabs manufactured at the factory, depending on the number of ribs acting as beams, single tee with one rib, double tee with two ribs, triti with three, and multi rib with four or more can be classified as absent. It is a huge burden to process and place shear reinforcing bars on these ribs or beams and weave them one by one by hand.

In addition, according to the structural standards, such shear reinforcing bars are required to be sufficiently settled and to exhibit proof strength by wrapping the main reinforcing bars in the longitudinal direction with standard hooks or welding them. The ribbed slab used in the PC method has a narrow rib width, so it is difficult to wrap the main bars by processing shear reinforcing bars into hooks, so there are exceptions in the structural standards. However, in the case of a long rib, such as a deep double tee slab, it is difficult to apply this exception.

That is, the only way to solve everything by processing and arranging the shear reinforcement of such a beam is to weld the upper and lower parts of the shear reinforcement and mechanize each shear reinforcement. It is appropriate to use the existing wire mesh automatically welded at regular intervals as a horizontal bending slab reinforcing bar, but it is not appropriate to use it standing up as a vertical shear reinforcing bar.

1 is a partial perspective view showing a multi-rib PC slab according to the prior art.

The conventional multi-rib PC slab 10 is a double tee slab having a pair of ribs, and includes a main bar 20 horizontally disposed under each rib part, a horizontal reinforcing bar 30 disposed horizontally in the slab part, and , It includes a plurality of hook reinforcing bars 50 that are vertically arranged so that the lower end is coupled to surround the main bar 20 and the upper end bent in the width direction is exposed from the upper surface of the slab part.

In the horizontal reinforcing bar 30, a plurality of horizontal reinforcing bars 32 and a plurality of vertical reinforcing bars 34 are arranged at predetermined intervals, and may be coupled to each other by wire or the like.

The hook reinforcing bar 50 is a shear reinforcing bar in which the upper end is bent in the width direction and vertically exposed from the upper surface of the slab. The lower end of the hook reinforcing bar 50 is formed to surround the main reinforcing bar 20 and may be additionally coupled with a wire. The middle of the hook reinforcing bar 50 may be coupled to the horizontal reinforcing bar 30 by wire.

By the way, in order to manufacture the conventional multi-rib PC slab 10, it is necessary not only to connect the plurality of horizontal reinforcing bars 32 and the plurality of vertical reinforcing bars 34 to each other, but also to connect the plurality of hook reinforcing bars 50 to the main bars ( 20) and the horizontal reinforcing bar 30 are individually connected to each other.

So, the conventional multi-rib PC slab is very cumbersome to manufacture, and since the plurality of hook reinforcing bars 50 are not directly connected, the shear strength is also weak.

Registered Patent Publication No. 10-1220678 "Cross-section optimization rib PC slab"

The present invention provides a multi-rib PC slab and a method for manufacturing and constructing a multi-rib PC slab capable of manufacturing and constructing a slab structure having excellent strength, particularly a slab structure having excellent shear strength, using a PC slab having a plurality of ribs aim to do

Multi-rib PC slab having a welded wire mesh of the present invention for achieving the above object, a slab portion in the form of a flat plate; a plurality of ribs integrally formed on a lower surface of the slab at predetermined intervals; a plurality of shear wire meshes embedded in each rib part and disposed so that the upper end protrudes from the upper surface of the slab part; and a horizontal wire mesh embedded in the interior of the slab and bound to the plurality of shear wire meshes, wherein a plurality of binding reinforcing bars are coupled to the plurality of transverse reinforcing bars on the outside of the shear wire mesh in the horizontal wire mesh.

The shear wire mesh may include a plurality of shear reinforcing bars disposed vertically, and a plurality of horizontal reinforcing bars welded to one side of the plurality of shear reinforcing bars.

The horizontal reinforcing bar includes a lower anchoring reinforcing bar welded to one lower end of the plurality of shear reinforcing bars, a position fixing reinforcing bar welded to an upper side of the plurality of shear reinforcing bars and coupled to the horizontal wire mesh, and welding to one upper end of the plurality of shear reinforcing bars. It may include upper anchoring reinforcing bars to support the field reinforcement wire mesh.

The horizontal reinforcing bar may further include a rib abdominal reinforcing bar that is welded to one lower side of the plurality of shear reinforcing bars when the rib portion is high.

The position fixing muscle and the rib abdominal muscle have the same diameter (D1) as the shear reinforcement, the upper anchoring muscle has a larger diameter (D2) than the diameter (D1) of the shear reinforcement, and the lower anchoring muscle is the upper anchoring muscle It may have a diameter (D3) greater than the diameter (D2) of the root.

The plurality of binding reinforcing bars may be a binding wire mesh in which a plurality of vertical reinforcing bars and a plurality of horizontal reinforcing bars are welded.

The positioning muscle may be coupled to be supported on the upper surface of the horizontal wire mesh.

The positioning muscle may be coupled to support the horizontal wire mesh from the lower surface.

The shear wire mesh may be disposed to overlap each rib portion two by one.

A method of manufacturing and constructing a multi-rib PC slab according to an aspect of the present invention includes: arranging a horizontal wire mesh at a predetermined height using a temporary pedestal; binding the horizontal wire mesh vertically by sandwiching the shear wire mesh on both sides of the horizontal wire mesh; coupling a plurality of binding reinforcing bars to both edge portions of the horizontal wire mesh; manufacturing a multi-rib PC slab by installing the assembled horizontal wire mesh and shear wire mesh on the formwork and pouring concrete; Installing a field reinforcement wire mesh on top of the shear wire mesh; and pouring and curing concrete on the upper surface of the PC slab.

The shear wire mesh may include a plurality of shear reinforcing bars disposed vertically, and a plurality of horizontal reinforcing bars welded to one side of the plurality of shear reinforcing bars.

The horizontal reinforcing bar includes a lower anchoring reinforcing bar welded to one lower end of the plurality of shear reinforcing bars, a position fixing reinforcing bar welded to an upper side of the plurality of shear reinforcing bars and coupled to the horizontal wire mesh, and welding to one upper end of the plurality of shear reinforcing bars. It can be provided with a welded wire mesh, characterized in that it includes an upper anchoring bar to support the field reinforcement wire mesh.

The anchoring muscle has the same diameter (D1) as the shear reinforcement, the upper anchoring muscle has a larger diameter (D2) than the diameter (D1) of the shear reinforcement, and the lower anchoring muscle has the diameter (D2) of the upper anchoring muscle. ) may have a larger diameter (D3).

The position fixing muscles of the shear wire mesh may be supported by being seated on the horizontal wire mesh.

A method of manufacturing and constructing a multi-rib PC slab according to another aspect of the present invention comprises: arranging a plurality of shear wire meshes vertically on the ground; binding a horizontal wire mesh vertically to the plurality of shear wire meshes; coupling a plurality of binding reinforcing bars to both edge portions of the horizontal wire mesh; manufacturing a multi-rib PC slab by installing the assembled shear wire mesh and horizontal wire mesh on the formwork and pouring concrete; Installing a field reinforcement wire mesh on top of the shear wire mesh; and pouring and curing concrete on the upper surface of the PC slab.

The shear wire mesh may include a plurality of shear reinforcing bars disposed vertically, and a plurality of horizontal reinforcing bars welded to one side of the plurality of shear reinforcing bars.

The horizontal reinforcing bar includes a lower anchoring reinforcing bar welded to one lower end of the plurality of shear reinforcing bars, a position fixing reinforcing bar welded to an upper side of the plurality of shear reinforcing bars and coupled to the horizontal wire mesh, and welding to one upper end of the plurality of shear reinforcing bars. It may include upper anchoring reinforcing bars to support the field reinforcement wire mesh.

The anchoring muscle has the same diameter (D1) as the shear reinforcement, the upper anchoring muscle has a larger diameter (D2) than the diameter (D1) of the shear reinforcement, and the lower anchoring muscle has the diameter (D2) of the upper anchoring muscle. ) may have a larger diameter (D3).

The horizontal wire mesh may be supported by being seated on a position fixing muscle of the shear wire mesh.

According to the method for manufacturing and constructing a multi-rib PC slab and a multi-rib PC slab having a welded wire mesh according to the present invention, a slab structure having excellent strength, particularly a slab having excellent shear strength, using a PC slab having a plurality of ribs Able to construct and construct structures.

1 is a partial perspective view showing a multi-rib PC slab according to the prior art.
Figure 2 is a cross-sectional view showing the on-site casting using the multi-rib PC slab according to the first embodiment of the present invention.
3 is a cross-sectional view illustrating an on-site casting using a multi-rib PC slab according to a second embodiment of the present invention.
Figure 4 is a side view showing the shear wire mesh.
5 is a plan view showing that binding reinforcing bars are welded to both sides of the horizontal wire mesh.
6 is a plan view showing that the binding wire mesh is welded to both sides of the horizontal wire mesh.
Figure 7 is a cross-sectional view showing the installation of the field reinforcement wire mesh on the top of the shear wire mesh of the multi-rib PC slab according to the first embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a modified example in which two shear wire meshes overlap one rib portion in FIG. 7 .
9 is a cross-sectional view showing the installation of the field reinforcement wire mesh on the top of the shear wire mesh of the multi-rib PC slab according to the second embodiment of the present invention.
FIG. 10 is a cross-sectional view showing a modified example in which two shear wire meshes overlap one rib portion in FIG. 9 .
11 is a perspective view showing a temporary pedestal used for manufacturing a multi-rib PC slab according to the first embodiment of the present invention.
12 to 17 are views showing the manufacturing and construction process of the multi-rib PC slab according to the first embodiment of the present invention.
18 to 23 are views showing the manufacturing and construction process of the multi-rib PC slab according to the second embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present invention, terms such as 'comprising' or 'having' are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that in the accompanying drawings, the same components are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings.

Figure 2 is a cross-sectional view showing the on-site casting using the multi-rib PC slab according to the first embodiment of the present invention, Fig. 3 is the on-site casting construction using the multi-rib PC slab according to the second embodiment of the present invention It is a cross-sectional view showing one thing, FIG. 4 is a side view showing a shear wire mesh, and FIG. 5 is a plan view showing that binding reinforcing bars are welded to both sides of the horizontal wire mesh.

In the case of the first embodiment of FIG. 2 , the fixing muscle 136 is coupled to the horizontal wire mesh 140 and supported on the horizontal wire mesh 140 , and in the second embodiment of FIG. 3 , the fixing muscle 136 is coupled to the horizontal wire mesh 140 . ) is coupled to the bottom to support the horizontal wire mesh (140).

The multi-rib PC slab 100 of the present invention includes a slab part 150 in the form of a flat plate, a plurality of rib parts 160 integrally formed on the lower surface of the slab part at a predetermined interval, each rib part is embedded in the interior and the upper part is a slab. It includes a plurality of shear wire meshes 110 disposed to protrude from the upper surface of the part, and a horizontal wire mesh 140 embedded in the interior of the slab part and bound to the plurality of shear wire meshes.

In the PC slab 100 , two or more rib parts 160 may be integrally formed on the lower surface of the slab part 150 having a predetermined thickness and formed in a flat plate shape. Although the figure shows that a pair of rib parts 160 are formed, the present invention can be applied to a tri-T slab having three rib parts or a multi-rib slab having four or more rib parts. have.

The slab part 150 may be formed in a rectangular shape when viewed from above. The rib portion 160 may be formed in a shape close to an elongated rectangular parallelepiped. A corner portion where the rib portion 160 is connected to the slab portion 150 may be formed to be rounded. In addition, as shown in FIGS. 2 and 3 , both sides of the rib part 160 are inclined so that the upper width is greater than the lower width, and the cross section thereof may be formed in a trapezoidal shape.

The shear wire mesh 110 and the horizontal wire mesh 140 may be embedded in the PC slab 100 . The shear wire mesh 110 may be disposed in the center of the width direction of the rib portion 160 and the upper end may be exposed at the upper end of the slab portion 150 . The horizontal wire mesh 140 may be all buried in the slab part 150 and disposed to vertically cross the shear wire mesh 110 .

The shear wire mesh 110 may include a plurality of shear reinforcing bars 120 disposed perpendicular to the ground, and a plurality of horizontal reinforcing bars 130 welded to one side of the plurality of shear reinforcing bars.

The shear wire mesh 110 may include a plurality of shear reinforcing bars 120 arranged at predetermined intervals, and a plurality of horizontal reinforcing bars 130 disposed at a predetermined height on one side of each shear reinforcing bar 120 and welded. The shear reinforcing bars 120 and the horizontal reinforcing bars 130 are automatically welded by an automatic welding device, and may be manufactured as a shear wire mesh 110 of a rectangular outline having a predetermined size.

4, the horizontal reinforcing bar 130 is a lower anchoring reinforcing bar 132 welded to one lower end of the plurality of shear reinforcing bars 120, and a horizontal wire mesh ( It may include a position fixator 136 coupled to 140 and an upper anchorage muscle 138 welded to one upper end of the plurality of shear reinforcing bars 120 to support the on-site reinforcement wire mesh 170 .

The lower anchoring reinforcing bar 132 may be welded to the lower end of one side of the plurality of shear reinforcing bars 120 to fix the shear wire mesh 110 to the rib portion 160 of the PC slab and serve as an auxiliary of the main reinforcing bars.

The positioning reinforcing bars 136 may be welded to the upper portion of one side of the plurality of shear reinforcing bars 120 and coupled to the horizontal wire mesh 140 . In the first embodiment of FIG. 2 , the anchoring muscle 136 is coupled to the horizontal wire mesh 140 and supported on the horizontal wire mesh 140 , and in the second embodiment of FIG. 3 , the anchoring muscle 136 is the horizontal wire mesh 140 . ) is coupled to the bottom to support the horizontal wire mesh (140).

The horizontal wire mesh 140 may include a plurality of transverse reinforcing bars 142 arranged at predetermined intervals and a plurality of vertical reinforcing bars 144 welded to be orthogonal to an upper surface of the plurality of transverse reinforcing bars. A plurality of horizontal reinforcing bars 142 and a plurality of vertical reinforcing bars 144 are automatically welded to prepare and use the horizontal wire mesh 140 in advance.

As shown in FIG. 5 , a plurality of binding reinforcing bars 146 may be coupled to a plurality of transverse reinforcing bars 142 on the outside of the shearing wire mesh 110 in the horizontal wire mesh 140 . That is, in the plurality of transverse reinforcing bars 142 , the vertical reinforcing bars 144 are not welded to the outer both ends of the portion where the shear wire mesh 110 is disposed, and after the shear wire mesh 110 and the horizontal wire mesh 140 are combined, a plurality of The binding reinforcing bar 146 may be arranged to bind. In the pre-fabricated horizontal wire mesh 140 , the plurality of binding reinforcing bars 146 may be coupled to each other by binding wires, etc., rather than being welded to the plurality of horizontal reinforcing bars 142 .

The upper anchoring reinforcing bar 138 may be welded to the top of one side of the plurality of shear reinforcing bars 120 in order to support the on-site reinforcement wire mesh 170 in the field.

The on-site reinforcement wire mesh 170 may also include a plurality of transverse reinforcing bars 172 arranged at predetermined intervals, and a plurality of vertical reinforcing bars 174 welded to be orthogonal to the upper side of the plurality of transverse reinforcing bars. By automatically welding a plurality of horizontal reinforcing bars 172 and a plurality of vertical reinforcing bars 174, the field reinforcement wire mesh 170 can be prepared and used in advance.

The horizontal reinforcing bar 130 may further include a rib abdominal reinforcing bar 134 welded to one lower side of the plurality of shear reinforcing bars 120 when the rib portion 160 is high. The rib abdominal region 134 may reinforce the strength of the rib portion 160 when the height of the rib portion 160 is long.

The fixed position muscle 136 and the rib abdominal muscle 134 have the same diameter (D1) as the shear reinforcing bar 120, and the upper anchoring muscle 138 has a larger diameter (D2) than the diameter (D1) of the shear reinforcing bar 120 , and the lower setter muscle 132 may have a larger diameter D3 than the diameter D2 of the upper setter muscle 138 .

For example, the shear reinforcement 120, the rib abdominal muscle 134, and the positioning muscle 136 are formed to have a diameter (D1) of about 10 mm, and the upper anchoring muscle 138 has a diameter (D2) of about 13 mm. and the lower anchorage muscle 132 may be formed to have a diameter D3 of about 16 mm.

The lower anchoring reinforcing bar 132 anchors the shear wire mesh 110 inside the rib portion 160 of the PC slab and serves as an auxiliary of the main reinforcing bars, so it can be composed of the thickest reinforcing bars.

The upper anchoring reinforcing bar 138 is exposed to the upper surface of the slab part 150 of the PC slab and supports the on-site reinforcement wire mesh 170, so it can be composed of reinforcing bars having a medium diameter.

The positioning reinforcing bar 136 is coupled to the horizontal wire mesh 140 embedded in the slab part 150 of the PC slab, and concrete is poured and manufactured in advance. configurable.

On the other hand, as shown in FIG. 6, the plurality of binding reinforcing bars may be composed of a binding wire mesh 148 in which a plurality of vertical reinforcing bars and a plurality of horizontal reinforcing bars are welded. In this case, at both ends of the horizontal wire mesh 140 , the horizontal reinforcing bars 142 of the horizontal wire mesh 140 and the transverse reinforcing bars of the binding wire mesh 148 may overlap each other, contact or be adjacently bound.

7 is a cross-sectional view showing that the field reinforcement wire mesh is installed on the top of the shear wire mesh of the multi-rib PC slab according to the first embodiment of the present invention, and FIG. It is a cross-sectional view showing an arranged modified example, and FIG. 9 is a cross-sectional view showing that the field reinforcement wire mesh is installed on the top of the shear wire mesh of the multi-rib PC slab according to the second embodiment of the present invention, and FIG. 10 is a single rib in FIG. It is a cross-sectional view showing a modified example in which two shear wire meshes are arranged to overlap each other.

As shown in FIG. 7 , the positioning muscle 136 may be coupled to be supported on the upper surface of the horizontal wire mesh 140 . In the case of the first embodiment, since the horizontal wire mesh 140 is installed first and the shear wire mesh 110 is seated, the position fixing reinforcing bar 136 may be supported on the upper surface of the horizontal reinforcing bar 144 of the horizontal wire mesh 140 .

As shown in FIG. 8 , the shear wire mesh 110 may be disposed to overlap each rib part 160 by two. The two shear wire meshes 110 disposed to overlap have superior strength compared to the case where there is only one shear wire mesh.

On the other hand, the shear wire mesh 110, when viewed from the side, one shear wire mesh 110 as in FIG. 7 is disposed in the middle portion in the longitudinal direction, and a pair of overlapping shears as shown in FIG. 8 at both ends of the shear wire mesh 110 Wire mesh 110 may be used. In general, since it must be able to withstand a shear force of more than twice that of the middle part at both ends of the beam, it is possible to install one more overlapping shear wire mesh 110 at both ends of the beam. That is, the shear wire mesh 110 is disposed so that one is disposed in the middle portion and two overlapping at both ends, it is possible to efficiently support the shear force applied to the rib portion 160 .

As shown in Figure 9, the position fixing muscle 136 may be coupled to support the horizontal wire mesh 140 from the bottom. In the case of the second embodiment, since the shear wire mesh 110 is first installed and the horizontal wire mesh 140 is seated, the positioning reinforcing bar 136 can support the lower surface of the horizontal reinforcing bar 144 of the horizontal wire mesh 140 .

As shown in FIG. 10 , the shear wire mesh 110 may be disposed to overlap each rib part 160 by two. The two shear wire meshes 110 disposed to overlap have superior strength compared to the case where there is only one shear wire mesh.

On the other hand, the shear wire mesh 110, when viewed from the side, one shear wire mesh 110 as in FIG. 9 is disposed in the middle portion in the longitudinal direction, and a pair of overlapping shears as shown in FIG. 10 at both ends of the shear wire mesh 110 Wire mesh 110 may be used. In general, since it must be able to withstand a shear force of more than twice that of the middle part at both ends of the beam, it is possible to install one more overlapping shear wire mesh 110 at both ends of the beam. That is, the shear wire mesh 110 is disposed so that one is disposed in the middle portion and two overlapping at both ends, it is possible to efficiently support the shear force applied to the rib portion 160 .

11 is a perspective view showing a temporary pedestal used for manufacturing the multi-rib PC slab according to the first embodiment of the present invention, and FIGS. 12 to 17 are the manufacturing and A drawing showing the construction process.

The manufacturing of the multi-rib PC slab according to the first embodiment of the present invention and a slab construction method using the same will be described with reference to FIGS. 11 to 17 .

The temporary support 200 shown in FIG. 11 is for arranging the horizontal wire mesh 140 at a predetermined height from the ground. In order to support the rectangular horizontal wire mesh 140, the temporary pedestal 200 may be formed at a predetermined height and may have flat plate-shaped supports at both upper ends. The height from the lower surface of the temporary support 200 to the upper surface of the support corresponds to the height from the bottom of the PC slab to the lower surface of the horizontal wire mesh 140 .

First, as shown in FIG. 12 , the horizontal wire mesh 140 is arranged at a predetermined height using the temporary support 200 . At this time, the horizontal wire mesh 140 is a semi-finished product in which a plurality of horizontal reinforcing bars 142 and a plurality of vertical reinforcing bars 144 are welded, and there are no vertical reinforcing bars 144 at both ends of the horizontal wire mesh 140 .

Next, as shown in FIG. 13 , a pair of shear wire meshes 110 are sandwiched from both sides of the horizontal wire mesh 140 and vertically bound. Then, the position fixing reinforcing bars 136 of the shear wire mesh 110 are supported by the horizontal reinforcing bars 142 of the horizontal wire mesh 140 . It can be fixed so as not to move by binding between the contact portions of the horizontal wire mesh 140 and the shear wire mesh 110 with a binding wire.

Next, as shown in FIG. 14 , a plurality of binding reinforcing bars 146 are coupled to both edge portions of the horizontal wire mesh 140 . The binding reinforcing bar 146 has the same diameter as the vertical reinforcing bar 144 of the horizontal wire mesh 140, but is not pre-welded like the vertical reinforcing bar 144, and can be fixed by binding to the horizontal reinforcing bar 142 with a binding wire. have.

Next, as shown in FIG. 15 , the assembled horizontal wire mesh 140 and shear wire mesh 110 are installed in the formwork, and the multi-rib PC slab 100 is manufactured by pouring concrete. Of course, except for the temporary support 200, the assembled horizontal wire mesh 140 and shear wire mesh 110 are installed in the formwork. After pouring and curing the concrete to the height at which the upper end of the shear wire mesh 110 is exposed, the mold is separated to complete the multi-rib PC slab 100 as shown in FIG. 15 .

Next, as shown in FIG. 16 , the manufactured PC slab 100 is installed in the field and the field reinforcement wire mesh 170 is installed on the top of the shear wire mesh 110 . At this time, the transverse reinforcement 172 of the field reinforcement wire mesh 170 may be supported by the upper anchoring reinforcement 138 of the shear wire mesh 110 . The transverse reinforcing bar 172 and the upper anchoring reinforcing bar 138 may be bound and fixed by the binding reinforcing bar.

Finally, as shown in FIG. 17, a formwork is installed around the field reinforcement wire mesh 170 on the PC slab 100, concrete is poured on the upper surface of the PC slab 100, cured, and then the formwork is separated. do. Then, the construction of the reinforced concrete slab in the field using the PC slab 100 according to the present invention is completed.

18 to 23 are views showing the manufacturing and construction process of the multi-rib PC slab according to the second embodiment of the present invention.

A manufacturing method of a multi-rib PC slab according to a second embodiment of the present invention and a slab construction method using the same will be described with reference to FIGS. 18 to 23 .

First, as shown in FIG. 18 , a plurality of shear wire meshes 110 are vertically placed on the ground. A plurality of supports (not shown) may be used to maintain the plurality of shear wire meshes 110 vertically arranged on the ground. At this time, the plurality of shear wire mesh 110 is a semi-finished product in which a plurality of shear reinforcing bars 120 and a plurality of horizontal reinforcing bars 130 are welded. No, if the height of the rib portion 160 is large, the rib abdominal region 134 is also welded together.

Next, as shown in FIG. 19 , the horizontal wire mesh 140 is vertically inserted into the plurality of shear wire meshes 110 and bound. At this time, the horizontal wire mesh 140 is a semi-finished product in which a plurality of horizontal reinforcing bars 142 and a plurality of vertical reinforcing bars 144 are welded, and there are no vertical reinforcing bars 144 at both ends of the horizontal wire mesh 140 . Then, the horizontal reinforcing bars 142 of the horizontal wire mesh 140 are supported on the position fixing reinforcing bars 136 of the shear wire mesh 110 . It can be fixed so as not to move by binding between the contact portions of the horizontal wire mesh 140 and the shear wire mesh 110 with a binding wire.

Next, as shown in FIG. 20 , a plurality of binding reinforcing bars 146 are coupled to both edge portions of the horizontal wire mesh 140 . The binding reinforcing bar 146 has the same diameter as the vertical reinforcing bar 144 of the horizontal wire mesh 140, but is not pre-welded like the vertical reinforcing bar 144, and can be fixed by binding to the horizontal reinforcing bar 142 with a binding wire. have.

Next, as shown in FIG. 21 , the assembled shear wire mesh 110 and the horizontal wire mesh 140 are installed in the formwork, and the multi-rib PC slab 100 is manufactured by pouring concrete. After pouring and curing the concrete to the height at which the upper end of the shear wire mesh 110 is exposed, the mold is separated to complete the multi-rib PC slab 100 as shown in FIG. 21 .

Next, as shown in FIG. 22 , the manufactured PC slab 100 is installed in the field and the field reinforcement wire mesh 170 is installed on the top of the shear wire mesh 110 . At this time, the transverse reinforcement 172 of the field reinforcement wire mesh 170 may be supported by the upper anchoring reinforcement 138 of the shear wire mesh 110 . The transverse reinforcing bar 172 and the upper anchoring reinforcing bar 138 may be bound and fixed by the binding reinforcing bar.

Finally, as shown in FIG. 23, a formwork is installed around the on-site reinforcement wire mesh 170 on the PC slab 100, concrete is poured and cured on the upper surface of the PC slab 100, and then the formwork is separated. do. Then, the construction of the reinforced concrete slab in the field using the PC slab 100 according to the present invention is completed.

In the above, an embodiment of the present invention has been described, but those of ordinary skill in the art can add, change, delete, or add components within the scope that does not depart from the spirit of the present invention described in the claims. Various modifications and changes of the present invention will be possible by this, and this will also be included within the scope of the present invention.

10: Multi-rib PC slab (prior art)
20: main bar 30: horizontal reinforcing bar
32: horizontal reinforcing bar 34: vertical reinforcing bar
50: hook reinforcing bar
100: multi-rib PC slab (invention)
110: shear wire mesh 120: shear reinforcement
130: horizontal reinforcing bar 132: lower anchoring bar
134: rib abdominal muscle 136: position fixator muscle
138: upper anchor 140: horizontal wire mesh
142: horizontal reinforcing bar 144: vertical reinforcing bar
146: binding reinforcing bar 148: binding wire mesh
150: slab part 160: rib part
170: field reinforcement wire mesh 172: transverse reinforcement
174: vertical reinforcing bar 180: cast-in-place concrete
200: temporary support

Claims (19)

a slab portion in the form of a flat plate;
a plurality of ribs integrally formed on a lower surface of the slab at predetermined intervals;
a plurality of shear wire meshes embedded in each rib part and disposed so that the upper end protrudes from the upper surface of the slab part; and
Horizontal reinforcing bars and vertical reinforcing bars are pre-fabricated by welding, embedded in the interior of the slab, and include a horizontal wire mesh bound to the plurality of shear wire meshes,
A plurality of binding reinforcing bars are coupled to a plurality of transverse reinforcing bars on the outside of the shear wire mesh in the horizontal wire mesh,
The shear wire mesh includes a plurality of shear reinforcing bars disposed vertically, and a plurality of horizontal reinforcing bars welded to one side of the plurality of shear reinforcing bars, and is manufactured in advance,
The horizontal reinforcing bar includes a lower anchoring reinforcing bar welded to one side of the lower end of the plurality of shear reinforcing bars, a rib abdominal reinforcing bar welded to one lower side of the plurality of shear reinforcing bars when the rib portion is high, and welding to an upper side of the plurality of shear reinforcing bars It includes a position fixing reinforcing bar coupled to the horizontal wire mesh, and an upper anchoring reinforcing bar welded to one side of the upper end of the plurality of shear reinforcing bars to support the pre-fabricated on-site reinforcement wire mesh by welding horizontal reinforcing bars and vertical reinforcing bars,
The multi-rib PC slab having a welded wire mesh, characterized in that the position fixing muscle is coupled to be supported on the upper surface of the horizontal wire mesh or coupled to support the horizontal wire mesh from the lower surface. delete delete delete According to claim 1,
The position fixing muscle and the rib abdominal muscle have the same diameter (D1) as the shear reinforcement,
The upper anchoring muscle has a larger diameter (D2) than the diameter (D1) of the shear reinforcement,
The multi-rib PC slab having a welded wire mesh, characterized in that the lower anchorage has a larger diameter (D3) than the diameter (D2) of the upper anchorage. According to claim 1,
The plurality of binding reinforcing bars is a multi-rib PC slab having a welded wire mesh, characterized in that it is a binding wire mesh in which a plurality of vertical reinforcing bars and a plurality of horizontal reinforcing bars are welded. delete delete According to claim 1,
The shear wire mesh is a multi-rib PC slab having a welded wire mesh, characterized in that the two overlapping each rib portion. arranging a horizontal wire mesh prepared in advance by welding horizontal reinforcing bars and vertical reinforcing bars using a temporary pedestal to a predetermined height;
The shear reinforcement and the horizontal reinforcement are welded on both sides of the horizontal wire mesh, vertically binding the shear wire mesh by inserting a pre-fabricated wire mesh;
coupling a plurality of binding reinforcing bars to both edge portions of the horizontal wire mesh;
manufacturing a multi-rib PC slab by installing the assembled horizontal wire mesh and shear wire mesh on the formwork and pouring concrete;
Installing a field reinforcement wire mesh on top of the shear wire mesh; and
Containing the step of pouring and curing the concrete on the upper surface of the PC slab,
The shear wire mesh includes a plurality of shear reinforcing bars disposed vertically, and a plurality of horizontal reinforcing bars welded to one side of the plurality of shear reinforcing bars,
The horizontal reinforcing bar includes a lower anchoring reinforcing bar welded to one lower end of the plurality of shear reinforcing bars, a rib abdominal reinforcing bar welded to one lower side of the plurality of shear reinforcing bars, and welding to an upper side of the plurality of shear reinforcing bars to the horizontal wire mesh It includes a position fixing reinforcing bar to be combined, and an upper anchoring reinforcing bar that is welded to one side of the upper end of the plurality of shear reinforcing bars and supports a pre-fabricated on-site reinforcement wire mesh by welding horizontal reinforcing bars and vertical reinforcing bars,
The method of manufacturing and constructing a multi-rib PC slab having a welded wire mesh, characterized in that the position fixing reinforcing the shear wire mesh is supported by being seated on the horizontal wire mesh. delete delete 11. The method of claim 10,
The position fixing muscle has the same diameter (D1) as the shear reinforcement,
The upper anchoring muscle has a larger diameter (D2) than the diameter (D1) of the shear reinforcement,
The method of manufacturing and constructing a multi-rib PC slab having a welded wire mesh, characterized in that the lower anchorage has a larger diameter (D3) than the diameter (D2) of the upper anchorage. delete A step of arranging a plurality of shear reinforcing bars and horizontal reinforcing bars are welded in advance by standing vertically on the ground;
connecting horizontal reinforcing bars and vertical reinforcing bars to the plurality of shear wire meshes by vertically inserting a pre-fabricated horizontal wire mesh;
coupling a plurality of binding reinforcing bars to both edge portions of the horizontal wire mesh;
manufacturing a multi-rib PC slab by installing the assembled shear wire mesh and horizontal wire mesh on the formwork and pouring concrete;
Installing a pre-fabricated on-site reinforcement wire mesh by welding horizontal reinforcing bars and vertical reinforcing bars on the upper end of the shear wire mesh; and
Including the step of pouring and curing cast-in-place concrete on the upper surface of the PC slab,
The shear wire mesh includes a plurality of shear reinforcing bars disposed vertically, and a plurality of horizontal reinforcing bars welded to one side of the plurality of shear reinforcing bars,
The horizontal reinforcing bar includes a lower anchoring reinforcing bar welded to one lower end of the plurality of shear reinforcing bars, a rib abdominal reinforcing bar welded to one lower side of the plurality of shear reinforcing bars, and welding to an upper side of the plurality of shear reinforcing bars to the horizontal wire mesh It includes a fixed position fixed reinforcing bar to be coupled, and an upper anchoring reinforcing bar that is welded to one side of the upper end of the plurality of shear reinforcing bars to support the field reinforcement wire mesh,
The horizontal wire mesh is a method of manufacturing and constructing a multi-rib PC slab having a welded wire mesh, characterized in that it is supported by being seated on a position fixing root of the shear wire mesh. delete delete 16. The method of claim 15,
The position fixing muscle has the same diameter (D1) as the shear reinforcement,
The upper anchoring muscle has a larger diameter (D2) than the diameter (D1) of the shear reinforcement,
The method of manufacturing and constructing a multi-rib PC slab having a welded wire mesh, characterized in that the lower anchorage has a larger diameter (D3) than the diameter (D2) of the upper anchorage. delete

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