JPH0291337A - Concrete structure frame - Google Patents

Abstract

PURPOSE:To stabilize quality and improve workability by putting a number of PC blocks, T-shaped, L-shaped, etc., inserting column main bars, installing beam main bars and beam moulds between them, and placing concrete. CONSTITUTION:A number of PC blocks 3, T-shaped, L-shaped, I-shaped, etc., each having a thick protrusion 6 in the direction of beams, are put together vertically, inserting column main bars 10. Beam main bars 11 are then installed and fixed between these PC blocks 9 disposed apart from each other for forming self-standing columns 4 at a proper interval. End parts of beam moulds 14 are installed on the side surface of the thick protrusions 6, concrete 17 is placed, and the self-standing columns 4 are connected and integrated with each other by site installing beams 5. Advantages of both of PC and site construction can thus be achieved by applying both of them.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a concrete structural frame that can be widely used in low-rise to ultra-high-rise buildings such as buildings and factories.

[Prior Art] Conventionally, for concrete structures such as PC or SRC construction, it has been known to use PC (precast concrete) construction in which concrete members such as columns are manufactured in advance at a factory and then transported to the construction site and assembled. There is. Compared to the on-site pouring method, this PC construction has the advantage of stabilizing the quality of concrete components through on-site management, mechanizing the work, and simplifying and speeding up on-site work.

[Problems to be solved by the invention] However, on the other hand, for example, processing of a panel zone for joining a PC column and a PC beam, or joining a PC beam to a PC slab board installed on the upper edge of the PC beam, etc. Concrete pouring work is carried out on-site, which ultimately requires a certain amount of curing time.

On the other hand, PC! 11! Some items are not easy to transport due to their weight, and in particular, relatively long and large parts such as beams are complicated and transportation costs inevitably increase. If the maximum stress occurs during lifting or transportation for shipping and delivery to the site, strength that takes into account this is also required.

The present invention has been made in view of the problems of conventional concrete structure frames, and uses both a PC structure and a cast-in-place structure, and shortens the length of the PC structure to further facilitate transportation. The concrete part has a unique feature at the joint with the PC structure part mentioned above, and is a synergistic combination of PC and field casting, which makes it possible to form a strong structural frame that integrates columns and beams while simplifying and speeding up the formwork installation work. The objective is to provide a concrete structural frame with the following advantages:

[Means for Solving the Problems] The present invention has been completed in accordance with the above object, and the pillar is made of PC blocks, and for example, several or more PC blocks are inserted through the main pillar and placed 81 above and below to form an integral structure. While forming a column,
After constructing and fixing the main beam reinforcement between these four pillars to ensure its independence, the end of the beam formwork is attached to the side of the thick inner protrusion provided in the direction of the beam material of the PC block, and concrete is poured. established,
A concrete structure frame is formed by connecting and integrating the above-mentioned self-supporting columns with beams cast on-site.In other words, the present invention provides a single-shaped, L-shaped, or single-shaped structure with thick protrusions in the direction of the beams. A plurality or large number of PC blocks are stacked one above the other by passing through the main reinforcement of the column, and the stacking P blocks are spaced apart from each other.
While the main reinforcements of the beams between the CC blocks are erected and fixed to form free-standing columns at appropriate intervals, the ends of the beam formwork are attached to the sides of the thick-walled protrusions, concrete is poured, and each free-standing column is cast on-site. The gist is a concrete structural frame that is characterized by being connected and integrated.

In the present invention, the beam direction is used to include both the beam installation direction and the girder installation direction.

[Function] As a result of the above, 1. According to the concrete structure frame of the present invention, columns can be manufactured in a factory as partial-length PC blocks and transported.

At the construction site, main reinforcement bars are inserted and stacked to form columns, and beam main reinforcements are erected and fixed between such stacked columns placed at appropriate distances on a slab, for example, to form a beam. Having ensured the independence of the columns beforehand, it is possible to position and place the beam formwork between the self-supporting columns by attaching the end to the side surface of the thick-walled protrusion of the above-mentioned PC block, By pouring concrete on this, each of the above-mentioned free-standing columns will be firmly connected and integrated using beams cast on site.

[Example] Hereinafter, embodiments will be described with reference to the drawings.

First of all, Embodiment 1 shown in FIGS. 1 to 7 is a concrete structure frame of the present invention. In this example, in a concrete structure building 2, which is, for example, a medium to low-rise building, PC blocks 3...(3a...3b) ...) is placed a on the free-standing column 4
... A beam 5 ... is erected in between by casting on site.

The PC block 3... has a thick protrusion 6... in the direction of the beam material, and in one example, the protrusion 6.6 as shown in FIG.
A flat square-shaped block 3a having in two orthogonal directions
As shown in FIG. 3, a T-shaped block 3b in plan view having protrusions in two directions of inversion and in a direction perpendicular thereto is used.

Here, the dimensions of each part of the PC block 3... can of course be designed in various ways;
m, and the protruding lengths of the thick protrusions 6 are also approximately the same (for example, in the case of a T-shaped block 3b, the protrusions in two reverse directions'
a*6 each a is 60 cm, and the protrusions 6b perpendicular to these are 90 cm, etc.), while the thickness of the linear protrusions 6... is approximately 20 cm for a 2-story building, and for a 5-story building. It can be designed according to the floor level and other conditions, such as about 30 cm for a 14-story building and 50 cm for a 14-story building.

The PC block 3 of this example has a sheath 7 built in through the upper and lower surfaces, and reinforcing bars 8 are embedded in advance in the direction of the beam material, with the ends protruding from the thick protrusion. A reinforced steel bar (see Figures 3 and 4) and a steel bar without this reinforcing bar are used.

As shown in FIG. 1, these PC blocks 3... are L-shaped blocks 3a-... located at the four corners of the building 2 of this example, which has a rectangular planar shape, and the PC blocks 3a--... A T-shaped block 3 b-... is placed at the middle position on the back surface, and three blocks are stacked at each position on the slab as shown in Fig. 2 to form a product NP which is a pillar for one floor.
C blocks 9... are arranged at appropriate intervals.

The following is a step-by-step explanation of the construction sequence. From the stacked PC blocks on the lower floor, the main column reinforcements protrude up to the middle height between the upper and lower slabs (for example, about the floor height), and the protruding ends of the main column reinforcements The next column main reinforcement lO... will be welded on-site and similarly extended to the middle of the upper floor. Then, each PC block 3... connects this column main reinforcement 10-... with a sheath 7 in this example.
While inserting them into ..., they are successively hung and stacked using a crane. At this time, if necessary, the PC block 3 of each stage
...For example, mortar for adhesion can be laid between them. Further, after laminating one layer of PC blocks 3..., the inside of the sheath 7... is grouted.

Note that the first PC block may be installed, for example, on a solid foundation, and in this example, each floor P consisting of three such
The upper one of C block 3 (height 60cm in this example)
m to about 80 cm) are equipped with the reinforcing bars 8 in the beam direction, and the lower two (each about 105 cm in height in this example) are omitted.

Next, the main beam reinforcements 11 are erected and fixed between the stacked PC blocks 9, which are columns formed in this manner and arranged at appropriate intervals on the slab (see Fig. 5). In this example, each of the reinforcing bars 8 protruding from the thick protrusion of the upper PC block is fixed at the site by, for example, gas pressure welding or enclosed welding.
Fixing part 12), as a result of which the spaced stacks P
C blocks 9 are connected by beam main reinforcements 10 to form self-supporting columns 4. In addition, 13 in Figure 1 is a stirrup that is hooked onto the main beam reinforcement.

Furthermore, a beam formwork 14 is arranged between each of the snow blocks 9, which are the columns, and in this example, the formwork is placed on both sides of the thick protrusion 6 of the PC block 3 located at the upper stage. Weir plate 15.
15 (note that the fixing means for the weir plate can be freely used, such as by pinching the thick protrusion from both sides with metal objects), and a bottom plate 16, and supports (not shown) are provided as necessary. Deploy.

Then, concrete 17 is poured into the formwork 14 to form the beam 5, and each self-supporting column 4+7 is connected to the on-site cast beam 5...
・Connect and integrate to form a concrete structural frame l.

In addition, in Figures 1 and 2, the formwork 14 is shown only in one part of each beam 5 section and the others are omitted, but of course, formwork is constructed on all the beam parts of the relevant floor and a series of Normally, one level of concrete is poured during the work. In addition, in this example, the weir plate 15°15 of the beam formwork 14 is attached directly to the side surface of the thick protrusion 6 of the PC block, so the wall thickness of the protrusion 6 and the beam width match, and the beam 5 is formed continuously with respect to the self-supporting column 4. however,
Of course, it is possible to change the cross-sectional shape of both by changing the shape of the weir plate, or by attaching it to the thick protrusion of the PC block via an intermediary.

In addition, in this example, before pouring concrete into the formwork 14, as shown in FIG. The PC slab plates 18 and the beams 5 are integrally fixed, and their top surfaces are aligned to form a flat slab surface 19. As a result, in Building 2 of this example, a strong concrete structure is formed in which only the beams are cast in place.

Next, in the embodiment shown in FIG. 8, a concrete structure frame 1 of the present invention is installed in a building 2 which is a medium-to-high-rise residential building, and the PC blocks 3a-
-3b-... is used, but each has its protrusion 6...
・There is a relatively large difference in the wall thickness depending on the direction.
Projection 6 a- along the stacking direction (long side direction of the building)
The wall thickness of the protrusion 6b along the vertical direction (the short side direction of the building) is about 20 cm, and the inner wall 21-... that partitions each house 20... has a wall thickness of about 60 cm. It is made to match the wall thickness or the beam width of a small beam (not shown).

Also, 22 in rjII is a hoop.

Note that the space between the inner wall and the pillars shown at 23-... in Figure 1.

During construction, panels 24.24 will be attached from both sides and the inner 112
1 is prevented from falling and can be removed if the independence of the inner wall is ensured by forming the beam. In addition, 25 in FIG. 1 is an opening (not shown) such as a sash, and 26 is an entrance/exit of each door.

On the other hand, the embodiment shown in FIG. 9 is one in which a concrete structure frame l of the present invention is provided in a building 2 which is a skyscraper, and like the embodiment described above, Pc blocks 3a-, 3b=, and a substantially ■-shaped Pc block 3C having thick protrusions only in two reverse directions.
...is placed. In Figure 1, 19 is the slab surface of an arbitrary floor, 24 is a wall opening where the sash etc. are not shown, and 27
is the central elevator space. Although not shown in the drawings, each of the Pc blocks 3a to 3c of this embodiment has a built-in sheath through which the main reinforcement of the column passes, and a hoop is hung over the sheath as necessary.

Also, in the building of the embodiment shown in FIGS. 8 and 9, the PC slab board 18 is built into the beam formwork in a manner similar to the previous embodiment, and only the beams are cast in place to form a strong concrete structure. ing. others.

Items common to each embodiment are designated by the same numbers in the drawings, and a portion of the explanation will be omitted.

On the other hand, although not shown, in addition to the above-mentioned cross-shaped, 1-shaped, and 1-shaped Pc blocks, a cross-shaped one can be arranged, for example, at the intersection of the beams. The number is not limited to the illustrated example depending on the arrangement of the beams.

Furthermore, if a thermocon or the like is used as the material of the Pc block, the insulation effect will be high and it will be suitable for cold regions. Of course, the number of stacked Pc blocks is two or more and can be freely determined depending on the building.

In addition, the beam main reinforcements can be fixed to the stacked Pc blocks by known connection means such as the above-mentioned threaded joints or sleeve joints, or by Pc
Various fixing means can be used, such as welding to a steel frame embedded in the block with a portion protruding from the block.

Although the embodiments are configured as described above, the present invention can be applied to thick-walled protrusions, Pc blocks, column main reinforcements, snow-covered Pc blocks, beam main reinforcements, self-supporting columns, beam formwork, concrete, cast-in-place, as long as it does not contradict the gist of the invention. It goes without saying that the specific shape of the beams, dimensions of the structure, material, number of members, arrangement, relationships among these, order of construction, etc. can be changed in various ways and are not limited to the above embodiments.

[Effects of the Invention] The concrete structure frame of the present invention is constructed by inserting a plurality of Pc blocks, such as one-shaped, L-shaped, or one-shaped Pc blocks each having a thick protrusion in the beam direction, through the main reinforcement of the column. Since many PC blocks are stacked one above the other, they are shorter and relatively lighter than integrally molded PC columns, which improves handling and loading efficiency during transportation or delivery to the site. , these Pc blocks can form an integral column body of a required height by passing through the column main reinforcement and stacking them.

In addition, while main beam reinforcements are erected and fixed between such laminated APC blocks placed apart from each other to form self-supporting columns at appropriate intervals,
Since the end of the beam form was attached to the side of the thick-walled protrusion and concrete was cast, the column main reinforcement inserted through the sheath and the beam main reinforcement ensured the independence of the stacked PC blocks, which were the columns. After that, the beam formwork can be assembled based on the side surface of the thick protrusion of the Pc block and concrete can be poured, so problems such as misalignment between the Pc block and the beam formwork can occur. Moreover, it is also possible to omit or simplify work such as beam width adjustment, making on-site work simple, quick, and accurate.

Then, concrete was poured into this beam form and each free-standing column was connected and integrated by beam casting on site, so an extremely strong concrete structural frame could be formed.

In this way, the concrete structural frame of the present invention is made of PC
By using blocks, it is possible to form concrete pillars of stable quality through factory management while improving transportation, etc.
Beams can be erected between these four pillars by casting on-site to form a strong concrete structural frame that integrates the beams and columns, and this on-site work can also be carried out by forming self-supporting columns and installing beam formwork on thick block protrusions. By attaching it, it can be done accurately and easily.

[Brief explanation of the drawing]

The drawings show examples, and FIG. 1 is a sectional view showing the construction state of, for example, a medium-low rise concrete structure building equipped with the concrete structure frame of the present invention, and FIG. Is 2 is a front view showing the construction state of the building. 3 is a perspective view of a PC block with a T-shaped planar shape, FIG. 4 is a perspective view of a PCC block with an L-shaped planar shape, and FIG. 5 is a perspective view of a PC block with a planar shape of an L-shape. 6 is a sectional view taken along line A-A in FIG. 5, FIG. 7 is a sectional view taken along line B-B in FIG. Embodiments are shown; FIG. 8 is a cross-sectional view of a mid-to-high-rise residential building equipped with the concrete structure frame of the present invention, and FIG. 9 is a cross-sectional view of a skyscraper also equipped with the frame of the present invention. l... Concrete structure frame 3.3a to 3c ・-P C block 4... Self-supporting column 5... Field cast beams 6.6a, 6b... Thick wall protrusion 9... Stacked PC block 0...Column main reinforcement 1...Beam main reinforcement 4...Beam formwork 7...Concrete

Claims (1)

[Claims] T-shaped, L-shaped, or I-shaped with thick protrusions in the beam direction
A plurality or large number of character-shaped PC blocks are stacked one above the other by inserting column main reinforcements, and beam main reinforcements are erected and fixed between the stacked PC blocks arranged at a distance to form self-supporting columns at appropriate intervals. On the other hand, a concrete structure frame characterized in that a beam form end is attached to the side surface of the thick-walled protrusion, concrete is poured, and each self-supporting column is connected and integrated by on-site beam casting.