JPH0598708A - Installation method and device for floor slab of unit building - Google Patents

Abstract

PURPOSE:To make it possible to support a floor slab directly by a concrete beam without lowering productivity when a unit building having a construction of reinforcing bar or steel framed reinforced concrete is constructed by adding a concrete beam to a floor beam of a building unit. CONSTITUTION:In an installation method of a floor slab of a unit building 10 wherein a concrete beam 14A is placed along a floor beam 23 of an inner unit 11 and a floor slab 26 is installed on said concrete beam 14A, the floor slab 26 is supported by the floor beam 23 until the beam 14A is cured. And when the beam 14A has been cured, the floor slab 26 is supported by the concrete beam 14A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is suitable for constructing a high-rise unit building having a reinforced concrete structure or a reinforced concrete structure,
A floor slab installation method and apparatus for a unit building.

[0002]

2. Description of the Related Art Conventionally, as a unit building having a reinforcing bar or a steel frame reinforced concrete structure, there is one described in JP-B-55-14217. This unit building is constructed by repeating the steps of suspending and installing reinforcing bars in the region between the side walls of adjacently arranged building units and then placing concrete in the region between the side walls over each floor.

[0003]

However, in the prior art, it is necessary to effectively dispose the concrete wall in terms of structural strength, which becomes a plan constraint for the internal space of the building.

Therefore, when constructing a unit building having a reinforced concrete structure or a steel reinforced concrete structure, concrete columns or concrete beams are laid along the columns or beams of the building unit in order to increase the degree of freedom in the plan of the interior space of the building. It is conceivable to secure structural strength with columns and concrete beams.

However, when a floor slab is supported by a floor beam of a building unit and a concrete beam is attached to the floor beam, the floor load acting on the floor slab is applied to the floor beam through the floor beam. Will be transmitted to. That is, the floor slab cannot be directly supported by the concrete beam, and it is difficult to secure sufficient structural strength. In addition, the floor beam needs to have a sufficient cross-sectional strength even after the concrete is placed, and the material economy is poor.

If a concrete beam is attached to the floor beam of the building unit and then the floor slab is placed on the concrete beam, the floor slab can be directly integrated with the concrete beam. However, in this case, the floor slab cannot be unitized in advance at the factory stage, which impedes productivity.

According to the present invention, when a concrete beam is attached to a floor beam of a building unit to construct a unit building having a reinforcing bar or a steel reinforced concrete structure, the floor slab is directly attached to the concrete beam without impairing productivity. The purpose is to be supportable.

[0008]

The present invention according to claim 1 is a method for installing a floor slab of a unit building, in which a concrete beam is placed along a floor beam of a building unit and the floor slab is installed on the concrete beam. In the above, the floor slab is supported by the floor beam before hardening of the concrete beam, and the floor slab is supported by the concrete beam after hardening of the concrete beam.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, the floor beam of the building unit further comprises:
It is designed to form a scrap frame for placing concrete beams.

According to a third aspect of the present invention, in a floor slab installation device of a unit building, a concrete beam is placed along a floor beam of a building unit, and a floor slab is installed on the concrete beam. Wearing and having a slab support bolt with a slab support, the slab support bolt,
The floor slab is set to the slab support level to support the floor slab, and the slab non-support level is set to allow the slab support to be spaced below the floor slab.

[0011]

According to the present invention, there are the following actions. The load acting on the floor slab is supported by the floor beam until the cast concrete beam hardens and the required strength appears.
Then, after the concrete beam is hardened, the floor slab is cut off from the floor beam to transfer all the load acting on the floor slab to the concrete beam. That is, the floor slab can be directly supported by the concrete beam, and sufficient structural strength can be secured. Further, the floor beam is sufficient as long as it has the minimum cross-sectional strength before placing concrete, and the material economy is good.

The floor slab is unitized in advance in a state of being supported by the slab support bolt fitted to the floor beam at the factory stage, so that productivity is not impaired.

Since the floor beam functions as a scrap frame for placing concrete beams, the structure for placing concrete beams can be remarkably simplified, and the man-hours for placing concrete beams can be remarkably reduced. Can be improved.

[0014]

EXAMPLE FIG. 1 is a schematic diagram showing a construction procedure of a high-rise unit building, FIG. 2 is a schematic diagram showing an inner unit, FIG. 3 is a schematic diagram showing an outer unit, FIG. 4 is a schematic diagram showing a column unit, and FIG. Is a schematic diagram showing a girder unit, FIG. 6 is a schematic diagram showing a beam-column joining unit, FIG. 7 is a plan view showing a unit arrangement state of a high-rise unit building, and FIG. 8 is a schematic diagram showing an installation state of slab support bolts. 9 is a schematic view showing a procedure of using the slab support bolt.

The unit building 10 is shown in FIGS. 1 (A) to 1 (E).
As shown in the figure, on the foundation, as a plurality of building units,
The inner unit 11 forming the interior space of the building and the outer unit 12 forming the outer peripheral portion of the building are adjacently arranged in the horizontal and vertical directions. And the unit building 10
As described later in detail, the adjacent inner units 1
1. The column unit 13 arranged in the inter-column region of the outer unit 12, the girder unit 14 arranged in the inter-beam region, the column unit 13 and the girder unit 14.
By concrete is poured into each of the beam-column joining units 15 arranged in the intersection region, the RC rigid frame including the concrete column 13A and the concrete beam 14A is configured.

The inner unit 11 is shown in FIG.
As shown in (E), four steel plate columns 21 and four steel plate floor beams 2 joined to the lower ends of the columns 21 by bolts 22.
3 and 4 which are joined to the upper ends of the pillars 21 by bolts 4
It is a box-shaped frame body configured by including a steel plate ceiling beam 25 of a book. In addition, the inner unit 11 is carried into the construction site after the floor slab 26, the floor base 27, the ceiling joist 28, the ceiling board 29, the interior of the water supply / drainage, the photothermal wiring, the piping communication equipment, etc. are applied in the factory. Installed.

The outer unit 12 is, as shown in FIG.
It is a skeleton body having a steel plate column 31 and a steel plate beam 32, and is exteriorized such as an outer wall 33 and an opening 34 in a factory, and then carried into a construction site and installed.

Here, the columns 21 and 31 of the inner unit 11 and the outer unit 12 are made of L-shaped cross-section members which are concave with respect to the inter-column region. Both ends of the L-shaped cross sections of the columns 21 and 31 are provided with bending engaging portions 21A that can engage with both-end bending engaging portions 43A of an auxiliary mold 43 of the column unit 13 described later.

The column unit 13 is shown in FIG.
As shown in (B), a pipe 41 made of steel pipe that penetrates through the central portion of the cross section is provided, and column reinforcements 42 that allow concrete to be placed are provided around the pipe 41. Also,
The column unit 13 includes the adjacent inner units 11 and
The outer unit 12 is provided with a steel plate auxiliary mold 43 installed in a plurality of pillar gaps around the inter-columnar region, and the opposing auxiliary molds 43, 43 are connected to each other by a splice 44. The joint bar 44 is welded to a steel bar reinforcing rib 45 which is welded to each auxiliary form 43.

Here, the column reinforcements 42 of the column unit 13
Is a column main bar 46 extending in the column longitudinal direction, a reinforcing bar 47 arranged so as to surround each column main bar 46, and the above-mentioned joint bar 4.
4 and. The auxiliary mold 43 is provided with bending engaging portions 43A at both ends so that it can be engaged with the bending engaging portions 21A of the columns 21 and 31.

That is, in the unit building 10, the pillar 2 of the inner unit 11 and the outer unit 12 which are adjacent to each other.
1, 31 and the auxiliary formwork 43 installed in the space between the columns form a scrap formwork for placing the concrete column 13A on the column unit 13.

The girder unit 14 is shown in FIG.
As shown in (B), it is provided with a beam reinforcement 51 capable of placing concrete. Further, the girder unit 14 includes steel plate auxiliary molds 52 and 53 installed in a plurality of beam gaps around the inter-beam regions of the adjacent inner unit 11 and outer unit 12, and the auxiliary molds on the opposite side surfaces are opposed to each other. 5
The two and 52 are connected to each other by a conduit pipe 54, and the auxiliary formwork 53 on the bottom surface is supported by the splice lines 55 of the beam arrangement 51. The auxiliary formwork 52 is the floor beam 2 of the upper floor inner unit 11.
3 and the ceiling beam 25 of the lower inner unit 11 are installed in the beam gap, and the auxiliary formwork 53 is installed in the beam gap of the ceiling beams 25 of the left and right inner units 11. In addition, line pipe 5
4. The joint line 55 is welded to each auxiliary formwork 52, 53.

Here, the beam reinforcement 5 of the girder unit 14
1 is a beam main bar 56 extending in the beam longitudinal direction and each beam main bar 56
It is composed of a reinforcing bar 57 that surrounds the above and the above-mentioned connecting bar 55. The auxiliary form 52 has a bent portion 52A on the ceiling beam 25 of the lower inner unit 11 at the lower end, and a bent portion 52B that supports the floor beam 23 of the upper inner unit 11 at the upper end. Also, the auxiliary formwork 5
3 is provided with bending engaging portions 53A at both ends, and can be engaged with the bending engaging portions 25A of the ceiling beam 25.

That is, in the unit building 10, the floor beams 2 of the inner unit 11 and the outer unit 12 which are adjacent to each other.
3, the ceiling beam 25, the beam 32, and the auxiliary formwork 52, 53 installed in the beam gap constitute a scrap formwork for placing the concrete beam 14A on the girder unit 14. ..

The column-beam joining unit 15 is shown in FIG.
As shown in (B), a steel pipe intermediate pipe 61 that penetrates through the central portion of the cross section is provided, and a column reinforcement 62 and a beam reinforcement 63 that allow concrete to be placed are provided.

Here, the column reinforcement 6 of the column-beam joining unit 15
2 is a column main bar 64 extending in the column longitudinal direction, and each column main bar 64
And a reinforcing bar 65 arranged so as to surround the. The beam reinforcement 63 of the beam-column joining unit 15 is composed of a beam main reinforcement 66 extending in the beam longitudinal direction and a reinforcing reinforcement 67 arranged so as to surround each beam main reinforcement 66.

The inner units 11, which are vertically adjacent to each other,
When the column unit 13 of the outer unit 12 is joined by the beam-column joining unit 15, the pipes 41 of the column units 13 on the upper and lower floors are mutually connected via the pipe 61 of the column-beam joining unit 15 as shown in FIG. 4C. Can communicate. At this time, the upper ends of the pipes 41 and 61 are straight, whereas the lower ends of the pipes 41 and 61 are in the receiving portion 68.
As will be described later, the pipe 41, 61 is less likely to adhere and remain with the concrete to be pumped in the pipe 41, 61,
In addition to the straight shape of the upper end portion of 61, the lower end portion of the pipes 41 and 61 that are easily fitted to the upper end portions of the pipes 41 and 61 on the lower floor side are provided.

A method of constructing the unit building 10 will be described below. (1) An inner unit 1 in which a plurality of inner units 11 and outer units 12 are suspended on a foundation to form one layer
1. The outer unit 12 is horizontally adjacently arranged (see FIG. 1A and FIG. 7).

(2) The column unit 13 is arranged so as to be inserted into the inter-column region of the columns 21 and 31 made of the L-shaped cross-section material of the inner unit 11 and the outer unit 12 which are arranged adjacent to each other (see FIG. 1B). ).

(3) Ceiling beam 2 of inner unit 11 and outer unit 12 in which girder units 14 are arranged adjacent to each other
5 and 32 are arranged in the inter-beam region (see FIG. 1C).

(4) The column-beam joint unit 15 is arranged in the intersection region of the column unit 13 and the girder unit 14.
At this time, the pipe 61 lower end receiving portion 68 of the column-beam joining unit 15 is fitted into the upper straight portion of the pipe 41 of the column unit 13. In addition, the column main bar 46 of the column unit 13 and the column main bar 64 of the column-beam joining unit 15 are welded,
Beam main bar 5 of girder unit 14 joined with a special joint
6 and the beam main reinforcement 66 of the beam-column joining unit 15 are welded and joined by a special joint.

(5) Inner unit 1 constituting the upper layer
1. The outer unit 12 is arranged adjacent to the upper part of the inner unit 11 and the outer unit 12 which are lower layers of the above (1).

(6) Inner units 11 arranged adjacent to each other,
The pillars 21 and 31 of the outer unit 12 and the ceiling beam 2 on the lower floor
5 and 32 and upper floor floor beams 23 and 32 are scrap frames, and auxiliary molds 43, 52 and 53 provided in the column unit 13 and the girder unit 14 are scrap frames, and a column unit for one layer 13 and the girder unit 14 are poured with concrete to form concrete columns 13A and concrete beams 14A. At this time, the pipe 41 of the column unit 13 on the upper and lower floors is connected to the column-beam joining unit 15 of (4) above.
Are connected to each other through a pipe 61 of the pipe, and the concrete is the pipe 41 of the column unit 13 in the lowermost layer.
It is filled from the lower part and is placed around the pipe 41 of the column unit 13 which is the placement floor this time, the girder unit 14, and the beam-column joining unit 15 (see FIG. 1D).

The duct 69 is connected to the conduit pipe 54 provided in the girder unit 14 before or after the concrete pouring in (6) above (see FIG. 1 (E)). (7) For each floor of the unit building 10, above (1) to (6)
repeat.

However, the inner unit 11 has a slab support bolt 80 fitted to the floor beam 23 as shown in FIG. 8, and (a) before the concrete beam 14A of (6) above is hardened. , The slab support level is set, the floor slab 26 is supported by the slab receiving portion 81, and (b) the concrete beam 14
After the curing of A, it is set to the slab non-supporting level so that the slab receiving portion 81 is spaced below the floor slab 26, and as a result, the floor slab 26 is directly supported by the concrete beam 14A.

When placing concrete on the girder unit 14 in the above (6), the upper end of the scrap frame is formed on the upper flange of the floor beam 23 of the inner unit 11 on both sides, which is a scrap frame. A different spacer 100 is installed (see FIG. 5A and FIG. 8).

The installation structure and usage procedure of the slab support bolt 80 will be described below. That is, the nut 82 is welded to the back surface of the upper flange of the floor beam 23, the above-mentioned slab receiving portion 81 is provided in the middle portion of the slab support bolt 80, and the lower end screw portion of the slab support bolt 80 is the nut 82.
The nut 83 fitted to the slab support bolt 80 and the nut 83 fitted to the upper end screw part of the slab support bolt 80 is provided between the slab support part 81 and the floor slab 2
6 can be held with a pinching force. And the slab support bolt 80
Is used according to (1) and (2) below.

(1) Setting work of the slab support bolt 80 on the slab support level The lower end thread portion of the slab support bolt 80 is screwed into the nut 82 provided on the floor beam 23 (see FIG. 9A). At this time, the slab support bolt 80 is set to the slab support level described in (a) above.

Slab support 81 of slab support bolt 80
The support hole 26A of the floor slab 26 is fitted to the upper portion to support the floor slab 26 on the slab receiving portion 81 (see FIG. 9 (B)). Fix the upper cross hole of the slab support bolt 80 with a tool, and attach the nut 8 to the upper screw part of the slab support bolt 80.
By fastening No. 3, the floor slab 26 is held between the nut 83 and the slab receiving portion 81 (see FIG. 9C).

(2) Setting work of the slab support bolt 80 to the slab non-support level Fix the upper end cross hole of the slab support bolt 80 with a tool, loosen the nut 83 from the upper screw part of the slab support bolt 80, and tighten the nut. 83 is removed (see FIG. 9 (D)).

The slab support bolt 80 is screwed with respect to the nut 82 by a tool engaged with the upper end surface cross hole of the slab support bolt 80, and the slab support bolt 80 is moved to the above-mentioned position.
Set to the slab non-support level in (b) (see Fig. 9 (E)).

In the unit building 10, it is not essential to dispose the column units 13 in all the inter-pillar regions of the inner unit 11 and the outer unit 12 which are adjacent to each other. (Area between columns 21 indicated by a broken line at)
For, it is possible not to arrange the column unit 13. In that case, the pillar 21 of the column unit 13 can be removed at the stage where the structural strength of each floor is secured by the completion of the concrete pouring on each floor, and a large living room space or the like can be obtained. The pillar 21 can be removed by removing the bolts 22 and 24 from the joint between the floor beam 23 and the ceiling beam 25.

In addition, in the unit building 10, it is not essential to pour concrete for each floor, and the column unit 13 and the girder unit 14 for a plurality of floors (all floors may be used). , It is also possible to place concrete at once.

Next, the operation of this embodiment will be described. Until the cast concrete beam 14A hardens and the required strength is obtained, the load acting on the floor slab 26 is the floor beam 23.
Supported by. Then, after the concrete beam 14A is hardened, the floor slab 26 is cut off from the floor beam 23, and the floor slab 26 is cut.
All the load acting on the concrete beam will be transmitted to the concrete beam 14A. That is, the floor slab 26 is replaced by the concrete beam 14A.
It can be directly supported by and can secure sufficient structural strength. Further, the floor beam 23 is sufficient as long as it has the minimum cross-sectional strength before placing concrete, and the material economy is good.

The floor slab 26 is the floor beam 23 at the factory stage.
The unit is preliminarily united in a state of being supported by the slab support bolt 80 fitted to the slab and does not hinder productivity.

Since the floor beam 23 functions as a scrap frame for placing the concrete beam 14A, the concrete beam 14
The construction for placing A can be remarkably simplified, and the number of working steps for placing the concrete beam 14A can be significantly reduced, so that productivity can be improved.

In the practice of the present invention, the unit building 10 does not necessarily use the beam-column joining unit 15. When the column-beam joining unit 15 is not used, the structure shown in FIG.
As shown in (D), the column reinforcements 42 of the column unit 13 are provided with the column reinforcements 71 that are joined to the column reinforcements 46 of the column units 13 that intersect with each other, and the beam reinforcements 56 of the girder unit 14 that intersect with each other. Beam main bar 72 to be joined
And will be equipped.

[0048]

As described above, according to the present invention, when a concrete beam is added to a floor beam of a building unit to construct a unit building having a reinforcing bar or a steel frame reinforced concrete structure,
The floor slab can be directly supported by the concrete beam without impeding productivity.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a construction procedure of a high-rise unit building.

FIG. 2 is a schematic diagram showing an inner unit.

FIG. 3 is a schematic diagram showing an outer unit.

FIG. 4 is a schematic view showing a column unit.

FIG. 5 is a schematic view showing a girder unit.

FIG. 6 is a schematic view showing a beam-column joining unit.

FIG. 7 is a plan view showing a unit arrangement state of a high-rise unit building.

FIG. 8 is a schematic view showing an installed state of slab support bolts.

FIG. 9 is a schematic view showing a procedure of using the slab support bolt.

[Explanation of symbols]

 10 unit building 11 inner unit (building unit) 14A concrete beam 23 floor beam 26 floor slab 80 slab support bolt 81 slab receiving part

Claims (3)

[Claims] 1. A floor slab installation method for a unit building, in which a concrete beam is cast along a floor beam of a building unit, and the floor slab is installed on the concrete beam. A method for installing a floor slab in a unit building, which comprises supporting the beam on a beam and, after hardening the concrete beam, supporting the floor slab on the beam. 2. The floor slab installation method for a unit building according to claim 1, wherein the floor beam of the building unit constitutes a scrap frame for placing a concrete beam. 3. A floor slab installation device of a unit building in which a concrete beam is placed along a floor beam of a building unit and a floor slab is installed on the concrete beam, and the slab receiving portion is fitted to the floor beam. Having a slab support bolt, the slab support bolt being set to a slab support level to support the floor slab to the slab support, and set to a slab non-support level to space the slab support below the floor slab. A floor slab installation device for a unit building, which is constructed so that it can be pressed.