JPH0673780A - Construction of steel framed reinforced concrete structure - Google Patents

Abstract

PURPOSE:To greatly reduce the weight of floor and also the whole of building and reduce the construction period and also reduce the scale of pile, foundation work, and temporary construction work and hence, decrease the construction cost. CONSTITUTION:After piling work, foundation work and steel skeleton erection, light floor slabs 5 are laid down between the assembled steel skeleton beams 1 and reinforcing rods 12 are arranged between the endfaces of the light floor slabs 5 and the outer periphery of the steel skeleton beams 1. Molding frames 13 are assembled at the outer periphery of the steel skeleton beams 1 and thereafter, concrete is placed into the frames 13 to unify the light floor slabs 5 and the steel skeleton beams 1 by the concrete and form time floor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for a steel-framed reinforced concrete building (hereinafter, simply referred to as an SRC structure).

[0002]

2. Description of the Related Art Conventional construction methods for SRC structures are carried out in the order of piling work, foundation work, steel frame construction, rebar work, formwork work, and concrete placement. It was a concrete structure integrated with reinforced concrete. 13 and 14 are cross-sectional views of a conventional SRC structure, where the shaded portion is the concrete portion. In the case of multi-story buildings, formwork, bar arrangement work, and concrete placing work are carried out in a sequential stacking method, starting from the lower floor.

[0003]

In the conventional construction method for SRC buildings, not only the pillars / outer walls of the building but also the floor / ceiling are laid with concrete, so that the weight of the entire building becomes extremely large. , Only that, piles, foundations, pillars,
All the beams had to be strong, and the weight of the entire structure was large. In addition, large-scale construction was required for the piles and foundation work. Furthermore, temporary construction required the construction of large tower cranes and large-scale scaffolding. At the same time, the construction period was long due to the sequential pile-up construction from the lower floor.

The problem to be solved by the present invention is to solve these problems of the conventional construction method, to significantly reduce the weight of the floor of the building and the entire construction, to shorten the construction period, and to construct the piles and foundations. -It is to provide a construction method for SRC buildings with a new concept that temporary construction work can be done with a small scale and construction costs can be reduced.

[0005]

[Means for Solving the Problems] The gist of the present invention which has solved the above problems is as follows: 1) After a pile driving work, a foundation work and a steel frame erection work, a lightweight floor slab is installed between assembled beam steel frames, Reinforcing bars are arranged between the end faces of the same lightweight floor slab and around the beam steel frame, a formwork is assembled around the beam steel frame, and then concrete is poured into the same formwork to integrate the lightweight floor slab and the beam steel frame part with reinforced concrete. Construction method for steel reinforced concrete structures characterized by forming floors 2) A lightweight floor slab has multiple strength members erected on the outer frame of the floor slab, fireproof boards are attached to the top and bottom surfaces of the floor slab, and hard foam inside Construction method of the steel-framed reinforced concrete structure according to 1, which is a structure filled with resin. 3) Steel-framed reinforced concrete according to 2, wherein the strength member of the lightweight floor slab is a long casing and hard foamed resin is filled inside. Structure In the dating method.

[0006]

In the present invention, a lightweight floor slab filled with a rigid foam resin is erected between the beam steel frames, and then concrete is cast by arranging and forming a frame around the beam steel frame to join the steel frame and the lightweight floor slab. The parts are integrated with reinforced concrete to construct the structure body of pillars and wall surfaces. The floor part of the building is installed only by placing a lightweight floor slab after constructing the steel frame, and this temporary lightweight floor slab can be used as a scaffold, and the construction of the next bar arrangement, formwork, outer wall surface and the above Construction on the floor is possible, and most of the work can be done without the need to assemble scaffolding with pipes and scaffolding boards. Also, because the lightweight floor slab is filled with hard foamed resin, it can be made much lighter than a conventional floor made of reinforced concrete only, which reduces the burden on the strength of steel frames, foundations and piles, and is small and lightweight. As a result, the weight and construction cost of the entire building can be significantly reduced.

Further, a plurality of reinforcing materials filled with hard foam resin are suspended in a plate frame inside a casing having a rectangular cross section, and a fireproof board is laid above and below the frame frame. The foamed resin-filled material has a light weight and sufficient strength, and is a fire-resistant flooring material.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is an explanatory view showing a construction process of the embodiment, FIG. 2 is an explanatory view showing a steel frame erection process, FIG. 3 is an explanatory view showing a mounting process of a lightweight floor slab to a steel frame, and FIG. 4 is a description showing a reinforcing bar process. Figure, Figure 5
6 is an explanatory view showing a formwork assembling process, FIG. 6 is an explanatory view showing a concrete placing process, FIG. 7 is an explanatory view showing a completed state after removing the formwork, and FIG. 8 is a sectional view showing a construction completed state of the embodiment. 9 is a partially cutaway perspective view showing a lightweight floor slab, FIG. 10 is a sectional view taken along the line AA of FIG. 9, and FIG.
FIG. 12 is a vertical sectional view of a 0-story SRC building, and FIG. 12 is a horizontal sectional view thereof.

In the figure, 1 is a beam steel frame, 2 is a floor plate receiving frame attached to the beam steel frame 1, 3 is an L angle member of the floor plate receiving frame 2, and 4 is the same L
A holding member for the floor plate receiving frame 2 that supports the angle member 3 on the beam steel frame 5, 5 is a lightweight floor slab, 6 is a fireproof board attached to the upper and lower surfaces of the same lightweight floor slab 5, 7 is an outer peripheral frame of the lightweight floor slab 5, 8 is an anchor rebar projecting from the outer peripheral frame 7; 9 is a hollow housing having a rectangular cross section, which is installed inside the lightweight floor slab 5;
Is a hard foam resin filled inside the lightweight floor slab 5, 12 is a reinforcing bar, 13 is a formwork, 14 is an outer wall, and 15 is a steel beam-reinforced concrete beam portion.

In FIG. 1, S1 is a pile driving process, S2 is a foundation construction process, S3 is a steel frame erection process, S4 is a lightweight floor slab mounting process, S5 is a reinforcing bar process, S6 is a formwork installation process, and S7 is S7. The concrete placing step, S8 is a form removing step.

This embodiment is an example of the SRC building construction process for constructing a 10-story SRC building structure shown in FIGS. In the building construction process, as shown in FIG. 1, after the pile driving process S1 and the foundation process S2, the steel frame / column / beam steel frame 1 is assembled using a crane or the like to perform the steel frame erection process S3. A floor board receiving frame 2 is attached to the beam steel frame 1 at a factory. Therefore, next, the lightweight floor slab 5 is stored between the beam steel frames 1 while being placed on the L-angle member 3 of the floor plate receiving frame 2. Of course, the lightweight floor slab 5 and the floor board receiving frame 2 are not simply placed, but temporarily fixed with necessary bolts, nuts, welding, etc.

Next, the reinforcing bars 12 are laid out on the outer circumference of the beam steel frame (reinforcing step S5), and then the formwork 13 is set (formwork installing step S6). After that, concrete is poured into the mold 13 to integrate the lightweight floor slab 5 and the beam steel frame 1 with concrete (concrete placing step S7). In this way, the floors and beams of the building are constructed. Here, the lightweight floor slab 5 can be installed in the lower floor in a sequential stacking system or at the same time on the second and third floors simultaneously. Moreover, the lightweight floor slab 5 can be used as a scaffold for construction work, using special scaffolding boards, pipes, etc. Work can be carried out efficiently without the need for a scaffold. Moreover, the conventional S
Using the lightweight floor slab 5 of the present invention, the concrete floor of an RC building of 1,200 tons can be 165 tons.
The floor weight can be reduced to about ⅛.

As shown in FIGS. 11 and 12, S of the present embodiment
The concrete portion of the RC building is only the hatched portion, and the amount of concrete used can be greatly reduced as compared with the conventional ones shown in FIGS.

For example, in the case of a building with a total floor area of 1,000 tsubo on the 10th floor, the construction period of the conventional construction method is 14 months, whereas that of this embodiment is 10 months or less, and the floor weight is 1,20.
0 tons can be about 165 tons. Further, in this embodiment, since the weight of the building is small, the cross-sectional areas of columns and beams, the amount of reinforcing bars, and the steel frames can be all small. Also piles and foundation volume
The number and diameter can be small. The tower crane and temporary scaffolding for temporary construction may be small. Further, when the lightweight floor slab is erected on the beam steel frame, the next work and the work on the upper floor can be immediately performed, so that the construction period can be greatly shortened.

[0015]

As described above, according to the present invention, the weight of the floor and the entire building can be greatly reduced, the construction cost can be greatly reduced, and the construction period can be greatly shortened. It was possible to obtain the excellent effect.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a construction process according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a steel frame erection process of the embodiment.

FIG. 3 is an explanatory diagram showing a mounting process of the lightweight floor slab of the embodiment.

FIG. 4 is an explanatory diagram showing a reinforcing bar arrangement process of the example.

FIG. 5 is an explanatory view showing a mold frame assembling process.

FIG. 6 is an explanatory diagram showing a concrete placing step.

FIG. 7 is an explanatory diagram showing a completed state in which the mold is removed.

FIG. 8 is a sectional view showing a construction completed state of the embodiment.

FIG. 9 is a partially cutaway perspective view showing the lightweight floorboard of the embodiment.

10 is a cross-sectional view taken along the line AA of FIG.

FIG. 11 is a vertical sectional view of a 10-story SRC building according to an embodiment.

FIG. 12 is a transverse sectional view of the same.

FIG. 13 is a vertical cross-sectional view of a conventional SRC building.

FIG. 14 is a cross-sectional view of a conventional SRC building.

[Explanation of symbols]

 1 Beam Steel Frame 2 Floor Plate Receiving Frame 3 L Angle Material 4 Holding Member 5 Lightweight Floor Slab 6 Fireproof Board 7 Outer Perimeter Frame 8 Anchor Rebar 9 Hollow Housing 10 Hard Foam Resin 11 Hard Foam Resin 12 Reinforcing Bar 13 Form Frame 14 Outer Wall 15 Beam Part

Claims (3)

[Claims] 1. A lightweight floor slab is installed between the assembled beam steel frames after pile driving work, foundation work and steel erection work, and reinforcing bars are arranged between the end faces of the light weight floor slab and around the beam steel frame. A method for constructing a steel reinforced concrete structure, characterized in that a frame is assembled around the steel frame of the same beam, and then concrete is poured into the same frame to form a floor by integrating the lightweight floor slab and the beam steel part with reinforced concrete. 2. The steel frame according to claim 1, wherein the lightweight floor slab has a structure in which a plurality of strength members are erected on an outer peripheral frame of the floor slab, fireproof boards are attached to upper and lower surfaces thereof, and hard foamed resin is filled therein. Construction method for reinforced concrete structures. 3. The method for constructing a steel-framed reinforced concrete structure according to claim 2, wherein the strength member of the lightweight floor slab has a structure in which a hard foam resin is filled inside a long casing.