JPH0673781A - Construction of reinforced concrete structure - Google Patents

Abstract

PURPOSE:To extremely reduce the weight of floor and the whole building and also decrease the construction cost and period. CONSTITUTION:After piling work 1 and foundation work 2, reinforcing rods of columns are arranged and molding frames are assembled. And molding frames 4 of beams are supported by temporary struts 5. Thereafter, light floor slabs 6 are placed between the frames 4. Then steel rods 7 for beams are arranged and concrete is poured in the joints of the molding frames 4 and the light floor slabs 6 after arrangement of steel rods. After the concrete has cured, the molding frames 4 are removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a reinforced concrete building (hereinafter referred to simply as an RC building).

[0002]

2. Description of the Related Art A conventional RC building construction method is to construct a pile, a foundation, a formwork, a bar, and a concrete in order. In the case of a multi-story building, The formwork, bar arrangement, and concrete placing work are carried out in a sequential stacking method, starting from the lower floor.

[0003]

In this conventional construction method for RC buildings, not only the pillars and outer walls of the building but also the floor and ceiling are laid with concrete, so the weight of the entire building is extremely large. As a result, piles, foundations with large volume, number, and diameter were used, and columns and beams had large cross-sectional areas and reinforcing bar amounts. or,
Since it is a method of stacking sequentially from the lower floor, it is not possible to construct multiple floors at the same time, which increases construction costs and takes a long construction period.

The problem to be solved by the present invention is that the problems of the conventional construction method for RC buildings can be solved, the weight of the floor and the entire building can be made extremely low, and the construction cost and construction period can be reduced. It is to provide a construction method of a RC structure of a new concept.

[0005]

[Means for Solving the Problems] The gist of the present invention, which has solved the above problems, is as follows: 1) After piling and foundation work, arranging the columns and assembling the formwork to form a beam-type formwork post for temporary installation. Assembling while supporting it with other members such as, and after assembling the beam formwork, laying the lightweight floor slab between the forms, and also arranging the beam reinforcement, and after the reinforcement, concrete is attached to the joint between the formwork and the lightweight floor slab. Construction method of reinforced concrete structure characterized by pouring and removing the formwork after concrete hardening 2) Lightweight floor slab has multiple strength members erected on the plate outer frame, and fireproof boards are laid on the top and bottom of the frame. Construction method of the reinforced concrete structure according to 1, which is configured by filling a hard foamed resin into an internal space surrounded by the plate outer peripheral frame and the upper and lower fireproof boards 3) The strength member of the lightweight floor slab has a long rectangular shape in cross section. Hard foam resin in the cylinder In Hama the construction methods of the reinforced concrete structure wherein a member.

[0006]

In the present invention, the pillar and beam formwork and bar arrangement are performed after pile driving and foundation work. The beam formwork is supported by members such as temporary columns. After assembling the beam formwork, a lightweight floor slab is installed, and concrete is poured into the joint between the formwork and the lightweight floor slab to be integrated. Therefore, the weight of the floor ceiling is significantly reduced compared to the conventional construction method of placing the floor ceiling with concrete, and there is no burden of strength on the pillars, reinforcements, foundations, and piles.
Small size, size and number can be reduced. Also, since a heavy floor slab is erected before concrete is placed, this floor slab can be used to perform work such as formwork support for the upper floor and concrete placement work / vertical panel installation work, and workability is good. Moreover, multiple floors (2nd to 3rd floor) can be installed at the same time in parallel, and the construction period can be shortened to about half.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a construction procedure of the embodiment, FIG. 2 is an explanatory view showing a formwork assembling work of the embodiment, FIG. 3 is an explanatory view showing a lightweight floor slab erection work, and FIG. 4 is a beam reinforcement work. FIG. 5, FIG. 5 is an explanatory view showing concrete pouring work, FIG. 6 is an explanatory view showing a form removing state, FIG. 7 is a partially cutaway perspective view showing a lightweight floor slab of an embodiment, and FIG. 7 is a sectional view taken along the line AA, and FIG. 9 is a longitudinal sectional view showing the structure of the building after construction.

In the figure, S1 is pile driving work, S2 is foundation work,
3 is a steel frame, 4 is a beam form, 5 is a temporary support column, 6 is a lightweight floor slab, 7 is a beam reinforcement, 8 is an anchor reinforcement protruding from the end face of the lightweight floor slab 6, 9 is a lightweight floor slab 6 Supports to support 10
Is a peripheral frame of the lightweight floor slab 6, 11 is a refractory board attached to the upper and lower surfaces of the lightweight floor slab 6, 12 is a hollow housing having a rectangular cross-section that is erected between the peripheral frames 10 of the lightweight floor slab 6, and 13 is Hard foam resin filled in the lightweight floor slab 6, 14 is a hollow housing 1
2 is a hard foam resin filled in, 15 is a building, 16 is an outer wall of the building 15, and 17 is a reinforced concrete beam portion of the building 15.

In FIG. 1, S1 is pile driving work, S2 is foundation work, S3 is formwork work, S4 is lightweight floor slab construction work, S5 is reinforcement work, S6 is concrete placement work, and S7 is formwork. Removal work.

In this embodiment, first, as in the conventional method, the pile driving work S
1. Perform foundation work S2. As will be described later, the number, diameter, and volume of the piles used for this are smaller and smaller than conventional ones.

Next, the reinforcement of the columns, the assembling of the form of the column, and the assembling of the form 4 as the beam portion are performed. When the assembling of the formwork which becomes the beam part is completed, the beam reinforcement is arranged in the formwork 4, and the anchor reinforcement 8 protruding from the end face of the lightweight floor slab 6 is allowed to enter the space of the formwork 4. And Then, concrete is poured into the space surrounded by the end faces of the formwork 4 and the lighter floor slab 6 that follows it. After pouring and hardening the concrete, the formwork 4, the temporary support columns 5 and the support 9 are removed, and the skeleton work is completed. FIG. 9 shows the structure of the building when the frame is completed. The floor slab portion of the RC structure having an extended area of 500 tsubo on the 5th floor will weigh about 59 tons when constructed with concrete. By using the lightweight floor slab 6 of this embodiment, 82 tons, which is approximately 1/7.
The weight of

[0012]

As described above, according to the present invention, since the floor portion of the concrete structure is used for the lightweight floor slab, the weight of the RC structure is greatly reduced, and other factors are accompanied. The size and volume of the structural body can be reduced, and the weight of the RC structure can be greatly reduced. Also, the lightweight floor slab installed on the formwork can be used as a scaffold for the next work, and the construction work can be speeded up. Further, since the work can be done without waiting for about one month for the concrete to harden, the construction period can be greatly shortened.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a construction procedure of an embodiment of the present invention.

FIG. 2 is an explanatory view showing a formwork assembling work of the embodiment.

FIG. 3 is an explanatory diagram showing a construction work for constructing a lightweight floor slab according to an embodiment.

FIG. 4 is an explanatory diagram showing a reinforcement work of the embodiment.

[Fig. 5] Fig. 5 is an explanatory view showing a reinforcing bar construction work of the embodiment.

FIG. 6 is an explanatory diagram showing concrete placing work according to the embodiment.

FIG. 7 is a partially cutaway perspective view showing a lightweight floor slab of an embodiment.

8 is a sectional view taken along the line AA of FIG.

FIG. 9 is a vertical sectional view showing the structure of a building after construction.

[Explanation of symbols]

 S1 Piling work S2 Foundation work 3 Steel frame 4 Formwork 5 Temporary support column 6 Lightweight floor slab 7 Beam reinforcement 8 Anchor reinforcement 9 Support 10 Outer frame 11 Fireproof board 12 Hollow housing 13 Hard foam resin 14 Hard foam resin 15 Building 16 Outer wall 17 Beam part

Claims (3)

[Claims] 1. After pile driving and foundation work, pillar reinforcement and formwork assembly are performed, the beam formwork is assembled while being supported by a member such as a temporary support column, and the beam floor is assembled after the beam formwork assembly. Reinforced concrete structure characterized in that the slab is installed between the formwork, beam reinforcement is performed, concrete is poured into the joint between the formwork and lightweight floor slab after reinforcement, and the formwork is removed after the concrete is hardened. Body construction method. 2. A lightweight floor slab, wherein a plurality of strength members are erected on a plate outer peripheral frame, fireproof boards are attached to upper and lower surfaces thereof, and hard foam resin is provided in an internal space surrounded by the plate outer peripheral frame and the upper and lower fire resistant boards. The method for constructing a reinforced concrete structure according to claim 1, wherein the method is a method for constructing a reinforced concrete structure. 3. The method for constructing a reinforced concrete structure according to claim 2, wherein the strength member of the lightweight floor slab is a member in which a long foam having a rectangular cross section is filled with hard foam resin.