JPH0363338A - Construction method of reinforced concrete skeleton - Google Patents

Abstract

PURPOSE:To simplify field work and to reduce a construction period by providing a cylindrical column form with openings on the up and down ends and a steel plate column and beam weld form to the head of a column, and connecting between adjacent columns with a solid beam form of a steel plate. CONSTITUTION:Column main bars 1 of a precast concrete column A having a hollow section are welded to reinforcing bars of the foundation or the lower column, and a column and beam weld form B is fixed to the head of the column. The column and beam weld form B is formed of square cylindrical column forms 2 having openings on the up and down ends and beam forms 3 having channel sections together as a unit by a steel plate. A beam form C, which is formed of reinforcing steel 6 together as a unit, is connected between the column and beam weld form B and beam formed 3 in the head of the column of the adjacent column A, and it is supported by supports 7. After that, concrete is placed to the beam forms 3 and column and beam weld form B. Then, the progress of work is sequently repeated. According to the constitution, field works such as assembling and disassembling of forms, etc., are eliminated, and a construction period can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of constructing reinforced concrete or a steel reinforced concrete frame.

(Conventional technology) Conventionally, when constructing a reinforced concrete frame, the cast-in-place concrete method involves the following steps: assembling formwork on site, installing shoring, assembling reinforcing bars, pouring concrete, formwork, stripping, and dismantling shoring. Furthermore, the column-beam joints required complicated machining.

For this reason, conventionally, the reinforcing bars of beam members are assembled in advance in a basket shape on the ground for each unit, and then set in a predetermined formwork part by a crane, or set in a predetermined position together with the formwork.
The aim is to reduce reinforcement work and formwork assembly work on site.

(Problems to be Solved by the Invention) However, in this case, it is necessary to demold the formwork, and furthermore, this work is performed at a high place.

Furthermore, since the formwork itself is made of processed wooden boards or a combination of small parts, it has poor rigidity and is difficult to handle.

Furthermore, at the column-beam joint, a great deal of time and effort was required to fabricate a complicated formwork to match the shape of the joint and to remove the formwork.

The present invention has been proposed in view of the problems of the prior art, and its objectives are to significantly simplify on-site work, save labor, reduce construction period, and reduce construction costs. The purpose of this invention is to provide a construction method for a reinforced concrete frame.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the method for constructing a reinforced concrete frame according to the present invention includes a cylindrical reinforced concrete frame with both upper and lower end surfaces open, and a reinforced concrete frame that is branched from the outer periphery of the same type. A column-beam joint form made of steel plate, which is made by integrally joining a groove-shaped beam that communicates with the inner cavity of the company's model, is fixed to the column head of the column installed at a predetermined position, and then Connecting a beam formwork integrally formed with a steel plate across the column-beam joint formwork in the column,
The beam formwork is supported on the floor via a support, and then concrete is poured into the beam formwork and the column-beam joint formwork,
After the poured concrete has hardened, the next column is constructed on top of the column without removing each of the formworks, and the above steps are repeated.

(Function) According to the present invention, as described above, a groove-shaped beam extending from the outer circumferential surface of the cylindrical cylindrical cylindrical cylindrical cylindrical cylindrical cylindrical cylindrical cylindrical cylindrical product, which has both upper and lower end surfaces open, extends out from the outer peripheral surface of the cylindrical cylindrical cylindrical cylindrical model. A steel column-beam joint formwork with integrally molded steel and beam shapes is fixed to the column head, and the beam is integrally molded with a steel plate over the column-beam joint formwork of each column head of adjacent columns. The formwork is connected and supported on the floor via supports, and then concrete is poured into the beam formwork and the column-beam joint formwork, and the beam portion located between the column-beam joint and the beam joint is formed. It is intended to integrate the

After the poured concrete has hardened, each of the formworks is used as a discarded formwork without being demolded, and the next column is constructed on top of the column.

(Example) The present invention will be described below with reference to the illustrated embodiments.

(A) is a precast concrete column with a hollow cross section. After setting it in a predetermined position and connecting the main reinforcement (1) of the company (A) with the reinforcing steel of the foundation or lower column, the column head is attached to the column-beam joint. Fix the frame (B).

As shown in Figure 8, the column-beam joint formwork (B) consists of a rectangular tube-shaped mold made by the company (2) with both upper and lower end surfaces open, and a mold made by the company (2) branched out from the outer peripheral surface of the same type (2). The rib (4) in Fig. 0 is a stiffening rib formed integrally with a beam (3) having a groove-shaped cross section and communicating with the inner cavity of the same company's type (2) using a steel plate. Also(
5) is a temporary piece.

Next, a beam form (C) with built-in beam reinforcing bars (6) is connected between the beam forms (3) of the column-beam joint form (B) at the column heads of adjacent columns (A), and the floor ( D) supports installed on (
Supported by 7).

FIG. 9 shows a beam form (C), which is formed by oil-bottoming a thin steel plate into a groove shape, and has stiffening ribs (8) arranged on its surface.

Figures 10 and 11 show another embodiment of the beam formwork (C), in which the formwork is made of thin steel plate and has stiffening ribs ( 8) is processed by a press.

Note that the beam formwork (C) is supported on the support (7) via a stopper jig (E).

The same anti-preventing jig (F) has vertical anti-preparing pieces 0ω rotatably supported at both ends of the horizontal piece (9), and each vertical piece 0
(2) stands up and supports the side plate of the beam formwork (C) with its tip hook-shaped part (10a), and the vertical piece 00
is fixed to the horizontal piece (9) via a fixing pole 021 to prevent the side pieces of the beam formwork (C) from protruding outward due to the pressure of poured concrete.

In addition to being used as a support member for the beam formwork (C), the anti-holding jig (E) is also used for lifting the formwork.

Next, a ribbed slab part formwork (F) made of a thin steel plate is installed, floor reinforcing bars are arranged, and the concrete side of the slab is placed on the same formwork (E) on the same level as the above-mentioned column-beam joint formwork (B). Beam formwork (
In C), concrete 041 for the column-beam joint and concrete 051 for the beam are poured, respectively.

At this time, a supporting temporary cover aω of the column-beam joint concrete (141) is installed in the hollow portion of the column (A).

(See Figure 6 @) After the cast concrete has hardened, the next column (A') is erected as a waste form without removing each form, and the main reinforcement of the company (A') is Connect with main reinforcement (1) of column (A).

The steps described above are repeated to construct a reinforced concrete bridge.

Note that a steel column is placed in advance in the hollow cross section of the column (A),
The gap may be filled with concrete, and the column (A
) may be constructed using cast-in-place concrete, and furthermore, the beam form (C) is placed between adjacent columns, supported and fixed with supports, and then reinforcing bars are placed within the beam form (C). death,
Concrete may be placed.

(Effects of the Invention) According to the present invention, as described above, there is a cylindrical columnar shape with both upper and lower end surfaces open, and a groove-shaped beam extending from the outer periphery of the company's model and communicating with the inner cavity of the company's model. A column-beam joint formwork made of steel plate that is integrally connected with the mold is manufactured in advance, and the column-beam joint formwork is fixed to the column head of the column installed in a predetermined position, and the The beam formwork integrally formed with steel plates is connected between the formworks of the column and beam joints, and is supported on the floor via supports, and concrete is poured into each of the formworks to form the column and beam joints. The beam part is constructed simultaneously and integrally, and after the poured concrete has hardened, the next column is constructed on the column as a waste form without removing each form, Therefore, according to the present invention, the work of assembling and dismantling formwork, reinforcing bars, and reinforcing bars on site is eliminated, the work on site is significantly reduced, the construction period is shortened, and the construction cost is reduced.

In particular, the use of column-beam joint formwork significantly simplifies the construction of complex column-beam joints.

Further, the column-beam joint and beam formwork made of steel plates are lightweight, have high rigidity, are easy to handle, and require a minimum number of formwork ports.

In addition, if the latter upper floor column member is hollow, it can be supported by the column-beam joint mold mentioned above, and the column-beam joint, including the connection of column reinforcing bars, can be integrally molded, and it can also be used as a waste molding frame. The above-mentioned formworks can be used for ceiling finishing materials and for installing hanging fittings for piping.

[Brief explanation of drawings]

Figures 1 and 2 are front views showing the steps of example tl #1 of the method for constructing a reinforced concrete frame according to the present invention;
4 and 4 are a vertical side view and a perspective view showing the beam formwork support, respectively, FIG. 5 is a view taken along the arrow V-■ in FIG. 2, and FIG. Figure 7 is a view taken along arrows ■-■ in Figure 6, Figure 8 is a perspective view of the column-beam joint formwork, Figure 9 is a perspective view of the beam formwork, and Figures 10 and 11 are the beam forms, respectively. FIG. 7 is a perspective view showing another example of the frame. (A)...Precast concrete column (B)...
Column beam joint formwork (C)...Beam formwork ([1)...Floor (2)...Column type (3)...Beam type
(Ma)... q supports... slab concrete 041... column beam joint concrete 0... beam concrete jIAI flash

Claims (1)

[Claims] A steel plate column made by integrally combining a cylindrical column with open upper and lower end surfaces and a groove-shaped beam extending from the outer periphery of the column and communicating with the inner cavity of the column. The beam joint formwork is fixed to the column head of the column installed at a predetermined position, and then the beam formwork integrally formed with a steel plate is connected between the column and beam joint formworks of adjacent columns. , supporting the beam formwork on the floor via supports, then pouring concrete into the beam formwork and the column-beam joint formwork, and removing each of the formworks after the poured concrete has hardened. 1. A method for constructing a reinforced concrete structure, characterized in that a next column is constructed on top of the above column, and the above steps are repeated thereafter.