JPS61254734A - Connection of precast steel panel concrete wall - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a method for joining precast steel plate concrete walls that are constructed by joining on-site steel plate concrete walls that are precast load-bearing walls for large-scale buildings such as nuclear reactor buildings. It is.

(Problem to be solved by the invention) Large load-bearing walls such as in nuclear reactor buildings are generally constructed on-site, but this method involves joining precast steel plate concrete walls on-site to improve the efficiency of on-site work. is taken. In this case, the joining is performed by welding together the steel plates that protrude from the wall surface to the joining end surface.

However, this method of welding steel plates is complicated and increases the number of steps, making it difficult to shorten the construction period and improve efficiency, making it impossible to take full advantage of the advantages of precast construction.

This invention was made to take advantage of the advantages of precast construction, and aims to speed up on-site work with simple means.

(Means for Solving the Problems) In the present invention, a reinforcing bar cage is installed at the joint X portion between precast steel plates and concrete walls, and then concrete is poured to perform the joint.

The reinforcing bar cage consists of main longitudinal bars, hoops, and spiral bars. Loop bars are horizontally protruded from the joint end of the steel plate concrete wall, and the joint is made after the reinforcing bar basket and the steel plate concrete wall are installed in the specified position. , Reinforcement is placed by inserting through reinforcement into loop reinforcement, hoop reinforcement, and spiral reinforcement, and concrete is poured.

(Example) The present invention will be described below with reference to drawings showing embodiments.

In this joining method, a reinforcing bar A is installed at a predetermined joint a, a precast steel plate concrete wall B (hereinafter referred to as SC wall B) is placed abutting each other with the reinforcing bar A sandwiched between them, and through-bars C are arranged. concrete D is poured.

Rebar cage A has hoop 2 surrounding vertical reinforcement 1, which is the main reinforcement.
and spiral stripes 3, and a coupler 4 is attached to the joint portion of the longitudinal strips 1.

Both wall surfaces 5, 5 on the SCC wall are made of steel plates, this steel plate serves as a formwork, and the space between the wall surfaces 5, 5 is filled with concrete 6. Also, a plurality of loop lines 8 are horizontally protruded from the joint end surface 7 and arranged vertically. This SCC wall is manufactured by filling it with concrete 6 mainly in a factory, but the concrete 6 is filled with concrete 6 at the joint part a on site.
It may be placed at the same time as pouring.

The through bars C are placed in the loop bars 8 on the SCC wall to engage with the reinforcing bar baskets A, and the loop bars 8.
7- Insert through the tube 2 and spiral muscle 3.

The joining procedure is as follows.

As shown in FIG. 2, first install the reinforcing bar basket A by suspending it from the joint a, and connect the loop bars 8 to the hoop 2 so that the loop bars 8 on the SCC wall alternate with the hoops 2 and spiral bars 3.
, is inserted between the pitches of the ulnar spiral muscle 3. Next, place reinforcement C, assemble the formwork, and complete the construction! J
-) Pour D.

How to place SCC on the wall at joint a depends on the shape of the building,
Depending on the joint location, it will be as shown in FIGS. 3 to 8.

Figure 3 shows a straight part, Figure 4 shows a part of a corner, Figure 5 shows a T-shaped part, Figures 6 and 7 show a cross-shaped part, and Figure 8 shows an example of joining a F-shaped part. It is something that The number of through-bars C, the reinforcement locations, and the manner in which the reinforcing bar baskets A are assembled are adjusted accordingly in accordance with the arrangement of each joint a, that is, the SCC on the wall. Further, as shown in FIGS. 4 and 7, the steel plate of the wall surface 5 can be made to protrude from the joint end face 7 to produce an SCC wall, and the protruding steel plate can be used as a formwork when pouring concrete D.

9 and 10 show details of the joint end surface 7. FIG. 4. The SCC wall joint end surface 7 is made of steel plate like both wall surfaces 5, 5,
It also serves as a formwork during production. A dowel 9 that enhances adhesion to the concrete D and a horizontally protruding loop reinforcement 8 are joined to the joint end surface 7 by welding or the like. FIG. 10 shows an example of joining the loop muscles 8. Here, both wall surfaces 5,
The anchor part 8a of the loop reinforcement 8 is passed through the joint end surface 7 and welded to the section steel 10 joined to the inside of the joint 5. As long as the loop reinforcement 8 is firmly connected to the joint end surface 7, other welding means may of course be used, or a method in which the anchor part 8a is penetrated through the joint end surface 7 and buried in the concrete 6 may also be used. The same applies to Jibel 9.

(Effects of the invention) This invention has the above-mentioned configuration, and the only on-site work is installing a precast reinforcing bar cage and a steel plate concrete wall, arranging through-bars, and pouring concrete, so the construction is streamlined. This will shorten the construction period.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an example of a building according to the present invention, and FIG. 2 is a front view and a sectional view showing the construction procedure. FIG. 3 is a sectional view and a front view showing an embodiment of the present invention, and FIGS. 4 to 8 are sectional views showing other embodiments. FIG. 9 is a plan view showing the joint of a steel plate concrete wall, ■ is a vertical sectional view thereof, and ■ is a front view. FIG. 10 is a sectional view showing an example of loop reinforcement welding. A: Reinforced cage, B: Precast steel plate concrete wall, C
: Through reinforcement, D: Concrete reinforcement: Joint, 1: Vertical reinforcement, 2: Hoop 3: Spiral reinforcement, 4: Coupler, 5: Wall surface 6: Concrete, 7: Joint end surface 8: Loop reinforcement, 8a: Loop reinforcement Anchor part 9 nijibel, 10: section steel. 9 Figure ■ 10 Figure ■ ■ iU

Claims (1)

[Claims] (1) After installing a reinforcing bar cage made of vertical bars, hoops, and spiral bars at a specified joint, both walls are made of steel plates, concrete is filled between the walls, and multiple loops are placed on the joint end face. A precast steel plate characterized in that precast steel concrete walls with horizontally protruding reinforcements are arranged so as to butt against each other at joints, and then concrete is poured by inserting through reinforcements into hoops, spiral reinforcements, and loop reinforcements. How to join concrete walls.