JP2849927B2 - Construction method of earthquake-resistant wall with large reinforcing block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a method for constructing an earthquake-resistant wall using a super-large reinforced concrete block.

(Prior Art) When constructing a conventional reinforced concrete shear wall, a series of on-site work of assembling a formwork and placing concrete occupies a large weight in the process.

(Problems to be solved by the invention) In recent years, with the worsening labor situation, the use of PCs in RC buildings has been promoted in order to improve productivity. However, there is a problem in a method of joining members.

The present invention has been proposed in view of such circumstances,
The purpose of this project is to add a reinforcement to a super-large concrete block and to construct a seismic wall with a large-sized reinforcement block that has the same performance as reinforced concrete in the same construction method as the block and that has been streamlined in construction. The point is to provide.

(Means for Solving the Problems) In order to achieve the above object, according to the method for constructing an earthquake-resistant wall using a large-sized reinforcing block according to the present invention, the upper and lower ends of a box-shaped large-sized concrete block having upper and lower ends open. In each of the sections, a strip-shaped steel sheet is installed along the inner peripheral surface of the hollow section of the block, and the hollow section of the large reinforcing block in which mesh bars are arranged between the upper and lower strip-shaped steel sheets is bent in a predetermined position. After the blocks are stacked to a predetermined height by being inserted into the reinforcing vertical bars, concrete is poured into the hollow portions of the respective blocks, and then the process is repeated while continuing the bending reinforcing vertical bars.

(Function) According to the present invention, at the upper and lower open ends of a large box-shaped concrete block, a strip-shaped steel sheet corresponding to the horizontal streak of the earthquake-resistant wall is installed along the inner peripheral surface of the cavity of the block, and the upper and lower strip-shaped steel sheets are installed. A large reinforcement block is arranged with mesh reinforcements to prevent cracks and to reinforce during transportation, and the hollow portion of the block is used as a guide for bending reinforcement vertical reinforcement set in advance to a predetermined position and using the reinforcement as a guide. After the blocks are inserted and thus the blocks are stacked to a predetermined height, concrete is poured into the cavity of each of the blocks, and each of the blocks forms a part of the earthquake-resistant wall integrated with the bending reinforcing steel. Assembling the earthquake-resistant wall by the block construction method by repeating the joining of the bending reinforcement bars, the insertion and stacking of the blocks into the bars, and the casting of concrete into the cavity of each block. It is something.

When a seismic force acts on the earthquake-resistant wall constructed as described above, the compressive force acting on the earthquake-resistant wall is reduced by the concrete filled in the cavity of the block, and the lateral tensile force is reduced by the concrete. The tensile force in the vertical direction is sufficiently transmitted by the upper and lower strip-shaped steel plates disposed on the inner peripheral surfaces of the upper and lower ends of the hollow portion, and the reinforcing bar disposed in the hollow portion.

(Example) Hereinafter, the present invention will be described with reference to an illustrated example.

(A) is a large-sized reinforcing block, and a pair of front and back protruding portions (2) are protruded from an end of a box-shaped concrete block (1), which is a main body of the block (A) and has open upper and lower end surfaces. . The projecting portion (2) is a member for improving the filling of the concrete of the vertical joint, and the block (1)
At one end or both ends.

The hollow portion (3) of the block (1) is formed in a rectangular cross-sectional shape as shown in FIG. 5, or as shown in FIG. 6, in a cross-sectional shape in which arc-shaped bands are continuously provided at both ends of the rectangular cross-section. It is formed.

The dimensions of the cavity (3) may be determined depending on the performance required for the earthquake-resistant wall and the convenience of transportation and assembly.

A strip-shaped steel plate (4) serving as a horizontal streak of the earthquake-resistant wall is integrally installed along the inner peripheral surfaces of the upper and lower ends of the cavity (3) in the concrete block (1). The mesh muscle (5) is arranged between the
The same mesh bars (5) prevent shrinkage cracks and demonstrate the function of reinforcing members during transportation.
Prevent blockage damage.

The strip-shaped steel plate (4) is provided with a width-stop plate (6) at an appropriate interval as necessary, and a guide plate (7) is welded so that the blocks can be stacked easily and accurately. .

The large reinforcing block (A) is produced in a factory and assembled on site.

Set the bending reinforcement vertical bars (8) in place in advance,
The hollow (2) of the large-sized reinforcing block (A) is fitted by using the reinforcing vertical bars (8) as a guide, and the blocks (A) are assembled in a staggered manner. (See FIGS. 12 and 13.) After the blocks (A) are stacked to a predetermined height, concrete is poured into the hollow portion. Next, the above-mentioned operation is repeated while connecting the reinforcing longitudinal bars (8) upward to construct a core earthquake-resistant wall.

When the multi-story shear wall constructed as described above receives seismic force, the flow of the force is as shown in FIG. The concrete acts compressive force in an oblique direction, which is divided into a compression force C ₂ by an arch effect flowing through the compressive forces C ₁ and the direct leg by truss action reaching the wall side. The role of lateral stripes of Thus to the wall is to take the reaction force of the compression force C ₁ by truss action. Therefore, also in the large reinforcing block (A), the tensile force T generated as a reaction force must be transmitted to the opposite side.

FIG. 15 shows a mechanism for transmitting the transverse tensile force T. The tensile force T is borne by the strip-shaped steel plates (4) arranged above and below the block T (A), but the transmission between adjacent blocks is performed. , Through the upper and lower strip steel plates (4) of the block (A).

That is, as shown in FIG. 15, the tensile force generated in the steel strip (4) is transmitted to the steel strip (4) of the upper block (A) by the compressive force C 'of the concrete. The signal is transmitted from the block (A) to the lower block (A). By repeating this, it is transmitted to the other side.

The compressive force is sufficiently filled by the concrete filled in the hollow portion (1) of the block (A), the transverse tensile force is sufficiently by the strip-shaped steel plates above and below the block, and the longitudinal tensile force is sufficiently by the reinforcing steel arranged in the hollow portion. Since it is transmitted, the shear wall constructed by the above method is expected to have the same performance as the reinforced concrete shear wall.

(Effects of the Invention) According to the present invention, at the upper and lower open ends of the box-shaped concrete block having the upper and lower ends open as described above, the belt-like shape plays the role of the horizontal streak of the earthquake-resistant wall along the inner peripheral surface of the cavity of the block. A large reinforcing block made of steel plate is inserted into a bending reinforcing vertical bar set in a predetermined position in advance as a guide and the vertical reinforcing bar is stacked to a predetermined height, and then concrete is poured into the hollow portion of each block. Then, since the shear strength was constructed by connecting the bending reinforcement and repeating the process, the conventional rebar assembly and formwork assembly work were performed.
Large-scale construction with the same performance as reinforced concrete, with the same construction method as the block masonry method, and with the same construction method as the block masonry method. A seismic wall will be constructed with reinforced blocks.

The size of the block may be arbitrarily determined depending on the performance required for the earthquake-resistant wall, transportation and heavy equipment, and is extremely flexible.

Furthermore, by arranging mesh bars between the strip-shaped steel plates installed along the inner peripheral surface of the block cavity at the upper and lower open ends of the block, the block is prevented from contracting and cracking and damaged during transportation. Is prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional side view of a large reinforcing block used in the method of the present invention, taken along the line II in FIG. 2, FIG. 2 is a partial longitudinal sectional view thereof, FIG. FIG. 4 and FIG. 4 are arrows III-I of FIG.
IV-IV, FIG. 5 and FIG. 6 FIG. 7 is a plan view and a front view of a box-shaped concrete block, respectively, and FIG. 8 and FIG. FIG. 10 is a plan view showing another embodiment of the block, and also a partial cross-sectional plan view,
FIGS. 11 and 11 are cross-sectional plan views each showing a reinforcing device for a strip-shaped steel sheet, and FIGS. 12 and 13 are front plan views and cross-sectional plan views each showing the state of implementation of a method of constructing a shear wall according to the present invention. FIG. 14 is an explanatory diagram showing the flow of force to the earthquake-resistant wall, and FIG. 15 is an explanatory diagram showing transmission of the tensile force in the lateral direction. (A) Large reinforcement block (1) Box concrete block (3) Cavity (4) Strip steel plate (5) Mesh reinforcement (8) Bending reinforcement Vertical streaks.

Claims (1)

(57) [Claims] 1. At the upper and lower open ends of a box-shaped large concrete block having upper and lower ends open, a strip-shaped steel plate is installed along the inner peripheral surface of the cavity of the block, respectively.
A hollow portion of a large reinforcing block, in which mesh bars are arranged between the upper and lower strip-shaped steel plates, is fitted into a bending reinforcing vertical bar set in a predetermined position in advance, and the blocks are stacked to a predetermined height.
After placing concrete in the cavity of each block,
A method of constructing an earthquake-resistant wall using a large-sized reinforcing block, wherein the step is repeated while continuing the bending reinforcing vertical bars.