JPH05141025A - Constructing method for reinforced concrete wall - Google Patents

Abstract

PURPOSE:To enable the arranging work of reinforcements to be simplified furthermore by connecting the vertical and horizontal reinforcements for composing main reinforcements, to shear connectors on PC board sides, in a state that the reinforcements are formed in the shape of a lattice. CONSTITUTION:A reinforced concrete wall is provided with an external wall board 1 formed with a PC board, and an internal wall board 2 formed with the PC board. On the surfaces confronted with each other, of the external wall board 1 and the internal wall board 2, a pair of wall main-reinforcements 6 formed in the shape of a lattice are arranged. On the surfaces confronted with each other, of the external wall board 1 and the internal wall board 2, a plurality of shear connectors 10 to be projected in the shape of a truss are arranged, and the wall main-reinforcements 6 are arranged to be positioned at the salient ends of the respective shear connectors 10, and the contact sections of both the ones are bound with a binding wire 11 formed with an annealed steel wire or the like, and then the wall main-reinforcements 6 are arranged to be fixed on the surfaces of the external wall board 1 and the internal wall board 2 with specified spaces (d). After this, when cast-in-place concrete is placed in a space D, then with an internal section with a pair of the wall main-reinforcements 6 between the internal and external wall boards 1, 2, an integrally formed cast-in-place reinforced concrete layer 12 is completed.

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 wall by using cast-in-place concrete as a discarding form for a PC plate, and relates to a method for constructing a reinforced concrete wall which simplifies the work of arranging the main wall reinforcement.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing a reinforced concrete wall, a formwork has generally been assembled, wall main bars have been laid inside the formwork, concrete is then placed inside the formwork, and the formwork is removed after the concrete hardens. The steps to take are taken.

In this construction method, a lot of labor and construction period are required for the formwork, and when the labor situation is bad, the construction period may be greatly delayed. Further, in this method, since the formwork and the bar arrangement are alternately performed, there is a drawback that the work is congested and complicated.

Therefore, the present applicant first arranges a pair of PC slabs as opposed to each other as a discarding form, arranges the main wall of the wall inside the PC slab, and then places concrete to make the PC slabs the inner and outer surfaces. It was proposed to construct a three-layer reinforced concrete wall. According to this construction method, since the PC plate is directly used as the wall surface, there is no need to remove the formwork.
No external scaffolding is required and the surface finish is good.

[0005]

However, this structure has a problem in connection workability between the main wall of the wall and the PC plate. For this reason, for example, in the prefabricated construction method disclosed in Japanese Patent Publication No. 2-1934, the shear connector was exposed on the PC plate and the vertical and horizontal reinforcing bars that were the main bars were entangled in this loop. Since the work of inserting the rebar into the loop and the work of assembling the grid are carried out continuously, there is a drawback that the work of arranging the work takes time.

The present invention is intended to solve the above problems, and an object thereof is to connect longitudinal and lateral reinforcing bars forming a main reinforcing bar to a shear connector on the PC plate side in a state of being formed in a grid pattern, thereby The present invention provides a method for constructing a reinforced concrete wall that can further simplify the reinforcing bar work.

[0007]

In order to achieve the above-mentioned object, the present invention provides a PC plate provided with a truss-shaped shear connector protruding on one surface in a state of being arranged regularly in the vertical and horizontal directions. By placing concrete so as to face the placing surface and placing the main wall reinforcement in the space on the concrete placing surface side, the PC
A method of constructing a reinforced concrete wall having a plate as a front surface side, wherein the wall main bars are formed in a lattice shape, and the wall main bars are connected to the tips of the shear connectors via binding wires, and the PC plates are A predetermined gap is provided between the two and they are opposed to each other.

[0008]

[Operation] By arranging the main bars preassembled in a grid pattern on the shear connector and connecting the contact portions of both with a binding wire,
The main wall wall can be placed integrally on the concrete placing surface of the PC plate with a predetermined gap, and in this state, if the PC plate is used as a formwork and the cast-in-place concrete is placed therein, both the PC plate and the main wall bar are A reinforced concrete wall in the connected state is built. Since the main bar is connected to the shear connector using a binding wire instead of welding, there is no risk of cross-section loss of the reinforcing bar due to welding, and therefore the structural strength of the wall after completion is not reduced. Or, it does not require any other jig and is safe because it does not use fire.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. In FIG. 1 (a), the reinforced concrete wall constructed by the method of the present invention has a floor reference plane FL.
An outer wall slab 1 made of a PC slab standing upright, an inner wall slab 2 made of a PC slab standing upright with a space D for placing concrete on the floor reference plane FL, and an upper wall of the inner wall slab 2 A beam form frame 4 that constitutes a beam portion assembled in an overhang shape via a mounting jig 3 is provided.

A pair of main wall reinforcements 6 are arranged on the opposing surfaces of the outer wall slab 1 and the inner wall slab 2. Further, a steel frame beam 7 made of I-shaped steel is longitudinally arranged in the interior surrounded by the beam form 4 and the outer wall slab 1, and the periphery of the steel frame beam 7 is surrounded by a beam reinforcing bar cage 8. ing. This rebar cage 8 is connected to the wall main bar 6 through a connecting rebar 9 connected to the upper part of the wall main bar 6.

Both the outer wall slab 1 and the inner wall slab 2 are so-called omnier plates or prestressed PC plates, and the opposing surfaces thereof are arranged in a truss shape in a state of being regularly arranged in the vertical and horizontal directions as shown in FIG. A large number of projecting shear connectors 10 are arranged. Further, the wall main bar 6 is constructed by preliminarily assembling the reinforcing bars 6a and 6b in a grid shape in the vertical and horizontal directions, connecting the intersecting positions with a binding wire such as annealed steel wire, and preliminarily assembled in a grid shape.

Then, as shown in FIG. 3, the preassembled grid-shaped wall main bars 6 are positioned and arranged at the projecting ends of the respective shear connectors 10, and a binding wire 11 made of a smoothed steel wire or the like is provided at a contact portion between them. By tying and tying them together, the wall main bars 6 are formed on the surfaces of the outer wall slab 1 and the inner wall slab 2 with a predetermined gap d.
It is fixedly arranged by opening.

The above work can be easily carried out by an assembly worker at a PC plate manufacturing factory or a construction site, and the outer wall plate 1 and the inner wall plate 2 with the wall main bars 6 assembled can be installed upright as shown in FIG. 1 (a). For example, a concrete pouring formwork will be constructed.

After that, when the cast-in-place concrete is cast in the space D and in the beam forming space formed between the beam molds 4 and 5 and the outer wall slab 1, as shown in FIG. 1 (b). The in-situ reinforced concrete layer 12 in which a pair of main wall reinforcements 6 are integrated between the inner and outer wall slabs 1 and 2 is completed. Since this concrete layer 12 is integrally connected to the inner and outer wall slabs 1 and 2 via the wall main reinforcement 6, it becomes a three-layer reinforced concrete wall having sufficient strength. If a compaction device such as a vibrator can be connected to the lower portion of each wall slab 1 and 2, concrete can be reliably rotated and compacted even if the space D is narrow, which can contribute to the improvement of quality.

In the embodiment, a reinforced concrete wall having a three-layer structure is used, but it goes without saying that a two-layer structure may be used. Further, as the main wall reinforcement, it is also possible to use a product which is preliminarily formed in a reinforcement grid, instead of a structure in which reinforcement is vertically and horizontally assembled.

[0016]

As described above in detail with reference to the embodiments, in the method for constructing a reinforced concrete wall according to the present invention, the main bars formed in a lattice shape are arranged on the shear connector, and the contact portions of both are arranged. By connecting with a binding wire, the main wall wall can be arranged facing each other integrally with a predetermined gap on the concrete placing surface of the PC plate with safety and simple work without reducing the strength of the wall body. It is greatly simplified compared to the conventional one, and construction efficiency can be improved.

[Brief description of drawings]

FIG. 1 (a) is a sectional view showing a state before placing concrete on a reinforced concrete wall according to the present invention. (B) is a cross-sectional view after the concrete is poured.

FIG. 2 is an exploded explanatory view showing a relationship between a PC-type shear connector and a wall main bar.

FIG. 3 is a partially enlarged cross-sectional explanatory view showing a connected state of a shear connector and a wall main bar.

[Explanation of symbols]

 1 PC version (outer wall version) 2 PC version (inner wall version) 6 Wall main bar 11 Bonding line 12 Cast-in-place concrete D Space d Gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Kuroiwa 2-3 Chome, Kandajimachi, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office

Claims (1)

[Claims] 1. A PC plate provided with a truss-shaped shear connector protruding on one surface in a state of being regularly arranged in the vertical and horizontal directions, is arranged such that the shear connector faces the concrete pouring surface, and the concrete pouring surface. By placing concrete with the main wall of the wall in the space on the side,
A method of constructing a reinforced concrete wall having a plate as a front surface side, wherein the wall main bar is formed in a lattice shape, the wall main bar is connected to a tip of each shear connector via a binding wire, and each PC plate is connected. A method for constructing a reinforced concrete wall, which is characterized in that a predetermined gap is provided between and facing each other.