JPS5944465A - Building of precast concrete wall panel - 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 The present invention relates to a method of constructing a precast concrete wall board.

Conventionally, when constructing precast concrete wall boards, a lifting hook is buried in the wall board separately from the joining devices such as joining reinforcing bars and joining metal fittings, and the wall board is lifted by the lifting hook.
It was built in place and the upper and lower wall panels were joined.

The present invention omits such lifting hooks and uses the main wall reinforcement itself as a lifting tool, simplifying the structure of the wall board.
This was proposed for the purpose of simplifying construction, and the main wall reinforcement is made of deformed reinforcing bars with spiral ridges integrally formed on the outer circumference, and the upper end of the main reinforcement is above the plate. A lifting tool is screwed onto the spiral ridge of the upper end protrusion of the wall main reinforcement in a precast concrete wall board buried so as to project upward from the end surface, and then the wall board is lifted up via the lifting tool. erected on top of a lower precast concrete wall plate that has been erected in a predetermined position, and the upper end protrusion of the main wall reinforcement in the lower wall plate is connected to the lower end of the main wall reinforcement in the upper wall plate. This relates to the construction method of precast concrete wall plates.

In the present invention, as described above, deformed reinforcing bars (threaded reinforcing bars), which are formed by integrally protruding spiral ridges on the outer circumferential surface of the core of the reinforcing bars, are used as the wall main reinforcement of the precast concrete wall plate, and the surrounding wall The main reinforcement is buried in the wall board so that its upper end protrudes above the upper end of the plate, and a lifting tool is screwed onto the upper end protrusion of the wall main reinforcement in the wall board using its spiral protrusion. It is something to do.

In this way, the wall board is lifted using a lifting tool screwed onto the upper end protrusion of the main wall reinforcement of the wall board, and is immediately erected on top of the lower precast concrete wall board that has been erected in a predetermined position. The upper end protrusion of the main wall reinforcement in the lower wall board and the lower end of the main wall reinforcement in the upper wall board are joined, and the same steps as described above are repeated to erect and join the precast concrete wall board at a predetermined position. , to construct the required walls.

In this way, the present invention utilizes the spiral ridges provided on the outer periphery of the deformed reinforcing bars constituting the wall main reinforcement of the precast concrete wall plate to improve the cross-sectional performance and increase the adhesion force to the concrete. By screwing the lifting device onto the upper end protrusion of the wall plate of the wall main reinforcement, there is no need to embed the lifting device in the wall plate separately from the joining device as in the past. The trap can be used not only as a mounting member for joining wall plates but also for lifting, which simplifies the structure and simplifies construction.

Further, after the upper and lower wall plates are joined, the lifting tool can be easily removed from the upper end protrusion of the main wall reinforcement and can be reused.

The present invention will be described below with reference to illustrated embodiments.

(1) is the wall main reinforcement, and the surrounding wall main reinforcement (1) is the reinforcement trunk body (1α
) is composed of deformed reinforcing bars (threaded reinforcing bars) with spiral ridges (1h) integrally formed on the outer circumferential surface thereof.

The main wall reinforcement (1) is a precast concrete wall plate (A
The upper end of the main reinforcement (1) projects upward from the upper end of the wall plate, and a sleeve (2) for joining the reinforcing bars is attached to the lower end. (See Figure 1) Next, a lifting tool (3) is screwed onto the upper end protrusion of the main wall reinforcement (1). (See Figure 2) The lifting tool (3) is attached to the horizontal base piece (3h) on which the lifting hook (3α) is mounted.
The nuts (31?) communicating with the reinforcement insertion holes in b) are integrally connected, and the lifting tool (3) is connected to the spiral protrusion of the upper end protrusion of the main wall reinforcement (1) by the nuts) (3c). It is screwed onto the ridge (1h). (See Figure 7) Also, as shown in Figure 8, fit the horizontal base piece (3h) into the upper end protrusion of the main wall reinforcement (1) until it collides with the upper end surface of the wall plate (AI), and The lifting tool (3) may be screwed onto the upper end protrusion of the main wall reinforcement (1) by screwing and tightening the nut (3c).

Next, the wall plate (A) is lifted using the lifting tool (3), and is immediately erected at a predetermined position above the lower precast concrete wall plate (A') which has been erected at a predetermined position.
(See Figure 3) The main wall reinforcement (1) of the upper wall plate (4) and the main wall reinforcement (1) of the lower wall plate (A') are connected via the sleeve (2) (see Figure 5). Remove the lifting tool (3) attached to the upper end protrusion of the main wall reinforcement (1) of the wall board (A) (see Figure 4), and repeat the same process to join the precast wall board upward. It's something to do.

In addition, the main wall reinforcements (1) (1) of each of the upper and lower wall plates (A) rA')
In addition to being joined through the sleeve (2) as shown in the previous embodiment, the sleeves may be joined through a box metal fitting (2') as shown in FIG.

Although the present invention has been described above with reference to embodiments, the present invention is of course not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. be.

[Brief explanation of drawings]

1 to 4 are front views showing the steps of an embodiment of the precast concrete wall board construction method according to the present invention, FIG. Figure 6 is a partial slope view of the main wall reinforcement, Figures 7 and 8 are front views showing the attachment part of the lifting tool, respectively, and Figure 9 is a vertical cross-sectional view showing another example of the connection of the main wall reinforcement of the upper and lower wall plates. It is. (A)...Precast concrete wall board, (
A')...lower precast concrete wall board, (
1)...Wall main reinforcement, (1h)...Spiral ridge,
(2)...Sleeve. (2')...Box hardware, (3)...Lifting equipment, agent, patent attorney, two people including Shigemon Okamoto, Figure 1, Figure 2, Figure 3, Figure 6, Figure 7, Figure 8.

Claims (1)

[Scope of Claims] Main wall reinforcements made of deformed reinforcing bars whose outer peripheral surface is integrally formed with spiral protrusions are buried so that the upper ends of the main reinforcements protrude upward from the upper end surface of the plate. A lifting tool is screwed onto the spiral protrusion of the upper end protrusion of the main wall reinforcement in the precast concrete wall board. Next, the wall plate is lifted up using the lifting tool and placed on top of the lower precast concrete wall plate that has been erected at a predetermined position, and the upper end protrusion of the main wall reinforcement of the lower wall plate and the main wall reinforcement of the upper wall plate are connected to each other. A construction method for precast concrete wall boards characterized by joining the lower end.