JPH0334536B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a PC board and a method of constructing an exterior wall using the PC board.

(Prior art) Recently, there are examples of exterior walls constructed of PC boards and cast-in-place concrete.
There is one in Publication No. 31293. In this example, a thin-walled PC
The exterior wall is constructed by using boards, positioning this PC board on the surface side of the exterior wall, and pouring cast-in-place concrete inside the PC board. The PC board and the inner concrete are connected by an inverted V-shaped anchoring reinforcing bar that protrudes from the inner surface of the PC board.

(Problems to be Solved by the Invention) However, according to the above example, the anchoring reinforcing bars protruding from the inner surface of the PC board become an obstacle during concrete pouring, making construction time-consuming and difficult to transport. Furthermore, since the main reinforcement of columns and beams arranged on site interferes with the main reinforcement installed protrudingly, there is a problem that the cost becomes unnecessarily high, such as having to increase the thickness of the concrete poured on site.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the PC board of the present invention is for forming an outer wall 1 together with a cast-in-place concrete wall to be cast on the inner surface. A plurality of PC board joining members 4 are continuously provided at intervals over the entire length of at least two opposing sides of the outer periphery of the PC board joining member 4, each PC board joining member being plate-shaped,
It is exposed from the inside of the PC board.

The exterior wall construction method of the present invention uses the above-mentioned PC board 2, and after erecting the PC board on the outer surface of the exterior wall, cast-in-place concrete is placed inside the PC board, and the PC board joining member 4 The outer wall is constructed by integrating the PC board and concrete 3 through the

(Function) The PC board 2 having the PC board joining member 4 provides a larger boundary reinforcement surface between the PC board, which is the precast concrete part, and the cast-in-place concrete by means of the PC board joining member 4 than when integrating means using reinforcing bars or the like. Therefore, it is integrated with the cast-in-place concrete 3 and has the function of strongly resisting horizontal forces in cooperation with the cast-in-place concrete.

(Example) Examples of the present invention will be described below based on the drawings.

In Figures 1 and 2, the outer wall 1 is placed on the front side.
It is composed of a PC board 2 and cast-in-place concrete 3 placed inside the PC board, and the PC board and cast-in-place concrete have PC board joining members 4,... It is integrated through

The PC board joining members 4 are thin block-shaped plates shown in FIG. It is exposed enough to perform the bonding function with concrete 3.

The method of attaching the PC board joining member 4 to the PC board 2 is as follows.
When manufacturing PC boards, after pouring concrete into the forming formwork and before the concrete hardens,
The lower surface of the board joint member 4 is embedded downward from the top surface of the concrete during curing to approximately half the thickness of the PC board joint member. Therefore, on the outer periphery of the PC board 2, a group of joining protrusions is formed by the PC board joining members 4 that are continuous at intervals. PC board joining member 4
functions as a means for mutually joining the PC board 2 and cast-in-place concrete 3 during exterior wall construction, which will be described later.

5 is a beam, and 6 is a column.

The placement position of the PC board joining member 4 is not limited to the entire inner circumference of the PC board 2, but may be placed on at least two opposing sides as long as it is within a sufficient design range. Alternatively, it may be provided only on the right side and the left side.

As shown in FIGS. 4 and 5, a large number of anti-separation fittings 7 may be provided protruding from a flat surface surrounded by the inner and outer periphery of the PC board 2 so as not to interfere with reinforcement arrangement. This will help prevent peeling between the PC board 2 and the cast-in-place concrete 3.

To explain the method of constructing the exterior wall 1 using the PC board 2, when manufacturing the PC board for the exterior wall, a plurality of plate-shaped PC board joining members 4 are placed at intervals on the outer periphery of the inner surface of the PC board, and each PC The PC board is manufactured by pre-casting concrete with the board joint members exposed from the inner surface of the PC board, and the PC board is first placed on the surface side of the exterior wall where it will be constructed. At this time, the PC board
The surface on which the plate joining member 4 is located is kept facing inward. Next, when a predetermined thickness of poured concrete 3 is placed on the inner surface of the PC board 2, the PC board and concrete are separated by the function of the PC board joining member 4, as shown in a partially enlarged view in FIG. are integrally combined. As a result, the PC board is not only used as formwork or finishing face plate during construction, but also works together with the concrete.
As an integral wall structure, it functions to resist horizontal forces (mainly seismic forces), and the PC board itself can be designed as a structure, providing a construction method that can reduce the thickness of concrete poured accordingly.

(Effects of the Invention) As explained below, according to the present invention, the PC board joining member, which is the means for joining the inner surface of the PC board, is plate-shaped, so there is no problem of obstruction during concrete pouring as in the conventional method. This solves the problem of difficulty in transporting. Since a plate-shaped body is used as the joining means, it is easy to install the joining means and to arrange reinforcement inside the PC board.
In addition, by constructing external walls using PC boards with PC board joining members, the PC board is strongly integrated with the cast-in-place concrete, so the PC board can be used as a structure in addition to functioning as formwork and finishing face plate. It can be designed and the thickness of cast-in-place concrete can be reduced.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view showing the construction state, Figure 2
The figures are a sectional view taken along the line shown in Fig. 1, Fig. 3 is a perspective view of the PC board joining member, Fig. 4 is a front view showing a state in which a peeling prevention metal fitting is protruded from the inner surface of the PC board, and Fig. 5 is a FIG. 3 is an enlarged cross-sectional view showing a state in which the peeling prevention fitting is attached. 1... Exterior wall, 2... PC board, 3... Cast-in-place concrete, 4... PC board joining member.

Claims (1)

[Scope of Claims] 1. A PC board for exterior walls, which includes a plurality of plate-shaped PC board joining members arranged continuously at intervals over the entire length of at least two opposing sides of the outer periphery of the inner surface of the PC board. A PC board characterized in that each PC board joining member is exposed from the inner surface of the PC board. 2. When manufacturing PC boards for exterior walls, a plurality of plate-shaped PC board joining members are placed at intervals along the entire length of at least two opposing sides of the outer periphery of the inner surface of the PC board, and each PC board joining member is connected to the PC board. A PC board is manufactured by pre-casting concrete with the concrete exposed from the inner surface, the above PC board is built on the outer surface of the outer wall, and cast-in-place concrete is placed on the inner surface of this PC board, and the PC board and cast-in-place concrete are combined. This is an exterior wall construction method that uses PC boards that are connected to each other via plate-shaped PC board joining members.