JP2002173944A - Precast concrete slab and its installation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a precast concrete slab and its installation method allowing easy and efficient installation in the case of using the precast concrete slab as a form. SOLUTION: This precast concrete slab 1 is formed by protrusively providing sliding members 4 on the back face of the concrete slab 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a precast concrete plate and a method for installing the same.

[0002]

2. Description of the Related Art When a precast concrete plate is used as a formwork, as shown in FIGS. 17A and 17B, a precast concrete plate 28 continuously leaned in a lateral direction is separated by a separator passed through a joint. 29, a thick end piece 30 and a fastening fitting 31 or the like, or as shown in FIG.
Was joined to and supported by the truss bars 32.

[0003]

However, the former one of the above-mentioned installation methods cannot be efficiently installed due to the necessity of thick ends and the like, and the latter requires a hand between the wall surface and the precast concrete plate. It was a complicated operation to insert and join.

The present invention has been made in view of these problems, and an object of the present invention is to provide a precast concrete plate that can be easily and efficiently installed when a precast concrete plate is used as a formwork, and a method of installing the same. To provide.

[0005]

A means for solving the above-mentioned problems is characterized in that the precast concrete plate according to the first aspect of the present invention is provided with a slide member provided on the back surface of the concrete plate. The precast concrete plate of the invention according to claim 1 is characterized in that the slide member is installed on a truss bar on the back surface of the concrete plate, and the precast concrete plate of the invention according to claim 3 is according to claim 1 or 2. , Wherein the slide member is a concave female member, or a convex male member,
The precast concrete plate of the invention according to claim 4 is
In any one of claims 1 to 3, the outer surface of the concrete plate is finished, and the precast concrete plate of the invention according to claim 5 is the concrete plate according to any one of claims 1 to 4, A joint step is formed on the side surface, and the precast concrete plate of the invention of claim 6 is characterized in that, in any one of claims 1 to 5, the concrete plate is formed to be curved. The method for installing a precast concrete plate according to the invention of claim 7 is characterized in that the precast concrete plate is fitted on a guide member on a wall surface with a slide member on the back surface, and is slid along the guide member for installation. The method for installing a precast concrete plate according to claim 8 is the method according to claim 7, wherein the slide member is provided on a back surface of the concrete plate. And characterized in that it is installed in the scan muscle,
According to a ninth aspect of the present invention, there is provided the precast concrete plate according to the seventh or eighth aspect, wherein the slide member is a concave female member or a convex male member. In the method of installing a plate according to any one of claims 7 to 9, the concrete plate is formed to be curved.

When a precast concrete plate is used as a mold, a full precast concrete plate and a half precast concrete plate can be provided which can be easily and efficiently installed. The concave female member and the convex male member are easy to fit into the guide member,
And a smooth slide can be performed. A PC board that can also be used for finishing can be made with a cosmetic material. The adhesion at the joint between the precast concrete plates can be enhanced by the joint step. When a precast concrete plate such as a full precast concrete plate or a half precast concrete plate is used as a form,
Installation of the C plate can be performed simply and efficiently.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a precast concrete board (hereinafter referred to as a PC board) of the present invention and an installation method thereof will be described below with reference to the drawings. First, the seven embodiments of the PC board will be described, and then the embodiment of the installation method using the PC board will be described. The following description will be made by giving different reference numerals only to the configurations described above.

FIGS. 1 to 3 show a PC board 1 according to a first embodiment.
It is shown. The PC board 1 is a so-called half PC board in which an upper portion of the truss bar 3 projects from the back surface of the concrete plate 2, and a slide member 4 is attached to the truss bar 3. The PC board 1 is slid on a guide member (described later) by the slide member 4, and the slide member 4 is attached to the upper end muscles 5 of all the truss bars 3 at appropriate intervals in order to perform smoother slide. . In order to use the PC board as a finishing material, the surface of the concrete board 2 can be finished, that is, a decorative material 6 such as a tile can be attached or an arbitrary relief pattern can be drawn.

The slide member 4 is a concave female member and includes a slide member 7 and a fitting member 8. The fitting member 8 has a fitting groove 9 to be fitted to the upper end line 5. On the other hand, the slide member 7 is formed of a rectangular cylinder provided with a cutout groove 7a so that it can be fitted into the guide member of the T-shaped rail. Therefore, the slide member 4 is fixed so that the upper end streak 5 is sandwiched between the fitting grooves 9 of the fitting 8 as shown in FIG. The slide member 4 can be fixed by directly welding the slide tool 7 to the upper end streak 5 without using the fitting tool 8.

[0010] The truss bar 3 is a lattice bar 1 in which one upper bar 5 and two lower bars 10 arranged in a triangular shape are corrugated.
Although the truss is a triangular prism-shaped truss joined at 1, the upper end muscle 5 may be two vertically overlapping trusses, and one upper end muscle 5 and one lower end muscle 10 are joined by a lattice lattice 11 having a waveform. It may be a so-called single truss.

FIG. 4 shows a PC board 12 according to a second embodiment. The PC board 12 is obtained by arranging reinforcing bars 13 for walls in advance on the elongated truss bars 3, and has the same configuration as the PC board 1 of the first embodiment except for this. Thereby, the reinforcement of the wall reinforcing bars 13 can be arranged at the same time as the installation of the PC board 12, so that this arrangement operation can be omitted.

FIG. 5 shows a PC board 14 according to a third embodiment. This PC board 14 is used to make the slide member 4 a convex male member,
That is, the slide member 7 has a T-shape, and the other configuration is the same as that of the PC board 1 of the first embodiment. In this case, the guide member is a rail having the same shape as the slide member 7 of the PC board 1.

FIG. 6 shows a PC board 1a according to a fourth embodiment. This PC board 1a is a sliding member 7 which is a concave female member.
Is mounted as a top of the truss bar 3, that is, instead of the upper bar 5, and the other configuration is the same as the PC board 1 of the first embodiment. In this case, the guide member is a T-shaped rail.

FIG. 7 shows a PC board 1b according to a fifth embodiment. This PC board 1b is a sliding member 7 which is a concave female member.
Instead, a T-shaped rail, which is a convex male member, is attached to the top of the truss bar 3, and has the same configuration as the PC board 1 of the first embodiment except for this.

FIG. 8 shows a PC board 15 according to a sixth embodiment. This PC board 15 is provided on the side surface of the concrete board 2 with the joining step 1 in order to enhance the adhesion at the joint between the PC boards.
6 and the other configuration is the same as that of the PC board 1 of the first embodiment. Also, P
The joining accuracy at the joint between the C plates can also be improved.

FIG. 9 shows a PC board 17 according to a seventh embodiment. This PC board 17 is provided with a slide member 4 on a so-called full PC board. The PC board 17 can also be used as a finish by pasting a decorative material 6 such as a tile on the surface, and a joining step 16 is provided on the side surface to enhance the adhesion and the joining accuracy at the joints between the PC boards. You can also. The PC board 17 can also omit the reinforcement of the wall reinforcing bars 13.

FIG. 10 shows a PC board 19 according to an eighth embodiment. The PC board 19 is formed by forming the slide member 4 into a convex male member, that is, a T-shape. Further, the PC board 19a of (3) in the same figure is simply the slide member 4 shortened.

FIG. 11 shows a PC board 20 according to a ninth embodiment. This PC board 20 is obtained by bending a concrete board 2 to construct an inner wall of a tunnel or a shaft, and has the same configuration as the PC board 1 of the first embodiment except for this. This PC board 20 can also be used as a finish by pasting a decorative material 6 such as a tile on the surface, and a joining step 16 is provided on the side surface to enhance the adhesion and joining accuracy at the joints between the PC boards. It is also possible to arrange the reinforcing bars 13 for walls in advance.

FIG. 12 shows another embodiment of the slide member 4, in which a fitting 8 comprises a U-shaped streak 8a and a fixing plate 8
The fixing plate 8b is fixed to the upper end muscle 5 by tightening the fixing plate 8b with a nut 8c. The slide 7 is T
In addition to the shape, a rectangular tube as shown in FIG.

Hereinafter, a method of installing the PC board will be described. 13 to 15 show the construction of a new wall or retaining wall on a mountain retaining wall using the PC board 15 of the sixth embodiment.

First, a guide member 22 of a T-shaped rail is protruded from a mountain retaining wall 21. The guide member 22 can be adjusted in verticality by a nut 22a of an adjusting member. Next, a predetermined number of PC boards 15 are transported to the site, and the PC boards 15 are lifted one by one by a crane, and the slide member 4 on the back surface is inserted into the guide member 22 and slid by its own weight, whereby the guide member 22 becomes a separator. .

Then, by repeating the above operation, P
When the C-plates 15 are sequentially placed, a mold frame 23 is formed by these components, and the joints 24 between the PC boards are brought into close contact with the joint step 16.

Next, after reinforcing the wall reinforcing bars 13 in the formwork 23, concrete 25 is cast and the new wall 2
6 can be constructed, and the finishing process can be omitted by the decorative material 6 on the surface. In addition, since the joining step portion 16 is in close contact, it is possible to prevent the slag and the like of the cast concrete 25 from flowing out to the surface.

In this method of installing the PC board, the PC board 15 of the sixth embodiment is used, but the PC boards 1, 12, 14 of the first to fifth, seventh, and eighth embodiments are used. , 1
The installation method using 7, 19 is performed in the same manner as described above.
When the PC boards 14 and 19 of the third and eighth embodiments are used, the guide member 22 is a rail having the same shape as the slide member 7 of the PC board 1.

FIG. 16 shows the construction of the inner wall 27 of a tunnel or shaft using the PC board 20 of the ninth embodiment, which can be constructed in the same manner as described above. In this case as well, it is possible to omit the support work for supporting the PC board 20 from below, and to rationalize the construction and eliminate the work by using the PC board with the wall reinforcing bars 13 arranged in advance. be able to. Further, the joining step 1
6, the bonding portion 24 can be made to be in close contact, so that it is possible to prevent slag and the like from flowing out to the surface.

[0026]

When the PC board is used as a mold,
A full PC board and a half PC board that can be easily and efficiently installed can be provided.

The concave female member and the convex male member can be easily fitted into the guide member and can slide smoothly.

By finishing the surface of the concrete board, a PC board that can also be used for finishing can be formed.

By the joining step, the adhesion at the joining portion between the PC boards can be enhanced.

When a PC board is used as a mold, a PC board such as a full PC board or a half PC board can be installed simply and efficiently.

It is possible to efficiently construct a mountain retaining wall, an inner wall of a tunnel or a shaft, and to reduce the number of operations.

[Brief description of the drawings]

FIG. 1A is a plan view of a PC board according to a first embodiment,
(2) is a sectional view taken along line AA of (1).

FIG. 2 is a sectional view taken along line BB of FIG. 1 (1).

FIG. 3A is a perspective view of a truss streak, and FIG. 3B is a perspective view of a slide member.

FIGS. 4A and 4B are PCs according to a second embodiment;
It is sectional drawing of a board.

FIGS. 5A and 5B are PCs according to a third embodiment;
It is sectional drawing of a board.

FIG. 6A is a plan view of a PC board according to a fourth embodiment,
(2) is a sectional view taken along line CC of (1).

FIG. 7 is a sectional view of a PC board according to a fifth embodiment.

FIG. 8 (1) and (2) are PCs according to a sixth embodiment.
It is sectional drawing of a board.

FIG. 9A is a plan view of a PC board according to a seventh embodiment,
(2) is a sectional view taken along line DD of (1).

10A is a plan view of a PC board according to an eighth embodiment, FIG. 10B is a cross-sectional view taken along the line EE of FIG. 10B, and FIG. 10B is a cross-section of a PC board according to another embodiment. FIG.

FIGS. 11 (1) and (2) show P in the ninth embodiment.
It is sectional drawing of C board.

FIG. 12A is a front view of a slide member according to another embodiment, and FIG. 12B is a side view of the slide member.

13A is a horizontal cross-sectional view illustrating a method of installing a PC board, and FIG. 13B is a cross-sectional view illustrating fitting of a slide member and a guide member.

FIG. 14A is a vertical sectional view showing a method of installing a PC board, and FIG. 14B is a side view of a guide member.

15A is a front view of a mold formed by joining PC boards, and FIG. 15B is a cross-sectional view of a joint between the PC boards.

FIG. 16 is a cross-sectional view showing a method of installing a PC board for constructing the inner wall of the tunnel.

FIG. 17A is a front view showing a conventional method for installing a PC board, and FIGS. 17A and 17B are cross-sectional views showing a conventional method for installing a PC board.

[Explanation of symbols]

1, 1a, 1b12, 14, 15, 17, 19, 20,
28 PC board 2 Concrete board 3, 32 Truss bar 4 Slide member 5 Top bar 6 Cosmetic material 7 Slide tool 8 Fitting tool 9 Fitting groove 10 Lower chord bar 11 Lattice bar 13 Reinforcing bar for wall 16 Joining step 18 Insert fitting 21 Retaining wall 22 Guide member 23 Formwork 24 Joint 25 Concrete 26 New wall 27 Inner wall 29 Separator 30 Thick material 31 Clamping fitting

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toumitsu Hinuma 3-15-7 Higashi, Shibuya-ku, Tokyo F-term (reference) in Japan Kaiser Co., Ltd. 2D048 AA83 2D055 DA01 EB01 GB01 KB07 KC00

Claims (10)

[Claims] 1. A precast concrete plate wherein a slide member is provided on a back surface of the concrete plate. 2. The precast concrete plate according to claim 1, wherein the slide member is installed on a truss bar on the back surface of the concrete plate. 3. The precast concrete plate according to claim 1, wherein the slide member is a concave female member or a convex male member. 4. The precast concrete plate according to claim 1, wherein the outer surface of the concrete plate is finished. 5. The precast concrete plate according to claim 1, wherein a joining step is formed on a side surface of the concrete plate. 6. The precast concrete plate according to claim 1, wherein the concrete plate is formed to be curved. 7. A method for installing a precast concrete plate, wherein the precast concrete plate is fitted to a guide member on a wall surface with a slide member on a back surface, and is slid along the guide member. 8. The method according to claim 7, wherein the slide member is installed on a truss bar on the back surface of the concrete plate. 9. The method according to claim 7, wherein the slide member is a concave female member or a convex male member. 10. The precast concrete plate according to claim 7, wherein the concrete plate is formed to be curved.