JP5534356B2 - Precast plate for slope reinforcement method - Google Patents

Description

  The present invention relates to a precast plate used for a method of reinforcing a slope, that is, a natural steep slope, a cut slope, or a slope that has been subjected to surface protection.

  Conventionally, as a precast plate used for the slope reinforcing method, it has a rectangular precast plate main body and a cover body fitted into a rectangular concave portion formed in the center of the surface of the precast plate main body. A metal plate is provided at the bottom, a hole penetrating the plate and the precast plate body is formed in the center of the recess, and a nut receiving recess is formed in the center of the back surface of the cover body. Installed on the slope, injecting backfill material into the gap with the slope, drilling through the backfill layer from the through hole of the precast plate body, drilling into the slope side, and injecting grout material into this drilled part, rod-like After the reinforcing material is inserted into the drilled hole and the grouting material is cured and hardened, a nut is screwed and fastened to the protruding end of the rod-shaped reinforcing material via a washer, and the nut receiving recess is inserted into the recess of the precast plate body. It is fitted to the cover body loaded with mortar within, and the like to reinforce the slope (e.g., see Patent Document 1).

JP 2010-106433 A

  However, in the above prior art, when a substantially vertical construction surface is reinforced, when a strong impact such as an earthquake is applied, there is a possibility that the cover body may come off from the recess, although it is very slight. There was a problem that had to be solved.

  The present invention is based on the above prior art, and in view of the problem that the cover body is likely to come off, the rectangular precast plate main body and the rectangular concave portion formed in the center of the surface of the precast plate main body A cover plate that fits into the recess, a metal plate is provided at the bottom of the recess, a hole that penetrates the plate and the precast plate body is formed in the center of the recess, and a nut-receiving recess in the center of the back surface of the cover body Forming a protruding rod on the surface of the plate, providing an insertion hole for the protruding rod on the back surface of the cover body, and fitting the cover body into the recess of the precast plate body installed, When the protruding rod of the precast board body is inserted into the insertion hole, the integrity of the precast board body and the cover body is solidified by solidifying the adhesive filled in the insertion hole. In the manner to improve, to solve the above-mentioned problems.

  In short, the present invention has a rectangular precast plate main body and a cover body that fits into a rectangular concave portion formed at the center of the surface of the precast plate main body, and a metal plate is provided at the bottom of the concave portion. In addition, a hole is formed through the plate and the precast plate main body in the center of the recess, and the nut housing recess is formed in the center of the back surface of the cover body, and a protruding bar is formed on the surface of the plate, Since the insertion hole for the protruding bar is provided on the back side of the cover body, if the cover body is inserted into the recessed portion of the installed precast board body, the protruding bar of the precast board body is inserted into the insertion hole filled with adhesive. Because the integrity of the adhesive improves the integrity of the precast board body and the cover body, strong impacts such as earthquakes act to fix the cover body to the precast board body Even fixing strength Rutaru has event loss can be reliably prevented from falling off the cover member from the recess.

  Since the protruding rod is not required until the final process, the protruding rod is a screw rod, and the lower end is screwed into a bolt hole formed in the plate and is integrally formed with the plate. Therefore, since the work before the final process, that is, before the cover fitting process, can be performed, the practical effect such as smooth operation can be achieved without interfering with the previous work.

It is a front view of the precast board for slope reinforcement construction methods concerning the present invention. It is a principal part cross-sectional enlarged view of the decomposed | disassembled precast board. It is a longitudinal cross-sectional enlarged view of the reinforced cut surface which uses the precast board of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
In the precast plate for slope reinforcement method according to the present invention, as shown in FIGS. 1 and 2, a rectangular precast plate main body 1 and a rectangular shape formed at the center of the surface of the precast plate main body 1. And a cover body 3 fitted into the recess 2.
In the precast plate body 1, a metal plate 4 is provided at the bottom of the recess 2, and a hole 5 that penetrates the plate 4 and the precast plate body 1 is formed in the center. The protruding rod 6 shorter than the depth is integrally formed.
In the cover body 3, it is preferable that the nut accommodating recess 7 is formed in the center of the back surface, the insertion hole 8 of the protruding rod 6 is provided on the back surface, and the insertion hole 8 is a non-through hole.

In the drawing, the protruding rod 6 is a screw rod and is integrally formed in the plate 4 by screwing the lower end into a bolt hole 9 formed in advance in the plate 4. May be formed integrally with the plate 4 by welding or the like.
The bolt holes 9 are formed by screwing a grout material pressure injection jig (not shown) to screw the precast plate body 1.

Then, as shown in FIG. 3, after the precast plate body 1 is installed on the slope S, the mortar M is placed in the recess 2 of the precast plate body 1, the mortar M is placed in the nut receiving recess 7, and the adhesive B is placed in the insertion hole 8. When the covered cover body 3 is fitted, the protruding rod 6 of the precast board body 1 is inserted into the insertion hole 8, and the integrity of the precast board body 1 and the cover body 3 is increased by the solidification of the adhesive B, for example solidification. Even if the fixing force of the mortar M is lost, the mortar M does not fall off the recess 2.
In particular, it is considered that the cover body 3 is more likely to fall if the slope S is close to vertical, but the cover body 3 does not fall off regardless of the inclination angle of the slope S if the precast plate according to the present invention.

  In the present specification, “adhesive” is used as a general term for resin-based adhesives and cement-based adhesives such as mortar.

DESCRIPTION OF SYMBOLS 1 Precast board main body 2 Recessed part 3 Cover body 4 Plate 5 Through-hole 6 Protruding rod 7 Nut accommodation recessed part 8 Insertion hole 9 Bolt hole

Claims (2)

A rectangular precast plate main body, and a cover body that fits into a rectangular recess formed in the center of the surface of the precast plate main body, and a metal plate is provided at the bottom of the recess, and the center of the recess Forming a hole penetrating the plate and the precast plate body, and forming a nut housing recess in the center of the back surface of the cover body,
A precast plate for slope reinforcement, wherein a protruding bar is formed on the surface of the plate, and an insertion hole for the protruding bar is provided on the back surface of the cover body.   2. The precast plate for slope reinforcement according to claim 1, wherein the projecting rod is a screw rod, and the lower end is screwed into a bolt hole formed in the plate and is integrally formed with the plate.

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