JPH01315525A - Snowslide preventing and slope stabilizing structure - Google Patents

Abstract

PURPOSE:To prevent a snowslide from occurring by forming a protrusion which is overhung in four sides from a central part, while forming a snowslide preventive part, being protruded upward, in this central part. CONSTITUTION:A protrusion overhanging in four sides from a central part 1 is formed so as to cause the vicinity of the central part 1 to be the highest and to make height lower by degrees in proportion as going to the tip end. In addition, a snowslide preventive part 3 jutting out to the upper part is formed in the central part 1, thereby forming a natural ground stabilizing structure A.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a structure placed on a mountain for avalanche prevention and slope stabilization.

[Prior Art] Various construction methods have conventionally existed for slope stabilization. For example, the block construction method involves lifting precast concrete blocks up a slope and arranging them on the ground to prevent the ground from collapsing.

The method of constructing a slope is to arrange formwork vertically and horizontally on other piles, and pour cement-based hardening material into the formwork to construct a slope and prevent the collapse of the pile.

[Problems to be Solved by the Invention] The problem with the above-described block construction method is that lifting a large number of heavy blocks up a slope requires a lot of effort.

In the framing process, it is difficult to assemble the formwork on the entire slope on-site, and hardened material cannot be poured until the entire slope is assembled, resulting in a long construction period. Furthermore, the slope is continuous over the entire slope, making structural calculations complicated.

In addition, none of the above structures for stabilizing slopes discloses a structure for preventing avalanches.

This invention was made in order to solve the above-mentioned problems, and the purpose is to provide a slope stabilizing structure that is easy to install, can shorten the construction period, and has good adhesion to the ground. shall be.

Another object of the present invention is to provide an avalanche prevention and slope stabilization structure capable of preventing avalanches.

[Means to solve the problem]

The avalanche prevention and slope stabilization structure according to the present invention is formed into a cross shape with a central portion and overhanging portions extending in all directions from the central portion. An avalanche prevention part is formed in the center and projects upward.

The overhang may be gradually lowered from the center to the tip.

An anchor insertion hole passing through in the vertical direction may be provided in each of the four overhanging portions.

(Function) The overhanging parts protrude in all directions, and by placing it on the ground and fixing it to an anchor, it is possible to hold down a large area of the ground with one structure.

Insert the anchor into the anchor insertion hole of each overhang and fix it to the other thread.

〔Example〕

Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

What is shown in FIGS. 1 and 2 is an avalanche prevention and mountain stability structure A according to the present invention, which is made of precast concrete. Structure A consists of a central part 1 and this central part 1.
It is formed into a cross shape by overhanging portions 2 extending in all directions from the top.

The overhanging portion 2 is highest near the center portion 1 where the most stress is applied, and the height gradually decreases toward the tip.

In the embodiment shown in FIGS. 1 and 2, the avalanche prevention section 3 is formed in the center part 1 and projects upward. , facing toward the tip of each overhang 2. Other Figure 6 1. As shown in (2), the diagonal line connecting each corner of the quadrangular prism-shaped avalanche prevention part 3 may be formed to be parallel to the longitudinal direction of the overhang part 2.

In addition, the avalanche prevention section 3 can have various shapes such as a cylindrical shape and a hexagonal column shape.

An anchor insertion hole 4 penetrating in the vertical direction is formed at each tip of the overhanging portion 2 extending in all directions.

Inside the structure A as described above, there is a structure shown in FIG. Reinforcement bars can be arranged as shown in H. That is, a plurality of main reinforcements 5 are vertically erected from the center portion 1 toward the avalanche prevention portion 3, and the main reinforcements 5 are surrounded by auxiliary reinforcements 6. A plurality of main reinforcing bars 7 are arranged from below the main reinforcing bars 5 toward the four sides of the overhanging part 2, and are similarly surrounded by auxiliary bars 6.

Although the structure A according to the present invention can be manufactured in a factory,
It may also be formed by pouring concrete into the formwork on site. In other words, although it is possible to assemble a formwork made of synthetic board around the outer periphery of the reinforcing bars as shown in Fig. 3 and pour concrete, an assembly formwork 8 made of lath as shown in Figs. 4 and 5 is used. You may. Figure 41. The one shown in FIG. The one shown in H is one in which the upper surface is not covered with a lath.

Concrete is poured into such a formwork 8 and buried. The lath is metal lath.

Extracted metal etc. can be used.

In addition, as the structure A, a structure made of precast concrete as shown in FIG. 12 can also be adopted. Filling holes 9 are formed in each of the overhanging parts 2, penetrating up and down, and concrete is poured into these filling holes 9 after being carried to the site. The weight of the divided relic A with the filling hole 9 formed becomes lighter, and it becomes easier to carry it to the site. In addition, the concrete poured into the filling hole 9 adheres closely to the ground, and the structure A
and the integration of the ground becomes good.

The structure A as described above is placed on the ground.

An anchor 10 is driven into the earth, and the part of the anchor 10 protruding from the earth is inserted into the anchor insertion hole 4 of the structure A and fixed with a nut or the like. As the anchor 10, a rock bolt, a rock anchor, a ground anchor, etc. can be adopted.

When the structures A are arranged on the ground, the overhangs 2 to each structure may be arranged vertically and horizontally as shown in FIG. The two structures A may be consecutively arranged so that the corner projecting portions 2 of the structures A butt each other. If the slope is relatively stable, they may be arranged at intervals as shown in FIG. 9 or 10.

When the structure A is placed on the ground as described above, the avalanche prevention section 3 stands up on the ground.

If an avalanche occurs on the slope, the avalanche prevention part 3 of this structure A
This supports the snow and prevents it from falling below.

〔Effect of the invention〕

The present invention has the above configuration and can obtain the following effects.

■ The structure has overhanging parts that extend in all directions, and one structure can stabilize a relatively wide area. Therefore, instead of using a large number of members as in the block construction method, or assembling formwork continuously over the entire slope as in the sill construction process, which is cumbersome, multiple structures can be placed at appropriate intervals. By doing so, you can easily stabilize the entire slope. Furthermore, since the structure is a single unit, structural calculations are easy.

@ The structure has an avalanche prevention part that protrudes upward,
This avalanche prevention section can dam the snow and prevent further snow from falling.

0 If the height of the center of the structure is increased, the strength of the center of the structure where a large bending moment acts will be increased, resulting in a strong slope stabilizing structure.

■ Anchors can be inserted into each anchor insertion hole in the overhang and firmly fixed to the ground.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the avalanche prevention and slope stabilization structure according to the present invention, Fig. 2 is a side view thereof, and Fig. 3 is a reinforcement arrangement diagram, where I is a plan view and II is a plan view. is a side view, 4th
The figure and Figure 5 show the formwork, each I is a plan view, each
6 is a side view, FIG. 6 shows another structure, and I is a plan view. (2) is a side view, FIGS. 7 to 10 are plan views showing examples of the arrangement of structures, FIG. 11 is a side view thereof, and FIG. 12 is a perspective view of other structures. A...Structure, 1...Central part, 2...Overhanging part, 3...Avalanche prevention part, 4
・・Anchor insertion hole, 5, 7・・Main reinforcement, 8・・Formwork, 1
0... Anchor. Figure 3■ Figure 6■ Figure 5!

Claims (3)

[Claims] (1) Avalanche prevention and slope stabilization characterized by a cross-shaped structure consisting of a central part and overhanging parts protruding in all directions from the central part, and an avalanche prevention part protruding upwardly formed in the central part. Structures for use. (2) The avalanche prevention and slope stabilization structure according to claim (1), wherein each of the four overhanging portions is provided with an anchor insertion hole penetrating in the vertical direction. (3) The avalanche prevention and slope stabilization structure according to claim (1), wherein the overhang portion is gradually lowered from the center to the tip.