JPH0533533Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is an avalanche protection system installed on mountain slopes to protect roads, railways, etc. from avalanches, falling rocks, or collapsed soil.
Regarding protective walls against falling rocks, etc.

[Prior Art] Conventionally, a structure of this type in which diagonal beam members, support members, and snow blocking materials on the steel plate side were welded and integrated was proposed in Japanese Utility Model Application Publication No. 47-30903, and a structure made of concrete was also proposed. Japanese Patent Publication No. 57-34406 proposes a structure in which the pillars, horizontal pillars, and retaining pillars are integrated.
However, in both cases, the foundation concrete was cast on site, and steel plate or concrete pillars, snow blocking materials, etc. were constructed on top of this foundation concrete, so concrete pouring machines had to be transported to mountainous areas. However, there were problems in that the construction was troublesome and the construction period took a long time as it required waiting until the foundation concrete had hardened. Therefore, Japanese Utility Model Application Publication No. 53-62105 proposes a pillar for a rockfall protection fence that does not require a foundation, and can be constructed without using foundation concrete. A wedge-shaped insertion support member is provided on the lower surface of the bearing pressure plate, and a column is integrally erected on the upper surface of the bearing pressure plate, the insertion support member is inserted into the slope to temporarily fix the column, and the column is connected to the upper end of the column. In this method, the posts of the protective fence are fixed by stretching multiple vertical support ropes, etc.

[Problems to be solved by the invention] In the above-mentioned protective fence, the loads of avalanches, falling rocks, etc. applied to the pillars act directly on the bearing plate and insertion support member that are welded and integrated with the pillars, so those loads are There is a surface that cannot effectively absorb the force of the slope, and if the support collapses due to that load, the bearing plate and insertion support member welded to the support will also come off the slope, causing the ground on the slope to fall. There was a problem that the effect of preventing slippage was quickly lost.

Therefore, this invention can shorten the construction period and reduce the ratio of mechanical construction, can effectively absorb the force of loads such as avalanches and falling rocks, and has the effect of continuously preventing landslides on slopes. The purpose is to provide a protective barrier against avalanches and falling rocks.

[Means for solving the problem] The present invention consists of a precast concrete substrate fixed to a slope by an anchor, and a precast concrete substrate that is erected on this substrate and has a protective surface facing the mountain side that receives the load. It includes a main body made of concrete, and a buffer connecting portion that connects the base plate and the main body, and the buffer connecting portion is provided so as to be able to be broken by a load that is smaller than the fixing force of the anchor and exceeds a predetermined value.

[Operation] With the above configuration, a protective wall is constructed on a slope using a precast concrete substrate and main body manufactured in a factory. And the loads of avalanches, falling rocks, etc.
If the anchoring force is smaller than the fixing force of the anchor, but greater than a predetermined value, the buffering connection will break and the force of the load can be buffered, and even after the buffering connection is broken, the board will remain fixed by the anchor. Since it remains on the slope in the same condition, the base plate and the anchor can continue to prevent the slope from sliding.

[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 and 2 show a first embodiment of the present invention, in which 1 indicates an anchor 3 attached to a mountain slope 2.
A main body 4 having a triangular side surface and having a front part 4A and a retaining part 4B is fixed to the board 1 by an anchor bolt fixed to the board 1.
It is fastened by nut 5, and this unga bolt
The fastening portion 5A, which is a buffer connecting portion between the substrate 1 and the main body 4 by the nut 5, is configured to break when the protection surface A receives a small but predetermined load or more due to the fixing force of the substrate 1 by the anchor 3. There is. 6
is a beam arranged in plural stages on the main body 4, and the front surface of the beam 6 and the front surface of the main body 1 constitute a protective surface A facing the mountain side. Reference numeral 7 indicates a sliding surface, and the anchor 3 penetrates through the sliding surface 7 and reaches the bedrock. 8 is an anchor head. In this case, the main body 4, the beam 6, and the substrate 1 may be made of prestressed concrete or reinforced concrete and connected to each other with bolts and nuts, or may be fastened with bolts and nuts. Also, anchor 3 can be used with 1 or 2 earth anchors, lock anchors, etc.
Using the above method, the substrate 1 may be pressed against the slope using a prestressed steel material.

The substrate 1, the main body 4, and the beam 6 are manufactured in a factory, and the substrate 1 and the main body 4 are assembled in the factory or on a flat ground or slope at the site, and then the anchor 3 fixed deep underground on the slope 2 is attached to the base plate 1 and the main body 4. The substrate 1 is fixed and the beam 6 is attached to the main body 4. Alternatively, the board 1, main body 4, and beam 6 manufactured in a factory may be assembled in the factory or on a flat ground at the site, and then the assembled board 1 is fixed to the anchor 3, and each adjacent beam 6 is attached to concrete or Connect to steel materials, etc.

If an avalanche, falling rock, or collapsed earth occurs after construction is completed in this way, if the load is within the allowable range of the protective wall, it will be absorbed by the protective wall, and if it is greater than the specified value, that is, greater than the allowable range, the anchor bolt・
The fastening portion between the base plate 1 and the main body 4 by the nut 5 is destroyed, and the force of an avalanche, falling rock, etc. can be buffered. In this case, since the substrate 1 remains fixed by the anchors 3, the ground surface 7 caused by the anchors 3
The anti-slip function can be maintained.

In the embodiment described above, the substrate 1, main body 4, and beam 6 are all manufactured in a factory, so that an inexpensive and high-quality protective wall can be obtained. In addition, since the anchors 3 for stabilizing the slope serve as the foundation for the protective wall and anchor the substrate 1, the conventional on-site pouring of foundation concrete can be omitted, shortening the construction period and reducing the proportion of mechanical construction. can be reduced. Furthermore, it is rational to simultaneously realize measures to protect against avalanches, falling rocks, or collapsed soil on slopes and stabilizing the sloped ground, and if the load of avalanches, falling rocks, etc. Since the structure is designed to cause damage, the damage can buffer the force of the load.
Furthermore, even after breakage, the anchor 3 and the base plate 1 that reach the lower part of the sliding surface 7 can continue to maintain the ground stabilization and landslide prevention functions.

FIG. 3 shows a second embodiment of the present invention, in which the same parts as in the above embodiment are denoted by the same reference numerals, and the explanation of the same parts is omitted. The center of the upper surface of the substrate 1 is fixed to the slope 2 by the anchor 3. A protrusion 9 is integrally formed in the protrusion 9, and a vertical groove 10 and an oblique groove 11 are formed in the protrusion 9, and a front pillar 12A is inserted into the groove 10. 11
The retaining pillar 12B is inserted into the front pillar 12A and the retaining pillar 1.
2B are integrated with each other by bolts and nuts (not shown) or by welding to form the main body 12. Also,
The lower ends of the front pillar 12A and the retaining pillar 12B are fixed to the protrusion 9 by horizontal tightening bolts and nuts 13.
Also, a beam 6 is provided on the front pillar 12A of the main body 12 in the same manner as in the above embodiment.

The construction is carried out in the same order as in the above embodiment, and when a load exceeding the allowable range is applied, the lower part 12C of the main body 12, which is a buffer connection part, is destroyed to buffer the force of the load, and the superstructure is removed. Even if the base plate 1 is tilted, the anchor 3 holds the base plate 1 fixed, and the function of stabilizing the slope and preventing sliding can be maintained.

In the first and second embodiments described above, the beam 6 may be formed to have a lower strength than the lower part of the main body 12 so that the beam 6 breaks when a load exceeding an allowable range is applied.

FIG. 4 shows a third embodiment, and the same reference numerals are given to the same parts as in the above embodiment, and explanations of the same parts are omitted. For example, a plurality of main bodies 4 having triangular side surfaces are arranged side by side, and the front surface of the main bodies 4 constitutes a protective surface A facing the mountain side. The construction is carried out in the same order as in the above embodiment, and the fastening part 5A, which is the buffer connection part between the board 1 and the main body 4 by the anchor bolt/nut 5, is destroyed if a load exceeding the allowable range is applied. It is configured.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the structure and shape of the substrate, main body, anchor, etc. may be selected as appropriate.

[Effects of the invention] The present invention consists of a precast concrete substrate fixed to a slope by an anchor, a precast concrete main body having a protective surface erected on the substrate facing the mountain side and receiving a load, and The protective wall is provided with a buffer connecting portion that connects the substrate and the main body, and the buffer connecting portion is provided so that it can be broken by a load that is smaller than the fixing force of the anchor and exceeds a predetermined value, and the protective wall is inexpensive and of high quality. In addition, because the anchors for stabilizing the slope serve as the foundation for the protective wall and anchor the substrate, the conventional on-site pouring of foundation concrete can be omitted, the construction period can be shortened, and the proportion of mechanical construction can be reduced. can be reduced. In addition, by sharing anchors, substrates, and main foundations, protection works can be installed rationally and economically, and the momentum of loads such as avalanches and falling rocks can be effectively absorbed.
It is possible to provide a protective wall against avalanches and falling rocks that continuously has the effect of preventing landslides on slopes.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, FIG. 1 is a sectional view, FIG. 2 is a plan view, FIG. 3 is a perspective view of the second embodiment, and FIG. 4 is a perspective view of the second embodiment. FIG. 3 is a perspective view showing a third embodiment. DESCRIPTION OF SYMBOLS 1... Board, 3... Anchor, 4, 12... Main body, 5A... Fastening part (buffer connection part), 12C...
...lower part (buffer connection), A...protective surface.

Claims (1)

[Scope of utility model registration request] A precast concrete substrate fixed to the slope by an anchor, a precast concrete main body with a load-receiving protective surface erected on the substrate facing the mountain side, and a buffer for connecting the base and the main body. 1. An avalanche/rockfall protection wall, comprising: a connecting portion, the buffer connecting portion being small due to the anchoring force of the anchor and capable of being broken by a load exceeding a predetermined value.