JP2645484B2 - Cushion material for rock fall prevention fence - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial application >> The present invention relates to a rockfall prevention fence that blocks falling rocks, rocks, etc. below a rockfall source such as a mountainous area, The present invention relates to cushioning materials for rockfall prevention fences for preventing falling rocks and preventing landslides.

<< Conventional technology >> Conventional rockfall prevention fences are constructed by extending a main post made of H-section steel approximately perpendicularly to the slope at intervals of several meters on the foundation concrete cast at the rockfall prevention point, and extending the main post. Place another or the same basic concrete on the valley side of the base, and connect and fix the part of the extended main post opposite to the solid end of the basic concrete with the support made of H-section steel. Then, the support and the base of the main post are connected and fixed to each other with a bottom connection. Further, on the main post fixed to the foundation concrete, an old tire is supported on a wall material and used as a cushion material to form a rock fall prevention fence. The cushion material made of old tires is used to prevent the fence body from being damaged by the impact of falling rocks. Although it is located in a place where transportation is inconvenient, such as parts, the workability is good, and it is light and easy to work. The used tires are stacked in two layers or two to five layers in close proximity to each other.

A sand cushion method of supporting earth and sand or sandbags on a wall material may be used instead of old tires.
This sand cushion method has an advantage that the load distribution effect at the time of a dynamic load such as at the time of falling of a rock is excellent because the falling rock or the like is embedded in the earth and sand or the sandbag. However, in the sand cushion method, the load is large, the stress is also large, and a physical attack such as rain leads to a change in shape and a decrease in the effect. Furthermore, since it is heavy, there is a problem that it is difficult to transport it to an installation place such as a mountain area.

《Problems to be Solved by the Invention》 However, the conventional rock fall fence using old tires has a structure that is hollow and has no tube inside, and old tires are merely stacked in the same direction. . Therefore, even if two or more layers are piled up, it is not possible to sufficiently disperse the stress in the horizontal direction of the falling rock that has fallen from above, and when a large load such as a falling rock is applied, it deforms flat and the amount of absorption of impact energy decreases Problem. In addition, when installing rock fall prevention fences over a wide area, the amount of used tires required is enormous, and it is difficult to obtain a large amount of used tires.

<< Means for Solving the Problems >> Therefore, the present invention provides a rock fall prevention fence comprising: a shock absorber made of a foamable resin; and an outer frame body having a shape for dispersing impact and covering the shock absorber. The object described above is to provide a cushioning material for a rockfall prevention fence characterized by comprising a cushioning material for foaming, or a cushioning body made of a foamable resin, and an outer frame body having an uneven shape and covering the cushioning body. Solve.

<Operation> When a rock falls, the outer frame disperses the impact load laterally from the area where the impact was caused by the rock, and the dispersed impact load is applied not only to the area where the rock has fallen but also to the internal shock absorber. Each part absorbs the impact, and the impact load reduced by the shock absorber is absorbed by the main post, the support, the foundation concrete, and the ground.

<< Embodiment >> An embodiment of the present invention will be described below with reference to FIGS. 1 to 42.

A first embodiment will be described. FIG. 1 is a perspective view of a first embodiment of the present invention, FIG. 2 is an exploded view, FIG. 3 is a front view, FIG. 4 is a left side view, and FIG. FIG. 6 is a plan view, FIG. 6 is a rear view, and FIG.
FIG. 8 is an explanatory view showing a fixture, FIG. 9 is a side view showing an attached state, and FIG.
The figure is a perspective explanatory view showing an attached state.

(1) is a cushion material for rock fall prevention fence. As shown in FIG. 2 showing the disassembled state, the cushioning material (1) for rock fall prevention fence comprises a buffer (2), an outer frame (3), and a lid (4). The buffer (2) is made of a plate-shaped body of a foamed material such as foamed polystyrene, foamed polyurethane, foamed concrete, and foamed rubber. The outer frame (3) comprises an upper plate (5) and a lower plate (6), each of which is made of glass fiber reinforced plastic (FPP) or a synthetic resin having the same physical and chemical properties. (5) By combining the lower plate (6) up and down, the plate-shaped buffer (2) can be sandwiched between the lower plate (6) and the lower plate (6). The upper plate (5) is formed in one direction with wavy irregularities to obtain strength against an impact due to an external force, and bends an end portion in a wavy direction to form an upper plate bent portion (8). The lower plate (6) is a plate-like body and forms a lower plate bent portion (9) by bending a pair of opposite ends similarly to the upper plate (5). At this time, the pair of opposed ends are opened when the upper plate (5) and the lower plate (6) of the bending portion are combined. The lid body (4) is made of a foamed material such as foamed polystyrene, foamed polyurethane, foamed concrete, foamed rubber and the like, similar to the cushioning body (2). Opposite end opening of (10)
It is formed so that it can be inserted into. Therefore, the buffer (2) is inserted between the upper plate (5) and the lower plate (6), and the buffer (2) and the lower plate (6) are bonded and fixed with an adhesive.
Similarly, the buffer body contact portion (7) of the upper plate (5) and the buffer body (2)
Are bonded and fixed, and the corresponding upper and lower platen bent portions (8) and (9) are bonded and fixed to each other. Next, the lid (4) is inserted into a pair of opposed end openings (10) formed by the upper plate (5) and the lower plate (6), and the upper plate (5) and the lower plate (6) are connected to each other. With an adhesive. Further, a pair of opposing end openings (10) of the cushion material (1) for rock fall prevention fences.
A through hole (11) for fixing is formed in the vicinity of the upper plate (5) convex portion so as to penetrate from the upper plate (5) to the lower plate (6). In this embodiment, the through-hole (11) is formed in the projection of the upper plate (5).
In particular, the location of the perforation is not specified, and it suffices that the perforated portion is in the vicinity of the facing end opening (10). (12) is cushion material for rock fall prevention fence (1)
Fixture. The fixture (12) is composed of a bolt (13), a bolt (14) and a plate (15) as shown in FIG. The bolt (13) has a U-shape, and a male screw is screwed into the end (16). The nut (14) is provided with a female screw that can be screwed into the male screw of the bolt (13). The plate (15) is a plate having a hole (17) into which the U-shaped end (16) of the bolt (13) can be inserted. The U-shaped end of the bolt (13) (1
The spacing of 6) is the cushion material for the adjacent rock fall prevention fence (1)
When the cushioning material for rockfall prevention fence (1) is connected so that the opening (10) of the opposite end abuts, the through-hole (11) penetrated in the vicinity of the opening (10) of the adjacent opposing end is bolted to each other. This is the interval at which the U-shaped end (16) of (13) can be inserted. The rock material (1) for rock fall prevention fence formed in this way is
As shown in Fig. 10, fixed and used as follows. That is, (18) is basic concrete. The foundation concrete (18) is a foundation for fixing a rockfall prevention fence, and is cast at a desired rockfall prevention point. In this embodiment, an example will be described in which the light source is provided on a slope of a mountain. For the foundation concrete (18), the mountain-side foundation concrete (19) and the valley-side foundation concrete (20) are cast at appropriate intervals to support the rockfall prevention fence. A main post (21) made of H-shaped steel is extended and fixed to the mountain-side foundation concrete (19) in a direction substantially perpendicular to the inclined surface at intervals of several meters. Therefore, at this time, the other main post (21) is located at a position at least the same distance from the main post (21) in the longitudinal direction of the cushioning material (1) for rockfall prevention fences. Take the configuration as installed. In this embodiment, the fixing device is extended and fixed in a substantially vertical direction. However, it is not particularly necessary to extend the fixing device in a vertical direction, and it is preferable that the fixing device be extended and fixed at an angle that can more effectively prevent falling rocks from above according to a desired location. . The main post (21) is extended and fixed at intervals of several meters, but may be located at an appropriate position in consideration of strength and the like. Valley side foundation concrete (2
0), one end is fixed at a position corresponding to the main post (21) extended and fixed to the mountain side foundation concrete (19) in the direction of the inclined surface, and the end of the corresponding main post (21) is fixed near the other end. A support (22) made of H-section steel is provided to support the main post (22). At both ends of the main post (21) and the support (22), which are fixed to the foundation concrete (18), both ends of the bottom joint (23) made of H-shaped steel as a reinforcing material are also fixed. Further, the adjacent supports (22) may be reinforced by fixing the brace. (24) is a wall material. The wall material (24) is made of H-shaped steel, and is provided in a plurality of rows so as to extend over the main posts (21) extending and fixed at intervals of several meters, and fixed to the main posts (21) to prevent rockfall fences. The mounting cushion material (1) can be installed and fixed.
Therefore, the lower plate (6) of the cushion material (1) for rock fall prevention fence configured as described above is provided so as to contact the wall material (24). At this time, the opposing end opening (10) of the cushioning material (1) for rock fall prevention fence is installed so as to be above the main post (21), and another rock fall prevention is made so that the opposing end openings (10) come into contact with each other. The fence cushion material (1) will also be installed on the wall material (24). Next, the U-shaped end (16) of the bolt (13) is inserted through the corresponding through hole (11) of the cushion material for the rockfall prevention fence (1), and then the U-shaped end of the bolt (13). Holes (17) drilled in the plate (15) from the side of the main post (21) opposite to the cushioning material (1) for rockfall prevention fences in the part (16)
Then, the nut (14) is screwed into the bolt (13) and fixed. By installing and fixing in this way, the cushioning material for rock fall prevention fence (1) can be used as wall material (24) and main post (2).
Fix it to 1) and also fix the adjacent cushioning materials for rockfall prevention fences (1). In addition, the upper plate (5) is made to have an uneven shape, so that it can withstand an external impact.
In addition to gaining strength, the impact load is dispersed in the horizontal direction, and the impact load is transmitted to the parts that have not been directly impacted by falling rocks. It is possible.

Next, a second embodiment of the present invention will be described. FIG. 11 is a perspective view of the second embodiment, FIG. 12 is a side view showing the same mounting state, FIG. 13 is a front view thereof, FIG. 14 is a left side view thereof, FIG.
15 is the same right side view, FIG. 16 is the same plan view, FIG. 17 is the same rear view, FIG. 18 is a sectional view taken along the line BB of FIG. 13, and FIG. 19 is an explanatory view showing the same disassembled state. FIG. 20 is an explanatory perspective view showing the attached state.

(31) is a cushion material for rock fall prevention fence. As shown in FIG. 9 showing the disassembled state, the cushion material (31) for the rockfall prevention fence includes a buffer (32), an outer frame (33), and a lid (34).
Consists of The buffer (32) is made of a plate-shaped body of a foamed material such as foamed polystyrene, foamed polyurethane, foamed concrete, and foamed rubber. The outer frame (33) is composed of an upper plate (35) and a lower plate (36), each of which is made of glass fiber reinforced plastic (FRP) or equivalent synthetic resin, and is tough against external impact. The outer shape is formed in the shape of a corrugated plate, which is a semi-hexagonal shape in one direction, and the upper plate (35) and the lower plate (36) are combined up and down to form a plate-shaped buffer (32) between them. Can be included. The lower plate (36) has a locking portion (37) fixed to the outside of one end in the wave direction. The lid (34) has a plate shape, and as shown in FIG. 9, the upper plate (3) of the outer frame (33).
It is a shape that can seal the gap formed when 5) and the lower plate (36) are combined, and has a hexagonal continuous shape. The lid (34) is made of foamed material such as foamed polystyrene, foamed polyurethane, foamed concrete, foamed rubber and the like, similar to the buffer (32), and is formed when the upper plate (35) and the lower plate (36) are combined. It is formed so that it can be inserted into a pair of opposed end openings (40).

Next, a method of fixing the cushion material (31) for the rock fall prevention fence will be described. Foundation concrete (18), main post (2
1), support (22) and brace (23), wall material (24)
Has the same configuration as the first embodiment. Therefore, the part of the lower plate (36) of the cushion material (31) for rockfall prevention fences configured in this way, which protrudes outward in a wavy shape, is installed so as to contact the wall material (24) made of H-section steel. I do. At this time, as shown in FIG. 12, the cushion material (31) for the rockfall prevention fence
Place it so that the locking part (37) fixed to 6) is locked to the end of the wall material (24). As described above, the rock fall prevention fence is formed by laying a plurality of cushion materials (31) for the rock fall prevention fence on the wall material (24). In this embodiment, the locking portion (37) is fixed to the end of the lower plate (36), and the wall portion (2) is fixed by the locking portion (37).
4), but through holes are provided in the upper plate (35) to the lower plate (36) as in the first embodiment, and a plurality of cushion materials (31) for rock fall prevention fences are connected and fixed by a fixing tool. It is also possible to configure. In addition, the upper plate (35) has an uneven shape to obtain strength against impacts due to external force, disperse the impact load in the lateral direction, and directly apply to parts that are not impacted by falling rocks etc. Also transmit the impact load, and therefore, it is possible to absorb the impact load over a large area of the buffer body (32) included therein.

Next, FIG. 3 is a perspective view of the third embodiment.
FIG. 21 is an explanatory side view showing the attached state, FIG. 22 is a front view, FIG. 23 is a front view, FIG. 24 is a left side view, FIG. 25 is a right side view, and FIG. 26, FIG. 27 which is the rear view, FIG. 28 which is a sectional view taken along the line CC of FIG. 23, and FIG. 29 which is an explanatory view showing an exploded state. Third
In the embodiment, the lower plate (36) of the second embodiment is formed in a plate-like body, so that the cushion material (31) for rock fall prevention fence is made of a wall material (2).
4) If it is configured to be at least at the position having the horizontal length of the cushioning material for rock fall prevention fence (31),
In this embodiment, the position of the wall member (24) during that time may be any position. In this embodiment, the locking portion (37) is fixed to the end of the lower plate (36) and fixed to the wall material (24) by the locking portion (37). It is also possible to provide a through hole in (35) to lower plate (36), and connect and fix a plurality of rockfall prevention fence cushion materials (31) with a fixing tool.

The fourth embodiment is as shown in FIGS. 30 to 36.
That is, FIG. 30 is a perspective view showing the fourth embodiment, FIG. 31 is a side view showing the same mounting state, FIG. 32 is an explanatory view showing the same disassembly state, and FIG. FIG. 34 is the same front view, FIG. 34 is the left side view, FIG. 35 is the same plan view, and FIG.
It is D sectional drawing. As shown in FIGS. 30 to 36, the shape of the outer frame (33) has a shape as if two hexagons are connected, and the edge of the uneven surface of the upper plate (35) and the lower plate (36). The portion is different from the second embodiment in width. In the fourth embodiment,
Although the lower plate (36) has an uneven shape, the lower plate (36) is formed in a plate shape as in the third embodiment, so that a wall material is provided on the lateral end of the cushioning material (31) for rock fall prevention fences. If it is configured to have a lateral length where (24) is located, it is also possible to configure so that any position of the wall material (24) therebetween can be used.

Also in the third and fourth embodiments, the upper plate (35) is
By making the shape uneven, it obtains strength against impact by external force and disperses the impact load in the horizontal direction,
The impact load is also transmitted to a portion that has not been directly impacted by a falling rock or the like, and therefore, it is possible to absorb the impact load over a wide range of the buffer body (32) included therein.

Further, the lateral length of the first to fourth embodiments can be changed according to the condition of the wall member (24) at the work site.

The fifth embodiment is a perspective view showing the fifth embodiment.
As shown in FIG. 38, which is a sectional view taken along the line EE in FIG. 37,
This is an example in which the side surface shape of the rockfall prevention fence cushion material (1) is formed in a shape in which a plurality of rhombuses are connected. In this embodiment, since the upper plate (35) and the lower plate (36) are not provided with the upper plate bent portion (8) and the lower plate bent portion (9) unlike the first embodiment, It is possible to process the cushion material (31) for rock fall prevention fence.

The sixth embodiment is a perspective view showing the sixth embodiment.
FIG. 39 is an example in which quadrangles are formed in a continuous shape as shown in FIG. 40 which is an end view taken along line FF. Of course the fifth
In the embodiment and the sixth embodiment, as in the other embodiments, by forming the lower plate (36) in a plate shape, the wall material (24) is at least as long as the cushion member (31) for rock fall prevention fence in the horizontal direction. As long as the wall member (24) is located at a position having a distance, the wall member (24) can be arranged at any position. In this embodiment, as in the fifth embodiment, the upper plate (35) and the lower plate (36) are provided with the upper plate bending portion (8) and the lower plate bending portion (9) as in the first embodiment. Since it is not provided, it is possible to process the cushion material (31) such as a rock fall prevention fence at a work site. Also in the fifth and sixth embodiments, the lateral length can be changed according to the condition of the wall member (24) at the work site.

FIG. 41 shows the embodiment of FIG. 7. In the embodiment of FIG. 7, the shock absorber of the first embodiment is provided in the entire upper plate (5) and lower plate (6). (2) a and (2) b are separately molded and bonded to each other to constitute a buffer (2). In addition, the buffer members (2a) a and (2) b may be configured without being bonded. Furthermore, the buffer body (2) may be formed integrally with the shapes of the upper plate (5) and the lower plate (6). In the second to sixth embodiments as well, the cushioning material may be similarly configured, and the cushioning material for the rock fall prevention fence may be configured to be provided on the entire inside of the upper plate (35) and the lower plate (36). .

FIG. 8 is a perspective view showing the embodiment of FIG.
As shown in FIG. 43 which is a sectional view taken along the line GG of FIG. 42 and FIG. 42, the shape of the upper plate (35) is formed in both vertical and horizontal directions so as to increase the strength against impact due to external force. It is an example configured to increase. In the eighth embodiment, a buffer (32) is filled in the entire inside of the outer frame (33). The buffer (32) is filled with a foam material such as foamed polystyrene, foamed polyurethane, foamed concrete, foamed rubber, or the like.
3) It may be foamed inside, or the foamed material may be processed into the shape of the outer frame (33), and the outer frame (33) may be bonded and fixed in a sandwich shape.

Also in the fifth to eighth embodiments, the upper plate (35) is made to have an uneven shape, thereby dispersing an impact load, as in the first to fourth embodiments, to thereby include a buffer included therein. It is possible to absorb the impact load over a wide area of the body (32).

Further, in each of the above embodiments, the cushion member for the rock fall prevention fence may be fixed by a fixing wire or a locking portion, but may be fixed by a bind wire or a band.

<< Effect >> According to the present invention, it is possible to receive the impact of falling rocks in a sufficiently dispersed manner, and the impact load is dispersed and transmitted to the shock absorber in a portion that is not directly impacted. It becomes possible. In addition, since it is made of FRP or an equivalent synthetic resin, and the buffer is also made of a foamed material, it is lightweight, has improved workability, and can be easily transported to a work place.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention, FIG. 2 is an exploded view of the same, FIG. 3 is a front view of the same, and FIG.
FIG. 5 is a left side view, FIG. 5 is a plan view, and FIG.
FIG. 7 is a rear view, FIG. 7 is a sectional view taken along the line AA of FIG. 3, FIG. 8 is a view of the parts, FIG. 9 is a side view showing the same mounting state, and FIG. The figure is a perspective explanatory view showing an attached state. FIG. 11 is a perspective view of the second embodiment,
12 is a side view showing the same mounting state, FIG. 13 is a front view thereof, FIG. 14 is a left side view thereof, FIG. 15 is a right side view thereof, and FIG.
FIG. 17 is a plan view, FIG. 17 is a rear view, and FIG.
FIG. 19 is a sectional view taken along the line B, and FIG.
FIG. 20 is a perspective explanatory view showing the attached state. FIG. 21 is a perspective view of the third embodiment, FIG. 22 is a side view showing the same mounting state, FIG. 23 is a front view thereof, FIG. 24 is a left side view thereof, and FIG. Right side view, FIG. 26 is the same plan view, FIG.
FIG. 27 is a rear view of the same, FIG. 28 is a sectional view taken along line CC of FIG. 23, and FIG. 29 is an explanatory view showing an exploded state. FIG. 30 is a perspective view showing the fourth embodiment, FIG. 31 is an explanatory side view showing the attached state, FIG. 32 is an explanatory view showing the disassembled state, and FIG. FIG. 34 and FIG.
FIG. 35 is a plan view of the same, and FIG. 36 is a sectional view taken along line DD of FIG. FIG. 37 is a perspective view showing a fifth embodiment, and FIG. 38 is a sectional view taken along line EE in FIG. FIG. 39 is a perspective view showing a sixth embodiment, and FIG. 40 is a sectional view taken along line FF of FIG. 39. FIG. 41 is an exploded perspective view showing a seventh embodiment.
FIG. 42 is a perspective view showing an eighth embodiment, and FIG.
FIG. GG is a sectional view taken along line GG. (1) Cushion material for rock fall prevention fence (2) Cushion, (3) Outer frame

Claims (2)

(57) [Claims] 1. A cushioning material for a rockfall prevention fence, comprising: a cushion made of a foamable resin; and an outer frame body having a shape for dispersing impact and covering the cushion. 2. A cushioning material for a rockfall prevention fence, comprising: a cushion made of a foamable resin; and an outer frame body having an uneven shape and covering the cushion.