JP3390132B2 - Protective fence for falling rocks - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a protective fence for preventing rockfall, earth and sand, driftwood, avalanche, snow pressure and the like.

[0002]

[Background Art] Since a protective fence for falling rocks is a fence for receiving rocks, sediments, etc. falling from a slope of a mountain, a cliff, etc., falling rocks, sediments, etc. collect on the back side of the fences. If too much rock, earth and sand, etc. accumulates and makes you feel sick, falling rocks may jump over the protective fence and fall. When rocks, earth and sand, etc. have accumulated on the back side of the protective fence to some extent, it is necessary to remove them. However, it is difficult to remove rocks, soil, etc. if the protective fence is installed in a long area.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a structure in which rock fall, earth and sand, etc. accumulated on the back side of a protective fence such as rock fall can be easily removed.

According to the present invention, end columns are erected at positions at both ends of a range where rock fall, earth and sand, etc. should be prevented, and a plurality of upper and lower columns are provided between these column columns over two rows on the front side and the rear side. A cable (wire rope) is erected, and a plurality of spacing members extending in the vertical direction are provided on the front side cable and the rear side cable with a plurality of spacing holding members extending in the horizontal direction and corresponding to the front and back. In the protection fence such as rockfall, which is made by connecting the front and rear spacing members to each other with a plurality of connecting members, at least two outlet support columns are erected between the end support columns at both ends. The front side and the rear side of the cable are detachable between the columns for the outlet.

According to the present invention, at least two columns for the outlet are established at appropriate positions of the protective fence for rockfalls, and the cables (wire ropes) on the front and rear sides are removed between the columns for the outlets. Since it is free, the cables between the outlet support columns can be removed to use the outlet support columns as outlets. If rock fall, sediment, etc. collects on the back side of the protective fence, the discharge opening can be created as described above to remove the fall rock, sediment, etc. from here.

When the distance between the left and right terminal columns is long,
One or a plurality of intermediate columns are erected between them. Secure the cables to the front and back of this intermediate column, respectively. When the distance between the left and right terminal columns is short, the terminal columns may be used as the outlet column.

Further, if necessary, at least one of the plurality of cables on the front surface side and the plurality of cables on the rear surface side is provided with a mesh. This net is also removable between the outlet posts.

The protective fence for rockfalls according to the present invention has a double structure in which a plurality of cables are installed on the front and rear sides, respectively. Moreover, a plurality of spacing members are attached to the plurality of cables, and the spacing members corresponding to the front and rear are connected by the connecting member. So before,
Since the later cables, the spacing members attached to these cables, and the coupling members for coupling the spacing members constitute a so-called elastic body having a large width, the absorbed energy becomes very large. Also, since it uses a cable, it is lightweight and has excellent workability.

[0009]

EXAMPLE FIG. 1 shows the entire protective fence 1 for falling rocks and the like. As an example, the protective fence 1 for preventing falling rocks, earth and sand, driftwood, avalanche, snow pressure, etc. is a slope of a mountain and a road (private house, etc.).
It is installed between and. The road side of the protective fence is called the front side and the mountain side is called the rear side.

Between the slope of the mountain and the road, terminal columns 10 are erected at positions at both ends of a range where rockfall, earth and sand, driftwood, avalanche, snow pressure, etc. should be received and blocked. In addition, two outlet support columns 20 are erected at appropriate intervals on the rear side (back side) of the protective fence at a place where an outlet for removing fallen rocks, earth and sand, etc. should be provided. . Intermediate columns 11 are established between the terminal columns 10 and the outlet columns 20 at substantially equal intervals. The terminal column 10, the outlet column 20, and the intermediate column 11 are firmly fixed to the ground by a concrete foundation 12 (see FIG. 3).

Between the terminal support 10 and the outlet support 20,
A plurality of steel cables (or wire ropes) 41A and 41B are stretched up and down over two rows on the front side and the rear side. These cables 41A and 41B are also fixed to the front and rear surfaces of the intermediate column 11 by U bolts 34 (see FIG. 6 ). Between the middle columns 11, front and rear cables 41A and 41
B is connected to each other by spacing members 31A and 31B, which will be described later, and a connecting member 33 (these are collectively indicated by reference numeral 30 in FIG. 1). A net 51 is stretched over the cable 41B on the rear surface side.

Between the two outlet support columns 20, between these support columns 20 as well, over two rows on the front side and the rear side,
A plurality of cables 40A and 40B are stretched up and down.
The front and rear cables 40A and 40B are connected to each other by a member indicated by reference numeral 30. A net 50 is stretched over the cable 40B on the rear side.

The cables 40A and 40B stretched between the two outlet support columns 20 are removable as will be described later. The mesh 50 can also be removed. If rocks, earth and sand, etc. collect on the rear side of the protective fence 1, the cable 40
A, 40B and the net 50 are removed, and the space between the two columns 20 is used as the discharge port. Rockfall, earth and sand can be removed through this outlet.

The nets 50 and 51 do not necessarily have to be provided. The place where the discharge port should be provided is not limited to one place of the protective fence, and it may be provided at a plurality of places at appropriate intervals.

2 to 4 are enlarged views showing the vicinity of the two outlet support columns 20, and FIGS. 5 and 6 are enlarged views of a part of the outlet support columns.

The outlet support column 20 is made of concrete,
Includes two anchor bases 21. The anchor base 21 is erected on the concrete foundation 12 and is entirely embedded in the concrete.

Each anchor base 21 is assembled from angle steel. The anchor base 21 is composed of four columns 22 and a horizontal cross member 23 connecting the columns 22.
The cross member 22 and the cross member 23 are fixed by welding.

A jaw anchor bolt 24 is attached to the anchor base 21.
A and 24B are provided over the front and rear two rows at a predetermined interval in the vertical direction. Holes are drilled in the columns 22 of the anchor base 21, and the jaw anchor bolts 24A, 24B are inserted in these holes.
, And a nut 25 is fastened to the rear ends of the bolts 24A and 24B. A reinforcing plate is fixed to a portion of the column 22 where a hole is formed, if necessary.

Furthermore, a wire mesh stop rod 26 is fixed to the support 22 on the rear surface side of the anchor base 21.

The tip portions of the jaw anchor bolts 24A and 24B including the jaw portions and the wire mesh stop rod 26 are exposed to the outside from the concrete of the column 20.

Between the two outlet support columns 20, cables 40A and 40B are installed on the two rows of jaw anchor bolts 24A and 24B on the front side and the rear side which project from the outlet support columns 20, respectively. That is, the cable on the front side
Both ends of the 40A are connected to the jaw anchor bolts 24A on the front side through the turnbuckles 42A,
Strong initial tension is applied by 42A. Similarly, the cable 40B on the rear side has turnbuckles 42B at both ends.
It is connected to the jaw anchor bolt 24B on the rear surface side through a turn buckle 42B and a strong initial tension is applied.

Space retaining members (H-shaped steel), 31A, 31B extending in the vertical direction are attached to the cables 40A, 40B between the two columns 20 for the outlet. That is, the front surface side spacing member 31A is fixed to the cable 40A by the U bolt 34 at the front surface thereof, and the rear surface side spacing member 31B is fixed to the cable 40B by the rear surface of the U bolt 34. These spacing members 31A, 31
B always keeps the vertical distance between the cables 40A and 40B constant. Since the cables 40A and 40B extend horizontally and the spacing members 31A and 31B extend vertically, and these are provided at appropriate intervals, a strong grid-like surface for receiving rockfall, earth and sand, etc. is formed. ing. Interval holding material 31
A and 31B are not fixed to the concrete foundation 12 and are floating in the air.

The front-side spacing member 31A and the rear-side spacing member 31B correspond to the front and rear, respectively. Spacers 31A and 31B corresponding to these front and rear are connecting materials (H-shaped steel)
They are connected by 33 and are fixed to each other. Connecting material
A plurality of 33 are provided at intervals vertically.

Between the two outlet support columns 20, a wire mesh 50 is attached to the entire rear surface, if necessary. The wire mesh 50 is attached to the cable 40B and the wire mesh stop rod 26 using a coupling coil 52 (or wire band).

Even between the terminal support column 10 and the outlet support column 20, the cables 41A,
41B is erected, and the spacing members 31A and 31B are attached to the front and rear cables 41A and 41B, respectively.
And 31B are connected by a connecting member 33. An intermediate support (H steel) 11 is provided between the terminal support 10 and the outlet support 20, and the cable is fixed to the intermediate support 11 by U bolts 34 . Further, if necessary, the cable 41B on the rear surface side
Wire mesh 51 is stretched over.

A cable 40 is provided between the outlet support columns 20.
A and 40B are removed at turnbuckles 42A and 42B. The turnbuckle 42A and the cable 40A are connected by a bolt / nut 43 to the U-shaped end 42a of the turnbuckle 42A and the end ring 40a of the cable 40A. When the bolt / nut 43 is removed, the cable 40A is separated from the turnbuckle 42A. Also between the turnbuckle 42B and the cable 40B, the bolt / nut 43 that connects the U-shaped end 42b of the turnbuckle 42B and the end ring 40b of the cable 40B may be removed. However, the cables 40A, 40B can be similarly removed by removing the bolts / nuts connecting the jaw anchor bolts 24A, 24B and the turnbuckles 42A, 42B. The spacing members 31A and 31B and the connecting member 33 are also separated from the cables 40A and 40B by removing the U bolt 34.

The wire mesh 50 can be easily removed from the wire mesh stop rod 26 and the cable 40B by removing the coupling coil 52.

A front and rear spacing member is provided both between the outlet support columns 20 and between the terminal support column 10 and the outlet support columns 20.
31A and 31B are connected by the connecting member 33, and the front and rear spacing members 31A and 31B are respectively the front and rear cables 40A,
By being attached to the 40B, 41A, 41B, the front and rear cables 40A, 40B, 41A, 41B, the front and rear spacing members 31A, 31B and the connecting member 33 are a kind of elastic body having a large width in the front and rear direction ( Since the cable has elasticity in the front-back direction, it is possible to absorb a large amount of energy. Further, since the cable is used, the weight of the material forming the protective fence 1 is relatively light and the workability is good.

7 to 9 show another embodiment.
The structure of the column for the outlet is different from that of the above-described embodiment. The outlet support column 20A is composed of four Hs erected on the concrete foundation 12.
It is composed of steel 27 and a cross member 28 connecting them. One ends of the turnbuckles 42A and 42B are directly connected to the four H steels 27. A wire mesh 50 is also stretched on the rear surface of the outlet support column 20A. The wire net 50 is a holding plate from above
Support for outlet by fixing 29 to H steel 27 with bolts
It is held down to 20A. The other structure is the same as that of the previous embodiment.

[Brief description of drawings]

FIG. 1 is a plan view showing an entire protective fence such as a falling rock.

FIG. 2 is an enlarged plan view showing the vicinity of a support for an outlet according to an embodiment.

FIG. 3 is a rear view showing the vicinity of a support for an outlet in an enlarged manner.

FIG. 4 is an enlarged sectional view showing a support column for a discharge port.

FIG. 5 is a plan view showing a part of the support for the discharge port in a further enlarged manner.

FIG. 6 is a rear view showing a part of a support for an outlet in a further enlarged manner.

FIG. 7 is a plan view showing, in an enlarged manner, the vicinity of a support for an outlet according to another embodiment.

FIG. 8 is a rear view showing the vicinity of a support for an outlet in an enlarged manner.

FIG. 9 is an enlarged side view showing a support column for an outlet.

[Explanation of symbols]

Protective fences such as 1 rockfall 10 terminal support 11 Middle support 20 Support for outlet 31A, 31B spacing material 33 Connecting material 40A, 40B, 41A, 41B cable 50,51 wire mesh

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E01F 7/04

Claims (3)

(57) [Claims] 1. Terminal struts are erected at positions at both ends of a range where rockfall, earth and sand, etc. should be prevented, and a plurality of cables are vertically arranged between these terminal struts over two rows on the front side and the rear side. It is erected and attached to each of the multiple cables on the front side and multiple cables on the rear side with multiple spacing members that extend in the vertical direction at intervals in the left-right direction and correspondingly to the front and back to support the front and back. in fences rock fall or the like formed by interconnecting spacing holding member by a plurality of connecting members to a position between said terminal posts at both ends, co comprising an anchor block
At least two columns of outlets made of Ncrete were erected, and the anchor base was divided into two rows, the front side and the rear side.
Multiple jaw anchor bolts at intervals in the vertical direction.
The front side and rear side cables are
Provided on the anchor base between the columns for the outlet
The above-mentioned projecting from the above-mentioned concrete pillar for the outlet
A protective fence for falling rocks, etc., characterized by being removable from the jaw anchor bolt . 2. A safety barriers of falling rocks etc. The intermediate post is erected, before, according to claim 1, the rear side of the cable is fixed to the intermediate pillar between the terminal post and the discharge port for posts. 3. A net is stretched over at least one of the plurality of cables on the front surface side and the plurality of cables on the rear surface side, and the net can be detached between the columns for the discharge port. Protective fence for falling rocks, etc.