JP6689697B2 - Rockfall protection device - Google Patents

Description

  The present invention relates to a rockfall protection device.

  There is known a rock fall prevention device that is installed on the side of a road or on a hillside ground to prevent rock fall on the road. Generally, there are pocket-type rockfall protection nets that have openings at the top to capture and guide rockfalls, and cover-type rockfall protection nets that cover the source of rockfalls in advance (for example, Patent Document 1).

JP, 2014-202056, A

For example, in a pocket-type rockfall protection net, the induced rockfall is deposited below the rockfall protection net (the slope of the ground).
As shown in FIG. 5, if the rockfall R that has fallen from the ground G beside the road continues to accumulate, the rockfall protection net N may be pushed toward the road S side by the rockfall R and overhang. The rockfall protection net (capturing portion) N that overhangs with the rockfall R obstructs the passage of vehicles, pedestrians, and the like passing through the road S. It is possible to prevent a large overhang of the rockfall protection net N by appropriately removing the accumulated rockfall R, but if a large amount of rockfall R occurs at one time, prevent a large overhang of the rockfall protection net N on the road S. I can't.

  Then, this invention is made | formed in view of the said subject, and an object of this invention is to provide the rockfall protection apparatus which controls that a capture part overhangs to the road side by the accumulation of rockfall.

  In order to solve the above problems, the rockfall protection device according to the present invention has a trapping section for trapping rockfall, a support section attached to the trapping section for supporting the trapping section by stretching it on the ground, and one end. Is fixed to the ground and the other end is fixed to the catching section or the supporting section, and a restricting section that restricts the overhang of the catching section from the ground is provided.

  In addition, the regulating portion has a fixing member whose one end is fixed to the ground, a connecting portion whose one end is attached to the supporting portion and which is connected to the fixing member at the other end side, the fixing member and the connection. A holding member that connects and holds the members at the other end sides thereof, and at least one of the fixing member and the connecting member is preferably movable with respect to the holding member.

  Further, it is preferable that a stopper that comes into contact with the holding member and restricts movement of the connecting member with respect to the holding member is provided at the other end of the connecting member.

  Further, it is preferable that at least one of the connecting member and the fixing member has a mark portion exposed from the holding member when the stopper contacts the holding member.

  Further, it is preferable that a stopper is provided on the other end of the fixing member to restrict the movement of the holding member with respect to the holding member.

  Further, the support portion includes a first support member and a second support member that extend so as to intersect with each other, and the connecting member includes the first support member and the second support member. Is preferably fixed to at least one of the above.

  In addition, it is preferable that the restriction portion includes a fixing member having one end fixed to the ground, and a holding member that holds the fixing member by connecting the fixing member to the support portion at the other end side of the fixing member.

  Further, it is preferable that the restriction portion is provided such that one end fixed to the ground is higher than the other end fixed to the capturing portion or the support portion.

  According to the present invention, it is possible to prevent the trapping portion from protruding toward the road side due to the accumulated rock fall.

It is a schematic perspective view of the rock fall protection apparatus which concerns on this invention. It is a schematic diagram showing a control part in the state where the amount of overhang of a catching part is not controlled. It is a schematic diagram showing a control part in the state where the amount of overhang of a catching part is controlled. It is a schematic diagram showing a control part concerning other embodiments. It is the schematic which shows the conventional rock fall protection net of the state overhanging to the road side.

  A preferred embodiment of the present invention will be described with reference to the drawings. It should be noted that the embodiment described below is merely an example, and various embodiments can be adopted within the scope of the present invention.

<Structure of rockfall protection device>
FIG. 1 is a perspective view showing a rock fall protection device 100 attached to the ground G. FIG. 2 is a diagram showing the restriction unit in a state where the overhang amount of the capture unit is not restricted. FIG. 3 is a diagram showing the restricting portion in a state in which the overhang amount of the capturing portion is restricted.
As shown in FIG. 1, the rockfall protection device 100 is installed on a ground G on a slope such as a roadside or a hillside ground, and guides rockfall that falls from the ground G to the bottom of the corner of the ground G, and The falling rock R is prevented from flowing out onto the road.
The rockfall protection device 100 includes a capturing unit 1 that captures the rockfall R, a support unit 2 that extends the capturing unit 1 on the ground G, and a restricting unit 3 that restricts the amount of the capturing unit 1 that projects to the road side. I have it.

[Capturing section]
The capturing unit 1 captures the rockfall R and guides the rockfall R to the slope of the ground G. As shown in FIG. 1, the capturing unit 1 is, for example, one formed by braiding a steel rope in a lattice shape (hereinafter, also referred to as a “mesh”). The net body 1 is formed in a substantially rectangular shape in a plan view, and is stretched so as to cover the ground G. Supports 2 are stretched vertically and horizontally around the net 1.
The uppermost portion of the net body 1 is supported by a support P fixed to the ground G, and a space (pocket) for introducing the rockfall R between the net body 1 and the ground G is formed.

[Supporting part]
The support portion 2 supports the net body 1 in order to stretch the net body 1 on the ground G.
As shown in FIG. 1, the support portion 2 has a plurality of first support members 21 and a plurality of second support members 22 that extend to intersect each other. The first support member 21 is formed of, for example, a steel rope and extends along the slope of the ground G (hereinafter, also referred to as “longitudinal rope”).
Of the plurality of vertical ropes 21, some upper ends of the vertical ropes 21 are fixed to the support columns P. Further, the lower end portion of the vertical rope 21 is fixed to the second support member 22 by a known fastener C1.

The second support member 22 is formed of, for example, a steel rope and extends across the slope of the ground G (hereinafter, also referred to as “lateral rope”). Both ends of the horizontal rope 22 are fixed to the ground G by anchor members A (only one end is shown).
The vertical rope 21 and the horizontal rope 22 are connected and fixed to each other at a crossing portion thereof by a known fastener C2.

[Regulatory Department]
The regulation unit 3 regulates the amount of protrusion of the net body 1 to the side opposite to the ground G, that is, the road S side due to the accumulation of the rockfall R.
As shown in FIGS. 1 and 2, the restriction portion 3 is provided between the ground G and the net body 1. The regulating portion 3 has one end fixed to the ground G and the other end fixed to each vertical rope 21 of the support portion 2. The regulation part 3 is preferably arranged below the rockfall protection device 100 (on the slope end of the ground G), and for example, a vertical rope extending between the first and second horizontal ropes 22 from the bottom. It is good to be fixed to 21. The restriction portion 3 is provided such that one end side fixed to the ground G is higher than the other end side fixed to the vertical rope 21.

  As shown in FIG. 2, the restricting portion 3 holds the fixing member 31 fixed to the ground G, the connecting member 32 connecting the net body 1 and the fixing member 31, and the fixing member 31 and the connecting member 32 movably. Holding member 33 for

  The fixing member 31 is attached to the ground G at one end side and is exposed to the ground G at the other end side, and is attached to the other end side of the anchor member 31a exposed from the ground G. , And a fixed rope 31b made of steel, for example. A stopper 31c is provided on the end side of the fixed rope 31b that is not fixed to the anchor member 31a so as to abut the holding member 33 and prevent the fixed rope 31b from coming off the holding member 33. The stopper 31c is formed of, for example, a metal lump (ingot).

  The connecting member 32 is a member that connects the vertical rope 21 of the support portion 2 and the fixing member 31 and is formed of, for example, a wire rope made of steel (hereinafter, also referred to as “connecting rope”). One end of the connecting rope 32 is attached to the vertical rope 21 of the support portion 2, and the other end thereof is connected to the fixed rope 31b via the holding member 33. The connecting rope 32 is formed with an annular portion 32a on the fixed side (one end side) with the vertical rope 21. In the annular portion 32a, the connecting rope 32 is fixed to the vertical rope 21 via a fastener C3, for example.

On the other end side of the connecting rope 32, a stopper 32b is provided which contacts the holding member 33 and prevents the connecting rope 32 from coming off the holding member 33. The stopper 32b is formed of, for example, a metal lump (ingot). A mark portion 32c is provided on the outer peripheral surface of the connecting rope 32 between the annular portion 32a and the stopper 32b (see FIG. 3). The mark portion 32c indicates the limit of the allowable overhang amount of the net body 1, and is, for example, a colored portion or a portion on which a predetermined mark is engraved.
For example, as shown in FIG. 2, when the tensile force due to the overhang of the net body 1 does not act on the connecting rope 32 or the action is slight, the mark portion 32c is located inside the holding member 33 and cannot be visually recognized from the outside.

  The holding member 33 movably holds the fixed rope 31b of the fixed member 31 and the connecting rope 32. The holding member 33 has a hole (not shown) through which the fixed rope 31b is inserted and a hole (not shown) through which the connecting rope 32 is inserted. These holes are formed smaller than the stoppers 31c and 32b, respectively. The fixed rope 31b and the connecting rope 32 are movable relative to the holding member 33. In other words, the holding member 33 can move between the stopper 31c and the anchor member 31a in the fixed rope 31b, and can move between the annular portion 32a and the stopper 32b in the connecting rope 32.

<Operation of the regulation unit>
As shown in FIG. 2, when the net body 1 is deformed and the rockfall R is deposited to such an extent that it does not project to the road S side, or when there is no rockfall between the net body 1 and the ground G, the rockfall R Since the mesh body 1 is not stretched by the above, and the tensile force due to the mesh body 1 being stretched is not acting on the connecting rope 32 fixed to the vertical rope 21, the connecting rope 32 is not moved.
In this state, the stopper 32b of the connecting rope 32 is located apart from the holding member 33 and is not in contact with the holding member 33. Further, the holding member 33 is at a position apart from the stopper 31c of the fixed rope 31b of the fixed member 31 and is not in contact with the stopper 31c.

As shown in FIG. 3, as the rockfall R accumulates between the net body 1 and the ground G, the rockfall R pushes the net body 1 toward the road S side, so that the net body 1 starts to overhang. When the net body 1 tries to project to the road S side, the tensile force associated with the projection of the net body 1 acts on the connecting rope 32 via the vertical rope 21, and the connecting rope 32 is also pulled to the road S side. The connecting rope 32 moves relative to the holding member 33 until the stopper 32b contacts the holding member 33.
When the stopper 32b of the connecting rope 32 contacts the holding member 33, the holding member 33 is moved by the stopper 32b of the connecting rope 32 on the fixed rope 31b until it contacts the stopper 31c. When the holding member 33 contacts the stopper 31c, the movement of the connecting rope 32 ends.

  The state in which the connecting rope 32 does not move is a state in which the regulating portion 3 regulates the amount of protrusion of the net body 1. In a state where the movement of the connecting rope 32 is restricted, the mark portion 32c of the connecting rope 32 is exposed from the holding member 33 to the annular portion 32a side. When this mark portion 32c is exposed from the holding member 33 to the annular portion 32a side, it means that the amount of protrusion of the net body 1 has reached the limit amount or is approaching the limit amount.

  As described above, according to the rockfall protection device 100, the vertical rope 21 of the supporting portion 2 that supports the net body 1 and the fixed rope 31b of the fixing member 31 fixed to the ground G are included in the regulating portion 3. They are connected by a connecting rope 32. As a result, the net body 1 is connected to the ground G, and the restricting portion 3 can restrict the net body 1 from projecting toward the road S by a predetermined amount or more.

  Moreover, since the connecting rope 32 is movable toward the road S side with respect to the fixed rope 31b of the fixing member 31 via the holding member 33, the impact caused by the collision of the falling rock R on the net 1 is mitigated. You can do it.

  Further, since the connecting rope 32 is provided with the mark portion 32c, it is only necessary to confirm whether or not the mark portion 32c is exposed from the holding member 33 to the annular portion 32a side during maintenance and inspection. A maintenance worker can easily determine whether or not to remove stones.

  Further, since the position where the fixed rope 31b and the anchor member 31a are fixed is higher than the position where the annular portion 32a is fixed to the fastener C3, it is possible that the net body 1 is projected by the limit amount. Even if there is, the anchor member 31a is securely fixed to the ground G by the force applied to the regulation portion 3 in the direction of the slope.

<Other>
The connecting rope 32 of the restriction portion 3 may be fixed to the net body 1.
Further, the connecting ropes 32 of the restricting portion 3 may not be connected to the respective vertical ropes 21, and for example, may be connected to every other connecting ropes 32, especially to the connecting ropes 32 fixed to the support columns P. Good. Further, the connecting rope 32 may be fixed to at least one of the vertical rope 21 and the horizontal rope 22 of the supporting portion 2, and the fixing place with the supporting portion 2 is not particularly limited. Further, the connecting rope 32 may be connected to a fastener C2 that holds the ropes 21 and 22 at the intersection of the vertical rope 21 and the horizontal rope 22.
Further, the holding member 33 may be fixed to the fixed rope 31b or the connecting rope 32, and may be movable with respect to the fixed rope 31b or the connecting rope 32 that is not fixed.
Further, the connecting rope 32 may be directly fixed to a portion of the fixing member 31 exposed from the ground G. In this case, the length of the connecting rope 32 defines the limit of the protruding amount of the net body 1.
Further, the fixed rope 31b may have a mark portion that is exposed from the holding member 33 to the anchor member 31a side when the stopper 31c abuts on the holding member 33, or both the connecting member 32 and the fixing member 31. May have a mark part.
Further, the restriction portion may be configured to include a cylinder and a piston slidably provided in the cylinder. In this case, the cylinder is embedded in the ground G, and the tip of the piston exposed from the cylinder can be fixed to the net body 1 or the vertical rope 21 or the horizontal rope 22 directly or via the connecting rope 32. it can.

<Other Embodiments>
Next, another embodiment of the restriction unit will be described with reference to FIG. It should be noted that the same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted. FIG. 4 is a schematic diagram showing a restricting portion according to another embodiment.
4A includes a fixing member 31 and a holding member 33A, and does not include the connecting member 32 in the above-described embodiment. The holding member 33A has a hole (not shown) through which the fixed rope 31b is inserted and a hole (not shown) through which the vertical rope 21 is inserted, and is fixed to the vertical rope 21. In this case, the length of the fixed rope 31b defines the limit of the protruding amount of the net body 1. When the restricting portion 3A is used, the fastener C3 can be omitted.

<Other>
Note that the rockfall protection device may be configured using both the restriction unit 3 and the restriction unit 3A.
In addition, the holding member 33A may have a hole through which the horizontal rope 22 is inserted, and may be fixed to the horizontal rope 22.

DESCRIPTION OF SYMBOLS 1 capture | acquisition part 2 support part 21 1st support member 22 2nd support member 3,3A regulation part 31 fixing member 31a anchor member 31b fixed rope 31c stopper 32 connecting member 32a annular part 32b stopper 32c mark part 33, 33A holding member. G Ground R Rockfall S Road

Claims (5)

It is installed on the ground of the slope,
A trapping portion that traps rockfall and guides the rockfall to the slope of the ground ,
A rope-shaped support portion that is attached to the capture portion and stretches and supports the capture portion on the ground,
One end is fixed to the ground, the other end is fixed to the capture unit or the support unit, a restriction unit for restricting the amount of protrusion of the capture unit from the ground,
Equipped with
The restriction unit is
A fixing member having one end fixed to the ground,
A connecting member having one end attached to the capturing portion or the supporting portion and connected to the fixing member at the other end side,
A holding member that connects and holds the fixing member and the connecting member on the other end side thereof,
Have
At least one of the fixing member and the connecting member is movable with respect to the holding member,
The other end of the connecting member is provided with a stopper that abuts on the holding member and restricts movement of the connecting member with respect to the holding member,
At least one of the connecting member and the fixing member has a mark portion that is exposed from the holding member when the stopper abuts on the holding member . The rockfall protection device according to claim 1 , wherein a stopper is provided at the other end of the fixing member to restrict the movement of the holding member with respect to the holding member. The support portion includes a first support member and a second support member that extend to intersect each other,
The rockfall protection device according to claim 1 or 2 , wherein the connecting member is fixed to at least one of the first supporting member and the second supporting member. It is installed on the ground of the slope,
A trapping portion that traps rockfall and guides the rockfall to the slope of the ground,
A rope-shaped support portion that is attached to the capture portion and stretches and supports the capture portion on the ground,
One end is fixed to the ground, the other end is fixed to the capture unit or the support unit, a restriction unit for restricting the amount of protrusion of the capture unit from the ground,
Equipped with
The restriction unit is
A fixing member having one end fixed to the ground,
A holding member which holds the fixing member by connecting the fixing member to the supporting portion at the other end side of the fixing member;
Have
The other end of the fixing member is movably inserted into the holding member, and a stopper is provided to restrict the movement of the holding member with respect to the fixing member when the holding member abuts . that drop stone protective equipment. The regulating unit, of claims 1 to 4, characterized in that provided so as to be higher than the other end to one end fixed to the ground is fixed to the catching portion and said support portion The rockfall protection device according to any one of claims.

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