JP3390987B2 - Rope setting method for rock fall protection and rock fall protection net - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope tensioning method for rock fall protection and rock fall etc. which is constructed on a slope (slope) where a standing tree or a base has a protruding portion or a slope (slope) such as a landslide. Concerning protective nets.

[0002]

2. Description of the Related Art As shown in FIG. 10, a conventional net for protection against falling rocks has a large number of vertical wire ropes a on a slope (slope) G.
And horizontal wire ropes b are arranged in parallel, vertically and horizontally with a space between each other, and both ends of the wire rope are connected to the end anchors c laid in the ground and stretched, and the intermediate anchor laid in the ground. d, and if necessary, an intermediate anchor or an appropriate metal fitting (not shown) is used to support the intersection of the vertical and horizontal wire ropes a and b, and a reinforcing wire rope e is vertically and horizontally arranged between the ropes to provide an appropriate metal fitting f. It has a structure in which it is connected and stretched.
Also, if there is a standing tree or a projecting part T on the slope, etc., construct by avoiding the projecting part by shifting the placement of the vertical and horizontal wire ropes a and b and the anchoring position to the left and right or up and down as shown in the figure. Has been done.

Alternatively, as shown in FIG. 11, a wire mesh g is stretched on the slope (slope) and a large number of vertical wire ropes a are formed on the wire mesh.
And the horizontal wire ropes b are arranged in parallel and vertically and horizontally with a space between them, and both ends of each wire rope are connected to the end anchor c that has been placed and stretched to form the crossing portion of the vertical and horizontal wire ropes and the wire mesh g. It has a structure in which a wire mesh and vertical and horizontal wire ropes are stretched by being supported by the placed middle anchor d and appropriate metal fittings. In addition, when there is a standing tree or a protruding portion T of the base (not shown), the wire mesh g is partially cut and stretched,
Similarly, the vertical and horizontal wire ropes are arranged and anchors are moved at different positions to avoid protrusions and the like.

[0004]

A conventional net for falling rocks and the like requires a large number of vertical wire ropes, horizontal wire ropes and a large number of anchors as shown in the drawing.
It takes a lot of time and labor to stretch and connect the vertical and horizontal wire ropes, which is extremely dangerous work. In addition, the placement position of the anchor is specified by the arrangement of the vertical and horizontal wire ropes,
Anchor performance may vary due to the need to anchor on soft ground. If there are standing trees or projecting parts on the base, it will be necessary to change the placement of the vertical and horizontal wire ropes and the anchor placement position over a wide range as shown in the figure, which causes variations in the protection performance such as falling rocks. There is.

The present invention was developed in order to solve the above-mentioned problems. The object of the present invention is to mount a large number of wire ropes on the slope by using anchors and guide fittings in the reverse direction. Arranged in a zigzag shape and stretched in a mesh shape, a reinforcing rope is attached between the ropes, a wire rope is also stretched in a mesh shape together with the wire mesh, and the cut edge of the wire mesh is reinforced with a reinforcing steel material, etc. It is intended to provide a rope tensioning method for rock fall protection work and a net for rock fall protection, which has improved rock protection performance and reliability.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a large number of end anchors and intermediate anchors are driven on a slope with a space between each other, and one end of a wire rope is connected to each end anchor. The middle part of the wire rope is successively hung or supported on a plurality of middle anchors or guide metal fittings, and arranged in a zigzag shape in the opposite direction in sequence, and the other end of each wire rope is used as an end anchor. By connecting and tensioning a number of wire ropes on the slope to form a mesh, a rope tensioning method is used to protect the falling rocks, etc. Build as a net. Since it is constructed by stretching it in a mesh shape with a large number of end anchors and intermediate anchors, etc. where a large number of wire ropes are struck as described above, it is possible to significantly reduce the number of ropes and anchors, If there is a projecting part on the base, rope tensioning can be done easily and efficiently by only slightly changing the anchoring position. In addition, since each wire rope is stretched in a mesh shape, the structure has the same protective function as the vertical and horizontal wire ropes and the wire mesh. Since two wire ropes are laid around each intermediate anchor and guide metal fitting, both wire ropes can evenly load the intermediate anchor and guide metal fittings evenly, improving anchor performance and reliability. Due to the engagement friction, the load applied to the wire rope is significantly reduced, and the rope supporting performance is enhanced. Even if there is a standing tree or a protruding part of the base, the wire rope can be easily arranged around it, and the protection performance is not significantly affected by the local change in the rope arrangement. Furthermore, if necessary, a number of reinforcing wire ropes are stretched between the ropes to reinforce and form a finer mesh to further improve the protection performance against falling stones. Protective performance and reliability can be obtained.

[0007] A wire mesh is stretched on the slope and a large number of end anchors and intermediate anchors are driven at intervals, and the end portions of the wire ropes are connected to the respective end anchors. Are sequentially arranged in a zigzag pattern in the opposite direction by the same means and stretched in a mesh shape, and the rope is stretched on the slope by the rope tensioning method to support the wire mesh with a wire rope. In addition, a wire mesh cutout is provided on the standing tree or the protruding part of the base, and a reinforcing steel material is attached along this cutout edge to make it easy to operate as a net for falling rocks. Well built. As described above, by providing the wire mesh with the cutout portion and attaching the reinforcing steel material along the cutout edge portion, the wire mesh can be easily stretched and the cutout portion is reinforced.
By arranging the wire mesh, arranging the wire mesh in the same manner as a large number of wire ropes, and supporting the wire mesh, the workability as well as the protection performance and reliability can be more effectively enhanced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of a rope tensioning method for rock fall protection work according to the present invention, and FIGS. 2 and 3 each one of an intermediate anchor and a guide fitting applied to the rope tensioning method. Example, FIG. 4 shows a first example of a net for protection against falling rocks constructed based on the rope tensioning method of the first embodiment, and FIGS. 5 to 7 shows a second example of rope tensioning method for protection against falling stones. , Fig. 8 shows load test device for wire rope and anchor, Fig. 9 shows second
The second net for protection against falling stones by the rope tensioning method of the embodiment
An example is shown. In the figure, 1 or 1a and 1b are wire ropes stretched over a slope G with an interval between them, 2 is a wire rope stretched around a protective net such as rock fall, 3 is an end anchor of the wire rope, 5 is a wire rope An intermediate part anchor, 6 is a wire rope guide metal fitting, 7 is a reinforcing wire rope, 8 is a reinforcing wire rope connecting metal fitting, 9 is a wire rope and wire mesh connecting metal fitting, 10 is a wire mesh, 11 is a stand or a projecting base. Reinforcing steel material of wire mesh attached around the portion T, 12 is a reinforcing wire at a cut portion of the wire mesh, 13 is a reinforcing wire on the side edge of the wire mesh, 15a and 15b are connecting members of the reinforcing wire, and T is a protrusion of a stand or a base. Etc., S is a cliff.

According to the present invention, as shown in the drawing, a large number of end anchors 3 and intermediate anchors 5 are driven on the slope G at intervals, and the wire ropes 1 (1a, 1b) are attached to each end anchor 3.
The end portions of the wire ropes are connected to each other, and the intermediate portions of the wire ropes are sequentially hung or supported on a plurality of intermediate portion anchors 5 or guide metal fittings 6 which are replaced with a part thereof, and the zigzag shape in the reverse direction is sequentially applied. , The other end of each wire rope is connected to the end anchor 3 and stretched, and a large number of wire ropes are stretched in a mesh shape on the slope to protect the rock fall. It is a rope tensioning method.

A large number of wire ropes 1 (1a, 1b) are formed on the slope G by the rope tensioning method for protection work such as rock fall.
Are successively laid or supported on a large number of placed intermediate anchors 3 or guide metal fittings 6 which are replaced with a part thereof, and are arranged in a zigzag pattern in the reverse direction in order to form a mesh shape. (1a, 1b) is a protective net for falling rocks and the like, which is constructed by connecting both ends of the (1a, 1b) to the end anchors 3 and stretching the structure.

Further, in the above net for protection against falling rocks,
Each wire rope 1 (1a, 1a) stretched like a mesh on the slope G
During b), a large number of reinforcing wire ropes 7 are attached at intervals with being stretched to provide a protective net for falling rocks.

A wire mesh 10 is stretched on the slope G, and a large number of end anchors 3 and intermediate anchors 5 are driven at intervals.
One end of the wire rope 1 (1a, 1b) is connected to each end anchor 3, and the intermediate portion of each wire rope is sequentially replaced with a plurality of intermediate anchors 3 or guide metal fittings 6 which are partially replaced. The wire ropes 1 (1) (1) are arranged so as to be spanned or supported, and sequentially arranged in zigzag in the opposite direction, and the other end of each wire rope is connected to the end anchor 3 and stretched.
a, 1b) is used to support the wire mesh 10, and the wire mesh is stretched on the slope G to stretch a large number of wire ropes in a mesh shape. ing.

In addition, a wire net 10 is stretched on the slope G and a large number of wire ropes 1 (1a, 1b) are laid in the middle by a rope tensioning method for protection work such as rock fall. Both ends of each wire rope 1 (1a, 1b), which are sequentially laid or supported on the partial anchor 5 or a guide metal fitting 6 which replaces a part of the partial anchor 5 and are arranged in a zigzag pattern in the reverse direction in order. Is connected to the end anchor 3 and stretched, and the wire mesh 10 is supported by a wire rope to form a slope G
A wire net 10 is stretched around the wire rope 1 (1a,
It is a net for protection against falling rocks, which is constructed by constructing 1b) in a mesh-like manner.

Further, in the above net for protection against falling rocks,
Providing a cutout portion of the wire mesh 10 on the protruding portion T of the standing tree or the base,
A protective net 11 is attached along the cut edge to provide a protective net for falling rocks.

More specifically, the wire rope 1 (1
a, 1b) and 2 are various high-strength and tough wire ropes corresponding to the size of rockfall S on the slope G, etc., and a large number of wire ropes 1 (1a, 1b) are mutually connected. The ends are connected to the end anchors 3 by placing them at appropriate intervals, and the middle part thereof is supported by the middle part anchors 5 and the guide fittings 6 and stretched in a zigzag shape to form a mesh shape as described later. It will be constructed as the main part of the net for protection against falling rocks. As for the wire rope 2, similarly, various high-strength and tough wire ropes are applied, and the wire rope 2 is connected or supported by the anchor 3 or the intermediate anchor 5 and stretched around the protection net such as rock fall, and the peripheral edge of the wire mesh 10. Attach to the section to reinforce.

For the end anchor 3, various anchors that have been previously developed and proposed or are publicly known or well known are applied to the end anchor 3 and the end of the wire rope 1 (1a, 1b) or the wire rope. It has a structure in which the two are connected or bound by an appropriate means to support them.

The intermediate anchor 5 is preferably an anchor main body 5a having an externally threaded head 5b which is placed in the ground as shown in FIG. 2, a lower plate 5c, an upper plate 5h and a stop nut 5.
n and tightening nuts 5m, etc., the lower plate portion 5c is provided with a through hole 5d of a head portion 5b provided at a central portion, a pair of guide rods 5e protruding left and right, and a protruding portion above the through hole 5d. The cylindrical guide 5g and a pair of rope support grooves 5f recessed on the lower plate portion are provided. The upper plate portion 5h includes a through hole 5i provided in the central portion and a pair of rod holes 5j recessed in the lower surface.
And a pair of rope support grooves 5k recessed on the lower surface of the upper plate
And so on. The anchor main body 5a is driven into the relatively strong ground of the slope G by an appropriate means, the stop nut 5n is screwed into the outer screw of the head 5b, and the lower plate 5c is fitted to the lower plate. The wire rope 1 (1a, 1b) is arranged as shown in the figure, the upper plate portion 5h is fitted, and the tightening nut 5m is screwed into the head portion 5b to tighten the two ropes. 1
(1a, 1b) is laid across both sides of the cylindrical guide 5g so as to be crossed and guided, and sandwiched between the lower plate portion 5c and the upper plate portion 5h to be arranged and supported in a zigzag shape. The wire rod of the wire net 10 is also sandwiched and supported.

The guide metal member 6 is preferably a lower plate portion 6c, an upper plate portion 6h, bolts 6m and nuts 6 as shown in FIG.
n etc. The lower plate portion 6c has a through hole 6 provided in the central portion.
d, a pair of guide rods 6e protruding left and right, and a pair of rope supporting grooves 5f recessed in the upper surface.
The upper plate portion 6h is provided with a through hole 6i provided in the central portion, a pair of rod holes 6j provided in the left and right portions, a pair of rope support grooves 6k recessed in the lower surface, and the like. Lower plate 6 as shown
The wire rope 1 (1a) or 1 (1b) is laid over each guide rod 6e of c to guide it, the upper plate portion 6h is arranged on the lower sandwiched portion 6c, and the bolt 6m is fitted to tighten the nut 6n.
2 wire ropes 1 (1a, 1
b) is bridged over each guide rod 6e to be guided, and sandwiched by the lower plate portion 6c and the upper plate portion 6h to be supported in a zigzag shape. The wire rope of the wire netting 10 can also be held by holding the intersection of the wire ropes.

Further, as the wire net 10, various kinds of wire nets formed to have appropriate strength and mesh size corresponding to the size of rock S etc., and preferably, thick wire nets formed thick as shown in FIG. This thick wire net 10 has a large number of rings 10a formed in a thickness t as shown in the drawing,
In addition, it has a structure of a wire mesh connected in series in a diagonal pattern (not shown) in a plan view. As shown in FIG. 7, when the wire mesh 10 is stretched on a standing tree or a protruding portion T of a base, the wire mesh 10 is partially cut off at the protruding portion T of the base, and the reinforcing steel material 11 is cut along the cut edge portion. Attach by wire wire end of wire mesh, etc. to reinforce. Also, in the case of a tall standing tree, similarly, by cutting off the standing tree portion and cutting from the cut edge portion to the edge portion with the reinforcing steel material 13 of the wire mesh 10, the wire mesh 10 is easily arranged around the standing tree, A reinforcing steel material 11 is similarly attached to the cut edge portion to reinforce, and a reinforcing steel material 12 is attached to the cut portion.
The wire mesh 10 can be easily arranged by connecting the reinforcing steel materials 13 with each other by connecting them with the connecting wire 15a. Attach wire mesh wire rods to the stretched wire rope 1 (1a, 1b) with U bolts.
The nut 9 (see FIG. 6), the intermediate anchor 5, the guide metal fitting 6, and the like are connected and supported.

A rope tensioning method for rock fall protection work (see FIG. 1) shown in FIG. 1 is a plan view showing an enlarged basic rope tensioning method. As shown in the figure, a large number of end anchors 3 and intermediate anchors 5 are laid on the slope G where there is a risk of falling rocks, etc. at appropriate intervals, and the wire ropes 1 (1a, 1b) are attached to the respective end anchors 3. ) Of the wire rope 1 (1a) on the left side of the drawing is sequentially hung over the guide metal fitting 6 and the intermediate anchor 5 and arranged in a zigzag shape in the right direction of the drawing, Adjacent wire rope 1
The intermediate part of (1b) is sequentially laid over the same guide metal fitting 6 and the intermediate part anchor 5 to be arranged in a zigzag shape in the left direction in the drawing, and further, the intermediate part of each wire rope 1 (1a, 1b) is sequentially reversed. The wire ropes 1 (1a, 1a) are arranged in a zigzag shape in the same direction, and the other end of each wire rope 1 (1a) is connected to the end anchor 3 and stretched.
b) is stretched in a mesh shape, and appropriate tension is applied to each wire rope so as to protect the falling rock S of the slope G by holding down the falling rock S of the slope G.

In addition, a protective net for floating stones (first
The embodiment) is an embodiment constructed on a slope G where there is a risk that the floating stone S may fall due to standing trees or protruding portions T of the base. As shown in the figure, a large number of end anchors 3 and intermediate anchors 5 are driven on the slope G in the left, right, up and down directions in the figure, avoiding the projecting portions T, and a large number of wire ropes 1 (1a, 1b) are attached. Attached to the end anchors 3, similarly arranged in a zigzag shape with the intermediate anchors 5 and the guide fittings 6 to form a knitted shape, the other end is connected to the end anchors 3 and stretched, and each wire rope 1 Reinforcing wire rope 7 is connected between (1a, 1b) by an appropriate means to reinforce, and wire rope 2 is appropriately provided between end anchors 3 on the upper and lower sides in the drawing and intermediate anchors 5 on the left and right in the drawing. It is stretched by connecting by means of the above means, and the whole circumference is reinforced to correspond to the floating stones S to construct a finer stitch size.

As shown in FIG. 8, a plurality of end anchors 3 and intermediate anchors 5 are driven at intervals, and a plurality of wire ropes 1 (1) are attached to each end anchor 3 and intermediate anchor 5.
a, 1b) are arranged in a zigzag shape as shown in the figure, and tension gauges 21a, 21b, 2 are attached to each wire rope and the intermediate anchor.
As a result of testing by applying a load F to the lower end of the wire rope 1 (1a, 1b) using a load tester equipped with 1c, two wire ropes are attached to the tubular guide 5g of the intermediate anchor 5 on both sides. From the both sides in a cross shape, the middle anchor is loaded from both sides with a substantially equal load, and the anchor performance and reliability are effectively enhanced. Further, by straddling the wire rope around at least two intermediate anchors 5 and stretching it in a zigzag shape, the load applied to the wire rope is significantly reduced to about 1/2 or 1/3 through the intermediate anchors. It was confirmed that the protection performance and reliability of rock fall were effectively improved.

The rope erection method for floating rock protection works and the floating net protection nets shown in FIGS.
(1a and 1b) are alternately laid on the guide metal fitting 6 and the intermediate anchor 5 and stretched in a zigzag mesh. However, if necessary, only the intermediate anchor 5 can be used for each wire rope 1 (1
It is also possible to stretch a, 1b) in a stitch shape as shown. Further, the combination of the guide metal fitting 6 and the intermediate anchor 5 is not limited to the illustrated example, and can be various modes.

The rope tensioning method and the net for protection against falling rocks, etc. of the first embodiment are constructed by placing a large number of end anchors 3 and intermediate anchors 5 and wire ropes 1 (1a, 1b) as described above.
One end of the wire rope is connected to the end anchor 3, the intermediate portion of the wire rope is bridged to the intermediate anchor 5 and the guide metal fitting 6, and the other end of each wire rope is connected to the end anchor 3. Each wire rope 1 (1a, 1b) is stretched in a mesh shape on the slope G by a relatively simple process to construct a net for falling rock protection. The end anchors 3 and the intermediate anchors 5 can be placed by selecting a relatively strong ground, and the anchor performance and reliability are improved. Each wire rope 1 (1
a, 1b) are easily stretched in a mesh shape by straddling each of the placed intermediate anchors 5 and guide metal fittings 6. Either the conventional vertical wire rope or the horizontal wire rope can be saved, and the number of ropes and the number of anchors can be significantly reduced. If there is a standing tree or a protruding portion T of the base, rope tensioning can be easily and efficiently performed by only slightly changing the placement position of the intermediate anchor 5. Further, the wire ropes are stretched in a mesh shape by the unidirectional wire ropes, and the structure also has the protection function of the vertical and horizontal wire ropes and the wire mesh. By loading the two adjacent wire ropes 1a and 1b in opposite directions, loads are applied to the intermediate anchors 5 and the guide metal fittings 6 almost evenly, and the anchor heads are supported, resulting in anchor performance and reliability. Is increased. Due to this engagement friction, the load applied to the wire rope is significantly reduced, and the rope support performance is improved. Even if there are Ts such as standing trees or protruding parts of the base, it is only necessary to locally change the rope arrangement to some extent, and it does not have any particular effect on protection performance. Further, by arranging a large number of reinforcing wire ropes 7 between the ropes as necessary, the net for protection against falling rocks is reinforced and formed into a finer mesh, so that even smaller rocks can be protected. It has characteristics.

The rope tensioning method for protecting rock fall etc. (second embodiment) shown in FIG. 5 is an example of the rope tensioning method in which a wire net is stretched and wire ropes are stretched in different modes. That is,
As shown in the figure, a wire mesh 10 is stretched on the slope G, and a large number of end anchors 3 and intermediate anchors 5 are driven at intervals so that each end anchor 3 has a wire rope 1 (1a, 1).
One end of b) is connected by an appropriate means, the middle part of the wire rope 1 (1a) on the left side in the figure is sequentially hung over the intermediate part anchor 5 and arranged in a zigzag shape in the right direction in the figure, and the wire rope near The intermediate part of 1 (1b) is sequentially laid over each of the adjacent intermediate part anchors 5 in a zigzag pattern, and the intermediate part of each wire rope 1 (1a, 1b) is similarly laid over in the reverse direction. Zigzag, and the guide metal fitting 6 sandwiches the rope intersection between the end anchors 3 and the intermediate anchors 5 or between the intermediate anchors, and a large number of wire ropes are formed on the slope G. 1 (1a, 1b) the intermediate portion is arranged in a mesh shape with the intermediate anchor 5 and the guide metal fitting 6,
The wire rope 1 (1a, 1b) is connected to the end anchors 3 by connecting the lower ends of the wire ropes 1 (1a, 1b) with a proper tension so that the wire ropes 1 can be protected by pressing down rocks S on the slope G. , A net-sized protection net for falling rocks suitable for holding down and protecting the falling rocks S on the slope G.

In addition, the rocket protection net (see FIG. 9) of the second embodiment is constructed by constructing a rocket protection net on the slope G where there is a risk of falling of the standing tree, the protrusion of the base, etc. and the float S. Here is an example. On the slope G, as shown in FIG. 7, the wire net 10 of the standing tree or the protruding portion T of the base is partially cut and cut, and the reinforcing steel material 11 is attached along the cut edge to reinforce the wire rope 2 to the wire net. A wire mesh 10 is stretched on the slope G by inserting it through the peripheral portion of the wall to reinforce it, and avoiding the position of the stand T, the protruding portion T of the base, or the like, a large number of end anchors 3 and intermediate anchors 5. Are laid at intervals, and a large number of wire ropes 1 (1a, 1b) are stretched in a mesh shape by the same means, and the wire rod 1 (1a, 1a, 1b,
1b) to a suitable connecting means (U bolt nut 9 in FIG. 6).
Etc.) is constructed as a net for protection of floating stones etc. If necessary, each wire rope 1 (1a, 1a
It is also possible to attach a large number of reinforcing wire ropes 7 between b) to reinforce and to construct a finer mesh (not shown).

The rope tensioning method shown in FIGS. 5 and 9 and the net for protection against falling rocks (second embodiment) are obtained by partially cutting out the wire mesh 10 at the protruding portion T of the standing tree or the base as described above. Accordingly, the wire mesh 10 can be easily stretched by further providing a cut portion extending to the edge portion, and the cut steel edge portion is reinforced by attaching the reinforcing steel material 11 or the wire rope 2. If a thick wire net (see FIG. 6) is applied, even if it is buried in the topsoil of the slope G to some extent, the fall prevention performance of the floating stones S can be secured for a long time. Further, the wire rope 1 (1a, 1b) stretched in a mesh shape has excellent workability and protection performance against floating stones as described above, and remarkably enhances the protection performance and reliability together with the wire net 10.

The first embodiment shown in FIGS. 1 and 4 is a basic rope tensioning method of the present invention, and the second embodiment shown in FIGS. 5 and 9 is a modification of wire mesh tensioning and rope tensioning. It is a thing. The present invention is not limited to the first and second embodiments, and can be modified based on the configurations described in the claims. Further, the intermediate anchor 5 and the guide metal fitting 6 are not limited to the illustrated examples, and various structures having similar functions can be applied.

[0029]

Industrial Applicability The present invention is constructed by the rope tensioning method and the protective net for falling rocks as described above. The anchor of the end part and the anchor of the intermediate part are placed, the one end of the rope is connected to the end anchor, and the intermediate part of the rope is formed. By a relatively simple process such as zigzag arrangement of the part, connection to the end anchor of the other end of the rope,
It is easily constructed as a protective net for falling rocks, etc., where many wire ropes are stretched like a mesh on the slope. The number of ropes and anchors can be greatly reduced, and even if there are standing trees or projecting parts of the foundation, the rope can be easily and efficiently constructed by changing the position of anchoring. In addition, each wire rope stretched in a mesh shape also has the same protection function as vertical and horizontal wire ropes and wire netting, and by hooking the two wire ropes in the opposite direction, it is almost evenly distributed over the intermediate anchors and guide fittings. Once the load is increased, the anchor performance and reliability are enhanced, and the load applied to the wire rope is significantly reduced due to the engagement friction, and the rope support performance is enhanced. Even if there are standing trees or protruding parts of the base, the wire rope can be easily placed, and the protective performance is not particularly affected. By arranging a reinforcing wire rope between the ropes, it is reinforced and formed into a finer mesh shape, which significantly improves the workability, protection performance, and reliability as a whole.

A wire mesh is stretched on the slope, a large number of end anchors and intermediate anchors are driven at intervals, and a large number of wire ropes are stretched in a mesh shape by the same means.
It is easily and efficiently constructed as a net for falling rocks, etc., in which a large number of wire ropes are stretched in a mesh shape together with a wire net. In addition, a reinforcing steel material is attached along the cutout edge of the wire mesh provided on the standing tree or the protruding portion of the base to facilitate the tensioning of the wire mesh and reinforce it. Has improved.

[Brief description of drawings]

FIG. 1 is an enlarged partial plan view showing a first embodiment of a rope tensioning method for protective works such as rock fall.

FIG. 2 is an enlarged plan view (A) and an XX cross-sectional view (B) showing an embodiment of the anchor.

FIG. 3 is an enlarged plan view showing an embodiment of a guide fitting (A).
And its YY sectional view (B)

FIG. 4 is an overall plan view showing a first embodiment of a protective net for falling rocks.

FIG. 5 is an enlarged partial plan view showing a second embodiment of a rope tensioning method for protection works such as rock fall.

FIG. 6 is a sectional view showing an example of a thick wire net.

FIG. 7 is a plan view showing the arrangement of wire netting on the protrusions of a standing tree or a base.

FIG. 8 is a mechanism diagram showing a load test device applied to an anchor and a wire rope.

FIG. 9 is an overall plan view showing a second embodiment of a protective net for falling rocks, etc.

FIG. 10 is an overall plan view showing a conventional example of a protective net for falling rocks.

FIG. 11 is an overall plan view showing another conventional example of a protective net for falling rocks.

[Explanation of symbols]

1 (1a, 1b) wire rope 3 end anchor 5 Middle anchor 6 Guide bracket 7 Reinforcing wire rope 10 wire mesh 11 Reinforced steel T Stands and protruding parts of foundations, etc. G slope

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasunori Yoshida 1-3-2 Chuo, Aoba-ku, Sendai, Tokyo Sendai Co., Ltd. Sendai Branch (56) Reference JP-A-7-300820 (JP, A) Development 56-51847 (JP, A) Actual development 55-40061 (JP, U) Actual development 62-172739 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E02D 17 / 20 103 E02D 17/20 106 E01F 7/04

Claims (6)

(57) [Claims] 1. A plurality of end anchors and intermediate anchors are placed on a slope with an interval between each other, and one end of a wire rope is connected to each end anchor to form a plurality of intermediate portions of each wire rope. Of the wire ropes are sequentially laid or supported on the intermediate anchor of the wire or a guide metal fitting that replaces a part of the wire, and the wires are arranged in zigzag in the opposite direction in sequence, and the other end of each wire rope is connected to the end anchor. A rope tensioning method for rock fall protection works, which is characterized in that a large number of wire ropes are stretched in a mesh shape on the slope. 2. The guide metal fitting, wherein the rope anchoring method for rock fall protection according to claim 1 is used in place of a large number of wire ropes on the slope to form an intermediate anchor or a part thereof. It is constructed by constructing a structure in which both ends of each wire rope are connected to end anchors and stretched so as to be laid in a mesh shape by sequentially laying or supporting them in a zigzag pattern in the opposite direction. A protective net for falling rocks. 3. The rockfall protection net according to claim 2, wherein a large number of reinforcing wire ropes are attached at intervals between the wire ropes stretched in a mesh on the slope. A characteristic net for protection against falling rocks. 4. A wire mesh is stretched on a slope, a plurality of end anchors and intermediate anchors are driven at intervals, and one end of the wire rope is connected to each end anchor, and each end of the wire rope is connected. The intermediate part is successively laid over or supported by a plurality of intermediate part anchors or a guide metal fitting that replaces a part thereof, and the intermediate parts are sequentially arranged in zigzag in the opposite direction, and the other end of each wire rope is terminated. Connected to the part anchor and stretched,
A rope tensioning method for rock fall protection works, in which a wire mesh is supported by a wire rope and a wire mesh is stretched on the slope to stretch a large number of wire ropes in a mesh shape. 5. A rope anchoring method for rockfall protection work according to claim 4, in which a wire mesh is stretched on the slope and at the same time, a large number of wire ropes are laid in a large number of intermediate anchors or their anchors. It is made into a knitted shape that is sequentially laid over or supported by a guide metal fitting that has been replaced with a part, and is sequentially arranged in a zigzag pattern in the opposite direction, and both ends of each wire rope are connected to end anchors and stretched. A net for protection against falling rocks, which is constructed by constructing a structure in which a wire mesh is supported by ropes. 6. The rockfall protection net according to claim 5, wherein a cutout portion of a wire mesh is provided on a protruding portion of a standing tree or a base, and a reinforcing steel material is attached along the cutout edge portion. Equal protection net.