JP2005336720A - Slope falling rock protective structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slope falling rock protective structure superior in workability for stably fixing a corner part of nets, while easily installing the nets. <P>SOLUTION: A plurality of nets 11 and 11 composed of a synthetic resin are juxtaposed, to cover a slope with these nets 11 and 11. The nets 11 have a rope material 16 being an edge rope material on the four sides, and have a fixture 21 for installing the corner part 11K of the nets 11 on the slope. The nets and a rope can be simultaneously arranged by juxtaposing a plurality of nets 11 having the rope material 16, and the workability is improved. The corner part 11K of the plurality of nets 11 can be efficiently fixed by having a locking shaft for locking the corner part 11K of the nets 11. The rope does not overlap each other like a conventional rope, and unreasonable force is not applied to the rope material 16 by a fixation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a slope falling rock protection structure that protects a slope by preventing rock fall and landslide on the slope.

  Conventionally, as this kind of thing, a wire mesh is stretched along the slope of the slope, and a plurality of vertical wire ropes and horizontal wire ropes anchored at both ends on the wire mesh are left and right, and falling rocks are stretched at vertical intervals, etc. At the same time, the anchor rod with a bit having a mortar injection hole is driven into the slope, and at the same time, the mortar is injected from the tip of the rod into the ground around the rod through the mortar injection hole, and the anchor rod is driven into the slope and cured. After that, a protective structure (for example, Patent Document 1) in which a support plate and a presser plate are attached to the upper portion of the anchor rod, and at least the vertical and horizontal wire ropes are sandwiched and fixed and the wire mesh is pressed on the slope to be anchored. There is.

  As in the above prior art, in the protection structure using this type of net, a wire rope or a wire net is combined to cover the slope and protect. However, in such a protective structure, since a net | network and a wire rope material are constructed separately, there exists a surface inferior to workability.

  Furthermore, in the case of using a steel wire rope or net, since the member itself becomes a heavy object, a heavy machine for installation is required, and there is a problem that the construction range is limited, the construction period is prolonged, and the construction cost is increased. And since the protection structure provided for rock fall rock protection is often provided on the slopes of mountains that are unsuitable for heavy machinery use, in the construction of providing protection bodies on such slopes, the members are heavy. If it exists, the carrying-in operation | work will become complicated and there exists a problem inferior to workability.

Therefore, it is excellent in workability, enables construction at a low cost with a simple construction method, and uses a net that allows easy replacement of the net, in a protective structure that covers the slope with a net, the net is made of synthetic resin, A protective structure (for example, Patent Document 2) including an anchor and a lock bolt for installing the net on a slope has been proposed.
JP-A-7-300820 (FIGS. 1 and 2) JP 2003-261910 A (FIGS. 17 and 18)

  The protective fence using the mesh made of the synthetic resin is excellent in workability, can be constructed at a low cost by simplifying the construction method, and can easily be replaced when necessary.

  By the way, when a large area is covered using a net made of a synthetic resin as described above, a plurality of nets are required, and when a conventional anchor is used for mounting, it cannot be mounted efficiently. Therefore, for example, if the bearing plate and presser plate of Patent Document 1 are used to fix the corners of the four meshes, the meshes are overlapped and are not stable, and are made of synthetic resin. If the corners that overlap the quadruple are tightened with the bearing plate and the presser plate, the corners may be damaged.

  Therefore, an object of the present invention is to provide a slope fall rock protection structure that can easily install a net, stably fix a corner of the net, and is excellent in workability.

  The invention of claim 1 is a slope protection structure in which a plurality of meshes made of synthetic resin are arranged and the slopes are covered with these meshes, the meshes having edge rope members in all directions, and the corners of the meshes It is equipped with a fixture to be attached to the slope.

  According to a second aspect of the present invention, there is provided a fixture main body having a locking portion that is provided corresponding to a corner portion of a plurality of meshes, and that the corner portion locks. And fixing means for fixing to.

  Further, the invention of claim 3 has four of the locking portions, and the corner portions of four adjacent meshes are fixed to the slope by the fixture.

  According to a fourth aspect of the present invention, the edge rope material at the corner is locked to the locking portion, and the four locking portions are arranged at substantially equal intervals around the fixing means.

  According to a fifth aspect of the present invention, the fixing means is an anchor, and the fixture main body is formed on the upper and lower base portions and the upper and lower base portions that are detachably provided with the locking portions interposed therebetween. And an insertion hole through which the anchor is inserted.

  According to the structure of Claim 1, a net | network and a rope can be provided simultaneously by arranging the net | network which has an edge rope material, and it becomes the thing excellent in workability.

  Moreover, according to the structure of Claim 2, the corner | angular part of a some net | network can be efficiently fixed by latching the corner | angular part of a net | network to a latching | locking part, and fixing a fixture main body to a slope.

  Moreover, according to the structure of Claim 3, the corner | angular part of four mesh | networks can be fixed to a slope with one fixture.

  According to the fourth aspect of the present invention, the corners of the four nets can be arranged and fixed at substantially equal positions with respect to the fixing means.

  According to the fifth aspect of the present invention, the corner portions are locked to the locking portions, the upper and lower base portions are assembled, and the anchors inserted through the upper and lower base portions are fixed to the inclined surface. Fix it.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, an unprecedented slope fall rock protection structure is obtained by adopting a slope fall rock protection structure different from the conventional one, and the slope fall rock protection structure is described respectively.

  Hereinafter, Embodiment 1 of the guard fence of the present invention will be described with reference to FIGS. As shown in the figure, the slope rockfall protection structure 1 includes a plurality of nets 11 and a fixture 21 for attaching the nets 11 to the slope. The net 11 has a substantially rectangular shape on the front, and in this example, a substantially square shape is used.

  As shown in FIGS. 6-8, the said net | network 11 is a penetration type non-knotty net | network which consists of synthetic resins, for example, twists the fiber yarns 12 and 12A made from a synthetic resin, and forms the wire materials 13 and 13A, These wire rods 13 and 13A have a crossing direction, and are fixed to each other by a crossing portion 14 by a knotless bar. There is a Russell type for the knotless net, but a penetration type is preferably used. FIG. 6 is an explanatory view for explaining the structure. As shown in FIG. 6, at the intersecting portion 14 of the wire rods 13 and 13A, the ring portion 15 formed by a gap between the fiber yarns 12 and 12 of the one wire rod 13 is formed. By inserting the fiber yarns 12A and 12A of the other wire rod 13A from the front and back directions, and twisting the fiber yarns 12 and 12A at the crossing portion 14 and closing the ring portions 15 and 15A, both the wire rods 13 and 13A are inserted. Is fixed at the intersection 14. Reference numeral 15A denotes an annular portion formed by a gap between the fiber yarns 12A and 12A at the intersecting portion 14. 6 is shown with the ring portions 15 and 15A opened for explanation, but in the actual net 11, the ring portions 15 and 15A have a closed structure.

  Further, the net 11 has a substantially rectangular shape, and a rope member 16 as an edge rope member is provided on the four edges of the net 11. Further, as shown in FIGS. 7 and 8, the end portions of the wire rods 13 and 13A in the rope member 16 are folded back, and the wire rods 13 and 13A are fixed to each other by overlapping portions 18 of the wire rods 13 and 13A. , 13A is disposed between the rope members 16.

  The synthetic resin used for the net 11 is preferably high-density polyethylene or the like, and when the high-density polyethylene is used, the specific gravity of the net 11 is 0.94 to 0.96. If necessary, the weather resistance can be improved by using carbon black or an ultraviolet absorber for the net 11.

  The protective structure 1 is a mountain slope covered with rocks (not shown) or the like covered with a plurality of nets 11, and a corner 11 </ b> K of the net 11 is fixed to the slope with a fixture 21. In this example, the corner portion 11K is a bent corner portion of the rope member 16.

  As shown in FIGS. 3 to 5, the fixture 21 is formed with through holes 24, 24 at the center of the upper and lower bale portions 22, 23 that are the plate body as the fixture body. Locking shafts 25, 25, 25, 25, which are locking portions, are provided at equal intervals, and the interval (gap) between the adjacent locking shafts 25, 25 is at least twice the diameter of the rope member 16, In this example, the diameter of the rope member 16 is approximately twice. Further, the distance between the through hole 24 and the locking shaft 25 is equal to or greater than the diameter of the rope member 16, and in this example, is approximately equal to the diameter of the rope member 16. Therefore, the corners 11K, 11K, 11K, 11K of the plurality of nets 11, 11, 11, 11 can be positioned on substantially the same plane and locked to the locking shafts 25, 25, 25, 25. Then, the locking shaft 25 is fixed to the lower base portion 23, and as shown in FIG. 5, a stepped portion 25A is formed on the outer periphery of the upper portion of the locking shaft 25, and a stepped hole is engaged with the stepped portion 25A. 26 is formed in the upper base portion 22. The locking shaft 25 has a cylindrical shape, and a portion where the rope material 16 is locked is a curved surface. Further, on the inner surfaces of the upper and lower base portions 22, 23, a rubber pad 27 as an elastic member is integrally provided by adhesion or the like, and a hole communicating with the through hole 24 is also provided in the rubber pad 27 of the lower base portion 23, The rubber pad 27 of the upper base portion 23 is also provided with a hole communicating with the through hole 24 and the stepped hole 26. Therefore, the upper and lower base portions 22 and 23 can be assembled by detachably inserting the step portion 25A into the stepped hole 26. As shown in FIG. 4, an anchor 28 as a fixing means is inserted into the through holes 24, 24, the anchor 28 is fixed to the inclined surface, and a nut 29 is screwed into the upper screw portion of the anchor 28.

  31 is an auxiliary anchor, and fixes the center side of the rope member 16 to the slope. Further, if necessary, the rope members 16 and 16 of the adjacent nets 11 and 11 are connected by the connecting fiber rope 32. In this case, as shown in FIG. 9 and the like, the ropes 16 and 16 can be connected by knitting a connection fiber rope 32 in a spiral shape.

  Next, the construction method of the protective structure 1 will be described. As shown in FIG. 1, a plurality of nets 11 are formed on the slope so that the ropes 16 and 16 of the nets 11 and 11 adjacent to each other are vertically and horizontally aligned. The corners 11K of the net 11 are aligned, the two corners 11K, 11K are adjacent to each other around the whole, and the four corners 11K, 11K, 11K, 11K are adjacent to each other on the center side. The fixture 21 can be used to fix the two corners 11K, 11K, the four corners 11K, 11K, 11K, 11K and one surrounding corner 11K.

  Here, the four corner portions 11K, 11K, 11K, and 11K will be described as an example. The anchor 28 is fixed to the slope at the center position of the four corner portions 11K, 11K, 11K, and 11K, and the anchor 28 is passed through the through hole 24. The lower base portion 23 is placed on the slope. Then, the four corner portions 11K, 11K, 11K, and 11K are engaged with the corresponding engagement shafts 25, 25, 25, and 25 to be engaged. Then, the four corner portions 11K, 11K, 11K, and 11K are aligned and arranged, and then the anchor 28 is passed through the through hole 24, the upper base portion 22 is covered from above, the step portion 25A and the stepped hole 26 are And the nut 29 is screwed into the anchor 28, and the upper and lower base portions 22 and 23 are fixed by the nut 29 and the slope.

  Two adjacent corners 11K and 11K are similarly fixed using two locking shafts 25 and 25, and one surrounding corner 11K is similarly fixed using one locking shaft 25. To do. Further, the adjacent rope members 16 and 16 are connected by the connecting fiber rope member 32, and the center side between the corner portions 11K and 11K of the rope member 16 is fixed to the slope by the auxiliary anchor 31.

  Thus, by arranging a plurality of nets 11 incorporating the rope material 16 around them and covering the slope, it is possible to provide the net part and the rope at the same time, which is easier to construct than the conventional net and rope separately provided. Improvements can be made. Further, the corner portion 11K of the net 11 can be simply fixed by using the fixture 21 having a plurality of locking shafts 25.

  In addition, after covering the slope with the net 11, seeds may be sprayed and greened as necessary.

  Thus, in this embodiment, corresponding to claim 1, a plurality of meshes 11, 11 made of synthetic resin are arranged, and the slope protection structure in which the slopes are covered by these meshes 11, 11, Since it has a rope member 16 that is an edge rope member in all directions and is equipped with a fixture 21 that attaches the corner 11K of the mesh 11 to the slope, a plurality of meshes 11 having the rope member 16 are arranged to simultaneously provide the mesh and the rope. It can be made and has excellent workability.

  In this way, in this embodiment, corresponding to claim 2, the fixtures 21 are provided corresponding to the corner portions 11K of the plurality of nets 11 and are locking portions to be locked by the corner portions 11K. Since the upper and lower base portions 22 and 23 as the fixture main body having the locking shaft 25 and the anchors 28 as fixing means for fixing the upper and lower base portions 22 and 23 to the inclined surface are provided, the corner portion 11K of the net 11 is provided. Is locked to the locking shaft 25 and the lower base portion 23 is fixed to the inclined surface, whereby the corner portions 11K of the plurality of nets 11 can be efficiently fixed. Further, the ropes do not overlap as in the conventional case, and an unreasonable force is not applied to the rope member 16 by the fixing.

  In this way, in this embodiment, corresponding to claim 3, there are four locking shafts 25, 25, 25, 25 as locking portions, and four adjacent nets 11, 11, 11, 11 Since the corners 11K, 11K, 11K, and 11K are fixed to the slope by the fixture 21, the corners 11K, 11K, 11K, and 11K of the four nets 11, 11, 11, and 11 are attached to the slope by the one fixture 21. Can be fixed.

  In this way, in this embodiment, corresponding to claim 4, the rope material 16 as the edge rope material of the corner portion 11K is locked to the locking shaft 25 as the locking portion, and the periphery of the anchor 28 as the fixing means Since the locking shafts 25 as the four locking portions are arranged at almost equal intervals, the corners 11K, 11K, 11K, and 11K of the four nets 11, 11, 11, 11 are almost fixed to the anchor 28 as the fixing means. It can be fixed in a line at an even position.

  In this way, in this embodiment, corresponding to claim 5, the fixing means is an anchor 28, and the fixture body is provided with a locking shaft 25 as a locking portion in between, and is detachable. Since the lower base portions 22 and 23 and the insertion holes 24 and 24 formed in the upper and lower base portions 22 and 23 and through which the anchors 28 are inserted are provided, the corner portion 11K is locked to the locking shaft, and the upper and lower While assembling the base portions 22 and 23, the anchor 21 can be fixed by fixing the anchors 28 inserted through the upper and lower base portions 22 and 23 to the slope.

  Further, as an effect on the embodiment, the nut 29 is screwed into the anchor 28, and the upper and lower base portions 22 and 23 are fixed with the nut 29 and the inclined surface, so that the upper and lower base portions 22 and 23 are fixed. There is no need to provide a separate means for assembling and fixing 23.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the embodiment, the rope material which is the edge rope material of the corner portion is locked to the locking shaft which is the locking portion, but a ring portion or the like is separately provided at the corner portion of the mesh, and the ring portion which is the corner portion is engaged. You may make it latch on a stop part.

It is a front view of the protection structure which shows Example 1 of this invention. It is sectional drawing of a protection structure same as the above. It is a plane sectional view of a fixture same as the above. It is a side view of the fixture which made the part a cross section same as the above. It is a side view of the fixture of the decomposition | disassembly state which made a part a cross section same as the above. It is a front explanatory drawing explaining the structure of a net | network same as the above. FIG. 2 is a plan development view of an end portion of a net, showing a net and a rope material. FIG. 7A is a side view of a net partly in section, FIG. 7A shows a state in which rope materials are overlapped on the end side of the net, and FIG. 7B overlaps by folding the end of the net. The state which formed the part is shown. It is an explanatory front view which shows the use condition of the fiber rope for connection same as the above.

Explanation of symbols

1 Protection structure
11 Net
11K corner
16 Rope material (edge rope material)
21 Fitting
22 Upper base (mounting tool body)
23 Lower base (mounting tool body)
24 Through hole
25 Locking shaft (locking part)
28 Anchor (fixing means)

Claims (5)

A slope protection structure in which a plurality of meshes made of synthetic resin are arranged and the slopes are covered with these meshes, the meshes having edge rope members on all sides, and provided with fixtures for attaching the corners of the meshes to the slopes. Slope fall rock protection structure characterized by that. The fixture includes a fixture main body having a locking portion that is provided corresponding to each of the corner portions of the plurality of meshes, and a fixing means for fixing the fixture main body to the slope. The slope falling rock protection structure according to claim 1, wherein: The slope falling rock protection structure according to claim 1 or 2, characterized in that it has four locking portions, and corners of four adjacent meshes are fixed to the slope by the fixture. The edge rope material of the corner portion is locked to the locking portion, and the four locking portions are arranged at substantially equal intervals around the fixing means. Slope rock fall protection structure as described in the item. The fixing means is an anchor, and the fixture main body is provided with an upper and lower base portion that is detachably provided with the locking portion therebetween, and an insertion hole that is formed in these upper and lower base portions and through which the anchor is inserted. The slope falling rock protection structure according to any one of claims 1 to 4, further comprising:

Images