JP4155567B2 - Slope stabilization method for suppressing sediment runoff and surface sediment runoff suppression member used for this - Google Patents

Description

[0001]
[Technical field belonging to the invention]
The present invention relates to a slope stabilization method for stabilizing a slope with a large number of anchors, bearing members attached to the anchor head, and a rope connecting the anchor head, and in particular, enables suppression of surface sediment discharge. relates to slope stability modified method and surface sediment discharge suppressing member used therefor.
[0002]
[Prior art]
A slope stabilization method that installs a large number of anchors on the slope, attaches a bearing member to the head of each anchor, tightens it to give support pressure to the ground, and connects the anchor heads with wire ropes Since it is possible to stabilize the slope by leaving the trees, the natural slope stabilization work is better in terms of environmental protection, landscape, etc. compared to the glue frame construction method in which a grid-like frame made of concrete or mortar is installed on the slope. It is excellent as a law.
However, this slope stabilization method using anchors, bearing members, and wire ropes is a method that leaves trees and grass that grow naturally on the slope, so it is possible to prevent sediment from flowing out on slopes with plants. However, unlike the glue frame method, the slope is not partitioned by a structure, and the weak point is that the effect of preventing the outflow of surface soil is low on slopes where there are no plants. In this case, the reinforcing ribs and the wire rope of the bearing member slightly contribute to the suppression of the outflow of the surface soil, but it is difficult to supplement more than a certain amount of soil.
[0003]
In addition, in order to suppress sediment discharge with this type of slope stabilization method, a method of passing a belt-like net member between the bearing member and the bearing member at a right angle or an angle to the slope is disclosed in this application. It is an applicant's patent (see Japanese Patent No. 3374661).
[0004]
[Patent Document 1]
Japanese Patent No. 3374061
[Problems to be solved by the invention]
As described above, the surface sediment discharge suppression effect by the pressure bearing member and the wire rope is not sufficient, although there is a slight effect on the slope where there is no plant. On the other hand, the method of passing the belt-like mesh member between the support members can effectively suppress the surface sediment discharge, but the work of passing the mesh member is somewhat troublesome and the cost is slightly increased. There are drawbacks.
[0006]
The present invention has been made under the above background, strive to slope stabilization at anchor and bearing capacity member rope, slope stability modified method and used for this can be achieved also enable the outflow inhibition of surface soil An object of the present invention is to provide a surface sediment runoff suppression member .
[0007]
[Means for Solving the Problems]
The present invention for solving the above-mentioned problems is that a large number of anchors are installed on the slope, and a supporting member is attached to the head of each anchor to fasten it to give a supporting pressure to the ground, and between each anchor head In the slope stabilization method that connects with the rope so that there is at least a rope whose stretching direction is not horizontal ,
A surface layer earth and sand having a plate-like main body that allows water to pass through a rope whose stretching direction is not horizontal, and an engaging part that can be attached to the main body at a substantially right angle to the longitudinal direction of the rope. It is characterized by attaching a surface sediment discharge control member capable of blocking the downward movement of the slope.
[0008]
The invention of claim 2, we established a number of anchor slope, fastened this mounting the bearing capacity member to the head of each anchor gives Bearing force against the ground with, and between the anchor head, at least In the slope stabilization method that connects with a rope so that there is a rope that the tensioning direction is not a direction that goes straight from the top to the bottom of the slope,
A slope of surface earth and sand, having a plate-like main body that allows water to pass through the rope that is not in a direction in which the stretching direction is directed straight, and an engagement part that can be attached to the main body substantially parallel to the rope. It is characterized by attaching a surface layer sediment runoff suppressing member capable of blocking the downward movement.
[0009]
Claim 3 is a surface sediment discharge control member for use in the slope stabilization method for suppressing sediment discharge of claim 1, a plate-like main body capable of passing water, and the main body with respect to the longitudinal direction of the rope . And an engaging portion that can be attached at a substantially right angle.
[0010]
According to a fourth aspect of the present invention, in the surface sediment discharge control member according to the third aspect, a notch for inserting a rope is provided in the main body portion as the engaging portion.
[0011]
Claim 5 is a surface layer sediment control member used in the slope stabilization method for preventing sediment discharge of claim 2, and a plate-like main body capable of passing water, and the main body can be attached substantially parallel to the rope. and having a such engaging portion.
[0012]
A sixth aspect of the present invention is the surface sediment discharge control member according to the third, fourth or fifth aspect, wherein a large number of water passage holes are provided in the main body.
[0013]
According to a seventh aspect of the present invention, in the surface layer sediment outflow suppression member according to the fifth aspect, the plate-shaped main body portion has a comb-tooth shape, and a downward groove extending in the horizontal direction as an engaging portion is provided on a side surface of the main body portion. And
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 (a) is a plan view of a slope where a slope stabilization method for suppressing sediment discharge according to an embodiment of the present invention is applied, and (b) is a cross-sectional view taken along the line AA in FIG. As shown in these figures, this slope stabilization method is to install a large number of anchors 1 on the slope, and attach a supporting member 2 to the head of each anchor 1 to fasten it, thereby reducing the supporting pressure on the ground. This is a slope stabilization method in which the heads of the anchors 1 are connected by a rope, for example, a wire rope 3.
[0015]
The detailed structure of the anchor head will be described. As shown in FIG. 2, the bearing member 2 is made of a steel plate, and a cylindrical body 7 is fixed vertically to a bottom plate 6 having an anchor insertion hole at the center. A reinforcing rib 8 provided with a notch 8a for allowing the wire rope 3 to pass therethrough is welded and fixed between the body 7 and the bearing member 2 is arranged on the head of the anchor 1 placed on the ground. The nut 10 is screwed into the threaded portion 1a of the anchor head via the washer plate 9 and tightened to obtain a support pressure to the ground.
In the illustrated example, the wire rope 3 has a triangular shape between three adjacent anchor heads. Specifically, the wire rope 3 is a notch 8 a of the reinforcing rib 8 of the bearing member 2. Through the outer periphery of the cylinder 7.
[0016]
In the present invention, a surface layer sediment outflow suppression member capable of blocking the downward movement of the surface layer soil is attached to the wire rope 3. In FIG. 1 (a), the surface sediment discharge control member of the example is shown by 4 .
The detailed structure of the surface sediment discharge control member will be described. The surface sediment discharge suppression member 4 includes a disk-shaped main body 12 and a central hole 13a and a radius as shown in FIGS. This is a structure in which a keyhole-shaped notch 13 formed of a slit 13b in the direction is provided, a number of water passage holes 14 are formed, and both sides, right and left, and upper part of the slit 13b are reinforced by reinforcing ribs 15.
[0017]
The above-described surface sediment discharge control member 4 is constructed by fitting the wire rope 3 into the notch 13 after the construction of connecting the wire rope 3 between the heads of the anchors 1 is performed on the ground 16 as shown in FIG. By placing or filling the tip, the wire rope 3 can be attached at a right angle to the longitudinal direction .
[0018]
During rain, surface soil such as fallen leaves, twigs and earth and sand flows down the slope together with rainwater, but the surface sediment discharge restraining member 4 attached to the wire rope 3 effectively makes such surface sediment flow down. Can be prevented. In addition, since the water passage hole 14 is formed, the rainwater does not stay by the surface sediment discharge control member 4 but gradually flows below the slope or penetrates into the slope soil, and the rainwater adversely affects the stabilization of the slope. Can be prevented.
[0019]
Although the plate-like main-body part 12 is circular in the surface layer sediment outflow suppression member 4 of the said embodiment, it is not restricted to this, It is arbitrary, such as an ellipse or a quadrilateral other polygon. Further, the reinforcing rib 15 is not necessarily provided. Moreover, the shape of the notch 13 for fitting the wire rope 3 is not limited to the shape of the embodiment, as long as the wire rope 3 can be fitted in a lateral direction perpendicular to the longitudinal direction of the wire rope 3. It is.
Moreover, as a part which attaches a surface sediment discharge control member, not only the wire rope 3 which makes the inclination direction in a slope but the wire rope 3 which makes an oblique direction may be sufficient.
[0020]
FIG. 4 shows a surface sediment discharge suppressing member 5 as a reference example of the present invention . The surface sediment discharge control member 5 includes a plurality of ring-shaped wire rods 19 having gaps 18 in a part of the circumferential direction, and the rings arranged so that the gaps 18 are aligned at intervals. This is a structure composed of a plurality of linear wires 20 in the axial direction connecting the outer peripheral portions of the wire rod 19.
This surface sediment discharge control member 5 can be attached to the wire rope 3 along the longitudinal direction by inserting the wire rope 3 into the gap 18. When the gap 18 is smaller than the diameter of the wire rope 3, the wire rope 3 can be put in by widening the gap.
When the rigidity of the ring-shaped wire 19 to be used is low, the gap passing through the wire rope 3 is a part of the circumferential separation portion as shown in FIG. ), And an actual gap may be generated when expanded.
According to the surface sediment discharge control member 5, since it has a mesh, stagnation of rainwater does not naturally occur. In addition, by appropriately setting the size of the mesh, it is possible to effectively achieve the surface sediment runoff suppression effect.
[0021]
The surface layer sediment runoff suppression member 5 is a so-called short cylindrical wire mesh having a gap 18 in one circumferential direction, but is a square weld in which a vertical wire and a horizontal wire are welded and fixed in a lattice shape. A wire mesh can also be obtained by forming a cylindrical shape leaving a gap. Moreover, it can also manufacture using wire meshes other than a welded wire mesh.
[0022]
Similarly, as a reference example, FIG. 5 shows a modification of the surface sediment discharge suppressing member 5 of FIG. The surface sediment discharge control member 22 uses a substantially ring-shaped wire 24 having a recess 23 in a part in the circumferential direction instead of the substantially ring-shaped wire 19 having the gap 18 in the surface sediment discharge control member 5 of FIG. In other words, a plurality of substantially ring-shaped wires 24 spaced apart are connected by a plurality of linear wires 25 in the axial direction.
In the case of the surface sediment discharge control member 22, the wire rope 3 can be accommodated in the recessed portion 23 positioned above and attached to the wire rope 3 as shown in FIG.
[0023]
Although the surface sediment discharge control member 5 in FIG. 4 is short, as shown in FIG. 6 as a reference example , the surface sediment discharge control member 5 ′ having the same structure and length as the surface sediment discharge control member 5 ′. When is used, the surface sediment discharge control effect is enhanced.
The surface layer sediment outflow suppression member 22 shown in FIG. 5 can be used with a longer length as in FIG.
[0024]
Similarly , as shown in FIG. 7 as a reference example, a plurality of linear wires 29 in the axial direction are welded and fixed to the outer periphery of a spiral wire 28 formed in a spiral shape, and a recess 30 is formed as in FIG. The provided surface sediment discharge control member 31 can also be used. The surface sediment discharge control member 31 is used in the same manner as the surface sediment discharge suppression member 22 of FIG.
Similarly , as shown in FIG. 8 as a reference example, a surface sediment discharge control member 32 made of only a short spiral wire 28 ′ can be used. In this case, if the surface layer sediment outflow suppression member 32 that is a spiral wire is attached to the wire rope 3 and rotated a plurality of times, the wire rope 3 can be passed through the spiral.
[0025]
FIG. 9 shows a surface sediment discharge suppressing member 33 according to still another embodiment of the present invention. FIG. 9 (a) is a front view of the surface sediment discharge control member 33, and FIG. 9 (b) is a cross-sectional view taken along the line EE of (b). The surface layer sediment outflow suppression member 33 includes a plurality of slits 34 and has a comb-like body portion 35 that is rectangular as viewed from the front, and on the side surface of the body portion 35, as an engaging portion to the wire rope 3, A downward groove 36 extending in the horizontal direction is provided. In the illustrated example, a large number of slits 34 are provided in a single rectangular plate, and the slits 34 are folded to form a downward groove 36 simultaneously with the main body 35.
According to the surface sediment discharge control member 33, the comb-shaped slit 34 portion of the main body portion 35 is a good water passage hole. Moreover, since it has the groove-shaped engaging part (downward groove | channel 36) along the wire rope 3, a wire rope can be carried out by simple operation of putting a comb-tooth shaped part on the ground along the wire rope 3, or filling a front-end | tip. 3 can be attached. Moreover, it is easy to make it long along the wire rope 3, and it is easy to make a surface layer sediment outflow suppression function high.
In addition, like the surface sediment discharge control member 33 ′ shown in FIG. 9C, the same function is exhibited even if the angle member is fixed to the main body portion 35 ′ to form the downward groove 36 ′.
[0026]
The above-mentioned surface sediment discharge control member in the present invention is excellent as surface sediment discharge control means on a natural slope as described below. In other words, the slope stabilization method using concrete or mortar for the slope stabilization method or the slope stabilization method for installing the bag filled with greening materials can stop the sediment flow, but it flows down the slope surface. The rain water that stops is also stopped. For this reason, the bag filled with the greening material is corroded, and the seeds of the greening material are rotted. In addition, in concrete and mortar glue frames, when rainwater is stopped and the amount exceeds a certain level, water flows at a stretch, so erosion / collapse of earth and sand is likely to occur. In fact, in a normal glue frame, many phenomena have been confirmed in which the lower part of the glue frame is eroded.
On the other hand, the surface sediment discharge control means in the present invention only attaches a plate-shaped surface sediment discharge suppression member such as a disk or a comb to the wire rope 3, so that a large amount of rainwater flows on the slope surface. As mentioned above, rainwater gradually flows down the slope or permeates into the slope soil while supplementing the fallen leaves, twigs, and earth and sand that flow along with the rainwater. No erosion problems occur.
[0027]
In the present invention, the anchor is not limited to the one that is driven into the ground, but may be installed by a method such as inserting the anchor into a thin hole that has been previously drilled and injecting grout. Further, the supporting member is not limited to the structure of the illustrated example, and any member can be used as long as it can be attached to the head of the anchor and can apply the supporting pressure to the ground when fastened. In addition, the rope connecting the anchor heads is usually a wire rope, but is not limited thereto, and a resin rope or the like can be used. Moreover, the connection method which connects between anchor heads with a rope is not restricted to a method like FIG. 2, A various method is employable. Further, the arrangement of the anchors is not limited to the arrangement as shown in FIG. 1, and is arbitrary, for example, a simple lattice arrangement. In addition, the rope routing pattern in the case of connecting the anchor heads with the rope is routed so as to form a triangle in the embodiment, but is not limited thereto, and can be routed in an arbitrary pattern.
[0028]
【The invention's effect】
According to the present invention, in the slope stabilization method performed using the anchor, the bearing member and the rope, the surface sediment discharge control member capable of blocking the downward movement of the surface sediment is attached to the rope. at the same time when the Ru it is possible to stabilize the slope to leave, to suppress the outflow of surface soil, the plant can be maintained germination friendly environment.
[0029]
In addition, since the water passage hole is provided in the main body, the rainwater flowing on the slope surface can be gradually flowed down the slope or infiltrated into the slope soil without staying, and there is a problem of ground erosion due to the rainwater flow. Does not occur.
[0030]
According to claim 3 or claim 4, the surface sediment discharge control member can be easily manufactured, and the surface sediment discharge suppression member can be easily attached to the rope.
[0031]
According to the fifth aspect, it is easy to give the surface sediment discharge control member to the surface sediment discharge function in a wide range.
[0032]
According to the seventh aspect, the gap portion of the comb teeth of the main body portion becomes a good water passage hole. Moreover, since it has the groove-shaped engaging part along a rope, attachment to a rope is possible by simple operation of inserting a comb-tooth shaped part into the ground along a rope. Moreover, it is easy to lengthen along a rope, and it is easy to make a surface layer sediment outflow suppression function high.
[Brief description of the drawings]
FIG. 1A is a plan view of a slope on which a slope stabilization method for suppressing sediment discharge according to an embodiment of the present invention is applied, and FIG. 1B is a cross-sectional view taken along line AA in FIG.
FIG. 2 is a cross-sectional view showing a detailed structure near one anchor head in FIG.
3A is a front view showing details of the surface sediment discharge control member 4 of the embodiment of the present invention in FIGS. 1 and 2, and FIG. 3B is a sectional view taken along line BB in FIG. .
4 (a) is a front view showing a surface sediment discharge inhibiting member 5 as a reference example of the present invention in FIGS. 1 and 2, FIG. 4 (b) is a cross-sectional view taken along the line CC of FIG. (A), (b) is a figure explaining the modification of the surface layer sediment outflow suppression member.
FIGS. 5A and 5B show still another reference example of the surface sediment discharge control member. FIG. 5A is a front view, and FIG.
FIG. 6 schematically shows still another reference example of the surface sediment discharge control member, where (A) is a front view and (B) is a right side view of (A).
FIG. 7 schematically shows still another reference example of the surface sediment discharge control member, where (A) is a front view and (B) is a right side view of (A).
FIG. 8 schematically shows still another reference example of the surface sediment discharge control member, where (A) is a front view and (B) is a right side view of (A).
FIGS. 9A and 9B show another embodiment of the surface sediment discharge member of the present invention, where FIG. 9A is a front view, FIG. 9B is a sectional view taken along line EE of FIG. 9A, and FIG. It is a modification of the surface layer sediment outflow suppression member of (b).
[Explanation of symbols]
1 Anchor 2 Bearing member 3 Wire rope (rope)
4, 33, 33 ' Surface sediment discharge control member 12, 35, 35' Main body part 13 Notch (engagement part)
13a Center hole 13b Slit 14 Water passage hole 15 Reinforcing rib 34, 34 'Slit 36, 36' Downward groove (engagement part)

Claims (7)

A large number of anchors are installed on the slope, and a support member is attached to the head of each anchor to fasten it to give support pressure to the ground, and at least the tension direction between the anchor heads is not horizontal. In the slope stabilization method that connects with the rope so that the rope exists ,
A surface layer earth and sand having a plate-like main body that allows water to pass through a rope whose stretching direction is not horizontal, and an engaging part that can be attached to the main body at a substantially right angle to the longitudinal direction of the rope. A slope stabilization method for preventing sediment outflow, characterized by attaching a surface sediment runoff suppressing member capable of blocking the downward movement of the slope. With installing a large number of anchor slope, fastened this mounting head to Bearing member of each anchor gives Bearing force against the ground with, and between the anchor head, at least stretched direction from a slant upper In the slope stabilization method that connects with the rope so that there is a rope that does not go straight down below ,
A slope of surface earth and sand, having a plate-like main body that allows water to pass through the rope that is not in a direction in which the stretching direction is directed straight, and an engagement part that can be attached to the main body substantially parallel to the rope A slope stabilization method for preventing sediment outflow characterized by attaching a surface sediment outflow suppression member capable of blocking downward movement. A surface layer sediment outflow suppression member used in the slope stabilization method for preventing sediment outflow according to claim 1, wherein a plate-like main body capable of passing water and the main body can be attached substantially at right angles to the longitudinal direction of the rope. surface sediment discharge suppressing member characterized by having a such engaging portion.   The surface sediment discharge control member according to claim 3, wherein a notch for inserting a rope is provided in the main body as the engaging portion. A surface layer sediment outflow suppression member used in the slope stabilization method for suppressing sediment outflow according to claim 2, comprising a plate-like main body capable of passing water, and an engagement portion capable of attaching the main body to the rope substantially in parallel. Table layer sediment discharge suppressing member further comprising a.   The surface sediment discharge control member according to claim 3, wherein a plurality of water passage holes are provided in the main body.   The surface layer sediment outflow suppression member according to claim 5, wherein the plate-like main body portion has a comb-like shape and a downward groove extending in a horizontal direction is provided as an engaging portion on a side surface of the main body portion.

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