JP2017179765A - Countermeasure structure against collapsed slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a countermeasure structure against a collapsed slope that may be constructed at a lowest cost possible and may promote vegetation growth and prevent erosion.SOLUTION: A plurality of anchor materials 1 is installed on a collapsed slope surface leaving an interval from each other. The slope surface is covered with a sheet 2 having a function to promote vegetation growth on a surface layer and a function to prevent erosion of the surface layer. A longitudinal belt-form slope surface material 3A and a lateral belt-form slope surface material 3B are laid in a grid form over the sheet, the belt-form surface material being formed integrally with a resin such as to leave a net-form gap. Both belt-form slope surface materials are laid such that a head part of the anchor material 1 exposed above ground penetrates through each of gaps at intersections of both belt-form surface materials. A fixing plate 4 is placed over the head part of the anchor material 1 that penetrates both belt-form surface materials, the fixing plate covering an overlapped surface at the intersection between the belt-form slope surface materials. The belt-form slope surface material is fixed on the anchor material 1 such that the belt-form slope surface material is pressed against the slope surface, by pressing the fixing plate 4 with a tightening member fitted on the head part of the anchor material 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a collapse slope countermeasure structure for construction on a slope where collapse has occurred.

As a slope stabilization method, for example, as in Patent Document 1, a mesh-like tensile-strength coating material laid on a slope is pressed and fixed by an elastic force toward the slope with the anchor head loaded on the slope as a reaction point. There is a certain construction method (slope protection device).
Specifically, as shown in FIGS. 9 and 10, a sheet 2 made of a synthetic fiber non-woven fabric is laid on the entire slope 1 to be constructed, and a tensile strength covering material made of a synthetic resin is formed thereon. 3 is also laid on the entire slope 1 to be constructed.
The sheet 2 and the covering material 3 are fixed at the head of the anchor 4 which penetrates them and is driven into the slope. That is, the washer 5, the compression coil spring 6, and the washer 5 are inserted in this order into the head portion of the anchor 4 protruding on the covering material 3, and the nut 7 screwed to the tip is tightened, and the covering material 3 and the sheet 2 below it are tightened. Is fixed to the slope by the compression elastic force of the compression coil spring 6. Further, the surface of the covering material 3 is formed with a soil 8 and a plant 9 is vegetated for greening. In the illustrated example, the covering member 3 is reinforced by arranging the reinforcing member 10 between the anchors.

 The invention of Patent Document 1 is intended for slopes such as rivers, dams, roads, and constructed land, and can prevent surface slopes from loosening, collapse due to frozen soil melting, scouring due to running water, etc., and has good construction efficiency Although the construction method is to be obtained, in particular, since the covering material 3 is pressed and fixed to the slope surface by elasticity, the entire slope surface is always pressed by the tensile strength covering material 3, and the surface layer of the slope surface It is effective in preventing collapse due to loosening and thawing of frozen soil.

Further, as disclosed in Patent Document 2, there is a collapse prevention structure using a banding band in order to prevent a slope that is expected to collapse in cuts, embankments, and the like of mountains, coasts, rivers, and the like.
If this collapse prevention structure is demonstrated using the code | symbol in patent document 2, the string which connects a plurality of the thin bands 5 arrange | positioned in parallel with the space | interval mutually, and these thin bands so that it may have flexibility A banding band 4 having a body 6, wherein a plurality of the string bodies 6 form a string group, and the band group is arranged at intervals along the length direction of the thin band. Use.
In this banding band 4, the narrow band 5 and the thin band are connected by a flexible string 6, so the banding band 4 itself has flexibility in the width direction, and the slope is uneven. In other words, the banding band 4 is sufficiently fitted to the unevenness, and no space is created below the banding band 4.

JP 62-121234 A Japanese Patent No. 4681293

By the way, since the hard ground is exposed on the slope where the surface layer or the deep layer collapse has occurred, the plant is difficult to grow and is not easily restored. Slopes where vegetation is not restored may be weathered and eroded, causing secondary collapse.
Therefore, it is desirable to take stabilization measures including greening on the slope where collapse occurred. However, in that case, it is desirable in terms of cost-effectiveness to take measures with appropriate specifications that are not excessive on the slope.

  Since the slope stabilization method of Patent Document 1 lays the synthetic resin tensile strength coating 3 on the entire slope, the synthetic resin tensile strength coating 3 is not necessarily inexpensive, and can be constructed at low cost. In addition, an effective countermeasure structure is desired as a countermeasure against the collapse slope.

  The banding band 4 used in the method of Patent Document 2 has a complicated structure in which a plurality of thin bands 5 of a plurality of thin bands 5 arranged in parallel at intervals are connected by a large number of string bodies 6 and is expensive. From brazing, it is desirable to have a countermeasure structure that can be constructed at low cost and is effective as a countermeasure for collapsing slopes.

  The present invention has been made based on the above-mentioned background, and it is possible to take slope stabilization measures as inexpensively as possible for collapse slopes that have collapsed, and to promote vegetation and prevent erosion. The purpose is to provide a countermeasure against collapse slope.

The invention of claim 1 that solves the above-mentioned problem is a collapse slope countermeasure structure applied to a slope where collapse has occurred,
An anchor material installed at a distance from the slope, a sheet of fiber fabric that covers the slope and promotes vegetation on the surface layer and functions to prevent surface erosion, and a mesh laid from above the sheet And a strip-shaped slope material formed integrally with resin so as to have a void in the shape of
At the intersection of a plurality of vertical belt-like slope materials extending in the vertical direction of the slope and a plurality of horizontal belt-like slope materials extending in a direction intersecting the vertical belt-like slope material, which is arranged as the belt-like slope material. The head exposed on the ground of the anchor material penetrates, and the vertical and horizontal strip-shaped slope materials are laid,
The head of the anchor material penetrating both the band-shaped slope members has a fixing plate that covers the overlapping surface of the intersecting portions of both band-shaped slope members, and is a fastening member attached to the head of the anchor material. By pressing the fixing plate, both the strip-like sloped materials are in close contact with the slope.

  A second aspect of the present invention is the collapse slope countermeasure structure according to the first aspect, wherein the anchor material is installed in the ground at a depth of 0.5 to 1.5 m.

  According to a third aspect of the present invention, in the anti-collapse slope structure according to the first or second aspect, the vertical belt-shaped slope member and the horizontal belt-shaped slope member are arranged so as to form a quadrangular lattice shape orthogonal to each other. It is characterized by that.

  Claim 4 is the structure for preventing collapse slope according to claim 3, wherein the size of the fixing plate is a quadrilateral wider than the overlapping portion forming the quadrilateral of the two strip-shaped slope members, and the claws are bent at the four corners on the ground side. It is characterized by having.

  According to a fifth aspect of the present invention, in the collapse slope countermeasure structure according to any one of the first to fourth aspects, the width of the horizontal belt-shaped slope member is W × (0. 7 to 0.9) m.

  Claim 6 is the collapse slope countermeasure structure according to claim 1 or 2, wherein the anchor material is arranged in a zigzag pattern, and one vertical belt-shaped slope material and two laterally inclined right and inclined left sides. The strip-shaped sloped surface material is disposed in a manner of intersecting with the anchor material, and the strip-shaped sloped surface material is disposed so as to form a triangle.

  The slope where the collapse slope countermeasure structure according to the present invention is applied to the slope where the collapse has occurred is covered with the sheet, and the sheet has a function to promote vegetation on the surface layer. The slope is green and contributes greatly to the stabilization of the slope.

Vertical and horizontal strip slopes are laid from the top of the sheet, and the crossing points between the two are fixed to the anchor material in such a manner that the slope is pressed by a fixing plate, so the slope is stabilized by the longitudinal and lateral strips. Is planned.
In addition, since the strip-shaped slope material is arranged vertically and horizontally, the inner part of the lattice does not directly press the slope, but when tension is applied to the strip-shaped slope material during the movement of the clot, Because the tension acting on the vicinity of the anchor material or between the anchor materials is considered to bear most of the entire tension, even if it is not a slope material (covering material) covering the entire slope as in Patent Document 1, it is vertically and horizontally If it is a strip-shaped slope face material to be arranged, the effect of suppressing the movement of the clot is obtained. In addition, when actually constructing, check the ground condition and check the stability of the slope.

Further, unlike the case where the slope material is laid on the entire target slope as in Patent Document 1, since the belt-like slope material is arranged vertically and horizontally, the cost of the material used is significantly reduced.
Further, unlike the banding band having a complicated structure in which a plurality of narrow bands arranged in parallel are connected by a large number of string bodies as in Patent Document 2, it is inexpensive because it is a band-shaped face material formed integrally with resin. The construction cost is cheap.

  In addition, since the sheet laid on the entire target slope is pressed by a strip-like slope material arranged vertically and horizontally, by using a material having a certain level of strength as a sheet, erosion of the surface layer is prevented. The function can be performed effectively. Moreover, since the sheet | seat pressed with the strip | belt-shaped slope material of arrangement | positioning vertically and horizontally also fulfill | performs the effect | action which hold | maintains the earth and sand which flowed in, it becomes the ground where a plant grows easily and greening is promoted.

  The present invention is suitable for application to an inclined surface in which an anchor material is installed at a depth of 0.5 to 1.5 m in the ground and the effect of stabilizing the inclined surface can be obtained. It is suitable as a countermeasure for collapse slope against the surface collapse slope where collapse occurred.

The fixing plate having a quadrilateral wider than the overlapping portion forming the quadrangular shape of the vertical and horizontal strip-shaped slope members and having claw portions at the four corners is provided on the outer side of the four corners of the overlapping portion of the strip-shaped slope material. Since it penetrates into the ground so as to penetrate the sheet, it acts to firmly fix the overlapping portion of the strip-shaped slope material to the anchor material and to firmly fix the sheet to the slope.
Further, since the band-shaped slope material is disposed between the claw parts, the band-shaped slope material is not damaged by the claw parts. Therefore, even if a large force is generated when the sheet is placed on the entire slope and the sheet that catches the movement of the clot on the wide part of the slope is pressed with the strip-shaped slope material arranged vertically and horizontally, the strip-like slope is generated. The material can effectively suppress the movement of the clot without being damaged.

  The tension generated in the vertical and horizontal band slopes that suppress the movement of the mass during the movement of the masses is larger in the vertical band slopes and smaller in the horizontal band slopes. By narrowing the width of the face material, it is possible to obtain a collapse slope countermeasure structure with an appropriate specification that is not excessive, and to reduce the construction cost.

It is a top view which shows a part of slope which constructed the collapse slope countermeasure structure of one Example of this invention. It is an AA expanded sectional view of FIG. It is an enlarged view of one anchor material vicinity of FIG. FIG. 2 is an enlarged view of a portion of one fixing plate in FIG. 1. 4A and 4B show a fixing plate in FIG. 4, where (A) is a plan view and (B) is a right side view. It is a principal part enlarged view of the vertical strip-shaped slope material in FIG. (A) is a schematic cross-sectional view of a slope on which the countermeasure structure of the embodiment is constructed, and (B) is a schematic plan view of the same. It is a top view which shows a part of slope which constructed the collapse slope countermeasure structure of the other Example of this invention. It shows a conventional construction method (slope protection device of Patent Document 1), and is a sectional view of a constructed slope. It is a top view of the principal part of the Example at the time of constructing a reinforcing material further on the construction slope of FIG.

  Hereinafter, the form for implementing the collapse slope countermeasure structure of this invention is demonstrated with reference to drawings.

FIG. 1 is a plan view showing a part of a slope where a collapse slope countermeasure structure according to an embodiment of the present invention is constructed, FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG. 1, and FIG. FIG. 4 is an enlarged view and FIG. 4 is a plan view of FIG.
In this embodiment, for example, an inclined surface with a surface layer collapse as schematically shown in FIGS. 7A and 7B is assumed. The portion indicated by the broken line is the portion where the surface layer collapse (collapse) has occurred. Reference numeral 30 denotes a surface layer collapse slope (a collapse occurrence part slope) and a slope on which a surface layer collapse slope countermeasure structure is constructed, and 31 denotes collapsed soil. Reference numeral 1 denotes an anchor material, which will be described later, in the surface layer collapse slope countermeasure structure. In FIG. 7B, the hatched portion is a surface layer collapse occurrence portion. A vertical and horizontal belt-shaped slope material described later is schematically indicated by reference numeral 3.
In the figure, the surface layer collapse occurs on the middle of the slope, but it may occur in the vicinity of the shoulder, on the slope side, or on the entire slope.

  As shown in FIG. 1 to FIG. 4 and FIG. 7, the countermeasure construction method for constructing this surface collapse slope countermeasure structure is to install a plurality of anchor materials 1 at intervals on the surface collapse slope (surface slope where the slope collapse occurs) 30. The belt is covered with a sheet 2 that functions to promote vegetation on the surface layer and to prevent erosion of the surface layer, and a strip-shaped face material that is integrally formed with resin so as to have a mesh-like void from above the sheet 2 A plurality of vertical belt-like slope members 3 (3A) extending in the vertical direction of the slope and a plurality of horizontal belt-like slope members 3 (3B) extending in the direction intersecting with the vertical belt-like slope members 3A. In the state where the heads exposed on the ground of the anchor material 1 pass through the respective voids (mesh voids) described later at the intersections of the two band-shaped sloped materials 3A, 3B at the time of the laying. The strip-shaped slopes 3A and 3B are laid, and both the strip-shaped slopes The fixing member 4 that covers the overlapping surface of the intersecting portions of the two band-shaped slope materials 3A and 3B is placed on the head of the anchor material 1 that has passed through 3A and 3B, and the fastening member 5 attached to the head of the anchor material 1 The fixing plate 4 is pressed to fix the two band-shaped slope materials 3A and 3B to the anchor material 1 in such a manner that the slope is pressed.

More specifically, the anchor material 1 is installed after shaping the portion where the surface layer collapse occurred. As the anchor material 1, a so-called rock bolt, a deformed steel bar, or the like can be used. The anchor material 1 of the embodiment uses a deformed steel bar having a screw node of φ19 mm.
The installation interval M of the anchor material 1 is installed at intervals of, for example, 2 m (meters) both vertically and horizontally.
In the embodiment, the anchoring length L of the anchor material 1 (depth inserted into the ground) is about 1.0 m. However, considering the characteristics of the slope targeted by the collapse slope countermeasure structure of the present invention, the anchoring length L is considered. Is preferably in a range of 0.5 to 1.5 m.
The anchor material 1 perforates the slope and inserts into the perforation hole, and injects a grout material such as cement milk to ensure the bonding force between the anchor material and the hole wall.
In the embodiment, the spacer 7 is attached to a position near the tip of the anchor and the ground surface so that the anchor material 1 is located at the center of the hole and can secure a gap interval with the hole wall.

  Next, the sheet 2 is laid on the entire slope to be constructed. This sheet 2 is laid for the purpose of promoting vegetation of the surface layer and for the purpose of preventing erosion of the surface layer. A so-called commercially available vegetation sheet or mat provided with vegetation seeds can be used.

Next, from above the sheet 2, a plurality of vertical belt-like slope members 3A extending in the vertical direction of the slope and a plurality of horizontal belt-like slope members 3B extending in a direction intersecting with the vertical belt-like slope members Lay in. As shown in FIG. 6 showing the main part, the band-shaped sloped surface material 3 (3A, 3B) is a band-shaped surface material that is integrally formed with a resin so as to have a mesh-like void. Lay it for the purpose of resisting the load with tensile tension and suppressing surface slip.
The belt-shaped sloped surface material 3 of the example is a polyethylene net with aramid fibers having a high tensile tension, and has a mesh size of 50 mm in length and 28 mm in width, and a width W of 260 mm. As the material for the band-shaped sloped face material 3, various synthetic resin-made band-shaped face materials having high tensile tension can be used.
When laying the strip-shaped slope member 3, both strips are formed in such a manner that the heads exposed to the ground of the anchor member 1 that have already been installed penetrate the respective gaps at the intersections of the strip-shaped slope members 3 A, 3 B. Slope members 3A and 3B are laid.

  Subsequently, the head of the anchor material 1 penetrating the both band-shaped slope members 3A, 3B is covered with a fixing plate 4 covering the overlapping surface of the intersecting portions of both band-shaped slope members 3A, 3B, a washer 5 is placed, and a screw The nut (clamping member) 6 screwed into the head of the anchor material 1 which is a deformed steel bar of the knot is pressed to press the fixing plate 4 to press the slopes 3A and 3B on the slopes. It fixes to the anchor material 1 in the aspect.

The fixing plate 4 is a quadrilateral with a thickness t = 6 mm having an anchor material insertion hole 4a at the center, and the vertical and horizontal dimensions A × B are 350 mm × 350 mm. Further, a flange portion 4c is formed by bending the corner portion of the rectangular plate material of the fixed plate 4 to the ground side.
As described above, the fixing plate 4 of the embodiment has a rectangular shape wider than the overlapping portion forming the rectangular shape of the vertical and horizontal strip-shaped sloped materials 3A and 3B having a width of 260 mm, and has claw portions 4c at the four corners.
Moreover, the longitudinal elongate hole 4b is provided in the both sides of the width direction of the fixed plate 4, and conveyance can be made easy by putting a finger and holding an edge part.

  The slope where the above-mentioned countermeasure work was applied to the surface layer collapse slope where the surface layer collapse occurred is covered with the sheet 2 in its entirety, and the sheet 2 has a function to promote vegetation on the surface layer. It grows green and the slope is green, which contributes greatly to the stabilization of the slope.

In addition, the vertical and horizontal strip slopes 3 are laid from the top of the sheet 2, and the crossing points between the two are fixed to the anchor member 1 in such a manner that the inclined plate is pressed by the fixing plate 4. The slope is stabilized by the material 3.
In addition, since the strip-shaped slope material is arranged vertically and horizontally, the portion in the grid does not directly press the slope, but when the tension is applied to the strip-shaped slope material 3 during the movement of the clot, the strip-shaped slope material. 3) The tension acting on the vicinity of the anchor material or between the anchor materials is considered to bear most of the total tension, so even if it is not a slope material (covering material) covering the entire slope as in Patent Document 1, If it is a strip-shaped slope material arranged vertically and horizontally, the effect of suppressing the movement of the clot can be obtained. In addition, when actually constructing, check the ground condition and check the stability of the slope.

Further, unlike the case where the slope material is laid on the entire target slope as in Patent Document 1, the strip-like slope material 3 is arranged vertically and horizontally, so that the cost of the material used is significantly reduced.
Further, unlike the banding band having a complicated structure in which a plurality of narrow bands arranged in parallel are connected by a large number of string bodies as in Patent Document 2, it is inexpensive because it is a band-shaped face material formed integrally with resin. The construction cost is cheap.

  Further, since the sheet 2 laid on the entire target slope is pressed by the strip-shaped slope material 3 arranged vertically and horizontally, by using a material having a certain strength as the sheet, the erosion of the slope is prevented. Effectively prevents the effect. Moreover, since the sheet | seat 2 hold | suppressed by the strip | belt-shaped slope material 3 of a vertical and horizontal arrangement | positioning also fulfill | performs the effect | action which hold | maintains the earth and sand which flowed in, it becomes the ground where a plant grows easily, and greening is accelerated | stimulated.

Further, the fixing plate 4 having a quadrilateral wider than the overlapping portion forming the quadrilateral of the vertical and horizontal strip-shaped slope member 3 and having the claw portions 4c at the four corners is provided on the outer side of the four corners of the overlapping portion of the strip-shaped slope member 3. Can penetrate the sheet 2 and bite into the ground, so that the overlapping portion of the strip-like sloped surface material 4 can be firmly fixed to the anchor material 1, and the positioning of the strip-like sloped surface material 4 and the effect of suppressing twisting can be achieved. And the sheet | seat 2 can be firmly fixed to a slope.
Further, since the strip-shaped slope material 3 is disposed between the claw portions 4c and 4c, the strip-shaped slope material 3 is not damaged by the claw portions 4c. Therefore, even when a large force of the clot is generated when the sheet 2 that is laid on the entire target slope and receives the movement of the clot on the wide part of the slope is pressed by the strip-shaped slope material 3 arranged vertically and horizontally, The slope material 3 can effectively suppress the movement of the soil mass without being damaged.

In the embodiment, the widths of the vertical and horizontal strip slopes are set to the same width, but the width of the horizontal strip slope is set to W × (0.7 to 0. 9) It can be as narrow as about m.
The tension generated in the vertical and horizontal band slopes that suppress the movement of the mass during the movement of the mass is larger in the vertical band slopes and smaller in the horizontal band slopes, so the width of the horizontal band slopes is narrow. By doing so, a collapse slope countermeasure structure with an appropriate specification that is not excessive can be obtained, and the construction cost can be reduced.

FIG. 8 is a plan view showing a part of a slope on which a collapse slope countermeasure structure according to another embodiment of the present invention is constructed. As shown in the figure, the anchor materials 1 are arranged in a staggered manner, and one vertical belt-shaped slope material 3A and two horizontal belt-shaped slope materials 3B ′ inclined rightward and inclined leftward are the anchor material 1 described above. Therefore, the strip-shaped slope members 3 are arranged so as to form a triangle. In the illustrated example, the middle vertical strip-shaped slope member 3A is in one row, but there are a plurality of rows depending on the slope to be constructed.
The shape of the fixing plate is not particularly limited, but in the illustrated example, a horizontally long rectangular fixing plate 4 ₁ , a large vertical rectangular fixing plate 4 ₂ , and a large hexagonal fixing in accordance with the width of the vertical strip-shaped slope. It shows a plate _{4 3.} When the shape to correspond to the contour of the cross section of the strip-like slopes material like a large vertically long rectangular fixing plate 4 ₂ and hexagonal fixed plate 4 ₃ sizes, it provided six corners of the rectangular corners or hexagonal The nail | claw part (4c) can exhibit the positioning of a strip | belt-shaped sloped surface material, and a twist suppression effect effectively.

In the case of the horizontal belt-shaped sloped surface material 3B that is perpendicular to the vertical belt-shaped sloped surface material 3A when a tension is applied to the belt-shaped sloped surface material during movement of the mass, It is possible to bear a larger tension than
Moreover, since the anchor material 1 in one place bears with two of right slanting inclination and slanting left slanting, the effect of suppressing the movement of the clot increases. Further, the inner area (triangular area) surrounded by the strip-shaped slope material 3 passed between the three adjacent anchor members 1 is narrower than the area (square area) of the portion in the lattice in the case of the lattice-like arrangement described above. In this respect, the effect of suppressing the movement of the clot is increased. However, since the amount of material used (the length of the required strip-shaped slope face material) increases, the situation of the slope of the construction target, the necessary soil mass movement suppression effect, the anchor material spacing, and other factors are taken into consideration. Then, it is preferable to select whether to use the diagonal arrangement or the lattice arrangement. However, in the case of the oblique arrangement mode, the inner area surrounded by the band type slope material is more efficient than the grid arrangement mode in terms of the relationship between the required length of the band slope material and the inner area surrounded by the band shape slope material. It can be said that the effect of suppressing the movement of the clot can be increased efficiently.

1 anchor material 2 sheets 3 band slopes member 3A longitudinal strip slopes member 3B next to the strip-like slopes member 3B 'side of the belt-shaped slopes material obliquely inclined 4,4 _{1, 4} 2, _{4 3} fixed plate 4c claw portion 5 Washer 6 Nut 7 Spacer

Claims (6)

A collapse slope countermeasure structure applied to the slope where collapse occurred,
An anchor material installed at a distance from the slope, a sheet of fiber fabric that covers the slope and promotes vegetation on the surface layer and functions to prevent surface erosion, and a mesh laid from above the sheet And a strip-shaped slope material formed integrally with resin so as to have a void in the shape of
At the intersection of a plurality of vertical belt-like slope materials extending in the vertical direction of the slope and a plurality of horizontal belt-like slope materials extending in a direction intersecting the vertical belt-like slope material, which is arranged as the belt-like slope material. The head exposed on the ground of the anchor material penetrates, and the vertical and horizontal strip-shaped slope materials are laid,
The head of the anchor material penetrating both the band-shaped slope members has a fixing plate that covers the overlapping surface of the intersecting portions of both band-shaped slope members, and is a fastening member attached to the head of the anchor material. The collapse slope countermeasure structure characterized by sticking both said strip-shaped slope material to the slope by pressing a fixing plate.   The collapse slope countermeasure structure according to claim 1, wherein the anchor material is installed in the ground at a depth of 0.5 to 1.5 m.   3. The collapsing slope countermeasure structure according to claim 1, wherein the vertical belt-shaped slope material and the horizontal belt-shaped slope material are arranged so as to be orthogonal to each other and form a quadrangular lattice shape.   4. The collapse according to claim 3, wherein the size of the fixing plate is a quadrilateral wider than the overlapping portion forming the quadrilateral of both belt-shaped slope members, and claw portions bent to the ground side are provided at the four corners. Collapse slope countermeasure structure.   5. The width of the horizontal belt-shaped sloped surface material is W × (0.7 to 0.9) m with respect to the width W of the vertical belt-shaped sloped surface material. The collapse slope countermeasure structure according to item 1.   The anchor material is arranged in a staggered manner, and is arranged in a manner in which one vertical belt-shaped slope material and two horizontal belt-shaped slope materials of right slanting slope and left slanting slope intersect in the anchor material, The collapsed slope countermeasure structure according to claim 1 or 2, wherein the strip-shaped slope members are arranged so as to form a triangle.

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