JP2017186738A - Slope stabilization structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slope stabilization structure that effectively stabilizes a slope surface at a lowest cost possible.SOLUTION: A slope stabilization structure includes an anchor material 1 installed on a slope surface, a sheet 2 for covering a surface layer of the slope surface, a belt-like slope surface material 3 extending in a vertical direction on the slope surface and a belt-like slope surface material 3 extending in a horizontal direction on the slope surface, the belt-like slope surface materials being installed on the sheet, intersecting with each other. A head part of the anchor material exposed above ground penetrates at a location of intersection of the vertical and horizontal belt-like slope surface materials. A top fixing plate 24A and a bottom fixing plate 24B are provided on the head part of the anchor material, the fixing plates being disposed to sandwich from top and bottom an overlapped surface at the location of intersection of the belt-like slope surface materials. The top fixing plate 24A and the bottom fixing plate 24B are pressed on the slope surface while the belt-like slope surface materials are integrally held and fixed with a fastening member 6 fitted on the head part of the anchor material. The overlapped part of the belt-like slope surface materials is held and fixed by the top and bottom fixing plates, thus fixing the overlapped part quite firmly.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a slope countermeasure structure for construction on a slope.

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, in FIG. 20 and FIG. 21, using the reference numerals in Patent Document 2, the sheet 2 made of a synthetic fiber nonwoven fabric is laid on the entire slope 1 of the construction target, and a synthetic resin is formed thereon. A mesh-like tensile-strength coating material 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. In addition, it is desirable to take measures with appropriate specifications that are not excessive as slope stabilization measures, not limited to collapsed slopes.

  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 for slope countermeasures is desired.

  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. It is desirable to have a countermeasure structure that can be constructed inexpensively and that is effective as a countermeasure against slopes.

  The present invention has been made based on the above background, and has a slope countermeasure structure that can take measures for slope stabilization as inexpensively and effectively as possible, and can also promote vegetation and prevent erosion. The purpose is to provide.

The slope countermeasure structure of the invention of claim 1 that solves the above problem is as follows.
It is a slope countermeasure structure where anchor materials are installed with a gap between the slopes,
The anchor material installed on the slope, a sheet covering a surface layer of the slope, and a strip-like slope material laid from the top of the sheet,
The strip-shaped slope material is laid with a plurality of vertical strip-shaped slope surface materials extending in the vertical direction of the slope and a plurality of horizontal strip-shaped slope surface materials extending in a direction intersecting the vertical strip-shaped slope surface material. The head exposed on the ground of the anchor material penetrates at the intersection of the strip-shaped slope material,
At the head of the anchor material penetrating both the band-shaped slope members, there is an upper fixing plate and a lower fixing plate that are arranged so as to sandwich the overlapping surface of the intersecting portions of both band-shaped slope members from above and below. ,
The upper fixing plate and the lower fixing plate are pressed against the slope in a state in which the both band-shaped slope members are clamped and fixed together by a fastening member attached to the head of the anchor material. .

  According to a second aspect of the present invention, in the slope countermeasure structure of the first aspect, a tightening member is attached below the lower fixing plate of the anchor material, and the upper tightening member attached to the head of the anchor material is tightened. The band-shaped sloped material is sandwiched and fixed by narrowing the interval between the upper and lower fixing plates.

  According to a third aspect of the present invention, in the slope countermeasure structure according to the first aspect, the belt-shaped slope is formed by bolting a plurality of locations around the upper fixing plate and the lower fixing plate, and the upper fixing plate and the lower fixing plate. The material is sandwiched and fixed.

  Claim 4 is the slope countermeasure structure according to any one of claims 1 to 3, wherein the width direction of one of the strip-shaped slope members is formed on the lower surface of the upper fixing plate and the upper surface of the lower fixing plate. A pair of bars that are substantially parallel to each other are fixed close to each other so that the bottom bar and the top bar do not overlap each other in plan view, and the upper and lower fixing plates are fastened together. In this case, the strip-shaped sloped material sandwiched between the pair of adjacent bars is stepped and fixed.

  According to a fifth aspect of the present invention, in the slope countermeasure structure according to the fourth aspect, the pair of parallel bars provided on the lower surface of the upper fixing plate and the upper surface of the lower fixing plate are spaced in a direction perpendicular to the longitudinal direction of the bar. It is characterized by being provided in two places with a gap.

  Since the slope of the slope countermeasure structure of the present invention is entirely covered with a sheet, and a sheet having a function of promoting vegetation on the surface layer is used as the sheet, the plant grows over time and the slope is greened. Greatly contributes to the stabilization of

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 member in such a manner that the slope is pressed by a fixing plate, so the slope is stabilized by the strip slopes arranged vertically and horizontally. Is achieved.
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, Since 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 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, 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.

Further, in the present invention, the upper and lower fixing plates are pressed against the inclined surface with the upper and lower fixing plates sandwiched and fixed integrally with the upper and lower fixing plates by the fastening member attached to the head of the anchor material. The crossing of the vertical and horizontal strips is firmly fixed.
If there is no lower fixing plate, simply press the upper fixing plate and press both strips of sloped material against the slope, especially if the ground surface is uneven or the ground is not tightened. The plate and the strip-shaped slope member are not necessarily integrated, and when a tensile load is applied to the strip-shaped slope member, there is a risk of slipping between the upper fixed plate and the strip-shaped slope member. There is a possibility that a concentrated load acts on the contact portion of the strip-shaped sloped surface material with the anchor material, and the strip-shaped sloped surface material is locally broken. However, as described above, both the strip-shaped slope members are sandwiched and fixed integrally by the upper and lower fixing plates, so there is no fear of slipping between the fixed plate and the strip-shaped slope member, and therefore the entire strip-shaped slope member It is possible to bear a tensile load and endure a larger tensile load.

According to the second aspect of the present invention, the peripheral portions of the overlapped upper and lower fixing plates are fastened with bolts and nuts, and the both band-shaped slope members sandwiched between the upper and lower fixing plates are directly sandwiched and fixed. The material is firmly fixed.

  According to the third aspect, the upper and lower fixing plates are fastened by the upper fastening member of the upper fixing plate of the anchor material and the lower fastening member of the lower fixing plate, and the sandwiched both strip-shaped slope members are directly connected. Therefore, both strip-shaped slope members are firmly fixed.

  According to the fourth aspect of the present invention, the sandwiching and fixing of both strip-shaped slope members by the upper fixing plate and the lower fixing plate is performed by using both the strip member on the lower surface of the upper fixing plate and the rod member on the upper surface of the lower fixing plate. Is performed in a stepped state, so that the upper and lower fixing plates and the two strip-shaped slope materials work together without slipping against the tensile load acting on both strip-shaped slope materials, and the two-band method The pinching and fixing to the face material is enhanced, and both band-like slope face materials are more firmly fixed.

  According to the fifth aspect of the present invention, since the pair of parallel bars are provided at two positions spaced apart from each other, the pinching and fixing with respect to both belt-shaped slope members is further enhanced.

It is a top view which shows a part of slope which constructed the slope countermeasure structure of 1st 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. 2, and is a figure which shows the strip | belt-shaped slope material clamping structure by the up-and-down fixing plate in the slope countermeasure structure of an Example. It is an enlarged view of the part of one anchor material in FIG. FIG. 5 shows the upper and lower fixing plates in FIG. 4, (a) is a plan view of the upper fixing plate viewed from the lower surface side, a diagram viewed from the right and a diagram viewed from the front, and (b) is the upper surface of the lower fixing plate. It is the top view seen from the side, the figure seen from the right, and the figure seen from the front. It is a principal part enlarged view of the vertical strip-shaped slope material in FIG. The 2nd Example about the strip shaped slope material clamping structure by an up-and-down fixing plate is shown, (A) is sectional drawing of a strip shaped slope material clamping structure, (B) is a top view of the principal part. The fixing plate used in the third embodiment of the band-shaped sloped material holding structure by the upper and lower fixing plates is shown. (A) is a plan view of the upper fixing plate viewed from the lower surface, a diagram viewed from the right and a front view. FIGS. 2A and 2B are a plan view of the lower fixing plate as viewed from above, a diagram as viewed from the right, and a diagram as viewed from the front. It is sectional drawing explaining the strip | belt-shaped slope material clamping structure using the upper and lower fixing plates of FIG. 8, (A) is the state before clamping and fixing a strip-shaped slope material, (B) shows the state clamped and fixed. . The fixed plate used in 4th Example about the strip-shaped sloped material clamping structure by an up-and-down fixed plate is shown, (A) is the top view which looked at the upper fixed plate from the lower surface side, the figure seen from the right, and the front (B) is a plan view of the lower fixing plate viewed from the upper surface side, a diagram viewed from the right side, and a diagram viewed from the front. FIG. 11 shows a modification of the upper and lower fixing plates in FIG. 10, (A) is a plan view of the upper fixing plate viewed from the lower surface side, a diagram viewed from the right and a diagram viewed from the front, and (B) is the lower fixing plate. They are the top view seen from the upper surface side, the figure seen from the right, and the figure seen from the front. It is sectional drawing explaining the strip | belt-shaped slope material clamping structure using the upper and lower fixing plates of FIG. 10, (A) is the state before clamping and fixing a strip-shaped slope member, (B) shows the state clamped and fixed. . FIG. 9 shows a fifth embodiment of the band-shaped sloped material holding structure by the upper and lower fixing plates, (A) is a sectional view of the banded sloped material holding structure, (B) is a plan view of the main part and its upper fixing plate. It is the figure seen from the figure seen from the right, and the front. FIG. 9 shows a sixth embodiment of the band-shaped sloped material holding structure by the upper and lower fixing plates, (A) is a sectional view of the banded sloped material holding structure, (B) is a plan view of the main part and its upper fixing plate. It is the figure seen from the figure seen from the right, and the front. The fixed plate used in 7th Example about the strip-shaped sloped material clamping structure by an up-and-down fixed plate is shown, (a) is a top view and sectional drawing of an upper fixed plate, (b) is a top view of a lower fixed plate FIG. It is sectional drawing explaining the strip | belt-shaped slope material clamping structure using the upper and lower fixing plates of FIG. 14, (A) is the state before clamping and fixing a strip-shaped slope material, (B) shows the state clamped and fixed. . It is a figure explaining the point which constructs 7th Example, and it constructs in order of (A), (B), (C). The band-shaped method is used when the band-shaped slope is sandwiched and fixed between the upper and lower fixed plates so that it does not slide against the fixed plate, and when the band-shaped slope is slid against the fixed plate without fixing the band-shaped slope. It is a figure explaining the difference in the method of the effect | action of the force to a face material. It is a top view which shows a part of slope which constructed the slope countermeasure structure of the other Example of this invention. (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 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, embodiments for implementing the slope countermeasure structure of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view showing a part of a slope where the slope countermeasure structure of the first embodiment of the present invention is constructed, FIG. 2 is an enlarged cross-sectional view taken along the 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. 19A and 19B 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 collapse slope (a slope where the collapse has occurred) and a slope where a slope countermeasure structure is constructed, and 31 denotes fallen soil. Reference numeral 1 denotes an anchor material to be described later in the slope countermeasure structure. In FIG. 19B, the hatched portion is the 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 FIGS. 1 to 4 and 19, the countermeasure construction method for constructing the slope countermeasure structure of this embodiment is to install a plurality of anchor materials 1 at intervals on the surface collapse slope (surface collapse occurrence part slope) 30. Then, the slope is covered with a sheet 2 that functions to promote vegetation on the surface layer and to prevent erosion of the surface layer. In this embodiment, at this stage, a lower nut (clamping member) 10 to be described later is screwed to each anchor member 1 so that the upper surface is slightly lower than the height position of the ground surface. The fixing plate 4B is passed through the anchor material 1 and placed on the lower nut 10.
Next, a plurality of vertical band-shaped sloped surface materials 3 extending in the vertical direction of the slope, which are band-shaped surface materials that are integrally molded with a resin so as to have a mesh-like gap from above the sheet 2 and the lower fixing plate 4B. (3A) and a plurality of horizontal belt-shaped sloped surface materials 3 (3B) extending in a direction intersecting with the vertical strip-shaped sloped surface material 3A are laid in a lattice shape, and at the time of laying, Both strip-shaped slope members 3A and 3B are laid in such a manner that the heads exposed to the ground of the anchor material 1 pass through respective voids (mesh voids) described later at the intersections.
Next, an upper fixing plate 4A that covers the overlapping surface of the intersecting portions of the two band-shaped sloped surface materials 3A, 3B is placed on the head of the anchor material 1 that has penetrated both the band-shaped sloped surface materials 3A, 3B.
Next, the upper fixing plate 4 is pushed down by tightening with an upper nut (clamping member) 6 attached to the head of the anchor material 1, and the lower fixing plate 4 </ b> B previously passed through the anchor material 1 with this upper fixing plate 4 </ b> A. And sandwiching and fixing the belt-shaped sloped surface materials 3A and 3B. As a result, the intersecting portions of the vertical and horizontal belt-shaped slope members 3A and 3B are sandwiched and fixed by the upper fixing plate 4A and the lower fixing plate 4B and are fixed to the anchor member 1 while being pressed against the slope.

More specifically, in this embodiment, 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, but considering the characteristics of the slope targeted by the slope countermeasure structure of the present invention, the anchoring length L is A range of 0.5 to 1.5 m is preferred.
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.

At this stage, as described above, the lower nut (clamping member) 10 is screwed to each anchor 1 so that the upper surface thereof is slightly below the height position of the ground surface. 4 'is put on the anchor material 1.
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.

  Next, the upper fixing plate 4A covering the overlapping surface of the intersecting portions of the two band-shaped slope materials 3A, 3B is placed on the head of the anchor material 1 penetrating the both band-shaped slope materials 3A, 3B, and the washer 5 is placed. The upper fixing plate 4A, the lower fixing plate 4B, and the upper fixing plate 4A are pushed down by tightening the upper nut (clamping member) 6 screwed into the head of the anchor material 1 which is a deformed steel bar of the screw node. Then, when the belt-shaped sloped surface materials 3A and 3B are sandwiched and fixed, the intersection of the longitudinal and lateral strip-shaped sloped surface materials 3A and 3B is sandwiched and fixed by the upper fixing plate 4A and the lower fixing plate 4B and pressed against the slope. It is fixed to the anchor material 1 in a state.

The upper and lower fixing plates 4A and 4B that sandwich and fix the overlapping portions of the vertical and horizontal belt-shaped sloped surface materials will be described with reference to FIG. 5. The upper fixing plate 4B has a plate thickness t = 6 mm having an anchor material insertion hole 4a at the center. The vertical and horizontal dimensions A × B are 350 mm × 350 mm, and claw portions 4c are formed at the four corners by bending the corner portions to the ground side.
The lower fixing plate 4B also has an anchor material insertion hole 4a and has a plate thickness t = 6 mm and a vertical and horizontal dimension A × B of 350 mm × 350 mm. However, the four corners of the upper fixing plate 4A do not touch the claw portion 4c. The shape is chamfered.
Further, long holes 4b are provided in the vicinity of the upper, lower, left and right edges of the upper and lower fixing plates 4A, 4B, and transportation can be facilitated by putting a finger and grasping the end.

  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, a vertical and horizontal strip-like sloped surface material 3 is laid from above the sheet 2, and the intersection between the two is clamped and fixed by the upper and lower fixing plates 4 </ b> A and 4 </ b> B and is fixed to the anchor material 1 in such a manner that the inclined surface is pressed. Therefore, the slope stabilization is achieved by the strip-shaped slope material 3 arranged vertically and horizontally.
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. Since it is considered that the tension acting on the vicinity of the anchor material 3 or between the anchor materials bears most of the entire tension, 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.
The above-described embodiment has been described as an embodiment assuming a surface collapse slope as shown in FIG. 19, but as described above, the present invention firmly holds the overlapping portions of the vertical and horizontal strip-shaped slope members with upper and lower fixing plates. Therefore, such effects can be applied to slope countermeasures in general to stabilize slopes.

Further, unlike the case where the slope material is laid on the entire target slope as in Patent Document 1, the belt-shaped 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.

The upper fixing plate 4A having a quadrilateral wider than the overlapping portion forming the quadrilateral of the vertical and horizontal strip-shaped slope members 3 and having claw portions 4c at the four corners is formed on the claw portions outside the four corners of the overlapping portion of the strip-shaped slope member 3. Since 4c penetrates into the ground so as to penetrate the sheet 2, the overlapping portion of the strip-shaped sloped surface material 3 can be firmly fixed to the anchor material 1, and the positioning effect of the strip-shaped sloped surface material 3 and the effect of suppressing twisting are illustrated. And the seat 2 can be firmly fixed to the 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 present invention, the upper and lower fixing plates 4A and 4B are not only pressed against the slope with the upper fixing plate, but also fixed with the upper and lower fixing plates 4A and 4B. Since it is pressed against the slope, the vertical and horizontal strip-shaped sloped surface materials 3A and 3B are firmly fixed by the upper and lower fixing plates 4A and 4B. In the following description, the vertical and horizontal strip-shaped slope members 3A and 3B, or both strip-shaped slope members 3A and 3B, may be simply referred to as both strip-shaped slope members 3 or strip-shaped slope members 3.
If there is no lower fixing plate and the upper fixing plate 4 is simply pressed and the strip-like sloped material 3 is pressed against the slope, especially when the ground surface is uneven or the ground is not tightened. In this case, the upper fixing plate 4 and the strip-shaped slope member 3 are not necessarily integrated, and a slip occurs between the upper fixing plate 4 and the strip-shaped slope member 3 when a tensile load is applied to the strip-shaped slope member 3. In this case, as shown in FIG. 17 (a), a concentrated load (indicated by a large white arrow) acts locally on the contact portion of the strip-shaped slope member 3 with the anchor member 1. There is a risk that the strip-shaped slope face material 3 is locally broken. However, as described above, since the strip-shaped slope member 3 is sandwiched and fixed integrally by the upper and lower fixing plates 4A, 4B, there is a fear that slip may occur between the upper and lower fixing plates 4A, 4B and the strip-shaped slope member 3. Therefore, as shown in FIG. 17B, it is possible to bear a distributed tensile load (indicated by small white arrows) over the entire strip-shaped sloped surface material and endure a larger tensile load.

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 slope countermeasure structure with appropriate specifications that is not excessive can be obtained, and construction costs can be reduced.

FIG. 7 shows a second embodiment. In this embodiment, bolts 15 are fixed vertically at a plurality of locations around the lower fixing plate 14B as clamping and fixing means for clamping and fixing both strip-shaped sloped surfaces integrally between the upper fixing plate and the lower fixing plate (for example, The head of the bolt 15 inserted from the lower surface is welded and fixed to the lower fixing plate 14B), and the bolt 15 is inserted into the bolt insertion hole formed corresponding to each bolt 15 of the upper fixing plate 14A. The combined nut 16 is screwed and the belt-shaped sloped surface material 3 is sandwiched and fixed by the upper fixing plate 14A and the lower fixing plate 14B. The upper fixing plate 14A of the embodiment does not have claws at the four corners.
In FIG. 7, although the lower nut 10 in Example 1 is also used together, the lower nut 10 can be omitted.

8 and 9 show a third embodiment. In Example 1 (FIG. 3) and Example 2 (FIG. 7 (a)), the belt-shaped sloped surface material 3 is sandwiched and fixed between the flat surfaces of the upper and lower fixing plates. In this example, the upper and lower fixing plates are fixed. As a clamping / fixing enhancement means for further securing the clamping of the band-shaped sloped surface material by the upper surface of the upper fixing plate 24A and the upper surface of the lower fixing plate 24B, they are close to each other in a manner that they do not overlap each other and either vertically or horizontally A pair of bars 25A and 25B which are parallel to each other in the width direction of one of the strip-shaped slope members 3 are fixed at two positions spaced in a direction perpendicular to the longitudinal direction of the bars.
In the embodiment, both bars 25A and 25B are symmetrical such that the bar 25B on the lower fixing plate 24B side is inside (fixing plate center side) and the bar 25A on the upper fixing plate 24A side is outside (fixing plate outer edge side). It is fixed in a typical arrangement. The bar material of an Example is a round steel, and is being welded and fixed to the fixed plate. The upper fixing plate 14 of this embodiment has no claw at the four corners.
FIG. 9 (a) shows a state before the upper nut 6 is tightened. When the upper nut 6 is tightened, the two strip-shaped slope members 3 are clamped and fixed by the upper and lower fixing plates 24A and 24B as shown in FIG. 9 (b). Is done. In this case, on both sides of the anchor material 1, the two strip-shaped slope members 3 sandwiched between a pair of adjacent bars 25 </ b> A and 25 </ b> B are stepped, so that the tensile load acting on both the strip-shaped slope members 3. On the other hand, the upper and lower fixing plates 24A, 24B and the two strip-shaped slope members 3 are completely integrated without slipping to each other, and the clamping and fixing to both the strip-shaped slope members 3 is enhanced. Is more firmly fixed.
In addition, since the two pairs of parallel bars 25A and 25B are symmetrically arranged with one side being the outer edge side and the other being the center side, it is possible to hold and fix the belt-like sloped material 3 without difficulty. Is done.
In this embodiment, the upper and lower fixing plates 24A and 24B are provided with a pair of bars 25A and 25B which are close and parallel to each other in two places. The effect of preventing slippage with respect to the tensile load acting on the material 3 can be obtained.

10 and 11 show a fourth embodiment. In Example 3 (FIGS. 8 and 9), a pair of bars 25A and 25B parallel to each other in the width direction of either one of the strip-shaped slope members 3 are spaced apart from each other on the upper and lower fixing plates. In this embodiment, as shown in FIG. 10, two bars that form the width direction (vertical direction in FIG. 10) of one strip-shaped slope member on the lower surface side of the upper fixing plate 34A. 35A and four bars 35A, 36A of two bars 36A forming the width direction of the other strip-shaped sloped surface material (left and right in FIG. 10) are provided in a square arrangement, and the lower fixing plate Two short bars 35B forming the width direction (up and down direction in FIG. 10) of one strip-shaped slope member on the upper surface side of 34B and the width direction (left and right direction in FIG. 10) of the other strip-shaped slope member are formed. The four bars 35B and 36B of the two short bars 36B are made of a square on the upper fixing plate 34A side. Is provided so that the arrangement of the small square.
FIG. 11 (a) shows a state before the upper nut 6 is tightened. When the upper nut 6 is tightened, both strip-shaped slope members 3 are clamped and fixed by the upper and lower fixing plates 34A and 34B as shown in FIG. 11 (b). Is done. In this case, in the four directions surrounding the anchor member 1, the two strip-shaped slope members 3 sandwiched between a pair of adjacent rod members 35A, 35B, and 36A, 36B are stepped, so that in either the vertical or horizontal direction, Also for the strip-shaped slope member, the upper and lower fixing plates 34A, 34B and both strip-shaped slope members 3 act completely integrated without sliding against the tensile load acting on the strip-shaped slope member 3, The clamping and fixing to both the strip-shaped slope members 3 is enhanced, and both the strip-shaped slope members 3 are more firmly fixed.

FIG. 10A shows an upper fixing plate 34A ′ and a lower fixing plate 34B ′ used in the fourth embodiment (FIGS. 10 and 11) instead of the upper fixing plate 34A and the lower fixing plate 34B used in the embodiment. .
The upper fixing plate 34A is formed by providing bars 35A and 36A of the same size as the bars 35A and 36A in the upper fixing plate 34A of FIG. 10A on the lower surface of the upper fixing plate 4 of FIG. Equivalent to. Others are the same as those of FIG. 5A, and have claw portions 4c at the four corners.
The lower fixing plate 34B ′ has a claw portion and is a quadrangular outline having vertical and horizontal dimensions A ′ and B ′ (A ′ = B ′) smaller than the vertical and horizontal dimensions A and B (A = B) of the upper fixing plate 34A ′. However, rods 35B and 36B having the same size as the rods 35B and 36B in the lower fixing plate 34B of FIG. 10B are provided.

FIG. 12 shows a fifth embodiment. In this embodiment, the cross-sectional shape of the upper fixing plate 44A is a recess 44A 'that forms a hat-shaped cross-section when viewed from the width direction of either the slope longitudinal direction or the lateral direction of the slope, and the cross section of the lower fixing plate 44B. The recess 44B ′ of the upper fixing plate 44A is a lower fixing plate as a recess 44B ′ having a hat-shaped cross section smaller than the hat-shaped cross section of the upper fixing plate 44A when viewed from the width direction of any band-shaped slope. Both strip-shaped sloped surface materials 3 are sandwiched in a manner covering the recess 44B ′ of 44B.
In this embodiment, since the strip-shaped slope member 3 is sandwiched between the depressions 44A ′ and 44B ′ of the upper and lower fixing plates 44A and 44B, the tensile load acting on any of the strip-shaped slope members in the vertical and lateral directions of the slope On the other hand, there is no possibility of slipping between the upper and lower fixing plates 44A, 44B and the strip-shaped slope member 3, and the entire strip-shaped slope member can bear a tensile load.
In FIG. 12, although the lower nut 10 in Example 1 is also used together, the lower nut 10 can be omitted.

FIG. 13 shows a sixth embodiment. In this embodiment, the cross-sectional shape of the upper fixing plate 54A is a concave groove 54A ′ having a hat-shaped cross section when viewed from the width direction of either the slope longitudinal direction or the lateral direction of the slope, and the lower fixing plate 54B. The concave groove portion 54A ′ of the upper fixing plate 54A is the concave groove portion 54B ′ of the lower fixing plate 54B as the concave groove 54B ′ having a hat-shaped cross section that is smaller than the hat-shaped cross section of the upper fixing plate 54A when viewed in the same direction as above. The strip-shaped sloped surface material 3 is sandwiched in a manner covering the surface.
As in this embodiment, the configuration in which the cross-sectional shapes of the upper and lower fixing plates 54A and 54B form the concave grooves 54A ′ and 54B ′ having a hat-shaped cross section that fits in a small size when viewed from the width direction of one band-shaped sloped surface material is The sliding with the fixing plate can be effectively prevented with respect to the tensile load acting on one of the band-shaped sloped surfaces, and the entire band-shaped sloped material can bear the tensile load.
In FIG. 13, although the lower nut 10 in Example 1 is also used together, the lower nut 10 can be omitted.

14 to 16 show a seventh embodiment. In this embodiment, an upper fixing plate 55A shown in FIG. 14 (a) and a lower fixing plate 55B shown in FIG. 14 (b) are used.
The upper fixing plate 55A has only an anchor material insertion hole at the center, while the lower fixing plate 55B has, for example, an elongated belt-shaped slope material insertion hole 55Ba that passes, for example, the lateral belt-shaped slope material 3B along the left and right sides. , 55Ba, and elongate strip-shaped sloped surface material insertion holes 55Bb and 55Bb for passing, for example, the longitudinal strip-shaped sloped surface material 3A along the top and bottom sides.
FIG. 15 is a cross-sectional view for explaining a belt-shaped sloped material sandwiching structure using the upper and lower fixing plates 55A and 55B. FIG. 15A shows a state before the belt-shaped sloped material 3A and 3B are sandwiched and fixed. (B) shows a state in which both belt-shaped slope members 3A and 3B are sandwiched and fixed.
As shown in FIG. 16 (a), for example, the horizontal strip-shaped sloped surface material 3B and the left and right strip-shaped sloped surface material insertion holes 55Ba, 55Ba of the lower fixing plate 55B are placed from the bottom to the top. Further, the strip-shaped sloped surface material 3B is placed on the upper surface of the lower fixing plate 55B between the two strip-shaped sloped surface material insertion holes 55Ba and 55Ba so as to be inserted from top to bottom.
Then, as shown in FIG. 16 (b), the vertical strip-shaped slope member 3A is formed on the upper surface of the lower fixing plate 55B between the upper and lower strip-shaped slope member insertion holes 55Bb and 55Bb by the same operation. It is made to mount on the strip-shaped slope material 3B.
Next, the upper fixing plate 55A is placed as shown in FIG. This stage is the state shown in FIG.
Next, when the upper nut 6 screwed into the head portion of the anchor material 1 is tightened, as shown in FIG. 15 (b), the two strip-shaped sloped surface materials 3A and 3B are moved up and down and left and right of the upper and lower fixing plates 55A and 55B. Are sandwiched and fixed by the upper and lower fixing plates 55A and 55B in the range inside the band-shaped sloped surface material insertion holes 55Ba and 55Bb.
According to the band-shaped sloped surface material sandwiching structure of this embodiment, both the band-shaped sloped surface materials 3A, 3B are sandwiched and fixed extremely firmly without sliding against both the fixing plates 55A, 55B, and are firmly coupled to the anchor material 1. The

FIG. 18 is a plan view showing a part of a slope on which a slope countermeasure structure of still 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. The portions indicated as the fixing plates 4 ₁ , 4 ₂ , 4 ₃ include both the upper fixing plate and the lower fixing plate.

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.

DESCRIPTION OF SYMBOLS 1 Anchor material 2 Sheet | seat 3 Strip | belt-shaped sloped surface material 3A Vertical strip | belt-shaped sloped surface material 3B Horizontal strip | belt-shaped sloped surface material 3B 'Horizontally slanted strip-shaped sloped surface material 4A, 14A, 24A, 34A, 44A, 54A, 55A Upper fixing Plates 4B, 14B, 24B, 34B, 44B, 54B, 55B Lower fixing plates 4 ₁ , 4 ₂ , 4 ₃ fixing plates (upper and lower fixing plates are shown)
4a Anchor material insertion hole 4b Long hole 4c Claw part 5 Washer 6 Upper nut (tightening member)
7 Spacer 10 Lower nut (tightening member)
15 Bolt 16 Nut 25A, 35A, 36A Bar material 25B, 35B, 36B (on the lower fixing plate side) Bar material 44A '(on the upper fixing plate 44A) Recess 44B' (on the lower fixing plate 44B) ) Indentation 54A 'Concave groove 54B' (in upper fixing plate 54A) Concave groove 55Ba, 55Bb (in lower fixing plate 54B)

Claims (5)

It is a slope countermeasure structure where anchor materials are installed with a gap between the slopes,
The anchor material installed on the slope, a sheet covering a surface layer of the slope, and a strip-like slope material laid from the top of the sheet,
The strip-shaped slope material is laid with a plurality of vertical strip-shaped slope surface materials extending in the vertical direction of the slope and a plurality of horizontal strip-shaped slope surface materials extending in a direction intersecting the vertical strip-shaped slope surface material. The head exposed on the ground of the anchor material penetrates at the intersection of the strip-shaped slope material,
At the head of the anchor material penetrating both the band-shaped slope members, there is an upper fixing plate and a lower fixing plate that are arranged so as to sandwich the overlapping surface of the intersecting portions of both band-shaped slope members from above and below. ,
The upper fixing plate and the lower fixing plate are pressed against the slope in a state in which the both band-shaped slope members are clamped and fixed together by a fastening member attached to the head of the anchor material. Slope countermeasure structure. A fastening member is attached to the lower side of the lower fixing plate of the anchor material, and the upper fastening member attached to the head of the anchor material is tightened, and the interval between the upper and lower fixing plates is narrowed. The slope countermeasure structure according to claim 1, wherein the face material is clamped and fixed. The belt-shaped sloped material is clamped and fixed between the upper fixing plate and the lower fixing plate by bolting a plurality of locations around the upper fixing plate and the lower fixing plate. 1. Slope countermeasure structure described in 1. On the lower surface of the upper fixing plate and the upper surface of the lower fixing plate, a pair of bars that are parallel to each other in the width direction of one of the strip-shaped slope members is a bar on the lower surface side in plan view. When the upper and lower fixing plates are fastened to each other, a band-shaped slope face material sandwiched between the adjacent pair of rods is fixed. The slope countermeasure structure according to any one of claims 1 to 3, wherein the slope countermeasure structure is stepped and fixed. The pair of parallel bars provided on the lower surface of the upper fixing plate and the upper surface of the lower fixing plate, respectively, are provided at two locations spaced in a direction perpendicular to the longitudinal direction of the bar. The slope countermeasure structure according to claim 4.

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