JP2015175118A - Tree planting method of slope land - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently plant a tree on an inclined plane such as a slope face, while realizing to inexpensively prevent a surface layer collapse of not reaching the soil tight-binding effect by an object root system by a simple structure and a process.SOLUTION: A tree planting method plants a tree by spraying a growth base on slope land such as a slope face, and a net-like body is constructed on a surface of the slope land, and an anchor is installed in the slope land of constructing the net-like body, and after fixing the net-like body to the slope land by a plurality of wing-like parts of extending in a radial shape from an upper end part of the anchor, a growth base is sprayed on a part or the whole of the net-like body. When fixing the net-like body to the slope land by the wing-like part of the anchor, a fitting part is arranged between the wing-like part and the slope land, and the net-like body is fitted in the fitting part.

Description

  The present invention relates to a method for reinforcing and stabilizing a surface layer of an inclined land such as a slope, and greening a surface thereof in a plane or non-surface.

When planting slopes, when the slope surface is stable, a spraying greening method is generally used in which netting works are used as the greening foundation works, and vegetation base material spraying, land spraying, etc. are used as vegetation works. A net-like body represented by a rhombus metal net or a synthetic resin net is widely used for netting.
On the other hand, when the slope surface layer is not stable, restraint works such as spray frame work and natural ground reinforcement earth work are used, and restraint works such as ground anchor work are used in a deeper direction.

  However, in actual practice of design and construction, there are still uneasy only with the spraying greening method, but there are many slopes that do not need to be controlled. When the former is adopted for slopes with intermediate stability, it is necessary to allow the risk of surface collapse in the future, while when the latter is adopted, overdesigned The risk of being pointed out must be tolerated.

There are Patent Documents 1 to 4 as examples of performing restraint work using an anchor and a reinforcing body when the slope surface layer is not stable.
Patent Document 1 discloses a slope stabilization method in which a net is provided on a slope, a cylindrical bag is laid in a lattice shape, an intersection is fixed with an anchor, and cement mortar is injected and cured in the cylindrical bag. .
Patent document 2 discloses a construction method using a combination of an anchor, a wire mesh, and a wire rope in a construction method in which a ground reinforcement with a anchor and a continuous fiber reinforced earth work are combined on the slope.
Patent Documents 3 and 4 describe a method in which a method frame is formed by placing a porous frame-like body in a cylindrical shape on a net or a wire net laid on a slope, and a sand substrate is supplied inside the frame to form a method frame. Disclosed is a slope greening stabilization structure in which a pressure receiving plate is fixed by an anchor between frames or at a legal frame intersection.

Japanese Unexamined Patent Publication No. 7-119154 JP 2000-319888 A JP 2008-303671 A JP 2011-089308 A

  However, the suppression work disclosed in Patent Documents 1 to 4 has a complicated structure and process, and many kinds of materials, and the construction cost becomes high. Therefore, it is an excessive measure for an intermediate stability slope. It becomes. On the other hand, slopes with intermediate stability cannot prevent the collapse of the surface layer only by the soil binding effect by the plant root system of the greening plant that does not perform the suppression work at all.

  The present invention provides a slope protection work that is intermediate between spray greening work and control work, thereby realizing surface layer collapse that does not have a soil binding effect due to the plant root system at a low cost with a simple structure and process. At the same time, it aims at greening slopes such as slopes efficiently.

In order to achieve the above object, the present invention provides the following configuration.
An aspect of the present invention is a greening method in which a growth base is sprayed and greened on a slope such as a slope, where a net is laid on the surface of the slope, an anchor is installed on the slope where the mesh is laid, After fixing the mesh body to an inclined ground by a plurality of wing-like parts extending radially from the upper end of the anchor, a growth base is sprayed on a part or the whole of the mesh body.

  In an example of the above aspect, when the mesh body is fixed to an inclined ground by the wing portion of the anchor, a fitting portion is disposed between the wing portion and the inclined ground, and the mesh body is fitted to the fitting portion. It is characterized by.

  In an example of the above aspect, when the plurality of anchors are arranged so as to form a row of the anchors arranged in at least one of a substantially horizontal direction, a substantially vertical direction, and a substantially oblique direction, before the anchor is installed. The reinforcing body is arranged so as to be superimposed on or below a part of the mesh body, and the reinforcing body is disposed in a band-like range having a center line at the position of the row of anchors, and the reinforcement The width of the body is characterized in that it has at least the span length of the wings of the anchor in a direction perpendicular to the row of anchors.

  In one example of the above aspect, a plurality of the anchors are installed so as to form a plurality of rows, and then a first band-shaped range having a center line at the position of each row of the anchors, or the first range. The growth base is sprayed on the mesh body against any of the second ranges other than the width of the first range, and the width of the anchor wings in the direction perpendicular to each row of the anchors It is characterized by having at least.

  In an example of the above aspect, after the plurality of anchors are installed so as to form a plurality of rows, the anchors are positioned on the mesh body with respect to a first band-shaped range having a center line at the position of each row of the anchors. While spraying a curable material and spraying a growth base on the mesh for a second range other than the first range, the width of the first range is the width in the direction perpendicular to each row of the anchors. It has at least the span length of the wing portion of the anchor.

  With the present invention, in the design and construction of slope protection works, there remains anxiety only with spraying greening works, but efficient surface layer stabilization for slopes such as slopes that are not required until restraint work is planned in the future. It is possible to avoid the risk of surface layer collapse and the risk of receiving overdesign.

  Furthermore, if the entire planting is carried out by spraying the growth base on the entire slope, the introduced plants will overgrow and the seeds flying from the surrounding area after construction will be hindered, and the vegetation transition may be stagnant. In the present invention, since the slope can be greened non-surfacely (only in a selective range, not the entire surface), there is no risk of inhibiting the colonization of seeds flying from the periphery, and the effect of promoting the natural recovery of vegetation is achieved. I can expect.

  When the growth base is sprayed non-surfacely, the positioning operation is required. However, in the present invention, the construction of the mechanism for stabilizing the slope also serves as the positioning operation as it is. No work is required.

FIG. 1 is a schematic cross-sectional view showing an example of an embodiment of the present invention. FIG. 2 is a plan view and a side view showing the two types of anchors shown in FIG. 1 and other modifications. FIG. 3 is a schematic cross-sectional view showing another example of the embodiment of the present invention. FIG. 4 is a diagram showing an example of the installation procedure of the anchor shown in FIG. FIG. 5 is a schematic sectional view showing still another example of the embodiment of the present invention. FIG. 6 is a partially enlarged view for illustrating an example of a fitting state between the fitting portion and the mesh body in the anchor of FIG. 5. FIG. 7 is a schematic plan view showing an application example of the present invention to an inclined land. FIG. 8 is a schematic plan view showing another application example of the present invention to an inclined land. FIG. 9 is a diagram showing an example of a growth base spraying method according to the present invention. FIG. 10 is a diagram showing an example of a growth base and a method of spraying a hardening material in the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing an example of an embodiment of the present invention. First, the net-like body 2 is laid on the entire sloped surface 1 such as a slope or a slope to be constructed. As the net 2, for example, a rhombus metal net, a resin net, a wire net, or the like is used. In addition, it is preferable to use a reticulate body 2 having strength as the inclined ground layer becomes unstable. Generally, a rhombus wire mesh is used.

  After installing the mesh body 2, the anchor 3 is installed. The anchor 3 of the present invention has a plurality of wing-like portions 31 extending radially from the upper end portion thereof. In FIG. 1, in order to show two examples of the anchor 3, two types of anchors 3 having different shapes of the wing-shaped portion 31 (hereinafter, reference numerals 3 </ b> A and 3 </ b> B are used to distinguish these anchors, and the shape of the wing-shaped portion is used. Are used when distinguishing between them). Details of the anchor shape will be described later with reference to FIG.

  The material of the anchor 3 and its wing-shaped part 31 is not particularly limited, but generally a steel material such as a reinforcing bar is used. The anchor should have a structure that can increase the peripheral frictional force with the natural ground. In addition to the steel rod with an uneven surface, the surface frictional force can be reduced by using a material with an uneven surface of a hollow steel pipe. Can be increased. Furthermore, it is preferable to use a material with irregularities on the inside of the hollow steel pipe, since the adhesive force of the adhesive can be increased when the anchor is installed using an adhesive such as cement milk.

  By installing the anchor 3, the wing-like part 31 suppresses the movement of the mesh body 2 on the inclined ground surface 1 and presses the mesh body 2 against the inclined ground surface 1. In this way, the mesh body 2 is fixed to the inclined ground surface 1 by the anchor 3.

  As an installation method of the anchor 3, there are methods such as placement by human power and mechanical force, press-fitting, and the like. In addition, a well-known method such as inserting the anchor 3 after digging a hole with a drilling machine or integrating the ground and the anchor 3 using an adhesive such as cement milk as necessary is applied. it can. The latter method is preferred as the expected collapse depth of the inclined surface layer increases. In addition, since the tensile force is generated in the mesh body 2 by the placement of the anchor 3, it is preferable that the anchor 3 is installed so as to match the overlap at the boundary of the plurality of mesh bodies 2.

  After the anchor 3 is installed, the growth base 4 is sprayed on a part or the whole of the mesh body 2. The thickness of the growth base 4 is preferably set such that at least the wing-like portion 31 is hidden. However, the head of the anchor 3 may protrude above the growth base 4. The wing-shaped part 31 is convenient for use as a guide for the thickness of the growth base 4. By spraying at a thickness at least so that the wing-like portion 31 is not visible, a growth base suitable for greening can be easily created. Furthermore, since the wing-like part 31 which is a structure is completely covered with the growth base 4, it is preferable from the viewpoint of scenery. The means for spraying the growth base 4 is not particularly limited, but when the growth base 4 having a thickness is created, an air type vegetation base spraying method is suitable. This completes the revegetation method for slopes.

  The growth base 4 used in the present invention may be a mixture of seeds or a mixture of seeds. When seeds are mixed, planned greening is possible, and when seeds are not mixed, greening with flying seeds is possible.

  FIG. 2 is a plan view and a side view showing the two types of anchors 3A and 3B shown in FIG. 1 and other modifications. Each anchor shown in FIG. 2 has a wing-like portion 31a, 31b attached in advance to and integrated with an upper end portion 33 (including the upper end and the vicinity of the upper end) of a rod-shaped anchor main body portion 32.

  2 (a1), (b1), (c1), and (d1), the wing-like portions 31a and 31b extending radially in the radial direction around the upper end portion 33, that is, radially, are rebar frames formed by forming reinforcing bars into a frame shape. A member is preferred. By making the wing-like part into a frame shape, when the vegetation base material and the hardener are sprayed from above, the wing-like part can be sprayed without being obstructed by the wing-like part. Moreover, when spraying a hardening material, intensity | strength improves by a hardening material entering in a frame and integrating with a wing-like part. The width of the wing-like portions 31a and 31b is preferably larger than the diameter of the anchor main body portion 32 in order to enhance the adhesion to the inclined ground surface 1 such as the growth base 4. The length of the wings 31a and 31b is not particularly limited, but generally the length from the base end (the upper end 33 of the anchor main body 32) to the tip is about 10 cm to 100 cm. In consideration of workability, the effect of stabilizing the inclined surface layer by a reinforcing body, which will be described later, and the spraying of the non-planar growth base 4, approximately 15 cm to 50 cm is preferable.

  The anchor 3A shown in the plan view and the side view in FIGS. 2 (a1) and (a2) has two wing-like portions 31a extending in two directions different by 180 degrees, and each wing-like portion 31a is inclined when it is installed. It has a curvature that becomes concave toward the surface side. As shown in FIG. 1, in the anchor 3A, the tip portion of the wing portion 31a mainly directly presses the mesh body 2 and the inclined ground surface 1, and the entire curved wing portion 31a springs the mesh body 2 and the inclined ground surface 1 together. An effect of elastically pressing by the (spring) is produced. Moreover, since it is curving, this effect can be exhibited even when the inclined ground surface 1 is not flat.

  The anchor 3B whose plan view and side view are shown in FIGS. 2 (b1) and (b2) has two wing-like portions 31b extending linearly in two directions different by 180 degrees. As shown in FIG. 1, in the anchor 3B, the whole wing-like part 31b produces the effect which presses down the mesh body 2 and the inclined ground surface 1 directly.

  An anchor 3A ′ whose plan view and side view are shown in FIGS. 2 (c1) and 2 (c2) is a modification of the anchor 3A, and has a wing-like portion having a concave curvature on the inclined ground surface side extending in four directions every 90 degrees. 31a.

  An anchor 3B 'whose plan view and side view are shown in FIGS. 2 (d1) and 2 (d2) is a modification of the anchor 3B, and has linear wings 31b extending in four directions every 90 degrees.

  Although not shown, the wing-like portion may be formed to extend radially in three directions every 120 degrees and in six directions every 60 degrees, and the number thereof is not particularly limited. As the number of wings increases, the effect of efficiently pressing the meshwork against the slope increases.However, the weight increases as the number of wings increases, so in consideration of workability, it can be two-way, three-way, or four-way. Those are preferred.

  FIG. 3 is a schematic cross-sectional view showing another example of the embodiment of the present invention. The anchor 3 in FIG. 3 is functionally common to the anchor 3 in FIG. 1, but differs in that the wing-like portion 31 and the anchor main body portion 32 are not integrated in advance and are joined by a nut 35. This form is suitable for work when the length of the anchor main body 32 of the anchor 3 is relatively long. In FIG. 3, in order to show two embodiments, the anchor 3C having the curved wing-like portion 31a and the anchor 3D having the straight wing-like portion 31b shown in FIG. 2 are shown. As shown in FIG. 2, the shape of the wing-like portion 31 is not limited to these and can be variously selected. Other configurations in FIG. 3 are the same as those in FIG.

  FIG. 4 is a diagram showing an example of an installation procedure of the anchor 3C shown in FIG. The same applies to the anchor 3D.

  As shown to Fig.4 (a), the anchor main-body part 32 is first installed in a sloping ground. A bolt portion 34 is formed in an appropriate length range from the upper end of the anchor main body portion 32. A through hole 36 is formed in the center of the wing-shaped portion 31a which is a separate member. Next, as shown in FIG.4 (b), the bolt part 34 of the anchor main-body part 32 is penetrated to the through-hole 36 of the wing-like part 31a, and the wing-like part 31a is attached. Then, as shown in FIG.4 (c), the nut 35 is attached to the volt | bolt part 34, and it tightens with appropriate force. Thereby, the wing-like portion 31a is elastically bent and is elastically pressed against the mesh body 2 and the inclined ground surface 1.

FIG. 5 is a schematic sectional view showing still another example of the embodiment of the present invention.
In FIG. 5, when the mesh body 2 is fixed to the inclined ground surface 1 using the anchors 3 </ b> C and 3 </ b> D illustrated in FIG. 3, the fitting portion 5 is disposed between the wing-like portions 31 a and 31 b and the inclined ground surface 1. . The fitting portion 5 can be similarly applied to the anchors 3A and 3B shown in FIG.

  At least a part of the upper end of the fitting part 5 is in contact with the wing-like parts 31 a and 31 b, and the lower end of the fitting part 5 is in contact with the inclined ground surface 1. The fitting part 5 exerts a pressing force on the inclined ground surface 1 by being pressed from the wing-like parts 31a and 31b. The mesh body 2 laid on the inclined ground surface 1 is fitted into the fitting portion 5.

  FIG. 6 is a partially enlarged view for illustrating an example of a fitting state of the fitting portion 5 and the mesh body 2 in the anchor 3 </ b> C of FIG. 5. On the lower end side of the fitting portion 5, a groove, a notch 51 or the like is formed. The wire forming the reticulate body 2 can be fitted into these grooves and notches 51.

  In the case where the inclined ground surface 1 is soft, the fitting portion 5 is more firmly fixed so as to bite into the ground, and the effect of the mesh body 2 covering and fixing the inclined ground surface 1 can be enhanced. The shape of the fitting part 5 will not be specifically limited if it is a shape which fits with the mesh body 2, and although a material is steel materials, for example, it is not limited to this.

  According to the construction method of the present invention shown in FIGS. 1 to 6 above, the mesh body can be pressed by the anchor with the wing-like portion, so that the slope having the possibility of destabilizing the surface layer is efficiently obtained. It becomes possible to hold stably. In the prior art, since the mesh body was only pressed by a general anchor without a wing-like part, when the inclined surface layer moves, there is a sufficient stability effect due to the loss of the connection part between the anchor and the mesh body. It was not obtained. Conventionally, it has been unavoidable that the size of the structure is increased, for example, the use of a frame work is necessary to compensate for these problems. In addition, an excessively large structure was necessary.

FIG. 7 is a schematic plan view showing an application example of the present invention to an inclined land.
By installing the anchors 3 in the substantially horizontal direction (substantially horizontal direction) and in the substantially vertical direction (substantially inclined direction of the inclined land) at appropriate intervals from above the mesh body 2 laid on the surface of the inclined land, the horizontal direction and the approximately A plurality of rows of anchors are formed in the vertical direction.

FIG. 8 is a schematic plan view showing another application example of the present invention to an inclined land.
In this application example, the reinforcing body 6 is placed on top of or below a part of the net-like body 2 laid on the sloped surface. The reinforcing body 6 is arranged in a predetermined range where the anchor 3 is scheduled to be installed before the anchor 3 is installed. For example, a plurality of anchors 3 are arranged in at least one of a substantially horizontal direction, a substantially vertical direction, or a substantially oblique direction (a direction inclined at a predetermined angle with respect to the substantially horizontal direction or the substantially vertical direction). The reinforcing body 6 is arranged in a band-shaped range having the center lines C1, C2, and C3 at the position of the planned row of the anchor 3.

  Further, the width of each reinforcing body 6 in the substantially horizontal direction, the substantially vertical direction, or the substantially oblique direction is set to the length (center) of the expected wing-like portion of the anchor 3 in the direction perpendicular to the center lines C1, C2, and C3. It is preferred to have at least L1, L2, L3) twice the length from the line to the farthest tip of the wing. Since the reinforcing body 6 may sink into the ground when the anchor is installed, it is preferable that the width of the reinforcing body 6 is not designed to be the same as the insertion length of the wing-like part from the beginning, and is designed with a margin in advance. . In this way, ideally, the width of the reinforcing body 6 after the anchor installation can be made substantially the same as the passing length of the wing-like part.

  In FIG. 8, for convenience of explanation, the reinforcing bodies 6 arranged in three directions are shown at the same time. However, the reinforcing bodies 6 may be arranged in only one direction, or arranged in two or three directions in combination. May be. In the case of two directions, for example, a lattice shape combining a substantially vertical direction and a substantially horizontal direction, or a lattice shape combining two substantially oblique directions with different orientations, the anchors are integrated to suppress the natural ground. Therefore, the reinforcing effect of the inclined ground surface 1 can be further enhanced as compared with the case of only one direction. By performing such construction, it is possible to give the tree planting the effect as a natural ground reinforcement earthwork (rebar insertion work).

  The material of the reinforcement body 6 should just be the thing which can exhibit the effect which clamps the inclined ground surface 1 in a strip | belt shape, and is not specifically limited. For example, in order to perform efficient greening, the same material as the mesh body 2 laid on the inclined ground surface 1 can be used, or a geotextile, a wire mesh, an expanded metal, or the like can be used. Further, it is preferable that the reinforcing body 6 has a mesh that can germinate from the growth base 4 or penetrate the root system of a plant that has naturally invaded from the periphery.

  In the conventional technique, since the reinforcing body is pressed with a point anchor, when the surface layer moves, a sufficient effect cannot be obtained due to a loss of a connection portion between the anchor and the reinforcing body. Conventionally, in order to cope with this problem, it has been necessary to reduce the width of the reinforcing body and install a relatively large number of reinforcing bodies. On the other hand, according to the configuration shown in FIG. 8, the reinforcing member 6 can be pressed across the entire surface by the wing-like portion of the anchor of the present invention, so that an inclined land where the surface layer may be destabilized can be obtained. It becomes possible to hold stably efficiently. In addition, since the width of the reinforcing body can be determined according to the range covered by the wing portion of the anchor of the present invention, it is possible to efficiently stabilize an inclined land where the surface layer may be destabilized with fewer anchors than in the past. It becomes possible to hold.

  Next, the example of the growth base spraying method in this invention is demonstrated using FIG.7, FIG8 and FIG.9. In the example of FIG. 7 described above, after the mesh body 2 is fixed by the anchor 3 without using the reinforcing body, the growth base 4 is sprayed onto the mesh body 2. In the example of FIG. 8 described above, the mesh body 2 and the reinforcing body 6 in a predetermined direction are laid, the mesh body 2 and the reinforcing body 6 are fixed with anchors, and then the growth base 4 is placed on the mesh body 2. Spray. In any case, the plurality of anchors 3 are installed so as to form a plurality of rows in a predetermined direction. At this time, in addition to the method of spraying the growth base 4 on the entire surface of the mesh body 2, the following method can be performed.

  The first spraying method is a method in which the growth base 4 is sprayed only on the belt-like first range of nets 2 having the center lines C1, C2, C3 at the positions of the respective rows of the anchors 3. At this time, the width of the first range has at least the insertion lengths L1, L2, and L3 of the wing-like portion of the anchor 3 in the direction perpendicular to each row of the anchor 3. Note that only one direction, or two or three directions may be sprayed in combination. For example, when sprayed substantially in the horizontal direction, the state shown in FIG. However, FIG. 9 is a simplified diagram and shows only the outline of the mesh 2, the anchor 3, and the growth base 4.

  A modification of the first spraying method is shown in FIG. In the case of the first spraying method of FIG. 9A, the net-like body 2 is exposed at a portion where the growth base 4 is not sprayed. In this case, if the mesh body 2 has a large mesh, pebbles and the like may fall out of the mesh and fall. Therefore, in the method of FIG. 9 (a1), before the growth base 4 is sprayed, the mesh 2 that is not sprayed with the growth base 4 (the part without the anchor 3) is finer than the mesh of the net 2 An auxiliary covering 8 such as a net or mat is provided, and then the growth base 4 is sprayed. Thereby, the fall of the pebble etc. from the part without the growth base 4 can be prevented, and safety protection can be aimed at. The auxiliary covering 8 is efficiently and preferably overlapped on the upper surface side of the mesh body 2, but may be on the lower surface side.

  As another modified example, in the portion of the net 2 where the growth base is not sprayed, when it is desired to green the seeds flying from the surroundings, it is possible to use the net with an unevenness as the auxiliary covering 8 to easily catch the seeds. It is preferable to use a three-dimensional net or mat having a predetermined thickness or a net or mat having a pocket structure.

  In contrast to the first spraying method, the second spraying method is a method in which the growth base is sprayed on a band-shaped second range other than the first range. The width of the second range is indicated by reference numerals S1, S2, and S3 in FIGS. Also in this case, spraying may be performed only in one direction, in a combination of two directions or three directions. For example, when sprayed substantially in the horizontal direction, the state shown in FIG. 9B is obtained.

  Also in the second spraying method, although not shown in the drawing, the same as in FIG. 9 (a1) for preventing the fall of pebbles or the like to the net 2 of the portion where the growth base 4 is not sprayed (the portion where the anchor 3 is present). The auxiliary covering 8 may be overlaid on the top. However, as shown in FIG. 8, when the reinforcing body 6 is overlapped with the mesh body 2 where the anchor is provided, a double structure is formed thereby, so that the auxiliary covering body is often unnecessary.

  By applying such a growth base spraying method, the growth base can be easily constructed in a band shape (non-planar) with respect to the inclined surface 1. In general, when spraying a band-shaped growth base, it is necessary to locate the position to be sprayed in a band shape. In the case of the present invention, the anchor row in the example of FIG. 7 and the anchor row in the example of FIG. The reinforcing body is a guide for the spray position as it is.

  Therefore, it is possible to reinforce the inclined ground surface 1 and to perform a positioning operation necessary when spraying the growth base in a band shape (non-surface). That is, according to the present invention, it is possible to greatly enhance the effect as a slope protection work of a construction method for creating a growth base in a strip shape (non-faceted) on the slope. Thereby, it is possible to easily spray a non-planar growth base in a horizontal band shape, a vertical band shape, an oblique band shape, or a lattice shape.

  As a variation of the growth base spraying method, it is possible to spray the growth base 4 non-surfacely only in a range other than the range in which the reinforcing body 6 exists in FIG. For example, the state shown in FIG. This method is effective when it is necessary to continue visual inspection management of the anchor 3 and the reinforcing body 6. In the example of FIG. 8, when the reinforcing body 6 has a network in which at least the root system can be extended, seeds flying from the periphery are likely to settle, and are effective for natural recovery by natural invasion of plants. In particular, it is preferable that the reinforcing body 6 has a mesh structure having a predetermined thickness because the flying seeds can be easily captured in the mesh.

  Finally, the spraying method combining the growth base and the hardening material will be described with reference to FIGS. In this method, the curable material 7 is sprayed on the reticulate body 2 against a band-shaped first range having center lines C1, C2, and C3 at the positions of the respective rows of the anchors 3. And the growth base 4 is sprayed on the mesh body 2 with respect to 2nd ranges other than a 1st range. The width of the first range has at least the span lengths L1, L2, and L3 of the anchor wings in the direction perpendicular to each row of anchors. Note that only one direction, or two or three directions may be sprayed in combination. For example, when sprayed substantially in the horizontal direction, the state shown in FIG. 10 is obtained. FIG. 10 is also a simplified diagram similar to FIG. The thickness of the curable material 7 is preferably set so that at least the wing-like portion of the anchor 3 is hidden.

  As the curable material 7, a known method such as mortar, concrete, or poorly mixed soil cement can be applied. By spraying the hardened material 7 instead of the growth base 4, the stability effect of the inclined land can be further enhanced. In addition, when a mortar spraying work or a concrete spraying work is applied, it is generally necessary to create a thick growth base 4 of about 10 cm in order to green the structure. On the other hand, when a poorly blended soil cement sprayer is applied, depending on the amount of cement, it is basically possible to green the top.

  When mortar is sprayed as the curable material 7, it is not preferable that rebound of mortar adheres to a place other than the target range because it becomes an obstacle to greening. Therefore, when mortar is used, it is preferable to spray the curing material 7 and the growth base 4 by the following procedure. First, after pasting a curing sheet on the target area of the growth base 4, mortar spraying is performed on the target area of the curable material 7. Thereafter, the curing sheet is peeled off and the growth base 4 is sprayed. In this case, in place of the curing sheet, if an uneven net or mat that easily captures seeds is installed, the seeds flying from the periphery can be greened without spraying the growth base 4. .

  In the field of slope protection work, due to the increase in environmental awareness, in addition to securing the traditional slope disaster prevention function, it is becoming necessary to secure the natural environment conservation function. Greening is necessary to exert the natural environment conservation function, but the soil binding effect by the plant root system is limited to the surface layer of the slope. Therefore, in order to prevent surface layer collapse due to weathering of natural ground as a slope protection work, it is necessary to have a function to prevent collapse from a relatively deep position that cannot be compensated by the plant root system.

  The present invention does not require a large-scale structure such as a frame work to prevent slope failure, but enhances the slope disaster prevention function for slopes where the collapse risk cannot be avoided by vegetation alone, and The revegetation work can also be used for the natural environment conservation function, and can be widely used in the fields of slope revegetation and forest reforestation, where both slope disaster prevention and environmental conservation are required.

  Of course, assuming a slip from a deeper position, a ground anchor work as a deterrent can be applied instead of the anchor of the present invention. If this invention is used, it will become possible to use together a ground anchor work and non-surface spraying greening easily.

  Moreover, in recent greening works, in consideration of biodiversity, greening with native species is required instead of exotic pastures that have been frequently used. Since the root system of the present invention can penetrate the reinforcing body, the present invention is not limited to herbaceous plants that have been widely used in the past. There is no. Thereby, it can utilize as a forestation construction method by a woody plant.

  In addition, a method of greening by spraying a growth base on the entire sloped surface, which is a construction target site, has been applied so far. However, if a plant is established on the entire slope by revegetation, the seeds flying from the surrounding area cannot be settled, or even if they are settled, they are covered by the plants growing on the entire surface, and they naturally invade from the surrounding area. Was hindered, and the vegetation transition had a problem.

  In recent years, in consideration of biodiversity, the greening target may be the formation of plant communities rich in natural areas. Since the present invention can spray a non-planar growth base on the sloped surface, which is the construction target site, even if the introduced plant grows densely in the portion where the non-planar growth base is sprayed, the remaining growth The part where the base is not sprayed remains. For this reason, seeds flying from the periphery can be easily settled in this non-sprayed location, and can be used when the vegetation transition is desired to proceed without stagnation.

  In addition to the conventional greening in which exogenous grass seeds are mixed with the growth base, the present invention also uses local seed and seedling workers for natural regeneration by mixing native seeds with the growth base, in the surrounding forest, etc. It can also be used as a topsoil utilization work that mixes the collected topsoil and regenerates naturally from buried seeds, and a natural invasion promoting work that regenerates nature from seeds flying from the surroundings without mixing seeds with the growth base, It can be used as a tree planting method considering biodiversity.

DESCRIPTION OF SYMBOLS 1 Surface of sloping ground 2 Net body 3, 3A, 3B, 3C, 3D Anchor 31 Wing-like part 32 Anchor main-body part 33 Anchor upper end part 34 Bolt part 35 Nut 36 Through-hole 4 Growth base 5 Fitting part 51 Groove or notch 6 Reinforcing body 7 Curing material 8 Auxiliary covering body C1, C2, C3 Center line of strip-shaped range centering on the position of anchor row L1, L2, L3 Intermediary length of wing-shaped body (width of first range)
S1, S2, S3 Width of second range

Claims (5)

It is a revegetation method in which the growth base is sprayed and greened on slopes such as slopes,
A mesh body is installed on the surface of the slope, an anchor is installed on the slope where the mesh is installed, and the mesh body is fixed to the slope by a plurality of wings extending radially from the upper end of the anchor. A greening method for sloped land characterized by spraying a growth base on part or all of When the mesh body is fixed to an inclined ground by the wing-like portion of the anchor, a fitting portion is disposed between the wing-like portion and the sloped ground, and the mesh body is fitted into the fitting portion. Item 1. A greening method for sloped land according to item 1. When installing a plurality of the anchors so as to form a row of the anchors arranged in at least one of a substantially horizontal direction, a substantially vertical direction, or a substantially oblique direction, a part of the mesh-like body before the anchor is installed The reinforcing body is arranged in a band-like range having a center line at the position of the row of anchors, and the width of the reinforcing body is set to be the width of the anchor. The greening method for sloping land according to claim 1, wherein the anchoring wing portion has a span length at least in a direction perpendicular to the row. After the plurality of anchors are installed so as to form a plurality of rows, a first band-shaped range having a center line at the position of each row of the anchors, or a second range other than the first range The growth base is sprayed on the mesh body for any of the above, and the width of the first range has at least the span length of the wing portion of the anchor in a direction perpendicular to each row of the anchor. The revegetation method for slopes according to any one of claims 1 to 3. After setting the plurality of anchors so as to form a plurality of rows, spraying a curing material on the mesh body against the first band-shaped range having a center line at the position of each row of the anchors, and A growth base is sprayed on the mesh body with respect to a second range other than the first range, and the width of the first range is the length of the anchor wings in the direction perpendicular to each row of the anchors. The greening method for sloped land according to any one of claims 1 to 3, wherein the greening method is provided.

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