Slope erosion prevention net, and slope erosion prevention method

Abstract

To provide a slope erosion prevention net that is easy to install, and a slope erosion prevention method.SOLUTION: A slope erosion prevention net 1 is made of a net fabric used by being stretched across a slope 2, wherein a resistor 3 that covers meshes 1A of the slope erosion prevention net 1 and decelerates a flow of fluids such as rainwater and overflow water is attached to the net fabric.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a net for preventing slope erosion and a method for preventing slope erosion, and particularly to a net for preventing slope erosion that is easy to install and a method for preventing slope erosion.

Background Art

[0002] As a structure for preventing slope erosion, there is a dike break protection structure for preventing erosion of the back slope (7) due to overtopping water that exceeds the top edge (3) of the dike (1). A dike break protection sheet (100) is partitioned and formed by a plurality of small chambers (23) in which the periphery of a strip-shaped double sheet is sealed and the inside is mutually communicated. One end in the longitudinal direction is fixed to the top edge (3), and the other end side in the longitudinal direction is arranged along the back slope (7). There is one in which water is filled in the small chambers (23) of this dike break protection sheet (100) (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above dike break protection structure, it is necessary to pump up the water outside the dike of the dike (1) and inject water into the small chambers (23) of the dike break protection sheet (100), and there is a problem that the installation is not easy.

[0005] An object of the present invention is to provide a net for preventing slope erosion and a method for preventing slope erosion that are made in consideration of the above circumstances.

Means for Solving the Problems

[0006] The slope erosion prevention net according to claim 1 is a slope erosion prevention net made of a mesh fabric to be stretched on a slope, and a resistor that covers the meshes of the slope erosion prevention net and decelerates the flow of fluids such as rainwater and overflow water is attached to the mesh fabric.

[0007] Further, the slope erosion prevention net according to claim 2 is the slope erosion prevention net according to claim 1, wherein the resistor is provided with a plurality of longitudinal-shaped members that cross a plurality of meshes of the slope erosion prevention net and are long in the longitudinal direction.

[0008] Further, the slope erosion prevention net according to claim 3 is the slope erosion prevention net according to claim 1, wherein the resistor is provided with overhanging pieces on the mesh legs that form the meshes of the slope erosion prevention net at a plurality of meshes of the slope erosion prevention net.

[0009] Further, the slope erosion prevention net according to claim 4 is the slope erosion prevention net according to claim 1, wherein the resistor is provided with a plurality of annular nets made of mesh fabric.

[0010] Further, the slope erosion prevention net according to claim 5 is the slope erosion prevention net according to any one of claims 1 to 4, wherein the slope erosion prevention net has an inclusion between the mesh fabric to which the resistor is attached and the contact mesh fabric that contacts the slope.

[0011] Further, the slope erosion prevention method according to claim 6 is a slope erosion prevention method in which a slope erosion prevention net made of a mesh fabric is stretched on a slope, and the slope erosion prevention net in which a resistor that covers the meshes of the slope erosion prevention net and decelerates the flow of fluids such as rainwater and overflow water is attached to the mesh fabric is stretched on the slope, and the resistor crosses a plurality of meshes of the slope erosion prevention net and is provided with a plurality of longitudinal-shaped members that are long in the longitudinal direction, or overhanging pieces are provided on the mesh legs that form the meshes of the slope erosion prevention net at a plurality of meshes of the slope erosion prevention net, or a plurality of annular nets made of the mesh fabric are provided.

Advantages of the Invention

[0012] According to the slope erosion prevention net described in claim 1, it is a slope erosion prevention net made of a mesh fabric used by stretching it on a slope, and a resistor that covers the eyes of the slope erosion prevention net and decelerates the flow of rainwater is attached to the mesh fabric. Therefore, unlike the conventional method, there is no need to fill water into a small room of a dike break protection sheet, etc. Accordingly, the installation is easier, erosion of the slope by fluids such as rainwater and overflow water can be prevented, and even after the installation of the slope erosion prevention net, since the growth of plants is not hindered through the mesh of the slope erosion prevention net, the roots of the plants get entangled in the mesh and are thus fixed more firmly to the slope.

[0013] Further, according to the slope erosion prevention net described in claim 2, in addition to the effects of the invention described in claim 1 above, since the resistor crosses a plurality of eyes of the slope erosion prevention net and a plurality of longitudinal-shaped members that are long in the longitudinal direction are provided, the slope erosion prevention net having the resistor can be easily attached to the slope.

[0014] Further, according to the slope erosion prevention net described in claim 3, in addition to the effects of the invention described in claim 1 above, since the resistor is provided with overhanging pieces on the mesh legs that constitute the eyes of the slope erosion prevention net at a plurality of eyes of the slope erosion prevention net, the slope erosion prevention net having the resistor can be easily attached to the slope.

[0015] Further, according to the slope erosion prevention net described in claim 4, in addition to the effects of the invention described in claim 1 above, since a plurality of annular nets made of mesh fabric are provided, the slope erosion prevention net having the resistor can be easily attached to the slope.

[0016] Further, according to the slope erosion prevention net described in claim 5, in addition to the effects of the invention described in any one of claims 1 to 4 above, by covering the slope with a plurality of layers overlapping with the slope erosion prevention net, the water resistance of the embankment body is improved against fluids such as rainwater and overflow water on the slope, and erosion due to the flow velocity in the vicinity of the slope and loosening of the slope due to infiltration are prevented.

[0017] Also, according to the slope erosion prevention method described in claim 6, the slope erosion prevention net for covering the mesh of the slope erosion prevention net and attaching a resistor for decelerating the flow of fluids such as rainwater and overflow water to the mesh is installed on the slope. Therefore, unlike the conventional method, there is no need for operations such as filling water into the small rooms of the dike break protection sheet, and thus the installation is easier. It can prevent the erosion of the slope by fluids such as rainwater and overflow water. Also, even after the installation of the slope erosion prevention net, it does not prevent the growth of plants through the mesh of the slope erosion prevention net. Therefore, the roots of the plants are entangled in the mesh and are more firmly fixed to the slope.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 9

DETAILED DESCRIPTION OF THE INVENTION

[0019] A slope erosion prevention net and a slope erosion prevention method according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9.

[0020] Reference numeral 1 shown in FIG. 1 is a slope erosion prevention net made of a mesh fabric used by being stretched on a slope 2. The slope erosion prevention net 1 is formed of a synthetic resin mesh fabric and is fixed to the slope 2 with an anchor (not shown). Note that the slope 2 of the present invention can be applied to those formed by natural topography, those formed by cutting and filling due to construction, etc. Reference numeral 3 is a resistor that covers the mesh 1A of the slope erosion prevention net 1 and decelerates the flow of fluids such as rainwater and overflow water. The resistor 3 is formed of synthetic resin and is attached to the mesh fabric of the slope erosion prevention net 1. Note that X shown in FIG. 1 indicates overflow water that crosses the slope 2. Further, reference numeral 4 indicates a revetment work.

[0021] Therefore, according to the above-described slope erosion prevention net 1, the slope erosion prevention net 1 is made of a mesh fabric used by being stretched on the slope 2, and a resistor 3 that covers the mesh 1A of the slope erosion prevention net 1 and decelerates the flow of rainwater is attached to the mesh fabric. Thus, there is no need for an operation such as filling water into a small room of a levee break protection sheet as in the prior art, and the installation is easier accordingly. It prevents rainwater from directly hitting the slope 2 and serves as a resistance to fluids such as rainwater and overflow water along the slope 2, decelerating the flow of the fluids such as overflow water and rainwater, and preventing erosion of the slope 2 by the fluids such as overflow water and rainwater.

[0022] Specifically explaining the resistor 3, as shown in FIGS. 2, 3, and 4, the resistor 3 has a plurality of longitudinal-shaped members 31 that cross a plurality of meshes 1A of the slope erosion prevention net 1 and are long in the longitudinal direction. The longitudinal-shaped member 31 of the resistor 3 is attached to the wire mesh legs 1X (the four threads that form the four sides of each square when knitting a square mesh). Since the resistor 3 of the longitudinal-shaped member 31 traverses a plurality of meshes 1A of the slope erosion prevention net 1 and a plurality of longitudinal-shaped members 31 that are long in the longitudinal direction are provided, the slope erosion prevention net 1 having the resistor 3 can be easily attached to the slope 2.

[0023] Also, the resistor 3 is not limited to those described in FIGS. 1 to 4 above, and those described in FIGS. 5 and 6 may also be used. That is, the resistor 3 is provided with a plurality of annular nets 32 made of a mesh fabric. In this embodiment, the annular nets 32 are arranged side by side with respect to the slope erosion prevention net 1. Since the resistor 3 of the annular net 32 is provided with a plurality of annular nets 32 made of a mesh fabric, the slope erosion prevention net 1 having the resistor 3 can be easily attached to the slope.

[0024] Also, the resistor 3 is not limited to those described in FIGS. 5 and 6 above, and those described in FIGS. 7 and 8 may also be used. That is, the resistor 3 is provided with protruding pieces 33 on the wire mesh legs 1X that form the meshes 1A of the slope erosion prevention net 1 at a plurality of meshes (preferably, for each of the plurality of meshes) of the slope erosion prevention net 1. Since the resistor 3 of the protruding piece 33 is provided with the protruding piece 33 on the wire mesh legs 1X that form the meshes 1A of the slope erosion prevention net 1 for each of the plurality of meshes 1A of the slope erosion prevention net 1, the slope erosion prevention net 1 having the resistor 3 can be easily attached to the slope 2.

[0025] Note that stretching the slope erosion prevention net 1 made of the above-described mesh fabric on the slope 2 also serves as a method for preventing slope erosion. That is, in the method for preventing slope erosion by stretching the slope erosion prevention net 1 made of a mesh fabric on the slope 2, the resistor 3 that covers the meshes 1A of the slope erosion prevention net 1 and decelerates the flow of fluids such as rainwater and overflow water is attached to the mesh fabric, and the slope erosion prevention net 1 is stretched on the slope 2.

[0026] The resistor 3 either has a plurality of longitudinally long longitudinal-shaped members 31 that cross a plurality of meshes 1A of the slope erosion prevention net 1 shown in FIGS. 1 to 4, or, as shown in FIGS. 5 and 6, has a plurality of annular nets 32 made of the above-mentioned net fabric, or, as shown in FIGS. 7 and 8, has overhanging pieces 33 provided on the net legs 1X that constitute the meshes 1A of the slope erosion prevention net 1 in a plurality of meshes 1A of the slope erosion prevention net 1.

[0027] According to this slope erosion prevention method, since the slope erosion prevention net 1 with the resistor 3 that covers the meshes 1A of the slope erosion prevention net 1 and decelerates the flow of rainwater is stretched on the slope 2, there is no need for operations such as filling water into small rooms of the dike break protection sheet as in the prior art. Accordingly, the installation is easier, the rainwater hitting the slope 2 directly is prevented, and at the same time, it becomes a resistance to fluids such as rainwater and overflow water along the slope 2, decelerates the flow of fluids such as rainwater and overflow water, and can prevent the slope from being eroded by fluids such as rainwater and overflow water.

[0028] Note that the resistor 3 shown in FIGS. 2, 5, and 7 bends according to the flow velocity of fluids such as overflow water and rainwater to form a covering body (a state where the resistor 3 covers the slope erosion prevention net 1), and has a function of improving water resistance. In particular, the resistor 3 of the orthogonal annular net shown in FIGS. 5 and 6 resists the flow, and not only can the water resistance be improved, but also a flow velocity deceleration effect can be expected.

[0029] Further, the slope erosion prevention net 1 is not limited to that shown in FIGS. 1 to 8 described above, and may be that shown in FIG. 9. That is, as shown in FIG. 9, the slope erosion prevention net 1 has an inclusion 13 (for example, an inclusion formed of a non-woven fabric) between a net fabric 11 to which a resistor (the resistor is omitted in FIG. 9) is attached and a contact net fabric 12 that contacts the slope. That is, by covering the slope 2 with a plurality of layers of fibrous bodies bound to the contact netting (underlying net) 12, the water resistance to fluids such as rainwater and overflow water on the slope 1 is improved, and erosion due to the flow velocity near the slope 2 and loosening of the slope 2 due to penetration are prevented. Since the slope erosion prevention net 1 ensures air permeability and water permeability, it does not hinder the abandonment of the embankment body and drainage performance, and has performance specialized for the erosion prevention measure of the slope 1. In particular, when the inclusion 12 is an inclusion that penetrates, more preferably, it is made of a non-woven fabric, the non-woven fabric reduces the action of the flow velocity and penetration, and the slope erosion prevention net 1 has the effect of improving the stability, strength, and durability of the non-woven fabric.

[0030] Although it is fixed to the slope 2 with an anchor (not shown), specifically, the lightweight erosion prevention net 1 is fixed to the slope 2 with a fixing member or the like. For example, there are methods such as driving an anchor pin (not shown) and attaching a rod-shaped or chain-shaped weight made of iron or the like to the end of the net to ensure weight. In addition, when covering a wide range of the slope 2 with the erosion prevention net 1, the joining method of the erosion prevention nets 1 is as follows. Although the erosion prevention net 1 is a lightweight covering body, it is desirable to connect a plurality of erosion prevention nets 1 of a certain size (for example, 2m×10m, 4m×10m, 6m×10m, etc.) to cover a wide range for manufacturing and construction efficiency. The erosion prevention net 1 is connected using a connecting member (not shown). For example, a rope, a fastener, etc. are used as the connecting member. When connecting, it is desirable to overlap the mutual slope erosion prevention nets 1 with a certain width (for example, 0.3m to 1.0m) and connect them.

[0031] In addition, according to the slope erosion prevention net 1 described in FIGS. 1 to 9 above, even after the installation of the slope erosion prevention net 1, since the growth of plants is not hindered through the mesh of the slope erosion prevention net 1, the roots of the plants are entangled in the mesh, and thus it is more firmly fixed to the slope 2.

Explanation of Signs

[0032] 1 Slope erosion prevention net 1A Mesh 1X Net leg 2 Normal plane 3 Resistor 4 Revetment work 11 Mesh 12 Contact mesh 13 Inclusion 31 Longitudinal shaped member 32 Annular net overhanging piece 33 Overhanging piece

Claims

1. A net for preventing slope erosion, which is made of a mesh laid on a slope surface, wherein a resistor for covering the meshes of the net for preventing slope erosion and decelerating the flow of fluids such as rainwater and overflow water is attached to the mesh. A net for preventing slope erosion, characterized by the above.

2. The resistor is provided with a plurality of longitudinal-shaped members that cross a plurality of meshes of the net for preventing slope erosion and are long in the longitudinal direction. The net for preventing slope erosion according to Claim 1, characterized by the above.

3. The resistor is provided with protruding pieces on the mesh legs that form the meshes of the net for preventing slope erosion at a plurality of meshes of the net for preventing slope erosion. The net for preventing slope erosion according to Claim 1, characterized by the above.

4. The resistor is provided with a plurality of annular nets made of mesh. The net for preventing slope erosion according to Claim 1, characterized by the above.

5. The net for preventing slope erosion has an inclusion between the mesh to which the resistor is attached and the contact mesh that contacts the slope surface. The net for preventing slope erosion according to any one of Claims 1 to 4, characterized by the above.

6. A method for preventing slope erosion by laying a net for preventing slope erosion made of mesh on a slope surface, wherein the net for preventing slope erosion, which covers the meshes of the net for preventing slope erosion and has a resistor for decelerating the flow of fluids such as rainwater and overflow water attached to the mesh, is laid on the slope surface, and the resistor is either provided with a plurality of longitudinal-shaped members that cross a plurality of meshes of the net for preventing slope erosion and are long in the longitudinal direction, or provided with protruding pieces on the mesh legs that form the meshes of the net for preventing slope erosion at a plurality of meshes of the net for preventing slope erosion, or provided with a plurality of annular nets made of the mesh. A method for preventing slope erosion, characterized by the above.

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