Embankment erosion prevention sheet

Abstract

To provide an embankment runoff prevention sheet that is easy to install, can reliably prevent the runoff of embankments, and can efficiently drain rainwater and other liquids away from the embankment area. [Solution] The embankment runoff prevention sheet 1 for preventing the runoff of embankment soil comprises an embankment support member 2 having an embankment support area 21 on which the embankment soil 7 is placed, and a waterproof covering member 3 having a covering area 31 that covers the upper surface of the embankment soil and a water channel area 32 for draining rainwater, wherein the end edge of the embankment support member is joined to the back side of the boundary between the covering area and the water channel area of ​​the covering member, and a water-stopping weir 33 is provided at the end edge of the water channel area.

Description

Technical Field

[0001] The present invention relates to an embankment outflow prevention sheet.

Background Art

[0002] In recent years, due to the occurrence of heavy rainstorms, etc., earth and sand such as embankments artificially piled up have flowed out, and the occurrence of secondary disasters and environmental pollution has become a problem. In such a situation, especially in Okinawa Prefecture, in order to prevent the pollution of the water quality of public water areas due to the outflow of red soil, etc. generated along with embankment construction, etc. by civil engineering works, the Okinawa Prefecture Red Soil Outflow Prevention Ordinance (Okinawa Prefecture Ordinance No. 36) has been implemented, and the construction management of embankments, etc. is strictly regulated.

[0003] On the other hand, heretofore, for the purpose of preventing the outflow of embankments, an embankment covering sheet for covering the upper surface of the embankment has been proposed (for example, Patent Document 1). This embankment covering sheet has a configuration in which weight bars are provided at both ends of a rectangular sheet subjected to waterproofing treatment, and by covering the embankment surface with this and making the sheet adhere to the ground with the weight bars, it is said that it can prevent being rolled up or blown away by the wind.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the embankment covering sheet of Patent Document 1 is applied to an embankment, in the face of recent intense wind and rain, there are cases where the outflow of the embankment cannot be suppressed only by the weight of the weight bars provided at both ends. Also, it was insufficient as a countermeasure for the construction management conditions in the Okinawa Prefecture Red Soil Outflow Prevention Ordinance.

[0006] This invention has been made in view of the circumstances described above, and aims to provide an embankment runoff prevention sheet that is easy to install, can reliably prevent the runoff of embankments, and can efficiently drain rainwater and other liquids outside the embankment area. [Means for solving the problem]

[0007] To solve the above problems, the present invention is characterized by the following:

[0008] Firstly, the embankment runoff prevention sheet of the present invention is an embankment runoff prevention sheet for preventing the runoff of embankment soil, An embankment support member having an embankment support area on which an embankment is placed, It consists of a waterproof covering member having a covering area that covers the top surface of the embankment and a channel area for draining rainwater. The end portion of the embankment support member is joined to the back side of the boundary between the covering area and the waterway area of ​​the covering member. The invention is characterized by having a water-stopping weir at the edge of the aforementioned waterway area. Secondly, in the embankment runoff prevention sheet of the first invention described above, it is preferable that the water-stopping weir portion is formed by inserting a core material through a sheath portion formed at the edge of the waterway area. Thirdly, in the embankment runoff prevention sheet of the first or second invention described above, it is preferable that the thickness of the covering member is greater than that of the embankment support member, and that at least the surface is treated to prevent ultraviolet degradation. Fourth, in the embankment runoff prevention sheet of the first to third inventions described above, it is preferable that a fixing portion is provided in at least one of the covering area, the waterway area, and the embankment placement area of ​​the covering member. Fifth, in the embankment runoff prevention sheets of the first to fourth inventions described above, it is preferable that the surface of the aforementioned placement area and the back surface of the covering area are distinguished by different colors or patterns. Sixth, in the embankment runoff prevention sheets of the first to fifth inventions described above, it is preferable that a joining portion is provided for joining adjacent embankment runoff prevention sheets together. [Effects of the Invention]

[0009] According to the embankment runoff prevention sheet of the present invention described above, it is easy to install, can reliably prevent the runoff of embankments, and can efficiently drain rainwater and other liquids outside the embankment area. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic perspective view showing one embodiment of the embankment runoff prevention sheet of the present invention. [Figure 2] This is a top view of an embodiment in which a joint is provided to connect adjacent embankment runoff prevention sheets. [Figure 3] This is a schematic diagram illustrating an embodiment of the method for installing the embankment runoff prevention sheet of the present invention, where (A) shows the embankment support member installation process, (B) shows the embankment support process, (C) shows the covering area installation process, and (D) shows the waterway area installation process. [Figure 4] This is a schematic diagram illustrating another embodiment of the method for installing the embankment runoff prevention sheet of the present invention, where (A') shows the embankment support member installation process, (B') shows the embankment support process, (C') shows the covering area installation process, and (D') shows the waterway area installation process. [Modes for carrying out the invention]

[0011] The embankment runoff prevention sheet of the present invention will be described in detail below with reference to the drawings. Figure 1 is a schematic perspective view showing one embodiment of the embankment runoff prevention sheet of the present invention.

[0012] The embankment runoff prevention sheet 1 of the present invention is a sheet used to prevent embankment runoff due to wind and rain, and consists of an embankment support member 2 having an embankment support area 21 and a covering member 3 having a covering area 31 and a waterway area 32, with the end edge of the embankment support member 2 joined to the back side of the boundary between the covering area 31 and the waterway area 32 of the covering member 3.

[0013] In the embankment outflow prevention sheet 1 of the present embodiment, the material of the embankment placement member 2 is not particularly limited as long as it is a sheet-like material having a predetermined strength. For example, a generally distributed waterproof sheet made of polyethylene (blue sheet), a cloth sheet with surface waterproof treatment, a rubber sheet, etc. can be used, but it is preferable to use a blue sheet from the viewpoints of handleability and cost.

[0014] The embankment placement area 21 of the embankment placement member 2 is an area where the embankment 7 is placed on its upper surface when laid on the ground 6. The area of the embankment placement area 21 is not particularly limited as long as it is an area where all or part of the embankment 7 to be placed can be placed and is an area that is fixed so as not to move easily after the embankment 7 is placed. By placing the embankment 7 on the embankment placement area 21 of the embankment placement member 2, the embankment outflow prevention sheet 1 can be stably installed by the weight of the embankment 7.

[0015] In addition, the meaning of the embankment in the present invention is a structure artificially constructed by stacking earth and sand, etc., and in addition to construction embankments, disaster prevention embankments, civil engineering embankments, it also means a structure in a broad sense including earth mounds constructed for defense and partitioning.

[0016] The covering member 3 joined to the end of the embankment placement member 2 is not particularly limited as long as it is a sheet-like material having a predetermined strength and waterproofness like the above embankment placement member 2. For example, a generally distributed waterproof sheet made of polyethylene (blue sheet), a cloth sheet with surface waterproof treatment, a rubber sheet, etc. can be used, and particularly, a blue sheet can be preferably used from the viewpoints of handleability and cost.

[0017] The covering area 31 of the covering member 3 is an area that covers all or part of the upper surface of the embankment 7 placed on the embankment placement area 21 of the embankment placement member 2. The area of the covering area 31 in the covering member 3 can be appropriately determined according to the volume of the embankment 7 to be covered, the area of the upper surface, etc., and is not particularly limited, but it is preferable to have a wide area that can cover the entire upper part of the embankment 7 from the viewpoint of suppressing the outflow of the embankment 7.

[0018] The water channel area 32 of the covering member 3 is an area extending downstream of the covering area 31 of the covering member 3. After installation, it contacts the ground 6 at the edge of the embankment placement area 21 and is an area for a flow path that collects and drains rainwater from the covering area 31 during rainfall. Further, a water stop weir portion 33 for efficiently collecting rainwater is provided at the edge portion of the water channel area 32.

[0019] The shape of the water stop weir portion 33 is not particularly limited as long as it can block and guide the rainwater in the water channel area 32 to flow. For example, as shown in FIG. 1, a sheath portion can be formed at the edge portion of the water channel area 32, and the water stop weir portion 33 can have a structure in which a core material is inserted into the sheath portion. As the core material, a long L-shaped member or rod-shaped member made of metal or resin, a tubular member such as a single pipe can be used, and among these, it is preferable to use a single pipe.

[0020] In the embankment outflow prevention sheet 1 of the present invention, it is preferable to use a covering member 3 having a thickness greater than that of the embankment placement member 2. Further, it is preferable that the surface of the covering member 3 is subjected to an ultraviolet degradation prevention treatment. Thereby, it is possible to prevent damage due to aging deterioration of the sheet after installation, and it becomes possible to prevent the outflow of the embankment 7 over a long period of time.

[0021] Further, in the embankment outflow prevention sheet 1 of the present embodiment, it is preferable to provide a fixing portion in at least any one of the covering area 31, the water channel area 32, and the embankment placement area 21 of the covering member 3. The fixing portion is not particularly limited as long as each member can be easily and surely fixed. For example, as shown in FIGS. 1 and 2, a configuration in which holes such as stitches are provided and an anchor or the like is inserted and fixed, or a configuration in which a sheath portion is formed at a predetermined position and a tubular member or the like as a weight is inserted into the sheath portion can be exemplified as the fixing portion. Also, the number and installation position of the fixing portions can be appropriately determined according to the design.

[0022] Furthermore, in the embankment runoff prevention sheet 1 of the present invention, it is preferable to provide joints 5 that connect adjacent embankment runoff prevention sheets 1 in order to reliably cover a wide area of ​​embankment 7 with multiple embankment runoff prevention sheets 1. The joining structure used for the joints 5 is not particularly limited as long as adjacent sheets do not easily shift or separate, for example, fasteners, hook-and-loop fasteners, snap buttons, hook-shaped fasteners, etc. can be provided. The installation position, number, and shape can also be appropriately determined according to the design.

[0023] The following describes in detail one embodiment of the method for installing the embankment runoff prevention sheet 1 of the present invention. Figures 3(A) to 3(D) show one embodiment of the method for installing the embankment runoff prevention sheet 1 of the present invention. The method for installing the embankment runoff prevention sheet 1 of this embodiment includes an embankment support member installation step, an embankment support step, a covering area installation step, and a waterway area installation step.

[0024] (Embankment support member installation process) In the embankment support member installation process, as shown in Figure 3(A), the embankment support member 2 is installed at the predetermined location where the embankment 7 will be constructed, with the embankment support area 21 of the embankment support member 2 facing upwards and the covering area 31 of the covering member 3 turned upside down. When installing the embankment support member 2, it is preferable to fix it to the ground 6 using the fixing member 411 of the fixing part 41 provided on the embankment support member 2. This prevents the embankment support member 2 from shifting from its predetermined position due to wind and rain, and allows the embankment 7 to be placed in the correct position.

[0025] (Embankment placement process) In the embankment placement process, as shown in Figure 3(B), the embankment 7 is placed on the embankment placement area 21 of the embankment placement member 2. At this time, it is necessary for the embankment 7 to be placed accurately and reliably on the embankment placement area 21. To this end, it is preferable to visually distinguish the surface of the embankment placement area 21 of the embankment placement member 2 and the back surface of the covering area 31 of the inverted covering member 3 with different colors or patterns to clearly define the areas. By distinguishing the back surface of the embankment placement area 21 and the covering area 31 and making them identifiable by visual inspection, it is possible to reliably place the embankment 7 only on the embankment placement area 21 without placing it in positions outside the embankment placement area 21 or on the back surface of the covering area 31.

[0026] (Covered area installation process) In the covering area installation process, as shown in Figure 3(C), the covering member 3, which is folded over at the edge of the embankment placement area 21, is placed over the upper surface of the embankment 7 to cover it with the covering area 31. When covering the embankment 7, it is preferable to fix it with the fixing member 421 of the fixing part 42 so that the sheet does not peel off due to wind and rain and the embankment 7 does not wash away.

[0027] In this embodiment, to ensure secure installation of the sheet, the front and rear sides of the embankment 7 are covered and secured. Specifically, the end of the embankment support member 2 on the rear side of the embankment 7 is bent and pulled up, and then secured by the fixing member 411 of the fixing part 41. Furthermore, the covering area 31 of the covering member 3 covers that portion and is then secured by the fixing member 421 of the fixing part 42.

[0028] (Waterway area installation process) Next, in the water channel area installation process, as shown in Figure 3(D), the water channel area 32, which extends from the covering area 31 of the covering member 3, is installed and fixed by the fixing member 431 of the fixing part 43. The water channel area 32 is installed so that rainwater from the covering area 31 can be collected and efficiently drained by the water-stopping weir 33 provided at the end of the water channel area 32. Specifically, for example, it is preferable to install it on the ground 6 which is sloped and recessed from the covering area 31 in order to make the water flow from the covering area 31 smooth.

[0029] Furthermore, in addition to the embodiment shown in Figure 3, the installation method of the embankment runoff prevention sheet 1 of the present invention can also be the installation method of other embodiments shown in Figures 4(A') to (D'). In the other embodiment shown in Figure 4, in the embankment placement process, as shown in Figure 4(B'), a portion of the front side of the embankment 7 is placed on the embankment placement area 21 of the embankment placement member 2, and then, as shown in Figure 4(C'), the covering member 3 is placed over the upper surface of the front side of the embankment 7, covering only the front side with the covering area 31 and fixed with the fixing member 421. In other words, in the installation of the embankment runoff prevention sheet 1 of the present invention, it is assumed that at least the front part of the embankment 7 is covered, and the settings can be appropriately changed depending on the situation.

[0030] By installing the embankment runoff prevention sheet of the present invention through the above-described process, it is possible to easily and reliably prevent the runoff of embankments, and to efficiently drain rainwater and other liquids outside the embankment area. [Explanation of Symbols]

[0031] 1. Embankment erosion prevention sheet 2. Embankment support members 21 Embankment placement area 3 Covering member 31 Covered area 32 Waterway area 33 Water-stopping weir section 41, 42, 43, fixed part 411, 421, 431 Fixing members 5 Joint 6 ground 7. Embankment

Claims

1. A soil runoff prevention sheet for preventing soil runoff from embankments, An embankment support member having an embankment support area on which an embankment is placed, It consists of a waterproof covering member having a covering area that covers the top surface of the embankment and a channel area for draining rainwater. The end portion of the embankment support member is joined to the back side of the boundary between the covering area and the waterway area of ​​the covering member. A soil erosion prevention sheet characterized by having a water-stopping weir at the edge of the aforementioned waterway area.

2. The embankment runoff prevention sheet according to claim 1, characterized in that the water-stopping weir portion is formed by inserting a core material through a sheath portion formed at the edge of the waterway area.

3. The embankment runoff prevention sheet according to claim 1, characterized in that the thickness of the covering member is greater than that of the embankment support member, and at least the surface is treated to prevent ultraviolet degradation.

4. The embankment runoff prevention sheet according to claim 1, characterized in that a fixing portion is provided in at least one of the covering area, the waterway area, and the embankment placement area of ​​the covering member.

5. The embankment runoff prevention sheet according to claim 1, characterized in that the surface of the mounting area and the back surface of the covering area are distinguished by different colors or patterns.

6. The embankment erosion prevention sheet according to claim 1, characterized in that it is provided with a joint for joining adjacent embankment erosion prevention sheets together.

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