Embankment runoff prevention sheet

Abstract

To provide an embankment outflow prevention sheet which is easy to install, can surely prevent the outflow of embankments, etc., and can efficiently drain rainwater, etc., out of an embankment area. [Solution] An embankment runoff prevention sheet 1 for preventing the runoff of embankments, comprising an embankment placing member 2 having an embankment placing area 21 on which embankment 7 is placed, and a waterproof covering member 3 having a covering area 31 that covers the top surface of the embankment and a waterway area 32 through which rainwater flows, the edge of the embankment placing member being joined to the back side of the boundary between the covering area and the waterway area of ​​the covering member, and a water-stopping dam section 33 being provided on the edge of the waterway area.

Description

[Technical Field]

[0001] The present invention relates to an embankment runoff prevention sheet. [Background technology]

[0002] In recent years, sudden heavy rainfall has caused the runoff of artificially built embankments, resulting in secondary disasters and environmental pollution. In light of this situation, Okinawa Prefecture in particular has enacted the Okinawa Prefecture Red Soil Runoff Prevention Ordinance (Okinawa Prefecture Ordinance No. 36) to prevent the contamination of public water bodies due to the runoff of red soil and other materials generated by embankment construction during civil engineering work, and has imposed strict regulations on the management of embankment construction work.

[0003] Meanwhile, embankment covering sheets that cover the top surface of embankments have been proposed to prevent the embankment from washing away (for example, Patent Document 1). These embankment covering sheets are constructed with weighted rods attached to both ends of a waterproof rectangular sheet, which covers the surface of the embankment and adheres tightly to the ground with the weighted rods, preventing the sheet from being turned up or blown away by the wind. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 60-190835 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when the embankment covering sheet of Patent Document 1 is applied to an embankment, the weight of the weight bars attached to both ends alone may not be enough to prevent the embankment from escaping in the severe winds and rains that have occurred in recent years. Also, it is insufficient as a countermeasure against the construction management conditions in the Ordinance for Prevention of Red Soil Erosion, etc., enforced in Okinawa Prefecture.

[0006] The present invention was made in consideration of the above-mentioned circumstances, and aims to provide an embankment erosion prevention sheet that is easy to install, can reliably prevent the erosion of embankments, etc., and can efficiently drain rainwater, etc., outside the embankment area. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention has the following features.

[0008] First, the embankment erosion prevention sheet of the present invention is an embankment erosion prevention sheet for preventing the erosion of embankments, an embankment placing member having an embankment placing area on which embankment is placed; The covering member is made of a waterproof material having a covering area that covers the top surface of the embankment and a waterway area that drains rainwater. An edge portion of the embankment placing member is joined to the back side of the boundary portion between the covering area and the waterway area of ​​the covering member, A water blocking dam is provided at the edge of the waterway area. Secondly, in the embankment runoff prevention sheet of the first invention, it is preferable that the water-stopping dam portion is formed by inserting a core material into a sheath portion formed on the edge portion of the waterway area. Thirdly, in the embankment runoff prevention sheet of the first or second invention, it is preferable that the thickness of the covering member is greater than that of the embankment placing member, and that at least the surface thereof is treated to prevent deterioration by ultraviolet light. Fourth, in the embankment runoff prevention sheets of the first to third inventions, it is preferable that fixing portions are provided in at least one of the covering region, the waterway region and the embankment placing region of the covering member. Fifth, in the embankment runoff prevention sheets of the first to fourth inventions, it is preferable that the surface of the placing area and the back of the covering area are differentiated by different colors or patterns. Sixth, in the embankment outflow prevention sheets according to the first to fifth aspects of the present invention, it is preferable that a joint portion is provided for joining adjacent embankment outflow prevention sheets together. [Effects of the Invention]

[0009] The embankment washout prevention sheet of the present invention is easy to install, can reliably prevent the washout of embankments, etc., and can efficiently drain rainwater, etc., outside the embankment area. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a schematic perspective view showing an embodiment of an embankment runoff prevention sheet of the present invention. [Figure 2] FIG. 10 is a top view of an embodiment in which a joint is provided to join adjacent embankment runoff prevention sheets together. [Figure 3] 1 is a schematic explanatory diagram of an embodiment of the method for installing an embankment runoff prevention sheet of the present invention, in which (A) shows the embankment placement member installation process, (B) shows the embankment placement process, (C) shows the covered area installation process, and (D) shows the waterway area installation process. [Figure 4] 1 is a schematic explanatory diagram of another embodiment of the method for installing an embankment runoff prevention sheet of the present invention, where (A') shows the embankment placement member installation process, (B') shows the embankment placement process, (C') shows the covered area installation process, and (D') shows the waterway area installation process. DETAILED DESCRIPTION OF THE INVENTION

[0011] The embankment erosion 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 erosion prevention sheet of the present invention.

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

[0013] In the embankment runoff prevention sheet 1 of this embodiment, the material of the embankment placement member 2 is not particularly limited as long as it is a sheet-like material with a predetermined strength, and for example, commonly available polyethylene waterproof sheets (blue sheets), cloth sheets with waterproof surfaces, rubber sheets, etc. can be used, but it is preferable to use blue sheets from the standpoint of ease of handling and cost.

[0014] The embankment placing area 21 of the embankment placing member 2 is an area on the upper surface of which the embankment 7 is placed when the embankment placing member 2 is laid on the ground 6. The area of ​​the embankment placing area 21 is not particularly limited, as long as it is an area that can accommodate all or part of the embankment 7 to be placed and that can secure the embankment 7 so that it does not move easily after being placed. By placing the embankment 7 in the embankment placing area 21 of the embankment placing member 2, the weight of the embankment 7 allows the embankment runoff prevention sheet 1 to be stably installed.

[0015] In this invention, the term "embankment" refers to a structure constructed by artificially piling up earth and sand, etc., and refers to a structure in a broad sense, including construction embankments, disaster prevention embankments, civil engineering embankments, as well as earthworks constructed for defense or division purposes.

[0016] The covering member 3 joined to the end of the embankment placing member 2 is not particularly limited as long as it is a sheet-like material with a predetermined strength and waterproofness, similar to the above-mentioned embankment placing member 2.For example, a commonly available polyethylene waterproof sheet (blue sheet), a cloth sheet with a waterproof surface, a rubber sheet, etc. can be used, and blue sheets are particularly preferred from the standpoint of ease of handling 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 in the embankment placing area 21 of the embankment placing member 2. The area of ​​the covering area 31 of the covering member 3 can be determined appropriately depending on 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 that it be a large area that can cover the entire upper area of ​​the embankment 7 from the perspective of preventing the embankment 7 from flowing out.

[0018] The waterway area 32 of the covering member 3 is an area that extends downstream of the covered area 31 of the covering member 3, and after installation comes into contact with 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 covered area 31 during rainfall. In addition, a water cut-off dam section 33 is provided at the edge of the waterway area 32 to efficiently collect rainwater.

[0019] The shape of the water-stopping dam section 33 is not particularly limited as long as it can block rainwater in the waterway area 32 and guide it to flow away, but for example, as shown in Fig. 1, the water-stopping dam section 33 can have a structure in which a sheath section is formed at the edge of the waterway area 32 and a core material is inserted into the sheath section. The core material can be a long L-shaped member or rod-shaped member made of metal or resin, or a tubular member such as a single pipe, and among these, a single pipe is preferably used.

[0020] The thickness of the covering member 3 in the embankment erosion prevention sheet 1 of the present invention is preferably thicker than that of the embankment placing member 2. In addition, it is preferable that the surface of the covering member 3 is treated to prevent ultraviolet degradation. This makes it possible to prevent damage due to deterioration over time of the sheet after installation, and to prevent the erosion of the embankment 7 for a long period of time.

[0021] Furthermore, in the embankment runoff prevention sheet 1 of this embodiment, it is preferable to provide fixing parts in at least one of the covering region 31, the waterway region 32, and the embankment placing region 21 of the covering member 3. The fixing parts are not particularly limited as long as they can easily and reliably fix each member, but examples include fixing parts configured to provide eyelets or the like and insert anchors or the like into fixing holes as shown in Figures 1 and 2, or fixing parts configured to form sheaths at predetermined positions and insert tubular members or the like as weights into the sheaths. Furthermore, the number and installation positions of fixing parts can be determined appropriately depending on the design.

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

[0023] An embodiment of the method for installing the embankment runoff prevention sheet 1 of the present invention will be described in detail below. Figures 3(A) to 3(D) show an 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 placing member installing step, an embankment placing step, a covered area installing step, and a waterway area installing step.

[0024] (Embankment placement component installation process) In the embankment placing member installation step, as shown in Figure 3(A), the embankment placing member 2 is installed at a predetermined position where the embankment 7 will be constructed, with the embankment placing area 21 of the embankment placing member 2 facing up and the covering area 31 of the covering member 3 turned upside down. When installing the embankment placing member 2, it is preferable to fix it to the ground 6 using the fixing members 411 of the fixing parts 41 provided on the embankment placing member 2. This makes it possible to prevent the embankment placing member 2 from shifting from its predetermined position due to wind, rain, etc., and allows the embankment 7 to be placed in the correct position.

[0025] (Embankment placement process) In the embankment placing step, as shown in FIG. 3(B), the embankment 7 is placed on the embankment placing area 21 of the embankment placing member 2. At this time, the embankment 7 needs to be placed accurately and securely in the embankment placing area 21. For this purpose, it is preferable to visually distinguish the front surface of the embankment placing area 21 of the embankment placing member 2 from the back surface of the covering area 31 of the inverted covering member 3 using different colors or patterns to clearly define the areas. By distinguishing the embankment placing area 21 from the back surface of the covering area 31 and making them visually identifiable, it is possible to reliably place the embankment 7 only on the embankment placing area 21, without placing the embankment 7 in a position outside the embankment placing area 21 or on the back surface of the covering area 31.

[0026] (Covered area installation process) In the covering area installation step, as shown in Fig. 3(C), the covering member 3 is folded back at the edge of the embankment placement area 21 and placed over the top surface of the placed 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 flow away.

[0027] In this embodiment, in consideration of the reliable installation of the sheet, the sheet is fixed by wrapping around the front and rear sides of the embankment 7. Specifically, the end of the embankment placing member 2 on the rear side of the embankment 7 is folded and pulled up and fixed by the fixing member 411 of the fixing part 41, and this part is then covered by the covering region 31 of the covering member 3 so as to include the folded end and fixed by the fixing member 421 of the fixing part 42.

[0028] (Waterway area installation process) Next, in the water channel area installation step, as shown in Fig. 3(D), the water channel area 32 extending from the covered area 31 of the covering member 3 is installed and fixed by the fixing members 431 of the fixing parts 43. The water channel area 32 is installed so that rainwater from the covered area 31 can be collected and efficiently drained away by the water cut-off dam parts 33 provided at the edge parts of the water channel area 32. Specifically, for example, in order to smooth the flow of water from the covered area 31, it is preferable to install the water channel area 32 on the ground 6 that is recessed at an angle from the covered area 31.

[0029] Furthermore, the method for installing the embankment runoff prevention sheet 1 of the present invention can be the installation method of other embodiments shown in Figures 4(A') to (D') in addition to the embodiment shown in Figure 3 above. In the other embodiment shown in Figure 4, in the embankment placing step, as shown in Figure 4(B'), a part of the front side of the embankment 7 is placed on the embankment placing area 21 of the embankment placing 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 to cover only the front side with the covering area 31 and fixed with the fixing member 421. In other words, when installing the embankment runoff prevention sheet 1 of the present invention, the installation method can be set and changed as appropriate depending on the situation, assuming that at least the front part of the embankment 7 is covered.

[0030] By installing the embankment erosion prevention sheet of the present invention using the above-mentioned steps, it is possible to easily and reliably prevent embankments and the like from eroding, and also to efficiently drain rainwater and the like outside the embankment area. [Explanation of symbols]

[0031] 1. Embankment runoff prevention sheet 2 Embankment placement materials 21 Embankment placement area 3 Covering materials 31 Covered Area 32 Waterway area 33 Water cutoff dam 41, 42, 43, fixed part 411, 421, 431 Fixing members 5 Joint 6 ground 7 Embankment

Claims

1. An embankment outflow prevention sheet for preventing the outflow of embankments, an embankment placing member having an embankment placing area on which embankment is placed; The covering member is made of a waterproof material having a covering area that covers the top surface of the embankment and a waterway area that drains rainwater. An edge portion of the embankment placing member is joined to the back side of the boundary portion between the covering area and the waterway area of ​​the covering member, A water cutoff dam portion is provided at an edge portion of the waterway area, An embankment runoff prevention sheet characterized in that the water-stopping dam portion is formed by inserting a core material into a sheath portion formed at the edge portion of the waterway area.

2. 2. The embankment runoff prevention sheet according to claim 1, wherein the thickness of the covering member is greater than that of the embankment placing member, and at least the surface thereof is treated to prevent ultraviolet degradation.

3. 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 placing area of ​​the covering member.

4. 2. The embankment runoff prevention sheet according to claim 1, wherein the surface of the placing area and the back of the covering area are differentiated by different colors or patterns.

5. 2. The embankment runoff prevention sheet according to claim 1, further comprising a joint portion for joining adjacent embankment runoff prevention sheets to each other.

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