Soil covering sheet and method for installing soil covering sheet on natural ground

Abstract

To provide a soil covering sheet capable of more stably covering an area to be covered.SOLUTION: The soil covering sheet 100 has a back surface arranged on the soil side of the covering target area and a front surface facing away from the soil. The soil covering sheet 100 includes a sheet body 101 extending longitudinally and laterally so as to cover the soil surface of an area to be covered, and a plurality of turn-up prevention bodies 105 mounted on the surface side of the sheet body 101 so as to extend in a predetermined range on the surface of the sheet body 101 and configured to prevent the soil covering sheet 100 from turning up to the surface side.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a soil covering sheet that is installed so as to cover the soil surface, and a method for installing the soil covering sheet on natural ground. [Background technology]

[0002] Conventionally, soil covering sheets with various functions have been laid to cover soil in areas to be covered, such as natural ground or slopes, for the purpose of weed control and soil erosion prevention. For example, a soil covering sheet is a weed control sheet with shading properties to suppress the overgrowth of weeds in the soil of areas to be covered, such as natural ground or slopes. A weed control sheet with shading properties prevents weed sprouts from breaking through and blocks the supply of sunlight to the soil surface, thereby inhibiting plant photosynthesis and, as a result, suppressing weed growth.

[0003] For example, Patent Document 1 discloses a weed-control mat that is laid on the soil surface to be greened with vegetation while suppressing the proliferation of weeds. In the following paragraphs, the reference numerals of Patent Document 1 are indicated in parentheses. The weed-control mat (100) comprises a planar mat body (110) and a hollow tubular portion (120) extending upward from the surface (110a) of the mat body (110). The mat body (110) is made of a thick nonwoven fabric that is water-permeable, blocks sunlight, and prevents weeds from penetrating through. The mat body (110) comprises a covering portion (111) for covering the soil surface (G) and a vegetation portion (112) for planting vegetation plants (P) in the soil. The covering portion (111) is an area that blocks sunlight to prevent weed growth and prevents weeds from penetrating through the mat body (110) due to its thickness. According to the weed control mat (100), the mat body (110) and the cylindrical part (120) completely block out light, thereby preventing sunlight from promoting the growth of weeds. [Prior art documents] [Patent documents]

[0004] Patent Publication No. 2012-161276 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventional soil cover sheets, such as the weed control mat in Prior Art Document 1, have a problem in that after installation, they tend to curl up from their edges due to strong winds or deterioration over time, exposing the soil area to be covered. Specifically, as shown in FIG. 9(a), strong winds or deterioration over time cause the edges of the soil cover sheet to curl up and recede inward, exposing part of the soil area to be covered. Furthermore, as shown in FIG. 9(b), even if fixing devices (such as anchor pins or weights) are used to prevent the sheet from curling up, the soil cover sheet can tear at the fixing devices as it curls up, resulting in part of the soil area to be covered being exposed. Therefore, the inventors aimed to provide a soil cover sheet that can effectively prevent curling up even when it is affected by strong winds or deterioration over time.

[0006] The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a soil covering sheet that enables more stable coverage of the area to be covered, and a method for installing the soil covering sheet on the ground. [Means for solving the problem]

[0007] (Configuration 1) A soil covering sheet according to one embodiment of the present invention is a soil covering sheet having a back surface that is placed on the soil side of an area to be covered and a front surface that faces away from the soil, A sheet body extending lengthwise and widthwise so as to cover the soil surface of the coverage target area; It is characterized by having a plurality of anti-rolling bodies attached to the surface side of the sheet body so as to extend within a predetermined range on the surface of the sheet body and configured to prevent the soil covering sheet from rolling up onto the surface side.

[0008] According to one embodiment of the soil covering sheet of the present invention, by attaching a plurality of anti-rolling members to the surface side of the sheet body so that they extend over a predetermined range on the surface of the sheet body, it is possible to prevent the soil covering sheet from rolling up toward the surface side. In other words, by attaching the anti-rolling members to the surface side of the sheet body, it is possible to suppress the soil covering sheet from rolling up after laying, and to more stably cover the area to be covered.

[0009] (Configuration 2) A soil covering sheet according to a further embodiment of the present invention is the soil covering sheet according to configuration 1, characterized in that the anti-rolling member has a higher rigidity than the sheet body in a planar region where the anti-rolling member extends on the surface of the sheet body, so as to increase at least one of the tensile strength, bending strength, and shear strength of the sheet body. In other words, the mechanical strength of the sheet body is increased in the area of ​​the sheet body where the anti-rolling member is attached, and deformation of the sheet body that causes it to roll up due to the influence of strong winds, etc. is effectively prevented.

[0010] (Configuration 3) A further embodiment of the soil covering sheet of the present invention is characterized in that the effective height of the curling-up prevention body is 10 mm or less in the soil covering sheet of the embodiment 1 or 2. In other words, by limiting the protrusion of the curling-up prevention body when attached to the surface side of the sheet body to 10 mm or less, it is possible to prevent deposits from accumulating on the surface of the sheet body and to suppress the growth of weeds in the deposits.

[0011] (Configuration 4) A further embodiment of the soil covering sheet of the present invention is the soil covering sheet of any one of configurations 1 to 3, characterized in that the area of ​​the planar region where the plurality of anti-rolling bodies extend on the surface of the sheet body is 5% or less of the surface area of ​​the sheet body. In other words, by limiting the area of ​​the anti-rolling bodies extending on the surface of the sheet body to 5% or less of the surface area of ​​the sheet body, it is possible to prevent the soil covering sheet from increasing in weight or becoming unattractive.

[0012] (Configuration 5) A further embodiment of the present invention provides a soil covering sheet in any one of the embodiments 1 to 4, wherein the anti-rolling body is a longitudinal wire, rod, or plate made of an elastic-plastic material. That is, the anti-rolling body can be elastically deformed to conform to the unevenness of the soil surface, thereby improving the adhesion between the soil surface and the sheet body.

[0013] (Configuration 6) A further aspect of the present invention is a soil covering sheet according to any one of configurations 1 to 5, characterized in that each of the roll-up prevention members extends from a first edge on one side of the sheet to a second edge on the opposite side of the first edge, and the plurality of roll-up prevention members are arranged side by side at predetermined intervals. In other words, by installing the plurality of roll-up prevention members at predetermined intervals and each spanning from the first edge on one side of the sheet to the second edge on the other side, it is possible to effectively prevent both edges of the soil covering sheet from rolling up toward the surface.

[0014] (Configuration 7) A further embodiment of the soil covering sheet of the present invention is characterized in that, in the soil covering sheet of any of the embodiments 1 to 6, the sheet body comprises a laminated sheet formed by bonding together an upper-layer sheet body and a lower-layer sheet body. That is, by attaching a plurality of anti-rolling bodies to the surface side of the upper-layer sheet body, it is possible to prevent the upper-layer sheet body from peeling off from the lower-layer sheet body and causing only the upper-layer sheet body to roll up.

[0015] (Configuration 8) A further aspect of the present invention is a soil covering sheet comprising the soil covering sheet of any one of aspects 1 to 7, wherein the sheet body has a light-blocking property and comprises a weed control sheet body configured to suppress weed growth from the soil and to prevent weeds from penetrating through. In other words, the soil covering sheet can function as a weed control sheet.

[0016] (Configuration 9) A method according to one aspect of the present invention is a method for installing a soil covering sheet according to any one of the aspects 1 to 8 on a natural ground having an uneven and inclined surface, wherein the anti-lifting body is a wire made of an elastic-plastic material, and the method includes: laying the soil covering sheet on the soil surface of the natural ground so that the roll-up prevention body is arranged along a direction substantially perpendicular to the inclination direction of the soil surface; a step of elastically and plastically deforming one or more of the plurality of anti-lifting bodies in accordance with unevenness of the ground; and a step of engaging the fixing device with the curling prevention body and driving the fixing device into the soil. That is, by arranging the curling prevention body made of wire in a direction substantially perpendicular to the slope direction of the soil surface and allowing it to undergo elasto-plastic deformation to match the unevenness of the ground, areas with improved adhesion between the sheet body and the ground are formed in a level shape (stepwise on the slope), effectively preventing erosion of the ground surface. Furthermore, by driving the curling prevention body and the fixing device together, it is possible to more reliably prevent the sheet body from tearing and curling up starting from the fixing device. [Effects of the Invention]

[0017] The soil covering sheet of the present invention is prevented from curling up after installation due to strong winds or deterioration over time, and enables more stable coverage of the area to be covered. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a schematic perspective view of a soil covering sheet according to one embodiment of the present invention; [Figure 2] Schematic cross-sectional view of the soil cover sheet of Figure 1. [Figure 3] 1 is a schematic perspective view of an installation structure in which a soil covering sheet according to one embodiment of the present invention is laid on natural ground. [Figure 4] 4 is a schematic cross-sectional view of the installation structure of FIG. 3 along the longitudinal direction. [Figure 5] 4 is a schematic cross-sectional view of the installation structure of FIG. 3 along the lateral direction. [Figure 6] 1 is a schematic diagram showing the effect of preventing erosion by surface water of the ground in an installation structure in which a soil covering sheet according to one embodiment of the present invention is laid. [Figure 7] Schematic diagram showing the erosion caused by surface water on the natural ground when a conventional soil covering sheet is laid. [Figure 8] 4 is a schematic cross-sectional view of a soil covering sheet according to another embodiment of the present invention. [Figure 9] Photographs illustrating the curling up of a conventional soil covering sheet. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the shapes of the drawings referred to in the following description are conceptual or schematic diagrams for explaining preferred shapes and dimensions, and the dimensional ratios do not necessarily correspond to the actual dimensional ratios. In other words, the present invention is not limited to the dimensional ratios in the drawings.

[0020] The soil covering sheet 100 of one embodiment of the present invention is a weed control sheet used for applications in which it is laid on the soil surface of a target area of ​​natural ground (or a slope) to cover the soil surface and suppress the overgrowth of weeds in the soil. In this embodiment, the soil covering sheet 100 is described as being installed on uneven sloping soil, but it goes without saying that it may also be installed on a flat, non-sloped surface. In this specification, the side of the soil covering sheet 100 that is located on the toe of the slope (upper or higher side) when laid on a slope is defined as the "upper" position, and the side that is located on the toe of the slope (lower or lower side) is defined as the "lower" position. The soil covering sheet 100 extends lengthwise and widthwise to cover the target area, with the lengthwise direction aligned with the inclination direction of the slope and the widthwise direction aligned with the contour lines of the slope.

[0021] The soil covering sheet 100 has a back surface that is placed on the soil side of the natural ground or slope in the weed prevention target area, and a front surface that faces away from the soil. FIG. 1 is a schematic perspective view of the soil covering sheet 100 of one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the soil covering sheet 100 cut along the longitudinal direction. As shown in FIG. 1, the soil covering sheet 100 of this embodiment includes a flexible sheet body 101 that extends lengthwise and widthwise to cover the soil surface of the target area to be covered, and a plurality of roll-up prevention members 105 that are attached to the front side of the sheet body 101 so as to extend within a predetermined range on the surface of the sheet body 101 and are configured to prevent the soil covering sheet 100 from rolling up toward the front side. Note that the soil covering sheet 100 may be transported or stored rolled up, as shown in FIG. 1.

[0022] As shown in Figure 2, sheet 101 is a laminated sheet formed by bonding together weed control sheet 102, which has light-blocking properties and is designed to suppress weed growth from the soil and prevent weeds from penetrating through, and exterior sheet 103, which is laminated on the surface side of weed control sheet 102. The layers may be bonded to each other with an adhesive, or sewn together, or laminated by any joining means.

[0023] The weed control sheet 102 has shading properties and is configured to inhibit plant photosynthesis by blocking the supply of sunlight to the soil surface. The weed control sheet 102 must be tear-resistant and sufficiently thick to prevent strong weeds from breaking through. In this embodiment, the weed control sheet 102 is preferably made of a nonwoven fabric made of synthetic fibers such as polyester fiber, nylon fiber, or acrylic fiber, or a nonwoven fabric made of natural fibers such as hemp or coconut fiber. The weed control sheet 102 is also preferably water-permeable or water-retentive, and has a shading rate of 99.5% or more. The weed control sheet 102 should have a thickness of 2 to 5 mm and a weight of 100 to 600 g / m 2By setting the mass within this range, the weed control sheet 102 will have a high density (narrow spaces between fibers) that will prevent weeds with pointed leaves from penetrating through or taking root, and will also be able to maintain sufficient tensile strength over long periods of use.

[0024] The exterior sheet body 103 is configured for the purpose of improving the appearance. For example, the exterior sheet body 103 is a sheet made of natural fibers such as palm, or a sheet with a surface decorated with gravel or the like.

[0025] A plurality of roll-up prevention members 105 are attached to the front side of the sheet 101 via attachment members 107. In this embodiment, the attachment member 107 is a piece of cloth sewn to the sheet 101. However, any attachment member such as a C-ring, staple, tape, adhesive, etc. may be selected. Each roll-up prevention member 105 extends from a first edge portion on one side (in the width direction) of the sheet 101 to a second edge portion on the opposite side of the first edge portion. Two of the plurality of roll-up prevention members 105 are installed on (or near) both edge portions in the width direction, and a plurality of roll-up prevention members 105 are arranged side by side at a predetermined interval between them. The interval is preferably approximately 0.3 to 2 m.

[0026] Each anti-rolling element 105 is made of a longitudinal wire or rod made of an elastic-plastic material. Preferably, the anti-rolling element 105 is formed from a long iron wire that spans the entire width of the sheet 101. The anti-rolling elements 105 are bent at both ends to prevent injury to workers due to punctures. In this embodiment, the anti-rolling elements 105 are made of iron wire with a diameter of approximately 3.2 mm, and their effective height when attached to the sheet 101 is 10 mm or less. This prevents the soil cover sheet 100 from forming significant irregularities on its surface, preventing sediment from accumulating on the surface and suppressing the growth of weeds in the sediments. The proportion of the total surface area of ​​the sheet 101 occupied by the anti-rolling elements 105 is 0.32%. In other words, the total area of ​​the planar region where the multiple curling prevention members 105 extend on the surface of the sheet member 101 is 5% or less of the total surface area of ​​the sheet member 101. By keeping the proportion occupied by the multiple curling prevention members 105 small in this way, it is possible to minimize an increase in the weight of the soil covering sheet and a negative impact on the landscape when laid down.

[0027] Furthermore, the roll-up prevention members 105 have higher rigidity than the sheet member 101. As a result, the roll-up prevention members 105 function to increase at least one of the tensile strength, bending strength, and shear strength of the sheet member 101 in the planar region where they extend on the surface of the sheet member 101. Specifically, each roll-up prevention member 105 forms a linear rigid region spanning the range from one end to the other end in the width direction. Furthermore, a rigid region extending in the width direction near the edge of the vertical width is formed by one of the multiple roll-up prevention members 105 that is installed near the edge of the vertical width. The multiple rigid regions are formed approximately parallel to each other at a predetermined interval in the width direction. In other words, the multiple rigid regions are arranged to form the framework of the soil covering sheet 100, so that the sheet member 101 does not easily bend from the edge portion. That is, the multiple lift-up prevention members 105 provide rigidity to the entire sheet 101, thereby preventing the edges of the soil cover sheet 100 from lifting up. Furthermore, even if the upper exterior sheet 103 of the sheet 101 is peeled off from the lower weed control sheet 102, the multiple lift-up prevention members 105 provide rigidity to the upper exterior sheet 103, thereby preventing only the upper exterior sheet 103 from lifting up toward the surface.

[0028] Furthermore, due to the elastic-plastic material properties of each curling-up prevention body 105, it can bend and deform to fit any uneven shape. Since the curling-up prevention body 105 is connected to the sheet body 101, the sheet body 101 can also deform to follow the bending of each curling-up prevention body 105. That is, the curling-up prevention body 105 is configured to have both the ability to conform to the small unevenness of the natural ground to improve adhesion between the sheet body 101 and the natural ground surface, and the rigidity to prevent the sheet body 101 from curling up. In this embodiment, the curling-up prevention body 105 is formed from an iron wire, but the present invention is not limited to this and may be, for example, a long rod or plate.

[0029] Fig. 3 is a schematic perspective view showing an installation structure 10 in which one embodiment of a soil cover sheet 100 is laid on the ground, and Fig. 4 and Fig. 5 are cross-sectional views along the vertical direction (inclination direction) and horizontal direction (contour direction), respectively, of the installation structure 10. Note that Fig. 3 depicts a form in which one soil cover sheet 100 is laid, but it goes without saying that multiple soil cover sheets 100 may be laid side by side on the ground G.

[0030] As shown in FIG. 3, the soil cover sheet 100 is arranged to cover the target coverage area (or weed control area) of the ground G and is fixed to the ground G by multiple anchors (fixing devices) 109. Each anchor 109 has an L-shape with a head and a shaft. Here, multiple anchors 109 are used for one roll-up prevention body 105, and the multiple anchors 109 are entangled with one roll-up prevention body 105, pressing the roll-up prevention body 105 toward the ground at regular or irregular intervals along its length. Preferably, as shown in FIG. 4, each anchor 109 is driven so that the head of the anchor 109 engages with the roll-up prevention body 105 from the surface side and the shaft of the anchor 109 abuts the roll-up prevention body 105 from the underside of the slope. Anchors 109 are also driven into the sheet body 101 at locations between adjacent roll-up prevention bodies 105 in the vertical direction.

[0031] As shown in Figures 4 and 5, the soil cover sheet 100 is installed so that its longitudinal direction is aligned with the slope of the ground G and the extension direction of the roll-up prevention body 105 is aligned with the contour line direction of the ground G (a direction substantially perpendicular to the slope of the soil surface). As shown in Figure 5, the roll-up prevention body 105 undergoes elasto-plastic deformation in its extension direction (i.e., the contour line direction of the ground G) to conform to the unevenness of the ground G. In the lateral direction of the soil cover sheet 100, the sheet member 101 flexibly deforms in accordance with the elasto-plastic deformation of the roll-up prevention body 105, thereby effectively adhering to the uneven surface of the ground G without forming large gaps. Furthermore, the roll-up prevention body 105 undergoes elasto-plastic deformation when pressed by the anchor 109 from the surface side of the ground G, and is firmly fixed to the ground G. Furthermore, by arranging multiple roll-up prevention members 105 in a row at predetermined intervals in the vertical direction, a framework of rigid wires is formed in the soil cover sheet 100. At this time, multiple roll-up prevention members 105 extend on the surface of the sheet 101 to its edge, preventing the sheet 101 from rolling up at its edge. Similarly, at the points where the anchors 109 penetrate the sheet 101 between adjacent roll-up prevention members 105, the generation of strong tensile force between the anchors 109 and the sheet 101 is suppressed, preventing the sheet 101 from tearing from the anchors 109. In other words, in the installation structure 10, this rigid framework effectively prevents the soil cover sheet 100 from rolling up toward the surface, ensuring stable coverage of the area to be covered.

[0032] Furthermore, the soil cover sheet 100 of this embodiment can also exhibit the effect of preventing erosion of the natural ground G by reducing the flow rate of surface water flowing down the slope of the natural ground G. The effect of preventing erosion of the natural ground G will be described with reference to Figs. 6 and 7. Fig. 6 is a schematic diagram showing the effect of preventing erosion of the natural ground G by surface water W using the soil cover sheet 100. Fig. 7 is a schematic diagram showing the form of erosion caused by surface water W of the natural ground G when a conventional soil cover sheet (weed control sheet) 1 not having a curling prevention body 105 is laid.

[0033] As shown in Figure 7, a conventional soil cover sheet 1 typically used for weed control is made of a stiff material, and therefore can only be expected to adhere to the natural ground G at the location of the anchors 2. Therefore, when surface water W forms on the natural ground G due to rainfall or other factors, gaps are likely to form between the sheet and the natural ground G in other locations. As a result, the surface water W flows down the surface of the natural ground G on the backside of the soil cover sheet 1 without being slowed down, resulting in erosion of the natural ground G. On the other hand, as shown in Figure 6, the soil cover sheet 100 of this embodiment is also made of a stiff material. However, the sheet 101 adheres to the surface of the natural ground G across almost the entire lateral direction by means of anti-rolling structures 105 that plastically deform to conform to the unevenness of the natural ground G at predetermined intervals along the slope direction. These linear areas of adhesion are formed in a level pattern on the slope. As a result, the portions of the sheet body 101 and the anti-lifting body 105 that are in level contact with the surface of the ground G (not limited to the portions where the anchors 109 are driven) can block the surface water W, thereby reducing the flow rate of the surface water W of the ground G over the entire area where the soil cover sheet 100 is laid. As a result, the soil cover sheet 100 of this embodiment can exert an erosion prevention effect on the ground G.

[0034] The inventors conducted a demonstration test to confirm the erosion prevention effect of the soil cover sheet of the present invention. This demonstration test was conducted outdoors at an undisclosed site during the rainy season from early June to early July. Specifically, a soil cover sheet according to the example of the present invention and a soil cover sheet according to the comparative example were anchored to a slope of sandy soil, with a slope gradient of approximately 1:1.2 and a length of approximately 5 m. The soil cover sheet according to the example was formed by attaching multiple iron wires (3.2 mm diameter) longitudinally at intervals of approximately 1 m across the entire width of the weed control sheet. On the other hand, the soil cover sheet according to the comparative example consisted solely of the same weed control sheet as the example. The soil cover sheet was anchored to the slope in accordance with the installation structure 10 described above. The amount of soil erosion was evaluated by weighing the soil that washed down the slope due to rainfall or other factors. When the weight of soil that had flowed down the slope for both the Example and Comparative Example was measured, it was found that the weight of soil for the Example was 12.3% of the weight of soil for the Comparative Example, confirming that the amount of soil erosion had been significantly reduced. Therefore, it was proven that the soil covering sheet of the present invention is effective in preventing natural ground erosion.

[0035] Next, a method for installing the soil cover sheet 100 of this embodiment on a natural ground G having an uneven and inclined surface will be described. First, the soil cover sheet 100 is laid in the area to be covered on the soil surface of the natural ground G. At this time, the roll-up prevention body 105 is placed in a direction approximately perpendicular to the inclination direction of the soil surface. In particular, by unfolding the rolled soil cover sheet 100 by rolling it from a high point to a low point in the natural ground G, it is easy to place the soil cover sheet 100 so that its vertical direction is aligned with the inclination direction. Next, the roll-up prevention body 105, which is made of a wire rod of an elastic-plastic material, is elastic-plastically deformed to fit the unevenness of the natural ground G. An operator can bend and deform the roll-up prevention body 105 to follow the unevenness by pressing it toward the natural ground G using their hands or a tool. Next, an L-shaped anchor 109 (fixing device) is engaged with the roll-up prevention body 105 and driven into the soil. The worker may drive the anchors 109 into the soil with the heads of the anchors 109 engaged with the lift-up prevention bodies 105, thereby simultaneously performing elastic-plastic deformation of the lift-up prevention bodies 105. It is preferable that multiple anchors 109 are driven into one lift-up prevention body 105. It is also preferable that anchors 109 are similarly driven into the portions of the sheet body 101 between adjacent lift-up prevention bodies 105. Through the above steps, the soil cover sheet 100 can be installed in the natural ground G, and the installation structure 10 can be constructed.

[0036] In the above description of the installation method and installation structure 10 for the soil cover sheet 100, the soil cover sheet 100 is laid so that the longitudinal direction of the roll-up prevention body 105 is aligned along a direction (contour direction) that is approximately perpendicular to the inclination direction of the slope, but the method of using the soil cover sheet 100 is not limited to this. For example, if the length of the slope is sufficiently short compared to the length in the contour direction, the soil cover sheet 100 may be arranged so that the longitudinal direction of the roll-up prevention body 105 is aligned along the inclination direction of the slope, which allows for more efficient installation on the natural ground G. Alternatively, the soil cover sheet 100 may be arranged so that the longitudinal direction of the roll-up prevention body 105 is inclined both in the inclination direction of the slope and in the contour direction.

[0037] As described above, according to the soil covering sheet 100 of one embodiment of the present invention, it is possible to prevent the soil covering sheet 100 from rolling up toward the surface side by attaching a plurality of roll-up prevention members 105 to the surface side of the sheet body 101 so that they extend within a predetermined range on the surface of the sheet body 101. In other words, by attaching the roll-up prevention members 105 to the surface side of the sheet body 101, it is possible to suppress the roll-up of the soil covering sheet 100 after laying, and to more stably cover the area to be covered.

[0038] The present invention is not limited to the above-described embodiment, and various modifications are possible. Modifications of the present invention will be described below.

[0039] (1) The soil cover sheet of the present invention is not limited to the above-described embodiment and may take various forms. For example, FIG. 8 is a schematic cross-sectional view of a soil cover sheet 100′ according to a second embodiment of the present invention. In the soil cover sheet 100′ shown in FIG. 8, the sheet 101′ is a laminated sheet formed by bonding together a weed control sheet 102 having light-blocking properties and configured to suppress weed growth from the soil and prevent weeds from penetrating through the soil, and a water-blocking (water-repellent) sheet 104 laminated on the surface side of the weed control sheet 102. This water-blocking (water-repellent) sheet 104 can wash away soil and sand accumulated on the surface of the sheet 101′, more effectively preventing weeds from growing on the sheet surface. Furthermore, in the soil cover sheet 100′ shown in FIG. 8, the lift-up prevention member 105′ is made of a longitudinal plate made of an elastic-plastic material rather than a wire. Similarly, the curl-up prevention member 105' can be elastically and plastically deformed to fit the unevenness of the natural ground, thereby allowing the sheet member 101' to be tightly attached to the natural ground.

[0040] (2) The soil covering sheet of the present invention is not limited to the above-described embodiment and may take various forms. In the above-described embodiment, the sheet body is formed from two layers, but the present invention is not limited to this. For example, the exterior sheet body (or the waterproof sheet body) may be omitted from the sheet body, and the sheet body may be formed from only one layer of weed-control sheet body.

[0041] (3) The soil covering sheet of the present invention is not limited to the above-described embodiment and may take various forms. In the above-described embodiment, the soil covering sheet is configured as a weed control sheet, but the present invention is not limited to this. For example, the soil covering sheet may be used primarily for the purpose of preventing soil erosion.

[0042] (4) The soil cover sheet of the present invention is not limited to the above-described embodiment and may take various forms. In the above-described embodiment, the roll-up prevention body is formed as a straight wire, rod, or plate made of an elastic-plastic material, but the present invention is not limited to this. For example, the roll-up prevention body may be a wire bent into any shape. Alternatively, the roll-up prevention body may be a cement bag or the like.

[0043] The present invention is not limited to the above-described embodiments, but can be embodied in various forms within the technical scope of the present invention. [Explanation of symbols]

[0044] 10 Installation structure 100 Soil Covering Sheet 101 Sheet body 102 Weed control sheet (lower layer sheet) 103 Exterior sheet body (upper layer sheet body) 104 Water-impermeable sheet body (upper layer sheet body) 105 Roll-up prevention body 107 Mounting member 109 Anchor (fixing device) G. Natural ground (area to be covered) W surface water

Claims

1. A soil covering sheet having a back surface that is placed on the soil side of the area to be covered and a front surface that faces away from the soil, A sheet body extending lengthwise and widthwise so as to cover the soil surface of the coverage target area; A soil covering sheet characterized by comprising a plurality of anti-rolling bodies attached to the surface side of the sheet body so as to extend over a predetermined range on the surface of the sheet body and configured to prevent the soil covering sheet from rolling up onto the surface side.

2. The soil covering sheet described in claim 1, characterized in that the anti-rolling body has higher rigidity than the sheet body in the planar area where the anti-rolling body extends on the surface of the sheet body, so as to increase at least one of the tensile strength, bending strength, and shear strength of the sheet body.

3. 3. The soil covering sheet according to claim 2, wherein the effective height of the anti-roll-up member is 10 mm or less.

4. 4. The soil covering sheet according to claim 3, wherein the area of ​​the flat region where the plurality of anti-roll-up members extend on the surface of the sheet is 5% or less of the surface area of ​​the sheet.

5. 5. The soil covering sheet according to claim 4, wherein the anti-rolling body is an elongated wire, rod or plate made of an elastic-plastic material.

6. Each of the anti-lifting members extends from a first edge portion on one side of the sheet body to a second edge portion on the opposite side of the first edge portion, 6. The soil covering sheet according to claim 5, wherein the plurality of anti-roll-up members are arranged side by side at predetermined intervals.

7. 7. The soil covering sheet according to claim 6, wherein the sheet body is a laminated sheet formed by laminating an upper layer sheet body and a lower layer sheet body.

8. The soil covering sheet according to any one of claims 1 to 7, characterized in that the sheet body has a weed-proof sheet body that has light-blocking properties and is configured to suppress the growth of weeds from the soil and to prevent weeds from penetrating through.

9. A method for installing the soil covering sheet according to any one of claims 1 to 7 on a natural ground having an uneven surface and an inclined surface, wherein the anti-lifting body is a wire made of an elastic-plastic material, and the method includes: laying the soil covering sheet on the soil surface of the natural ground so that the roll-up prevention body is arranged along a direction substantially perpendicular to the inclination direction of the soil surface; a step of elastically and plastically deforming the upturning prevention body in accordance with unevenness of the ground; and engaging a fastener with the anti-lifting body and driving the fastener into the soil.

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