JP2022067283A - Vegetation mat, and installation structure - Google Patents

Abstract

To provide a vegetation mat capable of holding a bag material with a simpler structure.SOLUTION: A vegetation mat 100 comprises: a bag-like or cylindrical bag body 108 containing a vegetation material; a sheet member 101 having an arrangement area 103 which extends in a longer direction and a width direction for arranging the bag body 108; and a fastening member 110 connected to the sheet member 101 at a rear face side of the sheet member 101 so as to cross the longer direction of the arrangement area 103. The fastening member 110 and the sheet member 101 cooperatively surround the bag body 108 from a direction crossing the longer direction to hold.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vegetation mat laid on a slope, a slope, or other soil surface to be greened to promote soil greening, and an installation structure of the vegetation mat.

On the construction side of various slopes and newly created land, greening is actively carried out to preserve the landscape and environment of the slopes and prevent the outflow of earth and sand. Conventionally, vegetation mats that hold vegetation materials (or vegetation base materials) such as soil, seeds, fertilizers, and water-retaining materials are fixed to the soil using anchors or the like to perform greening.

Patent Document 1 discloses a vegetation mat for stable greening of a slope. Hereinafter, in the paragraph, the reference numerals of Patent Document 1 are shown in parentheses. The vegetation mat (1) is composed of a thick mat (3) made of plant fibers and a thin corrosive sheet (4). Then, a bag body (5) made of a water-soluble material filled with a vegetation base material (51) is arranged in parallel between the mat (3) and the sheet (4). The bag body (5) is filled with a vegetation base material (51) obtained by adding a water-repellent inhibitor to seeds, fertilizer, soil conditioner, and water-retaining material. The mat (3) and the sheet (4) are fixed by the fastening member (6) between the adjacent bag bodies (5). In the state where the vegetation mat (1) is laid, the vegetation bag (5) is covered with the thick mat (3), so that the vegetation base material (51) has good adhesion to the slope (2). Even after the water-soluble vegetation bag (5) has melted down, the vegetation base material (51) can be stably fixed on the slope (2) without being washed away.

Japanese Patent No. 27847760

In Patent Document 1, two mats, a mat on the surface layer side and a mat on the soil side, are prepared, a bag body is sandwiched between them, and both mats are pierced and hooked by a fastening member to vegetate mats (hereinafter referred to as vegetation mats). Vegetation mat) is composed. In such a conventional vegetation mat, two mats or sheet materials for sandwiching the bag body are required, so that the required materials are excessive and the manufacturing cost is improved. .. Therefore, the inventors have set the subject of the present invention to develop a new vegetation mat that can reduce materials and costs. Furthermore, in addition to the above-mentioned problems, the inventors also add to develop a vegetation mat that can stably promote soil greening by retaining the vegetation material of the bag body and / or the inside thereof for a long period of time. It was an issue.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a vegetation mat capable of holding a bag material with a simpler structure.

The vegetation mat according to claim 1 is a vegetation mat that extends vertically and horizontally so as to be laid in the soil.
A bag-shaped or tubular bag containing vegetation material,
A sheet member having an arrangement area extending in the longitudinal direction and the width direction for arranging the bag body, and
A fastening member connected to the seat member so as to intersect the longitudinal direction of the arrangement region on the back surface side of the seat member.
The fastening member and the seat member cooperate with each other to surround and hold the bag body from a direction intersecting in the longitudinal direction.

The vegetation mat according to claim 2 is the vegetation mat according to claim 1, wherein the arrangement area extends longitudinally in the horizontal direction of the sheet member and is arranged in a plurality of rows in the vertical direction. Intervening regions extend between the adjacent arrangement regions, and each of the arrangement regions is characterized in that a plurality of fastening members are provided along the longitudinal direction.

The vegetation mat according to claim 3 is the vegetation mat according to claim 1 or 2, wherein the arrangement area is a ridge that is raised toward the front surface side of the sheet member and is open to the back surface side, and the fastening is performed. The member is characterized in that it spans between the widthwise ends of the ridge.

The vegetation mat according to claim 4 is the vegetation mat according to any one of claims 1 to 3, wherein the sheet member is a net-like body formed by intersecting a plurality of net materials. ..

The vegetation mat according to claim 5 is the vegetation mat according to claim 4, wherein the fastening member is made of a wire rod, and an erection portion erected from one end to the other end of the arrangement region and both ends of the erection portion. It is characterized by having a connecting portion formed in the above and connected to one end and the other end in the width direction of the arrangement region.

The vegetation mat according to claim 6 is the vegetation mat according to claim 5, wherein the connecting portion is a loop portion formed by folding back at an end portion of the wire rod to form a loop, and the net material is the same. It has an inlet portion that is opened for introduction into the loop portion, and the entrance portion is closed in its original shape so as not to pass through the net material, and is configured to be opened by elastic deformation of the wire material. It is characterized by that.

The vegetation mat according to claim 7 is the vegetation mat according to any one of claims 1 to 6, further comprising a sheet with seeds attached to the back surface of the sheet member.

The installation structure according to claim 8 is characterized in that the vegetation mat according to any one of claims 1 to 7 is laid on the soil.

According to the vegetation mat according to claim 1, the fastening member and the seat member are connected to the seat member so as to intersect the longitudinal direction of the arrangement region on the back surface side of the seat member, so that the fastening member and the seat member form a bag. Surround and hold from the direction intersecting the longitudinal direction. That is, the vegetation mat of the present invention eliminates the need to bond two sheet members together in order to hold the bag body, and holds the bag body by using the sheet members and the fastening member in a cooperative manner. It has made it possible to construct vegetation mats with less material. Therefore, the vegetation mat of the present invention can hold the bag material with a simpler structure.

According to the vegetation mat according to claim 2, in addition to the effect of the invention according to claim 1, a plurality of arrangement regions can be arranged separated by an intervening region. Further, since a plurality of fastening members are provided along the longitudinal direction in each arrangement region, it is possible to more stably hold the long bag body.

According to the vegetation mat according to claim 3, in addition to the effect of the invention according to claim 1, the bag body is arranged inside the ridge (back surface side), and the fastening member is placed in the width direction of the ridge. By erection between the ends of the bag, the bag can be easily held against the seat member. Further, by raising the vegetation mat to the front surface side, the back surface of the vegetation mat can be brought into close contact with the soil surface flush with each other.

According to the vegetation mat according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, the reticulated sheet member inhibits the germination of plants or puts it on the soil. It is possible to prevent obstruction of the sunshine.

According to the vegetation mat according to claim 5, in addition to the effect of the invention according to claim 4, the fastening member can be easily connected to the mesh body via the connecting portion and is arranged at the erection portion. It is possible to support the bag body of the area from the back side.

According to the vegetation mat according to claim 6, in addition to the effect of the invention according to claim 5, the net material of the net-like body forming the sheet member can be easily formed into a loop portion through an inlet portion opened by elastic deformation. Can be introduced in. Since the inlet portion of the net material once arranged in the loop portion is closed by elastic return, it is prevented from being unexpectedly detached from the inlet portion. That is, the fastening member can be easily attached to and detached from the seat member.

According to the vegetation mat according to claim 7, in addition to the effect of the invention according to any one of claims 1 to 6, a vegetation mat is provided by providing a sheet with seeds on the back surface side of the sheet member and the bag body. Seeds can be effectively germinated throughout and vegetation mats can promote greening.

According to the installation structure according to claim 8, the effect of the invention relating to the vegetation mat according to any one of claims 1 to 7 can be exhibited as an installation structure. That is, in the installation structure of the present invention, the need to bond the two sheet members together in order to hold the bag body is eliminated, and the bag body is held by using the sheet members and the fastening member in a cooperative manner. It is possible to construct an installation structure with less material.

The schematic perspective view of the vegetation mat of one Embodiment of this invention. A partially enlarged perspective view of the vegetation mat of FIG. 1. (A) plan view and (b) bottom view of the vegetation mat of FIG. A cross-sectional view taken along the line AA of the vegetation mat of FIG. The perspective view which shows the fastening member of the vegetation mat of FIG. The schematic diagram which shows the method of connecting the fastener of FIG. 5 to a seat member. The schematic diagram which shows the installation structure immediately after installing the vegetation mat of one Embodiment of this invention on the soil surface of a slope. The schematic diagram which shows the installation structure after a lapse of time from the installation structure of FIG. The schematic diagram which shows the installation structure immediately after installing the vegetation mat of the conventional example of this invention on the soil surface of a slope. The schematic diagram which shows the installation structure after a lapse of time from the installation structure of FIG. An overall photograph of the installation structure 30 days after installation by a verification test relating to the vegetation mat of the present invention. Schematic cross-sectional view of the vegetation mat of the modification of this invention. The schematic diagram of the fastening member of the modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the shape of each figure referred to in the following description is a conceptual diagram or a schematic diagram for explaining suitable shape dimensions, and the dimensional ratio and the like do not always match the actual dimensional ratio. That is, the present invention is not limited to the dimensional ratio in the drawings.

The vegetation mat 100 of the present embodiment is laid on the soil so that the soil surface is greened with vegetation plants. As the vegetation plant, for example, grasses, native plants and the like may be introduced from the seeds, or the natural invasion of plants growing naturally in the vicinity may be promoted. It is also an object of the vegetation mat 100 to exert the effect of improving the landscape of the slope and preventing the outflow of earth and sand by laying it on the soil surface of the slope. However, the vegetation mat 100 of the present invention may be used on any soil surface other than the slope. Moreover, the "soil" herein includes all types of ground such as soft rocks, gravel soil and the like. Further, the "vegetation material" in the present specification is a material used for vegetation and includes at least one seed, fertilizer, soil conditioner, water retention material, water repellent inhibitor, earth and sand, growth base material and the like.

The vegetation mat 100 of the present embodiment is a mat having a predetermined size in the vertical and horizontal directions so as to be able to cover the soil to be greened, having a planar shape extending vertically and horizontally, and being able to deform the planar shape. The components of the vegetation mat 100 will be described with reference to FIGS. 1 to 4. FIG. 1 is a schematic perspective view of a vegetation mat 100 according to an embodiment of the present invention. FIG. 2 is a partially enlarged perspective view of the vegetation mat 100. 3 (a) and 3 (b) are a plan view and a bottom view of the vegetation mat 100. FIG. 4 is a sectional view taken along the line AA of the vegetation mat 100. In this specification, when the vegetation mat 100 is laid on the slope, the direction along the inclination direction of the slope is defined as the "vertical" direction, and the direction along the contour line direction of the slope is defined as the "horizontal" direction. .. Further, when the vegetation mat 100 is laid on the slope, the side arranged on the slope side (upper or higher place side) of the slope is set as the "upper" position, and the slope side (lower or lower place) of the slope is set. The side placed on the side) is defined as the "bottom" position.

The vegetation mat 100 has a front surface installed on the opposite side of the soil to be greened by vegetation plants and a back surface installed on the soil side. The vegetation mat 100 extends vertically and horizontally in a plane, and includes a sheet member 101 that constitutes the base of the vegetation mat 100, and a plurality of bag bodies 108 that are arranged at predetermined positions of the sheet member 101 and contain the vegetation material. The bag body 108 is provided with a plurality of fastening members 110 for fixing the bag body 108 to the seat member 101. As shown in FIG. 1, the vegetation mat 100 is vertically long and can be rolled and accommodated. When laying the vegetation mat 100 on a slope, the vegetation mat 100 can be easily installed on the slope by supporting one end of the vegetation mat 100 on the slope side and expanding the roll portion to the slope side. It is possible to do.

The bag body 108 is formed in the shape of a bag or a cylinder containing a vegetation material. More specifically, the bag body 108 is a long cylinder body extending longitudinally along the lateral direction of the vegetation mat 100. In the present embodiment, the bag body 108 is a vegetation bag containing a growth base material, but may be a fertilizer bag or the like mainly containing fertilizer. Further, the outer bag of the bag body 108 was formed of a material having a rooting property that allows the roots of vegetation plants to pass through and a water-decomposable material that is decomposed by one to several rainfalls after installation. Further, as shown in FIG. 2, in the cross-sectional view of the bag body 108 (orthogonal in the longitudinal direction), a non-hydrolyzed portion 108a for holding the internal vegetation material is provided on the outside of the lower outer surface of the outer bag. You may. The non-hydrolyzed portion 108a is a long piece having an arcuate cross-sectional shape or a cup shape extending in the longitudinal direction of the bag body 108. The non-hydrolyzable portion 108a is made of a non-hydrolyzable material, unlike the water-decomposable outer bag of the bag body 108. The non-hydrolyzed portion 108a can be formed from, for example, a hemp sheet, a hessian, a cotton sheet, a dense resin net, or the like. The non-hydrolyzed portion 108a remains even after the outer bag of the bag body 108 is hydrolyzed, suppresses the outflow of the vegetation material, and functions to keep the vegetation material in the arrangement region 103 for a long period of time. The non-hydrolyzed portion 108a may be attached to the outer surface of the outer bag of the bag body 108, or may be arranged as a separate member between the sheet member 101 and the bag body 108.

The sheet member 101 has a sheet or mat shape extending vertically and horizontally so that a plurality of bag bodies 108 can be arranged. In the present embodiment, the sheet member 101 is a net-like body formed by intersecting a plurality of net materials. More specifically, as shown in FIG. 2, the sheet member 101 is composed of a diamond-shaped wire mesh (or lath wire mesh) in which a plurality of metal wire mesh members are woven together. The sheet member 101 is made of a plurality of rigid mesh materials (steel wires) that are bent and extended in a zigzag shape in the lateral direction of the vegetation mat 100 as a diamond-shaped wire mesh, and these plurality of mesh materials are arranged side by side in the vertical direction to form a rhombus. It is woven into a wire mesh (or lath wire mesh). An intersection point 102 of the net-like body is formed at a position where the zigzag corners of each net material engage with each other in the vertical direction of the sheet member 101.

The sheet member 101 is deformable in the vertical direction and has rigidity in the lateral direction by displacing a plurality of adjacent net materials so as to be close to each other, separated from each other, or rotate. .. That is, the sheet member 101 can be expanded and contracted only in the vertical direction within a range in which each net material can move, and each net material rotates with each other with a zigzag corner as a fulcrum. It is deformable. Then, when laying the vegetation mat 100, the sheet member 101 is stretched (or stretched) in the length direction until the net materials come into contact with each other. On the other hand, when the vegetation mat 100 is not used (stored / stored), the sheet member 101 can be deformed into a compact sheet or rolled into a roll (see FIG. 1).

In this embodiment, the length of one side of the diamond-shaped stitch formed by the zigzag of a plurality of steel materials is about 50 mm. Considering both soil protection and avoidance of clogging of stitches, the stitches are preferably about 20 mm to 100 mm.

Further, the sheet member 101 has a plurality of arrangement areas 103 for arranging the plurality of bag bodies 108, and a plurality of intervening areas 104 intervening between the plurality of arrangement areas 103. Each arrangement region 103 extends in the longitudinal direction and in the width direction (with a width shorter than the length in the longitudinal direction), and is defined to correspond to the dimensional shape of the elongated bag body 108. Further, the longitudinal direction of the arrangement region 103 coincides with the horizontal direction of the vegetation mat 100, and the width direction coincides with the vertical direction of the vegetation mat 100. That is, the arrangement area 103 extends longitudinally in the lateral direction of the seat member 101 and is arranged in a plurality of rows in the vertical direction, and an intervening area 104 having a predetermined width is defined between the adjacent arrangement areas 103 and 103. In other words, a plurality of arrangement regions 103 and a plurality of intervening regions 104 are alternately formed in the vertical direction on the sheet member 101. In the present embodiment, the width of the arrangement region 103 is set to about 100 mm, and the width of the intervening region 104 adjacent to the arrangement area 103 is set to about 140 mm. Then, as shown in FIG. 4, each arrangement region 103 is formed as a ridge that is raised on the front surface side of the sheet member 101 and is open on the back surface side. Each ridge extends over the entire lateral direction of the vegetation mat 100, and its raised shape corresponds to the thickness of the bag body 108. As a result, as shown in FIG. 4, the bag body 108 can be accommodated in the space on the back surface side of the ridges of each arrangement region 103.

The fastening member 110 is arranged so as to intersect the longitudinal direction of the arrangement region 103 on the back surface side of the seat member 101, and is connected to the seat member 101. A plurality of fastening members 110 are provided in each arrangement region 103 along the longitudinal direction. As shown in FIGS. 2 and 4, the fastening member 110 is arranged so as to connect the intersections 102 and 102 of the sheet member 101 (net-like body). Further, in a cross-sectional view along the vertical direction of each arrangement region 103 shown in FIG. 4 (a cross section orthogonal to the longitudinal direction of the arrangement region 103), each fastening member 110 is an end portion in the width direction of the arrangement region 103 forming a ridge. It spans the gap. Then, the fastening member 110 spans the back surface side of the ridge, so that the back surface side of the arrangement region 103 is closed. In the cross-sectional view shown in FIG. 4, the length of the seat member 101 is larger than the length of the fastening member 110. In the present embodiment, the arc length in the width direction of the arrangement region 103 is about 1.1 to 1.3 times the length of the fastening member 110. As a result, a space for arranging the closed substantially semicircular bag body 108 is formed between the seat member 101 and the fastening member 110. That is, the fastening member 110 and the seat member 101 cooperate with each other to surround and hold the bag body 108 from the direction in which they intersect in the longitudinal direction.

The embodiment of the fastening member 110 of the present embodiment will be described in more detail with reference to FIG. As shown in FIG. 5, the fastening member 110 is made of a metal wire (steel wire) and is elastically deformable. Since the fastening member 110 is a rigid steel wire, when it is attached to the arrangement region 103, it can be prevented from being stretched in the width direction and deformed so that the arrangement area 103 is reduced or expanded in the width direction. ..

The fastening member 110 is formed at both ends of the erection portion 111 erected from one end to the other end of the arrangement region 103 and the erection portion 111, and is connected to one end and the other end in the width direction of the arrangement region 103. And prepare. The erection portion 111 extends linearly and has a strength and a shape capable of supporting the bag body 108 arranged in the arrangement region 103 from the back surface side. Further, the connecting portion 112 has a loop portion 113 folded back at the end of the wire rod (erection portion 111) to form a loop, and an inlet portion 114 for introducing the net material into the loop portion 113. The loop portions 113 and 113 at both ends are formed by being folded back on opposite sides to each other. The width of the loop portion 113 becomes narrower as it approaches the erection portion 111, so that the inlet portion 114 is closed to a width that does not allow the net material to pass through in its original shape. On the other hand, the inlet portion 114 can be opened by elastically deforming the wire rod. In the vegetation mat 100 of the present embodiment, the fastening member 110 is attached to the seat member 101 by arranging the two net materials at the intersection 102 in the loop portion 113 in a state where the inlet portion 114 is closed. There is. Further, on the erection portion 111 side of the entrance portion 114, a guide portion 115 extending in an inclined direction (direction becoming wider) away from the erection portion 111 is provided. Further, the wire rod is further folded back at the end portion of the guide portion 115 to form a knob portion 116 that can be operated by a finger. By operating the knob portion 116 with a finger, it is possible to elastically deform the fastening member 110 and open / close the inlet portion 114.

In the vegetation mat 100 of the present embodiment, both the sheet member 101 and the fastening member 110 are made of steel, and the steel materials form a tubular space for accommodating the bag body 108, so that the shape of the skeleton can be maintained for a long period of time. Is. That is, the vegetation mat 100 can stably hold the bag body 108 for a long period of time. Further, on the back surface of the vegetation mat 100, the intervening region 104 of the sheet member 101 and the bottom surface of the bag body 108 (fastening member 110) are arranged on substantially the same plane. That is, in the vegetation mat 100 of the present embodiment, the entire back surface of the vegetation mat 100 can be easily grounded to the soil, and the outflow of earth and sand can be effectively prevented.

Next, a method for manufacturing the vegetation mat 100 will be described. First, a plurality of arrangement areas 103 for arranging the bag body 108 on the sheet member 101 are determined, and the sheet is formed so as to form a plurality of protrusions along the lateral direction on the surface side at positions corresponding to the respective arrangement areas 103. The member 101 is deformed. At this time, each arrangement region 103 is formed as a concave groove or a concave groove when viewed from the back surface side. Next, the bag body 108 is arranged in the recess from the back surface side of each arrangement area 103. Then, by fastening the connecting portions 112, 112 at both ends of the fastening member 110 to the intersections 102, 102 of the net material located at both ends in the width direction of each arrangement region 103 from the back surface side of the sheet member 101, the fastening member 110 Can be connected to the sheet, and the open portion on the back surface side of the ridge can be closed by the erection portion 111. Similarly, a plurality of fastening members 110 are attached to the seat member 101 at a plurality of locations in the longitudinal direction of the arrangement region 103. As a result, the bag body 108 is surrounded by the fastening member 110 and the seat member 101 and held in the arrangement region 103. Before arranging the bag body 108 in the arrangement area 103, the fastening member 110 may be attached to the seat member 101, and then the bag body 108 may be inserted into the convex strip from the side.

Further, in order to mount the fastening member 110 on the seat member 101, the connecting portion 112 of the fastening member 110 may be pushed into the intersection 102. More specifically, as shown in FIG. 6A, when the inlet portion 114 of the connecting portion 112 is brought close to the intersection 102, the net material at the intersection 102 is guided by the guide portion 115 and is closed. Guided to 114. As shown in FIG. 6B, by pressing the inlet portion 114 against the net material, the wire material is elastically deformed, the inlet portion 114 is opened, and the net material can be arranged in the loop portion 113. .. When the net material moves into the loop portion 113, the wire rod elastically returns and the inlet portion 114 is closed again.

Further, the vegetation mat 100 of the present embodiment may optionally include a sheet with seeds 109 (see FIG. 7). The sheet with seeds 109 is composed of a sheet body extending in a plane shape to which a plurality of seeds are attached. The seeded sheet 109 can be attached to or bonded to the back surface of the sheet member 101 by any bonding means (not shown) such as an adhesive. The seeded sheet 109 can be made of paper, woven or non-woven fabric. Further, the sheet with seeds 109 can be formed of a hydrolyzable (water-soluble, water-fragile) sheet. The water-decomposable sheet can easily lose its shape and strength in a short period of time (one to several times of rainfall) after installation, such as being hydrolyzed by rainfall or being water-soluble. For example, water-decomposable non-woven fabrics and woven fabrics are made by binding polyester, polyethylene, polypropylene, nylon, polylactic acid, rayon, cotton, pulp, or a mixture thereof with a water-soluble adhesive (polyvinyl alcohol, PVA) or the like. Is.

Subsequently, the installation structure 10 in which the vegetation mat 100 of the present embodiment is laid on the soil surface of the slope G will be described.

FIG. 7 is a schematic view showing an installation structure 10 immediately after the vegetation mat 100 of the present embodiment is installed on the soil surface of the slope G. In the installation structure 10 of the present embodiment, a sheet with seeds 109 was added to the back surface of the sheet member 101 of the vegetation mat 100. In the installation structure 10 shown in FIG. 7, one or more vegetation mats 100 are fixed to the soil surface of the slope G with anchors or the like (not shown). In the installation structure 10, the vegetation mat 100 is installed on the slope G so that the vertical direction of the vegetation mat 100 is along the inclination direction of the slope G and the horizontal direction is along the contour line direction of the slope G. That is, the plurality of bag bodies 108 and the arrangement area 103 are arranged in parallel in the inclined direction. Regarding the installation method, the installation structure 10 can be constructed by laying the vegetation mat 100 holding the bag body 108 in advance on the slope G and fixing it with an anchor or the like. Alternatively, the installation structure 10 by the vegetation mat 100 can be constructed by laying the sheet member 101 on the slope G, fixing it with an anchor or the like, and attaching the bag body 108 to each arrangement area 103 with the fastening member 110.

In the installation structure 10 shown in FIG. 7, each arrangement area 103 of the vegetation mat 100 accommodates the bag body 108 and swells toward the surface side. The bag body 108 is held inside the ridges of the arrangement region 103 by the fastening member 110. Further, the bottom surface of the bag body 108 is in contact with the soil surface of the slope G via the sheet with seeds 109. At this time, since the fastening member 110 is made of a wire rod, most of the bottom surface of the bag body 108 can be grounded to the seeded sheet 109 and the soil surface. Further, while the arrangement region 103 of the sheet member 101 is raised from the soil surface, the intervening region 104 is in contact with the soil surface via the seeded sheet 109. That is, the vegetation mat 100 follows the surface shape of the soil over the entire back surface. Then, in the entire installation structure 10, the back surface of the vegetation mat 100 (sheet with seeds 109) is in close contact with the soil surface of the slope G with almost no gap, and protects the soil surface. That is, in the installation structure 10 of the present embodiment, the adhesion of the vegetation mat 100 to the soil surface is ensured, so that the settlement of the vegetation plants is promoted and the flow velocity of the flowing water flowing on the soil surface due to rainwater or the like is reduced. To. Further, since the skeleton (seat member 101 and fastening member 110) of the vegetation mat 100 is a rigid steel material, the bag body 108 is stably held without dropping even if anchor pins are not installed on all the bag bodies 108. can do. Further, the vegetation mat 100 can more firmly protect the soil surface of the slope G by the rigid wire mesh.

FIG. 8 is a schematic view showing the installation structure 10 after aging from the installation structure 10 of FIG. 7. In the present embodiment, since the outer bag of the bag body 108 and the sheet with seeds 109 are formed of a water-decomposable sheet, they disappear due to rainfall after a lapse of time. On the other hand, the non-hydrolyzed portion 108a, which is a part of the bag body 108, remains and holds the vegetation material so as to suppress the outflow of the vegetation material. Since the sheet member 101 and the fastening member 110 are made of steel, deterioration of the sheet member 101 itself over time is suppressed, and its shape can be maintained for a long period of time. As a result, it is possible to prevent the skeleton from floating from the soil surface of the slope G, and to maintain the vegetation material in the arrangement region 103 (or the soil surface) for a long period of time together with the non-hydrolyzed portion 108a of the bag body 108. be. Then, in the installation structure 10 after aging, as shown in FIG. 8, the vegetation plant P flourishes over the entire vegetation mat 100. That is, the installation structure 10 of the present embodiment effectively greens the slope G over the entire structure.

Next, in order to explain the features of the vegetation mat 100 and the installation structure 10 of the present embodiment in comparison with the conventional examples, the conventional vegetation mat 2 and the installation structure 1 thereof will be described with reference to FIGS. 9 and 10. do.

FIG. 9 shows an installation structure 1 immediately after the conventional vegetation mat 2 is installed on the soil surface of the slope G. The vegetation mat 2 of the conventional example is obtained by simply superimposing the bottom layer sheet 3 and the surface layer sheet 4 having the same vertical and horizontal dimensions and fastening them with the fastening member 9. Further, a sheet with seeds 7 is provided on the back surface of the bottom layer sheet 3. A long cylinder portion 5 for accommodating the bag body 8 is formed between the bottom layer sheet 3 and the surface layer sheet 4. Each of the adjacent long cylinder portions 5 is connected by the connecting portion 6. When the bag body 8 is filled in each long cylinder portion 5, both the bottom layer sheet 3 and the surface layer sheet 4 of each long cylinder portion 5 are deformed so as to swell. Then, both the bottom layer sheet 3 and the surface layer sheet 4 rise in a wavy shape over the entire vertical direction. As a result, in the installation structure 1, as shown in FIG. 9, only the most bulging portion of each long cylinder portion 5 comes into contact with the soil surface, and other portions such as the connecting portion 6 are lifted from the soil surface. .. In this way, if there is a gap between the vegetation mat 2 and the soil surface, running water due to rainwater or the like flows on the soil surface, the flow velocity is not sufficiently reduced, and soil erosion and seed outflow can be suppressed. Can not. As a result, as shown in FIG. 10, the vegetation plant P tends to grow in the long tube portion 5 holding the bag body 8, but the vegetation plant P is in the part other than the long tube portion 5 (particularly, the connecting portion 6). It is inevitable that the coverage of the material will be low. That is, it is known that the conventional vegetation mat 2 does not sufficiently exert the covering effect of the vegetation plant P as a whole mat.

The inventors conducted a verification test to confirm the action and effect of the vegetation mat of the present invention described above. The verification test was conducted by attempting soil greening on the slope with vegetation plants and observing the results over time on the site where entry from the outside was prohibited. The vegetation mat of the example had the same structure as the vegetation mat 100 (including the sheet with seeds 109) of the above embodiment. The vegetation mat of the comparative example is obtained by superimposing a net-like bottom layer sheet and a net-like surface layer sheet having the same vertical and horizontal dimensions so as to have the same cross-sectional shape as the conventional vegetation mat described with reference to FIG. A sheet with seeds similar to that in the examples was arranged on the back surface side. Further, the bottom layer sheet and the surface layer sheet of the vegetation mat of the comparative example are formed by joining two resin net bodies, and the lower mesh of the long cylinder portion is finer than the upper mesh. .. The tight mesh on the underside of the long tube serves to hold the vegetation material.

FIG. 11 is an overall photograph of the installation structure 30 days after the installation. In order to bring the comparison conditions as close as possible, the vegetation mat of the example and the vegetation mat of the comparative example were installed in a place adjacent to the slope. The left side of FIG. 11 shows an embodiment, and the right side shows a comparative example. As shown in FIG. 11, in the examples, almost no exposure of the ground surface was observed in the intervening region, and most of the vegetation mat was covered with vegetation plants. In the comparative example, the exposure of the ground surface was confirmed especially at the connecting portion, and only about half of the soil was covered with vegetation plants. According to FIG. 11, it can be seen that in the installation structure 30 days after the installation, the examples show a higher coverage than the comparative examples. That is, it is shown that the vegetation mat of the example shows a higher coverage by the vegetation plant than the vegetation mat of the comparative example, and is also advantageous in promoting soil greening.

Hereinafter, the action and effect of the vegetation mat 100 according to the embodiment of the present invention will be described.

According to the vegetation mat 100 of the present embodiment, the fastening member 110 is arranged so as to intersect the longitudinal direction of the arrangement region 103 on the back surface side of the sheet member 101, and is connected to one end and the other end in the width direction of the arrangement area 103. By doing so, the fastening member 110 and the seat member 101 surround and hold the bag body 108 from the direction in which they intersect in the longitudinal direction. That is, the vegetation mat 100 of the present embodiment eliminates the need to bond two sheet members in order to hold the bag body 108, and by using the sheet member 101 and the fastening member 110 in a cooperative manner, the bag is used. It held the body 108 and made it possible to construct the vegetation mat 100 with less material. Therefore, the vegetation mat 100 of the present embodiment has a simpler structure and can hold the bag body 108.

The present invention is not limited to the above embodiment, and various embodiments and modifications can be taken. Hereinafter, another embodiment of the present invention will be described. In each drawing, the components having a common code number have the same or similar characteristics unless otherwise specified.

(1) The structure of the vegetation mat of the present invention is not limited to the above embodiment, and may take various forms. For example, FIG. 12 is a schematic perspective view of a vegetation mat 200 according to another embodiment of the present invention. The vegetation mat 200 includes a bag body 208, a seat member 201, and a fastening member 210. The fastening member 210 is a steel wire bent in an annular shape, is wound around the bag body 208 so as to surround the entire circumference of the bag body 208, and is tied to the mesh of the sheet member 201. Then, the fastening member 210 and the seat member 201 cooperate with each other to surround and hold the bag body 208 from the direction intersecting in the longitudinal direction. Therefore, the fastening member of the present invention is not limited to the above embodiment, and may take various forms.

(2) The fastening member of the present invention is not limited to the above embodiment, and may take various forms. For example, the fastening member may be in the form of the fastening member 310 shown in FIG. The fastening member 310 has an erection portion 311 and connecting portions 312 and 312 at both ends thereof. Alternatively, the fastening member may take various forms such as a strip of metal, a cable tie, or a string.

(3) The sheet member of the above embodiment is formed of a diamond-shaped wire mesh, but the present invention is not limited thereto. For example, the sheet member may be a grid-like wire mesh having another shape instead of the diamond-shaped wire mesh. Further, the sheet member may be a net-like body made of synthetic resin or synthetic fiber instead of the wire mesh. Alternatively, the sheet member may be composed of a water-permeable sheet such as a non-woven fabric or a woven fabric sheet instead of a net-like body.

(4) The vegetation mat of the above embodiment includes a sheet with seeds on the back surface side of the sheet member, but in the present invention, the sheet with seeds may be omitted. Further, the sheet with seeds may be laid directly on the soil surface such as a slope instead of the vegetation mat.

The present invention is not limited to the plurality of examples described above, and can be carried out in various embodiments as long as it belongs to the technical scope of the present invention.

10 Installation structure 100 Vegetation mat 101 Sheet member 102 Intersection point 103 Arrangement area 104 Intervention area 108 Bag body 108a Non-hydrolyzed part 109 Seed sheet 110 Fastening member 111 Elevation part 112 Connecting part 113 Loop part 114 Entrance part 115 Guide part 116 Knob part P Vegetation plant G slope

Claims (8)

It is a vegetation mat that extends vertically and horizontally so that it can be laid in the soil.
A bag-shaped or tubular bag containing vegetation material,
A sheet member having an arrangement area extending in the longitudinal direction and the width direction for arranging the bag body, and
A fastening member connected to the seat member so as to intersect the longitudinal direction of the arrangement region on the back surface side of the seat member.
A vegetation mat characterized in that the fastening member and the sheet member cooperate to surround and hold the bag body from a direction intersecting in the longitudinal direction. The arrangement region extends longitudinally in the lateral direction of the seat member and is arranged in a plurality of rows in the vertical direction, and an intervening region extends between the adjacent arrangement regions of the seat member, and the respective arrangements are described. The vegetation mat according to claim 1, wherein the region is provided with a plurality of fastening members along the longitudinal direction. The arrangement region is a ridge that is raised toward the front surface side of the sheet member and is open to the back surface side, and is characterized in that the fastening member spans between the widthwise ends of the ridge. The vegetation mat according to claim 1 or 2. The vegetation mat according to any one of claims 1 to 3, wherein the sheet member is a net-like body formed by intersecting a plurality of net materials. The fastening member is made of a wire rod, is formed at both ends of the erection portion erected from one end to the other end of the arrangement region, and is connected to one end and the other end in the width direction of the arrangement region. The vegetation mat according to claim 4, wherein the vegetation mat is provided with a portion. The connecting portion has a loop portion formed in a loop shape by being folded back at an end portion of the wire rod, and an inlet portion opened for introducing the net material into the loop portion. The vegetation mat according to claim 5, wherein the vegetation mat is closed in its original shape so as not to pass through the net material, and is configured to open by elastically deforming the wire material. The vegetation mat according to any one of claims 1 to 6, further comprising a sheet with seeds attached to the back surface of the sheet member. An installation structure characterized in that the vegetation mat according to any one of claims 1 to 7 is laid in soil.

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