JP5463917B2 - Weedproof structure, construction method thereof, and plate member - Google Patents

Description

  The present invention relates to a construction method for constructing a herbicidal structure including a herbicidal sheet in a place where it is necessary to prevent grass growth on a sloped or cut sloped area. It is related with the construction method which fixes the upper end part or lower end part of a weed prevention structure.

  A road, a track, or the like may be formed on an upper part sandwiched between slopes (slopes) on both sides of embankment or cut, and a lower part sandwiched between slopes (slopes) on both sides of cut. If the slopes (slopes) on both sides of the embankment or cut are exposed, the weeds will grow over the slope. Then, there is a possibility that the aesthetics will be lost due to the weeds on the slope, etc., or the weeds between the shoulders of the road and the shoulders or the buttocks will extend to the road side, and the safety of passersby and vehicles is there. For this reason, it has been proposed to lay a weedproof sheet on the road shoulder and the slope adjacent thereto to prevent the growth of grass such as weeds. The “slope” in this specification means a slope made of roads, railways and their surrounding slopes, cuts, embankments, etc., a slope between two ground surfaces with steps, It means a slope between the ground surfaces and between two ground surfaces.

  In order to prevent grass growth, for example, a herbicidal sheet as disclosed in Patent Document 1 is used.

  As a structure for preventing grass growth, for example, in Patent Document 2, a concrete block portion laid on a road shoulder at the upper end of a slope portion and one end portion on the slope side of the concrete block portion are integrally formed. There is disclosed a road shoulder block that includes a fixed grass prevention sheet portion and that can be covered with a slope portion by spreading the grass prevention sheet portion on the slope surface portion in a state where the concrete block portion is laid on the road shoulder portion. Further, in Patent Document 2, a weedproof sheet having an upper end fixed to a structure on the shoulder is hung down along the slope, and a number of fasteners are provided between the top and bottom of the weedproof sheet along the slope. How to fix is shown.

  Patent Document 3 is characterized in that a light-shielding and water-impervious synthetic resin embossed sheet (weedproof sheet) in which a large number of convex portions are alternately formed on both sides of the sheet is laid and fixed on the ground to be weeded. And a herbicidal structure. Patent Document 3 discloses that when there is a guard rail on the road shoulder, a caulking material is packed in a gap between the guard rail column and the insertion hole of the guard rail column formed in the embossed sheet (weedproof sheet). . Also, in Patent Document 3, a weedproof sheet with its upper end fixed to a structure on the shoulder is hung down along the slope, and the top and bottom of the weedproof sheet are several fixed pins along the slope. How to fix is shown.

  Further, in Patent Document 4, the lower end of the weedproof sheet is embedded in a road shoulder concrete block at the outer edge of the butt and is bent into an L-shaped cross section, and the inside of one area piece in a long embedded member consisting of two area pieces. A method is disclosed in which the upper end of the weedproof sheet is pressed against the slope and the other end piece is embedded in the slope to fix the upper end of the weedproof sheet.

  In Patent Document 5, the upper end of the weedproof panel is fixed to the structure of the shoulder, the grassproof panel is placed as it is along the slope, and the lower end of the weedproof panel is bent into an L-shaped cross section. The long member (locking part) consisting of the two region pieces is fixed to the outside of one region piece with a screw and a split groove, and the other one region piece is engaged with the slope and placed under the grass protection sheet. A method of fixing the side end is disclosed.

JP 2002-272348 A JP 2005-307518 A JP 2006-177122 A JP 2008-184814 A Japanese Patent Laid-Open No. 11-6122

By the way, as a method of fixing a conventional weedproof sheet to a slope, there has been proposed a method in which a fixing pin or the like is embedded in the slope from above the weedproof sheet placed on the slope as described above. Yes. Moreover, the following three construction methods are proposed when using a member of L-shaped cross section and fixing a weedproof sheet.
(1) First, fix one end of the weedproof sheet on one region piece of the L-shaped member by bonding or the like, and use an instrument etc. at the position where the other one region piece of the L-shaped member is placed on the slope Then, a hole is dug in a lateral groove shape, and the other one region piece of the L-shaped member is placed and then backfilled. In this case, the fixing of the weedproof sheet is only for adhesion on one region piece of the L-shaped member, so that when the other one region piece is driven, the solidified adhesive portion may be damaged by the impact. Therefore, it is difficult to drive.
(2) An L-shaped member is buried first, and a weedproof sheet is adhered thereon. In this case, since the L-shaped member can be simply driven in from the top, it is not necessary to dig a groove first. However, it is necessary to hold down from above until the bonded portion is solidified.
(3) It hangs down along the slope of the weedproof sheet, digs a hole in the horizontal groove shape using a tool along its lower end, and presses the lower end of the weedproof sheet with one area piece of L-shaped member And then backfill. In this case, since the slope is made of earth and stone and is not soft and flat, it is difficult to fix by adhesion or the like. Therefore, the lower end of the weedproof sheet in this case is finally fixed by a fixing pin or the like.

  However, with the fixing method using only the fixing pins of the grass prevention sheet, it was difficult to prevent the sloped stones from flowing out or falling. In addition, when an L-shaped member is used and a hole is dug in a lateral groove shape on the slope, the work on the slope is difficult, and the excavation labor is great. When excavating on slopes, the excavated soil tends to fall, and the lower slope and the bottom of the slope may be soiled with debris, and the lower operator may endanger the soil. A great deal of effort was required to transport from top to bottom. In addition, when the L-shaped member is first filled, it is difficult to maintain the force of pressing on the slope perpendicularly to the slope during the solidifying time of the adhesive from above.

  In addition, when fixing the upper edge of the weedproof sheet to the slope, if the hole is dug along the upper edge of the weedproof sheet, the weedproof sheet may become soiled with falling debris. In some cases, man-hours such as cleaning increased. Also, when fixing the upper edge of the weed protection sheet to the slope and fixing the weed prevention sheet only with the fixing pin, rainwater flowing on the surface from the upper side of the slope flows into the weed prevention sheet. By doing so, there was a possibility of damaging the fixed part at the lower end of the non-permeable grass-proofing sheet.

  Therefore, in order to solve the above-mentioned problems, the present invention reduces the labor for excavating the debris of the slope when fixing the upper end or the lower end of the waterproof grassproof sheet to the slope in the embankment or cut. An object of the present invention is to provide a weedproof structure that prevents the fall of excavated debris and prevents rainwater flowing on the slope surface from flowing into the back side of the sheet when the upper end portion is fixed, and a construction method thereof.

(1) In order to solve the above-mentioned problem, the method for constructing a weedproof structure according to the present invention is an end portion of a weedproof structure formed on a slope area in embankment or cutting based on a weedproof sheet. A step of attaching at least one end of the weedproof sheet to the flat surface of the plate-like member, and an edge on the open end side of the long side of the plate-like member to which the weedproof sheet is attached With a predetermined angle toward the slope.
According to the construction method of the weedproof structure of this aspect, the plate-like member is fixed to one end of the weedproof sheet, and the grassproof sheet is easily fixed to the middle of the slope by installing it at a predetermined angle on the slope. Can be.
It should be noted that the predetermined angle when the edge of the long side of the plate-like member is set at a predetermined angle with the edge on the open end side facing the slope is particularly limited as long as the plate-like member can be firmly fixed to the slope area. There is no. For example, it may be perpendicular to the slope, or may be parallel or perpendicular to a plane ahead of the shoulder or a plane ahead of the slope. Accordingly, the angle may be about 0 to 90 ° with respect to the vertical direction of the slope, but is usually about 0 to 60 ° with respect to the vertical direction of the slope.

(2) Preferably, in the step of attaching the herbicidal sheet to the plate-like member in the construction method of the herbicidal structure according to the present invention, the end of the long side of the plate-like member is folded by folding at least one end of the herbicidal sheet. You may make it attach so that it may wind around a part.
According to the construction method of the weedproof structure of this aspect, the attachment strength of the weedproof sheet to the plate-like member can be improved by attaching the weedproof sheet to the plate-like member. Moreover, since the tip part attached so that it winds becomes a drawing resistance like an anchor in the soil of a slope, fixation to a slope can be strengthened.

(3) Preferably, in the step of attaching the weedproof sheet to the plate-like member in the construction method of the weedproof structure according to the present invention, at least one end of the weedproof sheet may be bonded or fused. .
According to the construction method of the weedproof structure of this aspect, attachment of the weedproof sheet to the plate-shaped member is facilitated by bonding or fusing one end of the weedproof sheet to the plate-shaped member.

(4) Preferably, the plate-like member in the construction method of the weed proof structure according to the present invention has a shape in which the flat surface is divided into two region pieces by the bent portion along the long side, and the weed proof sheet is attached. In the step of installing the plate-shaped member thus formed, the region piece on the release end side may be installed at a predetermined angle toward the slope, and the region piece on the grass prevention sheet side may be installed parallel to the slope. .
According to the construction method of the weedproof structure of this aspect, the bent plate-like member is used, and the region piece 40b on the release end side of the bent plate-like member is installed at a predetermined angle on the slope, so that the weedproof The sheet is not bent at the edge of the plate member, the deterioration of the weedproof sheet is reduced, and the fixing strength of the weedproof sheet to the slope is improved.

(5) Preferably, the plate-like member in the construction method of the weedproof structure according to the present invention has a long side dimension equal to or less than the short side dimension of the herbicidal sheet, and the step of attaching the weedproof sheet to the plate-like member Then, you may make it attach an individual plate-shaped member for every weed prevention sheet | seat.
According to the construction method of the weedproof structure of this aspect, the plate-like member can be attached to each weedproof sheet by using the long side of the plate-like member for each sheet with the shorter side dimension of the weedproof sheet. And construction is easy.

(6) Preferably, as for the plate-shaped member in the construction method of the weedproof structure according to the present invention, the dimension of the long side excludes the overlap margin portion with the adjacent weedproof sheet from the short side dimension of the weedproof sheet. In the step of attaching the weedproof sheet to the plate-like member, an individual plate-like member may be attached to each of the weedproof sheets while providing an overlapping portion of the adjacent weedproof sheets.
According to the construction method of the weedproof structure of this aspect, by setting the long side of the plate-like member to be equal to or less than the short side dimension of the weedproof sheet minus the overlap allowance dimension, an overlap allowance is provided between each adjacent weedproof sheet. However, a plate-like member can be attached to each weedproof sheet.

(7) Preferably, the plate-like member in the construction method of the herbicidal structure according to the present invention has a diameter equal to or larger than the diameter of the nail-like tool in at least one of the two region pieces in which the flat surface is divided by the bent portion along the long side. After the step of installing a plate-like member having a hole with a diameter of and having a grass-proof sheet attached, a nail-like instrument is placed on the slope through the hole in the grass-proof sheet and the plate-like member You may make it have the process to do.
According to the construction method of the weedproof structure of this aspect, the plate-like member has a hole for a nail-like instrument, and the fixing strength is improved by driving the plate-like member to the slope with the nail-like instrument. be able to.

(8) Preferably, the plate-like member in the construction method of the weedproof structure according to the present invention has a hole for a nail-like instrument at least in an overlapping portion of adjacent grass-proof sheets, and the nail-like instrument is a slope. In the step of placing the nail-like device, the nail-like instrument may be placed on the slope by penetrating the overlap margin portion of the adjacent weedproof sheets and the hole of the plate-like member.
According to the construction method of the weedproof structure of this aspect, the hole for the nail-shaped instrument is an overlap margin portion of the weedproof sheet, and the overlap margin portion of the plate-like member is driven on the slope with the nail-like instrument. Since the overlap margin is twice the thickness dimension, it is difficult to generate a crack of the weedproof sheet in the nail-like instrument portion, and the fixing strength can be improved. In addition, the connection between each weed protection sheet is not only bonded or fused, but also a mechanical connection by a needle-like instrument is added, so that the connection strength is increased and the integrated strength as a weedproof structure is improved. Can do.

Preferably, in the step of installing on the slope the plate-like member attached with the herbicidal sheet in the construction method of the grass-proof structure according to the present invention, a step of digging a groove of a size capable of embedding the plate-like member in advance, You may make it have a process of embedding the plate-shaped member to which the weedproof sheet was attached.
According to the construction method of the weedproof structure of this aspect, it is possible to ensure the fixing of the weedproof sheet in the middle of the slope by digging a groove in advance and embedding the plate member.

Preferably, in the step of digging a groove having a dimension capable of embedding the plate-like member in advance in the construction method of the weedproof structure according to the present invention, a tool having rotating teeth may be used to form the groove. .
According to the construction method of the weedproof structure of this aspect, digging can be facilitated by using a tool such as a diamond cutter having rotating teeth capable of forming narrow grooves for digging.

Preferably, in the step of digging a groove having a dimension capable of embedding the plate-like member in advance in the construction method of the weedproof structure according to the present invention, the groove is formed along the end using a scoop-like tool. Also good.
According to the construction method of the weedproof structure of this aspect, digging can be facilitated by using a scoop-like tool for forming a narrow groove for grooving.

Preferably, in the step of digging a groove having a dimension capable of previously embedding the plate-like member in the construction method of the weedproof structure according to the present invention, in order to form the groove, a thickness and a length equivalent to those of the plate-like member in advance. You may make it form a groove | channel by driving the plate-shaped body which has a dimension into a slope.
According to the construction method of the weedproof structure of this aspect, the groove is formed by previously driving a plate-like body (plate-like member) that has been processed into a shape that can be pierced into the earth and stone, such as by sharpening the tip of the groove. Can be made easier.

Preferably, in the step of installing the plate-like member attached with the grass-proof sheet in the construction method of the grass-proof structure according to the present invention on the slope, the plate-like member attached with the grass-proof sheet is placed. May be.
According to the construction method of the weed prevention structure of this aspect, the man-hour at the time of laying a weed prevention sheet | seat can be reduced by driving in a plate-shaped member suddenly without digging a groove | channel.

(14) Preferably, before and after the step of attaching the end portion of the weedproof sheet to the plate-like member in the construction method of the weedproof structure according to the present invention, the portion of the weedproof sheet that protrudes from the short side of the plate-like member Among these, you may make it have the process of excising a part from the part which can be attached to an adjacent plate-shaped member.
According to the construction method of the weedproof structure of this aspect, it is possible to facilitate the connection of the weedproof sheet by excising a part of the portion of the weedproof sheet that is attached to the adjacent plate member.

Preferably, in the step of cutting a part from a portion attachable to an adjacent plate-like member in the construction method of the weedproof structure according to the present invention, a part of the folded portion of the part is cut off. Also good.
According to the construction method of the weedproof structure of this aspect, by cutting out only a part of the folded portion among the parts attached to the adjacent plate member in the weedproof sheet, the strength of the weedproof sheet is reduced. It is possible to facilitate the connection of the weedproof sheet while minimizing it.

(16) Moreover, the weed prevention structure of this invention is formed by the above-mentioned construction method.
According to the weedproof structure of this embodiment, the plate-like member is fixed to one end of the weedproof sheet, and is installed on the slope at a predetermined angle, thereby facilitating the fixing of the weedproof sheet in the middle of the slope. Can do.

(17) Moreover, the plate-shaped member of this invention is used with the above-mentioned construction method, and the dimension of a long side is below the short side dimension of a weedproof sheet.
According to the plate-like member of this aspect, by fixing the long side dimension to be equal to or less than the short-side dimension of the weedproof sheet, the plate-like member can be easily fixed to one end of the weedproof sheet, and the adjacent weedproof sheet. The next plate-like member adjacent to the slope can be easily fixed, and the installation at a predetermined angle to the slope becomes easy, so that the grass-proof sheet can be easily fixed on the slope.

(18) Preferably, the plate-shaped member of the present invention may have a cross-sectional shape of an L shape or a fold shape.
According to the plate-like member of this aspect, the plate-like member to which one end of the weedproof sheet is fixed can be made perpendicular to the slope, for example, by making the long cross-sectional shape L-shaped or heft-shaped It becomes easy to install at a predetermined angle such as parallel or perpendicular to the plane ahead of the shoulder or the plane ahead of the slope, and it is possible to easily fix the weedproof sheet in the middle of the slope.

  According to the weedproof structure of the present invention, its construction method, and the plate-like member, when fixing the upper end or lower end of the waterproof weedproof sheet to the slope in fill or cut, the slope of the slope is A grass-proof structure that reduces the labor required for excavation, prevents the excavated debris from falling, and prevents rainwater flowing on the surface of the slope from flowing into the lower part of the slope when fixing the upper end, its construction method, and plate shape A member can be provided.

It is the figure which showed the installation state of the weed prevention structure in the slope area of the embankment or cut according to 1st Embodiment of this invention, and its upper adjacent area, (a) is sectional drawing from a side surface, b) is a front view. It is the figure which showed the plate-shaped member which concerns on each embodiment of this invention, (a) is the bottom view seen from the slope side of an installation state, (b) is a side view of (a). It is sectional drawing from the side surface which expanded the periphery of a plate-shaped member, and the expansion of a plate-shaped member at the time of being embedded so that (a) may become a substantially perpendicular angle with respect to the normal surface of Fig.1 (a). It is sectional drawing, (b) is the state which penetrated the 1 or 2 sheet | seat prevention sheet | seat and the hole of a plate-shaped member in addition to FIG. It is an expanded sectional view of a plate-like member, and (c) is an enlarged sectional view of a plate-like member when the bending angle of the plate-like member is set to an obtuse angle so that the buried side region piece is at an angle substantially perpendicular to the ground surface. (D) is an enlarged cross-sectional view of the plate-like member when the plate-like member is embedded so as to be at an angle substantially perpendicular to the slope without bending the plate-like member, and (e) shows the plate-like member. It is an expanded sectional view of the plate-shaped member when it is embedded so as to be at an angle substantially perpendicular to the ground surface when it is embedded without bending. FIG. It is the figure which showed the installation state of the weed protection structure in the slope area of the embankment or cut according to 2nd Embodiment of this invention, and its lower adjacent area, (a) is sectional drawing from a side surface, (B) is a front view. It is sectional drawing from the side surface which expanded the periphery of a plate-shaped member, and the expansion of the plate-shaped member at the time of embedding so that (a) may become a substantially perpendicular angle with respect to the normal surface of Fig.4 (a). It is sectional drawing, (b) is the state which penetrated the 1 or 2 sheet of grass prevention sheets and the hole of a plate-shaped member in addition to FIG. It is an expanded sectional view of a plate-shaped member, and (c) is an enlarged cross-sectional view of the plate-shaped member when the bending angle of the plate-shaped member is set to an obtuse angle so that the buried side region piece has an angle substantially parallel to the ground surface. (D) is an enlarged cross-sectional view of the plate-like member when the plate-like member is embedded so as to be at an angle substantially perpendicular to the slope without bending the plate-like member, and (e) shows the plate-like member. It is an expanded sectional view of the plate-shaped member when it embeds so that it may become a substantially parallel angle with respect to the earth surface when it embeds all without bending. It is the figure which showed the installation state of the weed prevention structure which does not cover an upper adjacent area and a lower adjacent area in the middle area of the banking or cutting slope area which concerns on 3rd Embodiment of this invention, (a) Is a sectional view from the side, and (b) is a front view. Using the plate-like member that is not bent and whose long side dimension is equal to or less than the short side dimension of the weedproof sheet, it is attached to the adjacent plate-like member among the portions protruding from the short side of the plate-like member in the weedproof sheet. It is the figure which showed the state which cut off a part of folding | turning part of a possible part.

<First Embodiment>
A first embodiment of a weedproof structure, a construction method thereof, and a plate-like member of the present invention will be described in detail with reference to the drawings.

The structure and construction method of the weed protection structure of the first embodiment will be described with reference to FIGS. 1 (a), (b), FIG. 2, FIG. 3 (a) and FIG.
The weed prevention structure 1 of this embodiment is formed based on the modified asphalt type weed prevention sheet 10, and the lower end 13 is fixed to the slope area 30 in the embankment or cut 9.

  As shown in FIG. 1 (a), the weedproof structure 1 of the present embodiment has a structure in which a plurality of weedproof sheets 10 are connected by a sheet overlapping fusion part 11. In this way, by using the sheet overlap-bonding portion 11 of a plurality of the weedproof sheets 10 of appropriately selected dimensions by using the heat fusion method or the tape bonding method, the weedproof structure 1 of the present invention can be arbitrarily selected. It can be installed in accordance with the slope area 30 and the shoulder adjacent area. The grass protection structure 1 according to the present invention is a place where grass protection is necessary, such as roads, railways, rivers, parks or afforestation grounds, and the surrounding ground, surfaces, slope areas 30 and shoulder adjacent areas. Any place can be used.

  Moreover, the weedproof structure 1 can be produced by cutting and arranging the weedproof sheets 10 in accordance with the shape of the weedproof area using, for example, a waterproof grassproof sheet 10 having a predetermined size. If there are gaps between the plurality of grass protection sheets 10, plants may penetrate from there, so the opposing ends of each grass protection sheet 10 are fused or bonded together. Specifically, in the weedproof structure 1, the end portion of one weedproof sheet 10 that overlaps another adjacent weedproof sheet 10 is fused to the weedproof sheet 10, bonded by an adhesive, and both sides. Using at least one of adhesive bonding, for example, fixing to a range of areas where it is necessary to prevent grass growth on the sloped area 30 of the embankment or cut 9 and the area adjacent to the shoulder. Is formed. Construction of the weedproof structure 1 can be facilitated by using the plurality of weedproof sheets 10.

  Further, for example, when the width of the slope area 30 and the shoulder adjacent area is narrower than the grass protection sheet 10, that is, when the width of the slope area 30 and the shoulder adjacent area is generally about 1 m or less, one sheet The herbicidal structure 1 can be installed using the tape-shaped weedproof sheet 10.

  The tape bonding method is a method in which an asphalt tape having adhesiveness on both sides is inserted between an end portion and a surface to be bonded, and the end portion and the surface to be bonded are fixed. When the use of fire is restricted, such as when installed near residential areas or when there are many flammable materials such as undergrass near the installation location, the grass protection sheet 10 should be fixed using the tape bonding method. Is preferred.

  More specifically, the grass protection structure 1 according to the present embodiment is necessary, for example, so as to match the shape of the laying place on the sloped area 30 and the shoulder adjacent area in the deposited embankment or cut 9. Accordingly, the waterproof grassproof sheet 10 is arranged so as to be adjacent to each other with an overlap margin of 50 mm to 200 mm. In the case of fusion, the end portion of the sheet overlap fusion portion 11 which is the overlap margin is melted by a torch burner and then solidified to form the herbicidal structure 1 by heat fusion. It is constructed like this. In addition, in the case of bonding, between the ends of the overlap allowance, a tape having an adhesive self-adhesive layer (for example, a special rubberized asphalt adhesive layer) is inserted between both ends, and bonded by rolling. It is constructed so as to form the herbicidal structure 1.

  Thus, by making the weedproof sheet 10 into an asphalt system, not only adhesion or fusion of the sheets when forming the weedproof structure 1 is facilitated, but also when fixing each weedproof sheet 10. Fusing or bonding to structures such as side grooves can be facilitated just by heating or rolling pressure

  Further, as a method of fixing each of the grass protection sheets 10 of the grass protection structure 1 on the area adjacent to the shoulder, in addition to the method of fusing or bonding the end of the grass protection sheet 10 to the structure, embankment Or you may fix the edge part of the one weed prevention sheet | seat 10 with the 2nd nail-like instrument 15 etc. which are mentioned later to the cut 9. Moreover, when joining the edge part of the other grass protection sheet 10 to the fixed edge part of the one grass protection sheet 10, the edge part of the other grass protection sheet 10 adjacent to the edge part is piled up, The overlapping portion may be fixed by fusion or adhesion.

  The reason why the waterproof herbicidal sheet 10 is used in the present embodiment is that moisture is necessary for the growth of the plant. Therefore, at least of rainwater that pours into the slope area 30 or the shoulder area of the embankment or cut 9 This is to reduce the growth of plants under the weedproof sheet 10 by reducing the rainwater falling on the waterproof weedproof sheet 10 and penetrating into the embankment or cut 9.

  However, even when the waterproof grassproof sheet 10 is used for the grassproof structure 1, rainwater may enter through the gaps between the grassproof sheets 10. Therefore, in the weedproof structure 1 of the present embodiment, the sheet end portion is continuously fused or bonded to the end portion of the adjacent sheet without any gap, so that water can be removed from the overlapping gap between the plurality of waterproof sheets. Is prevented from entering, and the growth of plants under the herbicidal sheet 10 is suppressed. In addition, in order to make the overlapping margin waterproof more complete, the overlapping margin gap may be filled with, for example, a caulking material or a sealing material (sealant) containing silicon as a component to eliminate the gap.

  The embankment or cut 9 is formed by depositing debris by civil engineering work, for example, for laying main roads, highways, railway tracks and the like. In this case, the upper surface of the embankment or cut 9 is a flat surface, and roadbeds for laying roads and tracks are provided, and side grooves (for example, drainage) for drainage are provided at the ends along the roads and tracks. A structure such as an upper structure 21) such as a U-shaped groove is provided.

  The herbicidal sheet 10 is a modified asphalt type herbicidal sheet having a predetermined size such as 1 m × 10 m, for example, according to the range of the weeding area on the slope area 30 and the area adjacent to the shoulder, as necessary. And the overlap margin is heat-sealed or bonded. The weedproof sheet 10 of this embodiment is a modified asphalt-based weedproof sheet 10 having waterproofness. Therefore, since the herbicidal structure 1 is waterproof, the growth of the plant can be suppressed by reducing the supply of moisture to the seeds and roots of the plant in the embankment or cut 9. In addition, the dimension of the weed prevention sheet | seat 10 can be suitably selected according to the dimension of the slope area 30 and the shoulder adjacent area, and other construction conditions.

  The sheet overlapping fusion part 11 is provided at a side end portion along the vertical direction of the slope area 30 and the shoulder adjacent area in the grass prevention structure 1, and is also a side edge part of each grass prevention sheet 10. In order to suppress the invasion of wind and rain, along the end portion, the portion to be fixed at the end portion is folded into a groove excavated with a dimension that can be embedded, and along the end portion of the weedproof sheet 10, the second portion is fixed. The nail-like instrument 15 is penetrated at least through the grass protection sheet 10 and intermittently driven into the slope area 30 and the shoulder adjacent area, so that the edge of the grass protection sheet 10 is the slope area of the embankment or cut 9. 30 and fixed at the shoulder adjacent area.

  In the weedproof sheet 10 of the present embodiment, the lower end portion 13 is attached to the flat surfaces 41, 42, and 48 of the plate-like member 40. The plate-like member 40 to which the herbicidal sheet 10 is attached may have a rectangular shape with a rectangular cross section, an L shape with a cross sectional shape, or a round shape. By making the cross-sectional shape of the plate-like member 40 L-shaped or U-shaped, the plate-like member 40 to which one end 13 of the herbicidal sheet 10 is fixed is changed to the long side of the plate-like member 40. The edge (end) on the release end 47 side is directed to a slope at a predetermined angle, for example, a predetermined angle 81 perpendicular to the slope area 30, or substantially parallel to a plane ahead of the shoulder or a plane ahead of the slope. Or it becomes easy to install at the predetermined angle 82 such as substantially vertical, and it is possible to easily fix the grass protection sheet 10 in the middle of the slope area 30.

  The upper end portion 12 is an upper side end portion of the slope area 30 and the shoulder adjacent area in the grass prevention structure 1, and is also an upper side end portion of each grass prevention sheet 10. The upper end 12 can be fixed by being fused or bonded to the upper structure 21 such as a U-shaped groove with a predetermined width. As a fixing method, the upper end portion 12 covers the exposed area of the partial structure 21 with a width of, for example, 100 mm or more. The covering width may be, for example, 200 mm, 300 mm, or 400 mm as long as it is 100 mm or more. And the upper-end part 12 part is fixed by melt | fusion or adhesion | attachment.

  The lower end portion 13 is a lower side end portion of the grass protection structure 1 laid in the slope area 30, and is also a lower end portion of each grass protection sheet 10. In the present embodiment, the lower end portion 13 is fixed to the slope area 30 of the embankment or cut 9. As a fixing method, the lower end portion 13 is attached to the flat surfaces 41, 42, and 48 of the plate-like member 40, and the edge (on the release end 47 side of the long side in the plate-like member 40 to which the weedproof sheet 10 is attached ( The edge is embedded at a predetermined angle 81 toward the slope area 30. When attaching the weedproof sheet 10 to the plate-like member 40, as shown in FIG. 7, the lower end portion 13 of the weedproof sheet 10 is folded so that the end 47 of the long side of the plate-like member 40 is wound. The contact portion between the weedproof sheet 10 and the plate-like member 40 is fused or bonded, and the weedproof sheet 10 is fixed to the plate-like member 40.

  The plate-like member 40 to be embedded is provided with holes 43, 44, 45, 46 having a diameter D 1 larger than the diameter of the second nail-like instrument 15. The holes 43 and 45 are provided in the region piece 40a on the grass prevention sheet 10 side, and the holes 44 and 46 are provided on the region piece 40b on the release end 47 side. The plate-like member 40 can be fixed by driving the second nail-like instrument 15 into the holes 44 and 46 after the area piece 40b on the release end 47 side is embedded.

  The first nail-like instrument 14 is a nail-like instrument that is driven into and fixed to a concrete structure. For example, a concrete screw, a combination of a screw and a nylon plug, a plug anchor, a screw, a nylon plug, and a fixing disk. And the like. In order to fix the weedproof sheet 10 to the side groove (upper structure), the first nail-like instrument 14 is driven by drilling through the weedproof sheet 10 using a drill or the like. When using a plug, insert the plug first and then drive a screw or the like with a hammer or screw with a screwdriver. As a use interval of the first nail-like instrument 14, it is used intermittently, for example, every 0.45 m along the formation direction of the upper end face of the upper structure 21. By fixing with the additional first nail-like instrument 14 in this way, it is possible to more reliably fix the grass protection sheet 10 to the upper end portion 12.

  Further, as the first nail-like instrument 14, an all anchor, a concrete nail, a surveying nail, or the like can be used. The all anchor is an anchor in which an anchor body, a driving pin, a nut and a washer are set. As an example of the all anchor, one having a diameter of 5 mm and a length of 30 mm can be used. Further, in order to ensure fixing by the all anchor, an all anchor disk (for example, a thickness of 1.2 mm and a diameter of 45 mm) can be used. Moreover, it is preferable to use an automatic nail driver in order to efficiently fix the concrete nails.

  The second nail-like instrument 15 is a nail or peg buried in the soil, and has a head that can be easily driven by a hammer such as an L-shape or a T-shape by bending or metal processing. The tip is pointed so that it can easily sink into the soil, and the body portion has a linear shape or an irregular shape such as a ball shape or a spiral shape. Moreover, as an example of the dimension of the L-shaped pin as the second nail-like instrument 15, one having a diameter of 9 mm and a long side length of 200 to 300 mm can be used. For example, the second nail-like instrument 15 is configured such that the sheet overlap fusion part 11 in the lateral direction of the grass prevention sheet 10 is moved along the sheet overlap fusion part 11 with respect to the slope area 30 and the shoulder adjacent area. Then, the weedproof sheet 10 is driven through at intermittent intervals. Thereby, the weedproof sheet 10 can be fixed to the slope area 30 and the shoulder adjacent area of the embankment or cut 9. In this way, by fixing the sheet overlap fusion part 11 of the weedproof sheet 10 to the slope area 30 and the shoulder adjacent area with the second nail-like instrument 15, the floating of the weedproof sheet 10 due to wind is suppressed. Can do.

  The sheet overlap fusion part 11 is a part of each side edge of each herbicidal sheet 10 that is continuously fused or bonded without gap to the side edge of the adjacent sheet, and overlaps 50 mm to 200 mm. It is a part to be a generation. For example, by overlapping and welding 100 mm, water does not enter from the gap where the plurality of waterproof sheets overlap, and the growth of plants under the herbicidal sheet 10 can be suppressed. Also, in order to make the waterproof property of the overlap (overlap allowance) more complete, even if the overlap allowance is filled with, for example, a caulking material or sealant containing silicon as a component, the gap is eliminated. Good.

  When the weedproof sheet 10 is fixed to the upper structure 21 such as a U-shaped groove, in addition to the above fusion or adhesion, the first nail-like instrument 14 that is driven through the weedproof sheet 10 is It can fix more reliably by using and fixing as an additional fixing means intermittently along the formation direction of the upper structure 21.

  The slope area 30 is an oblique slope portion of the embankment or cut 9, and the weedproof structure 1 of the present embodiment is disposed on the entire portion or on the lower side (slope side).

  For example, when the plate-like member 40 of the present embodiment is a steel material having a thickness of 3 mm, the length L1 of the long side is 900 mm, the width L2 of the region piece 40a on the weedproof sheet 10 side is 40 mm, and the release end 47 side The width L3 of the area piece 40b is 40 mm, the distance L4 between the hole 43 and the hole 45 is 450 mm, which is the same as the distance L4 between the hole 44 and the hole 46, and the distance L5 from the end of the area piece 40b to the hole 43 is 275 mm. The distance L6 from the end of the region piece 40a to the hole 43 can be 50 mm, and the diameter D1 of the holes 43, 44, 45, 46 can be 15 mm.

  The plate-like member 40 can also be made of FRP (fiber reinforced plastic). As fibers, those using inexpensive glass fibers, carbon fibers for obtaining strength, and those using aromatic polyamide (aramid) fibers such as Kepla (registered trademark) for obtaining strength are known. It has been. In this case, for example, when the material is FRP having a thickness of 3 mm, the length L1 of the long side is 900 mm, the width L2 of the region piece 40a on the grass protection sheet 10 side is 60 mm, and the width L3 of the region piece 40b on the release end 47 side. 30 mm, and the remaining L4 to L6 and D1 can be the same as described above. Further, the width L2 of the region piece 40a is not limited to 60 mm, and may be, for example, 75 mm.

  The area piece 40a is an area piece on the side where the majority of the weedproof sheet 10 of the plate-like member 40 is present. The area piece 40 b is an area piece on the release end 47 side of the plate-like member 40, and this area piece is embedded in the slope area 30. The flat surface 41 is an outer flat surface in the region piece 40a on the grassproof sheet 10 side of the plate-like member 40 bent in an L-shaped cross section. The flat surface 42 is an outer flat surface in the region piece 40b on the release end 47 side of the plate-like member 40 bent in an L-shaped cross section.

  The plate-like member 40 is installed so that the edge of the region piece 40b on the release end 47 side of the long side is buried at a predetermined angle 81 toward the slope area 30. According to the construction method of the weedproof structure 1 of the present embodiment, the weedproof sheet 10 fixes the plate-like member 40 to the end 13 side which is one end thereof, and is at a predetermined angle 81 with respect to the slope area 30. By being installed, the grass protection sheet 10 can be easily fixed to the upper and lower intermediate regions of the slope area 30.

  When attaching the weedproof sheet 10 to the plate-like member 40, the end portion 13 of the weedproof sheet 10 is folded back and attached to the end 47 of the long side of the plate-like member 40, and the end portion 13 is adhered or bonded. Fuse. By attaching the weedproof sheet 10 so as to be wound around the plate-like member 40, the attachment strength of the weedproof sheet 10 to the plate-like member 40 can be improved. Moreover, since the front-end | tip part 13 attached so that it winds may become extraction resistance like an anchor in the soil of the slope area 30, fixation to the slope area 30 can be strengthened.

  Further, by attaching or fusing one end of the weedproof sheet 10 to the plate-like member 40, the attachment of the weedproof sheet 10 to the plate-like member 40 becomes easy. The attachment of the weedproof sheet 10 so as to be wound around the end 47 of the long side of the plate-like member 40 is, for example, that the weedproof is first applied to the flat surface 48 inside the region piece 40b on the release end 47 side of the plate-like member 40. The end portion 13 of the sheet 10 is aligned and fused or bonded so as to be parallel to the long side direction, and the remaining grass protection sheet 10 is attached to the release end 47, the flat surface 42 outside the region piece 40b, and the grass protection sheet 10 side. In other words, the flat surface 41 of the region piece 40a is fused or bonded in this order, or conversely, starting from the flat surface 41, the flat surface 42, the release end 47, and the flat surface 48 are fused or bonded in this order.

  The plate-like member 40 has a shape that is bent into an L-shaped cross section by a bent portion along the long side of the dimension L1 and divided into two region pieces 40a and 40b each having a flat surface (41 and 42). The plate-like member 40 to which the weedproof sheet 10 is attached has the area piece 40b on the release end 47 side set at a predetermined angle 81 toward the slope area 30, and the area piece 40a on the grassproof sheet 10 side is the slope area. 30 in parallel. The bent plate-like member 40 is used, and the region piece 40b on the release end 47 side of the bent plate-like member 40 is installed at a predetermined angle 81 with respect to the slope area 30, so that the grass prevention sheet 10 is plate-like. Since it is not bent at the edge of the member 40, the deterioration of the weedproof sheet 10 is reduced, and the fixing strength of the weedproof sheet 10 to the slope area 30 is also improved.

  The plate-like member 40 is used in the construction method described above, and the long side dimension L1 is equal to or smaller than the short side dimension of the weedproof sheet 10. In the plate-like member 40, by setting the long side dimension L1 to be equal to or less than the short-side dimension of the weedproof sheet 10, the plate-like member 40 can be easily fixed to the one end portion 13 of the weedproof sheet 10, and the adjacent Since the next plate-like member 40 adjacent to the grass sheet 10 can be easily fixed, and the installation of the predetermined angle 81 to the slope area 30 is facilitated, Fixing of the weedproof sheet 10 can be facilitated.

  The plate-like member 40 has a long side dimension L1 that is equal to or smaller than the short side dimension of the weedproof sheet 10, and is a sheet that is an overlap margin with the adjacent weedproof sheet 10 from the short side dimension of the weedproof sheet 10. It is below the dimension excluding the overlapping fusion part 11. When the weedproof sheet 10 is attached to the plate-like member 40, the individual plate-like member 40 is attached to each of the weedproof sheets 10 while providing the sheet overlapping fusion part 11 of the adjacent weedproof sheet 10. The long side of the dimension L1 of the plate-like member 40 is set to be equal to or smaller than the short side dimension of the weedproof sheet 10 and further to a dimension equal to or smaller than the dimension of the short side dimension of the weedproof sheet 10 excluding the dimension of the sheet overlapping fusion part 11. Thus, the plate-like member 40 can be attached to each of the weedproof sheets 10 while providing the sheet overlapping fusion part 11 between the adjacent weedproof sheets 10, and the construction becomes easy.

  The plate-like member 40 has a diameter D1 equal to or larger than the diameter of the nail-like instrument 15 into two region pieces 40a and 40b in which flat surfaces (41 and 42) are divided by a bent portion formed in a direction along the long side of the dimension L1. Have holes 43, 44, 45, 46. After the plate-like member 40 to which the weed-proof sheet 10 is attached is installed in the slope area 30, the nail-like instrument 15 penetrates the holes 43, 44, 45, 46 of the grass-proof sheet 10 and the plate-like member 40. Then, it is placed in the slope area 30. The plate-like member 40 has holes 43, 44, 45, 46 for the nail-like instrument 15, and the plate-like member 40 is driven into the slope area 30 with the nail-like instrument 15, thereby Fixing strength can be improved.

  The plate-like member 40 has holes 43, 44, 45, 46 for the nail-like tool 15 in at least the sheet overlap fusion part 11 of the adjacent herbicidal sheets 10, and the nail-like tool 15 is in the slope area 30. In the case of placing, the nail-like instrument 15 is placed in the slope area 30 by penetrating through the overlapping welded portions 11 of the adjacent herbicidal sheets 10 and the holes 43, 44, 45, 46 of the plate-like member 40. To do. The hole 43 for the nail-like instrument 15 is provided in the sheet overlap fusion part 11 of the weedproof sheet 10. Thereby, by placing the sheet overlap fusion part 11 of the plate-like member 40 on the slope area 30 with the nail-like instrument 15, the sheet overlap fusion part 11 has a double thickness, It is possible to make it difficult to generate cracks in the weedproof sheet 10 at the fixed portion of the weedproof sheet 10 by the nail-like instrument 15. Moreover, the fixing strength of the weedproof sheet 10 can be improved. In addition, the connection between the respective weed prevention sheets 10 is not only bonded or fused, but a mechanical connection by a needle-like instrument is added, so that the connection strength is increased and the integrated strength as the weed prevention structure 1 is improved. Can be made.

  When the plate-like member 40 to which the herbicidal sheet 10 is attached is installed in the slope area 30, a groove having a size capable of embedding the region piece 40b on the release end 47 side of the plate-like member 40 is dug in advance, The plate-like member 40 to which the sheet 10 is attached may be embedded. By digging a groove in advance and embedding the region piece 40b on the release end 47 side of the plate-like member 40, it is possible to ensure the fixing of the weedproof sheet 10 to the upper and lower intermediate regions of the slope area 30.

  In the case of digging a groove of a size that can embed the region piece 40b on the release end 47 side of the plate-like member 40 in advance, a tool having rotating teeth such as a diamond cutter may be used to form the groove. Good. Growing can be facilitated by using a tool having rotating teeth capable of forming narrow grooves for grooving.

  When a groove having a dimension capable of embedding the region piece 40b on the release end 47 side of the plate-like member 40 is dug in advance, the groove may be formed along the end portion 13 using a scoop-like tool. Grooving can be facilitated by using a scoop-like tool for narrow grooves for grooving.

  In the case of digging a groove having a dimension capable of embedding the plate-like member 40 in advance, a plate-like body having a thickness and a length dimension equal to or greater than those of the plate-like member 40 is formed in the slope area 30 in advance to form the groove. A groove may be formed by driving. Growing can be facilitated by forming a groove by previously driving a plate-like body (plate-like member 40) that has been processed into a shape that can be pierced with earth and stone such as sharpening the tip of the groove.

  When the plate-like member 40 to which the weedproof sheet 10 is attached is installed in the slope area 30, the plate-like member 40 to which the weedproof sheet 10 is attached has a region piece 40b on the open end 47 side as a slope. It may be placed so as to be buried in the area 30. The man-hour at the time of laying the weedproof sheet 10 can be reduced by suddenly driving the region piece 40b on the release end 47 side of the plate-like member 40 without digging a groove.

  Before and after the step of attaching the end portion 13 of the weedproof sheet 10 to the plate-like member 40, one of the portions attached to the adjacent plate-like member 40 among the portions of the weedproof sheet 10 that protrude from the short side of the plate-like member 40. The part may be excised. Connection of the weedproof sheet 10 can be facilitated by cutting off a part of the portion of the weedproof sheet 10 attached to the adjacent plate member.

  The part of the part attached to the plate-like member 40 is a part of the folded part 71 to be deleted. Of the portions attached to the adjacent plate member 11 in the weedproof sheet 10, only a part of the folded portion 71 is cut out, so that the decrease in the strength of the weedproof sheet 10 is minimized and the weedproof sheet 10 Connection can be facilitated.

  As shown in FIG. 7, the folded portion 71 is an adjacent plate-like member among the portions protruding from the short side of the plate-like member in the grass-proof sheet when the grass-proof sheet 10 is attached so as to be wound around the plate-like member 40. This is a part that is cut off from the part that can be attached to the end of the release end 47 before the return end 47 is folded back.

  The predetermined angle 81 is an angle formed by the region piece 40a on the grass prevention sheet 10 side and the region piece 40b on the release end 47 side in the plate-like member 40 bent in an L-shaped cross section, and is a right angle in the present embodiment. . The area piece 40b is embedded in such a way that the area piece 40b is at an angle in the vertical direction from the surface of the slope area 30 with the release end 47 side as the head, and the area piece 40a is parallel to the surface of the slope area 30.

  The case of FIG. 3B is different from the case of FIG. 3A in that the second nail-like instrument 15 is driven and fixed also to the region piece 40a on the grass prevention sheet 10 side. ing. By driving the second nail-shaped instrument 15 in a plurality of directions in this way, the second nail-shaped instrument 15 is more difficult to come out, and the fixing of the weedproof structure 1 can be further strengthened.

  The plate-like member 50 in FIG. 3C is a member having a predetermined angle 82 different from that of the plate-like member 40. The predetermined angle 82 is an angle formed by the region piece 50a on the grass prevention sheet 10 side and the region piece 50b on the release end 57 side in the plate-like member 50 bent in a shape of a cross section. The obtuse angle of the region piece 50b is an angle substantially perpendicular to the ground surface. In the embedding process, the area piece 50b is left at the opening end 57 side as the head, and the area piece 50b is at an angle substantially perpendicular to the ground surface from the surface of the slope area 30, and the area piece 50a is parallel to the surface of the slope area 30. Buried to be.

  The area piece 50a is an area piece on the side where the majority of the weedproof sheet 10 of the plate-like member 50 is present. The area piece 50 b is an area piece on the release end 57 side of the plate-like member 50, and the area piece on this side is embedded in the slope area 30. The flat surface 51 is an outer flat surface in the region piece 50a on the grassproof sheet 10 side of the plate-like member 50 bent in a shape of a cross section. The flat surface 52 is an outer flat surface in the region piece 50b on the release end 57 side of the plate-like member 50 bent in a shape of a cross section.

  The plate-like member 60 in FIG. 3D is a flat plate-like member that is not bent unlike the plate-like members 40 and 50, and is obtained by separating only the region piece 40b of the plate-like member 40, for example. . In the present embodiment, the flat plate-like member 60 having no bent portion is embedded at a predetermined angle 81 perpendicular to the slope area 30. Thus, even if it is the flat plate-shaped member 60 which does not have a bending part, this invention can be implemented.

  Unlike the plate members 40 and 50, the plate member 60 shown in FIG. 3E is a flat plate member that is not bent. For example, only the region piece 40b of the plate member 40 is separated. . In the present embodiment, the flat plate-like member 60 that does not have the bent portion is embedded at a predetermined angle 82 that is substantially perpendicular to the plane ahead of the shoulder or the plane beyond the hip. Thus, in this embodiment, even a flat plate-like member having no bent portion can be implemented.

  In this embodiment, the modified asphalt type is used as the weedproof sheet 10, but the present invention is not limited to this, and may be appropriately selected from commercially available waterproof herbicidal sheets. An effect can be obtained. However, in particular, those having flexibility, waterproofness and light shielding properties and having a sheet-like shape can be suitably used because they have good durability. As a specific example of the herbicidal sheet 10 used in the present invention, a modified asphalt type herbicidal sheet 10 having excellent flexibility, waterproofness and light-shielding property, for example, JP-A-2002-272348 (Patent Document 1). The disclosed modified asphalt type herbicidal sheet 10 can be preferably used.

  The “modified asphalt-based herbicidal sheet 10” refers to a herbicidal sheet 10 containing modified asphalt as a material. Specifically, the modified asphalt may be the same as the modified asphalt that can be used for the (b) modified asphalt layer and (d) modified asphalt layer of the penetration-proof grass protection sheet described later. it can. As the modified asphalt-based herbicidal sheet 10, not only a sheet composed of a single modified asphalt but also a structure including a base material layer composed of a nonwoven fabric or the like between two modified asphalt layers may be used. it can.

  Further, the modified asphalt-based herbicidal sheet 10 can further include a front surface layer and a back surface layer. The surface layer can be the same as the (a) surface layer of the penetration-proof grass protection sheet described later. Moreover, a synthetic resin film can be used suitably for a back surface layer. As the synthetic resin film, specifically, a film selected from an HDPE film (high density polyethylene) and an OPP film (biaxially stretched polypropylene) can be suitably used. Moreover, the same thing as the (e) back surface layer of the penetration-proof type weedproof sheet mentioned later can be used.

  An example of the structure of the modified asphalt herbicidal sheet 10 is a structure having a surface layer, a modified asphalt layer, a base material layer, a modified asphalt layer, and a back surface layer in this order, but includes all of these layers. There is no need, and additional layers can be included.

  Moreover, the modified asphalt type grass prevention sheet | seat 10 is used as the material of the grass prevention sheet | seat 10 used for the grass prevention structure body 1 of this invention, and the method of the upper structure 21, such as a U-shaped groove | channel, is used for the edge part by the heat fusion method It is preferable to fix to the surface side wall 26. By using the heat-sealing method, the adhesion / fixing between the grass-proof sheet 10 and the upper surface near the exposed portion of the box culvert 21 and the side wall 26 of the upper surface 21 of the upper structure 21 such as a U-shaped groove is further ensured. This is because the generation of the gap can be surely prevented.

  In addition, as the herbicidal sheet 10 included in the herbicidal structure 1 of the present invention, one of the modified asphalt-based herbicidal sheets 10, which has excellent resistance to penetration of hard and sharp weed buds against the herbicidal sheet 10. It is particularly preferable to use a penetration type weedproof sheet.

<Penetration-proof grass protection sheet>
The penetration-proof weedproof sheet comprises (a) a surface layer containing inorganic particles or a synthetic resin containing inorganic particles, (b) a modified asphalt layer, (c) a base material layer, (d) a modified asphalt layer and ( e) a penetration-proof weedproof sheet in which at least 5 layers of a back surface layer containing a synthetic resin or a synthetic resin containing inorganic particles are laminated in this order, wherein (c) the base material layer is a woven fabric, a knitted fabric and A core sheath comprising a base material A which is at least one selected from the group consisting of non-woven fabrics and a base material B having a scrim, wherein the woven fabric, knitted fabric and non-woven fabric of the base material A have a core portion and a sheath portion. It is a penetration-proof herbicidal sheet comprising fibers having a structure, a core having a melting point of 200 ° C. or higher and a sheath having a melting point of 200 ° C. or higher, and (e) a synthetic resin for the back layer being a hard synthetic resin. .

The preferable aspect of a penetration-proof grass prevention sheet is shown below. In the penetration-proof weedproof sheet, these modes can be combined as appropriate.
(E) The hard synthetic resin of the back layer is at least one synthetic resin selected from the group consisting of polypropylene, polyester, polycarbonate, polyamideimide, polyesterimide, polyamide, polyimide, polyvinyl chloride and polyhalogenated polyvinyl.
(2) (e) The back layer is a biaxially stretched polypropylene film having a thickness of 10 to 50 μm.
(3) (c) The base material layer has a three-layer structure in which the base material A, the base material B, and the base material A are laminated in this order and adhered or heat-sealed.
(4) The core part and the sheath part are heat-sealed.
(5) The base material B has two or more sets of fiber bundles of a plurality of high-strength fibers that are parallel to each other at approximately equal intervals, and the different sets of fiber bundles cross each other at substantially equal angles. It is.
(6) At least a part of the contact portion between the base material A and the base material B is bonded or thermally fused with a resin having a melting point of 200 ° C. or higher and / or an adhesive that does not thermally decompose at 200 ° C. Yes.
(7) (c) The base material layer has a basis weight of 75 to 500 g / m ² .
(8) (a) The surface layer contains at least one or more flat inorganic particles selected from the group consisting of natural slate, talc and mica.

  Further, the penetration-proof grass protection sheet can be used for the grass protection structure 1 in which the grass protection sheet 10 is laid.

<Effect of penetration-proof grass protection sheet>
To prevent grass growth on the ground, surface, especially in the slope area 30 and the shoulder adjacent area, such as roads, railroads, rivers, parks, or afforestation gardens, and their surroundings, with a penetration-proof grass protection sheet Thus, it is possible to obtain the herbicidal sheet 10 having light shielding properties, excellent weather resistance, mechanical properties, and water impermeability, and also excellent in preventing penetration of hard and sharp weed buds.

<Modified asphalt of (b) layer and (d) layer>
As the modified asphalt of the (b) layer and the (d) layer, those containing asphalt and polymer, those containing three components of asphalt, polymer and inorganic filler can be used. As the modified asphalt of the (b) layer and the (d) layer, it is preferable to use those containing 10 to 40 parts by weight of the polymer and 0 to 20 parts by weight of the inorganic filler with respect to 100 parts by weight of the asphalt.

  As the modified asphalt, it is possible to use one prepared by heat mixing at 120 to 200 ° C. for 3 to 30 hours, including one containing asphalt and polymer, one containing three components of asphalt, polymer and inorganic filler. It is preferable because it is excellent in moisture resistance, stretchability and the like.

  In addition to the components described above, modified asphalt includes process oil, petrolatum, ceresin, petroleum resin, and other water repellents, pigments, thickeners, light-proofing agents, and weathering agents that are commonly used in blending synthetic resins and rubbers. An inorganic or organic compounding agent such as may be added.

  In the modified asphalt of the (b) layer and the (d) layer, the asphalt may be natural asphalt, natural asphalt, petroleum asphalt such as straight asphalt, blown asphalt, cutback asphalt, or these asphalts. A mixture or the like is preferred.

  In the modified asphalt of the (b) layer and the (d) layer, polymers include natural rubber, synthetic rubber, a mixture of natural rubber and synthetic rubber, polyethylene, ethylene vinyl acetate copolymer, ethylene and acrylic acid derivatives. Copolymer, polypropylene, polybutene-1, poly-4-methylpentene-1, polystyrene, acrylonitrile / styrene copolymer, ABS resin, polyvinyl chloride, polyacrylonitrile, polymer of styrene and butadiene (for example, SBS, SBR etc.) can be used. A rubber system such as SBS is particularly suitable.

  In the modified asphalt of the (b) layer and the (d) layer, as the inorganic filler, calcium carbonate, magnesium silicate, calcium silicate, aluminum silicate, anhydrous silicic acid, clay, carbon black, talc, mica, sulfuric acid Particulate inorganic fillers such as barium, diatomaceous earth, and silica, and fibrous inorganic fillers such as asbestos and glass fibers can be used.

  The modified asphalt of the (b) layer and the (d) layer has a penetration of preferably 10 dmm to 200 dmm, more preferably 15 dmm to 100 dmm, more preferably 20 dmm to 50 dmm, and particularly preferably 25 dmm. The range of ˜35 dmm is preferable because of excellent flexibility.

  In the penetration-proof weedproof sheet, when the modified asphalt having the above composition is used as the (b) layer and the (d) layer, particularly when arranged in the slope area 30 and the shoulder adjacent area, the slope area. 30 and the upper part of the shoulder-adjacent area can form a layer with excellent water impermeability, not only can block moisture necessary for weed growth, but the slope area 30 and the shoulder-adjacent area are constructed with embankments. If it is, it concentrates by effectively preventing the aquifer of the slope area 30 and the shoulder adjacent area itself accompanying the infiltration of rainwater from the slope area 30 and the upper shoulder adjacent area (the shoulder). The slope of the slope area 30 and the shoulder adjacent area due to heavy rain can be avoided.

<Back layer>
As for a penetration-proof type weedproof sheet, the back surface layer includes synthetic resin or synthetic resin containing inorganic particles. (E) The back layer is preferably a synthetic resin film or a synthetic resin film containing inorganic particles.

  (E) The synthetic resin of the back layer is a hard synthetic resin. By using a film made of a hard synthetic resin as the back layer, it is possible to prevent weed buds such as chigaya from penetrating the (e) back layer of the penetration-proof weedproof sheet. In addition, taking advantage of the surface smoothness of the synthetic resin film, the growth direction of weed buds can be induced in a direction parallel to the back surface of the sheet.

  (E) As the synthetic resin of the synthetic resin film of the back layer, it is preferable to use a resin excellent in light resistance and weather resistance.

  (E) The back layer used for the penetration-proof grass protection sheet is preferably a hard synthetic resin film having a thickness of preferably 10 to 50 μm, more preferably 12 to 40 μm, and particularly preferably 15 to 30 μm. Can be used for (E) When the hard synthetic resin film as the back surface layer is thicker than the above range, the effect of preventing the penetration of chigaya buds through the penetration-resistant weedproof sheet is enhanced, but the flexibility of the penetration-resistant weedproof sheet May be damaged. For this reason, if a through-proof type weedproof sheet is manufactured and then packed into a roll, problems such as wrinkling on the sheet surface may occur, and workability during laying may be impaired in construction work. is there. Moreover, when the synthetic resin film of the (e) back surface layer is thinner than the said range, the effect which prevents a hard and sharp chigaya bud from penetrating a penetration-proof weedproof sheet becomes small. It is preferable that the hard synthetic resin film is within the above range because these problems do not occur.

  Thus, according to the weedproof structure of this embodiment, its construction method, and the plate-like member, when fixing the upper end or lower end of the waterproof weedproof sheet to the slope in the embankment or cut, the method It is possible to provide a weedproof structure, a construction method thereof, and a plate-like member that reduce the labor for excavating the surface debris and prevent the excavated debris from falling.

Second Embodiment
A second embodiment of the weedproof structure of the present invention, its construction method, and a plate-like member will be described in detail with reference to the drawings.
This will be described with reference to FIGS. 2 and 7 together with FIGS. 4 (a), 4 (b) and 5 (a).
The weed prevention structure of the second embodiment and its construction method are the weed prevention structure when the first embodiment lays the weed prevention structure from the shoulder to the middle of the slope, and the lower end of each of the weed prevention sheets. The second embodiment is a construction method for laying a weedproof structure from the bottom of the slope to the middle of the slope, and each of the weeds. It differs in that it is a construction method that fixes the upper end of the sheet to the middle region of the slope.

  Therefore, the lower end portion 13 is a lower side end portion of the slope area 30 and the rear end of the grass bottom structure in the weed prevention structure 1, and is also a lower side end portion of each grass prevention sheet 10. The lower end portion 13 can be fixed by being fused or bonded to the lower structure 22 such as a U-shaped groove with a predetermined width. As a fixing method, the lower end 13 covers the exposed area of the lower structure 22 with a width of, for example, 100 mm or more. The covering width may be, for example, 200 mm, 300 mm, or 400 mm as long as it is 100 mm or more. And the lower end part 13 part is fixed by melt | fusion or adhesion | attachment.

  The upper end portion 12 is an upper side end portion of the weed prevention structure 1 laid in the slope area 30 and is also an upper end portion of each weed prevention sheet 10. In the present embodiment, the upper end 12 is fixed to the slope area 30 of the embankment or cut 9. As a fixing method, the upper end portion 12 is attached to the flat surfaces 41, 42, and 48 of the plate-like member 40, and the end portion of the long side of the plate-like member 40 to which the weedproof sheet 10 is attached is on the release end 47 side. It is embedded at a predetermined angle 81 toward the slope area 30. When attaching the weedproof sheet 10 to the plate-like member 40, as shown in FIG. 7, the upper end portion 12 of the weedproof sheet 10 is folded back and the long-side end portion 47 of the plate-like member 40 is wound up. The contact portion between the weedproof sheet 10 and the plate-like member 40 is fused or bonded, and the weedproof sheet 10 is fixed to the plate-like member 40.

  In the case of this embodiment, by attaching the waterproof grassproof sheet 10 so as to be wound around the plate-like member 40, the attachment strength of the grass-proof sheet to the plate-like member can be improved, and fixing to the slope is possible. In addition to being able to strengthen, by embedding the upper end portion 12 of the weedproof sheet 10 in the slope area 30 in the lateral direction, the ground surface running rainwater flowing from the upper part of the slope area 30 to the surface layer is behind the weedproof sheet 10. Can be prevented from flowing into

  5 (b) is different from the case of FIG. 5 (a) in that the second nail-like instrument 15 is also driven and fixed to the region piece 40a on the weedproof sheet 10 side. ing. By driving the second nail-shaped instrument 15 in a plurality of directions in this way, the second nail-shaped instrument 15 is more difficult to come out, and the fixing of the weedproof structure 1 can be further strengthened.

  The plate-like member 50 in FIG. 5C is a member having a predetermined angle 82 different from that of the plate-like member 40 as described above with reference to FIG. The predetermined angle 82 is an angle formed by the region piece 50a on the grass prevention sheet 10 side and the region piece 50b on the release end 57 side in the plate-like member 50 bent in a shape of a cross section. The obtuse angle of the region piece 50b is an angle substantially parallel to the ground surface. In the burying process, the area piece 50b is kept at an angle that is substantially parallel to the ground surface from the surface of the slope area 30 with the area piece 50b as the leading end, and the area piece 50a is parallel to the surface of the slope area 30. Buried to be. The other plate-like members 50 are the same as those described above with reference to FIG.

  The plate member 60 of FIG. 5D is also a flat plate member that is not bent unlike the plate members 40 and 50 as described above with reference to FIG. Only the area piece 40b is separated. In the present embodiment, the flat plate-like member 60 having no bent portion is embedded at a predetermined angle 81 perpendicular to the slope area 30. Thus, even if it is the flat plate-shaped member 60 which does not have a bending part, this invention can be implemented.

  Unlike the plate members 40 and 50, the plate member 60 in FIG. 5E is also a flat plate member that is not bent, and for example, only the region piece 40b of the plate member 40 is separated. . In the present embodiment, the flat plate-like member 60 that does not have the bent portion is embedded at a predetermined angle 82 that is substantially parallel to the plane ahead of the shoulder or the plane beyond the tail. Thus, in this embodiment, even a flat plate-like member having no bent portion can be implemented.

  As described above, according to the weedproof structure, the construction method, and the plate-like member of the present embodiment, when fixing the upper end of the waterproof grassproof sheet to the slope in the embankment or cut, the slope of the slope , A construction method, and a board for preventing the fall of the excavated debris and preventing the rainwater flowing on the slope surface from flowing into the lower part of the seat when fixing the upper end, A shaped member can be provided.

<Third Embodiment>
A third embodiment of the weedproof structure of the present invention, its construction method, and a plate-like member will be described in detail with reference to the drawings.
This will be described with reference to FIGS. 2 and 7 together with FIGS. 6 (a), 6 (b), 3 (a) and 5 (a).
The grass protection structure of the third embodiment and its construction method are the grass protection structure when the first embodiment lays the grass protection structure from the shoulder to the slope, and the lower end of each grass protection sheet. In the middle area of the slope, and the second embodiment is a grass prevention structure in which the grass protection structure is laid from the slope to the middle of the slope. While the construction method is fixed to the middle area of the slope, the third embodiment has all the weed control structure in the middle of the slope, that is, when the top and bottom edges of the weed protection structure are laid on the slope. And the construction method which fixes the upper end part of each grass prevention sheet to the intermediate area of a slope.

  The upper end portion 12 is fixed to the slope area 30 of the embankment or cut 9 as in the second embodiment. As a fixing method, the upper end portion 12 is attached to the flat surfaces 41, 42, and 48 of the plate-like member 40, and the end portion of the long side of the plate-like member 40 to which the weedproof sheet 10 is attached is on the release end 47 side. It is embedded at a predetermined angle 81 toward the slope area 30. When attaching the weedproof sheet 10 to the plate-like member 40, as shown in FIG. 7, the upper end portion 12 of the weedproof sheet 10 is folded back and the long-side end portion 47 of the plate-like member 40 is wound up. The contact portion between the weedproof sheet 10 and the plate-like member 40 is fused or bonded, and the weedproof sheet 10 is fixed to the plate-like member 40.

  The lower end 13 is fixed to the slope area 30 of the embankment or cut 9 as in the first embodiment. As a fixing method, the lower end portion 13 is attached to the flat surfaces 41, 42, and 48 of the plate-like member 40, and the end portion on the release end 47 side of the long side in the plate-like member 40 to which the weedproof sheet 10 is attached. It is embedded at a predetermined angle 81 toward the slope area 30. When attaching the weedproof sheet 10 to the plate-like member 40, as shown in FIG. 7, the lower end portion 13 of the weedproof sheet 10 is folded so that the end 47 of the long side of the plate-like member 40 is wound. The contact portion between the weedproof sheet 10 and the plate-like member 40 is fused or bonded, and the weedproof sheet 10 is fixed to the plate-like member 40.

  In the case of this embodiment, by attaching the waterproof grassproof sheet 10 so as to be wound around the plate-like member 40, the attachment strength of the grass-proof sheet to the plate-like member can be improved, and fixing to the slope is possible. In addition to being able to strengthen, by embedding the upper end portion 12 of the weedproof sheet 10 in the slope area 30 in the lateral direction, the ground surface running rainwater flowing from the upper part of the slope area 30 to the surface layer is behind the weedproof sheet 10 Can be prevented from flowing into

1 herbicidal structure,
9 Filling or cutting,
10 Weedproof sheet,
11 Sheet overlap fusion part,
12 Upper end,
13 Lower end,
14 First nail-like instrument (nylon plug + disc),
15 Second nail-shaped instrument (L-shaped pin),
21 superstructure,
22 substructure,
30 Slope area,
40 (L-shaped cross section) plate member,
40a area piece (on the weedproof sheet 10 side of the plate-like member 40),
40b region piece (on the release end 47 side of the plate-like member 40),
41 a flat surface (outside of the region piece 40a),
42 a flat surface (outside of the region piece 40b),
47 Open end (of area piece 40b),
48 flat surface (inside the region piece 40b),
43 hole (in the overlapping portion of the region piece 40a),
44 hole (closer to the center of the region piece 40b),
45 hole (closer to the center of the region piece 40a),
46 hole (closer to the end of the region piece 40b),
50 (shape to cross section) plate-like member,
50a area piece (on the weedproof sheet 10 side of the plate-like member 50),
50b region piece (on the release end 47 side of the plate-like member 50),
51 a flat surface (outside the region piece 50a),
52 a flat surface (outside the region piece 50b),
57 Open end (of area piece 50b),
58 a flat surface (inside the region piece 50b),
60 plate-like member (flat without bending),
62 a flat surface (outside of the plate member 60),
67 Open end (of plate-like member 60),
68 a flat surface (inside the plate-like member 60),
L1 is the length of the long side (of the plate-like member 40),
L2 Width of the region piece 40a (on the weedproof sheet 10 side),
L3, the width of the region piece 40b (on the release end 47 side),
L4 spacing (between holes 43 and 45) and spacing (between holes 44 and 46),
L5 (from the end of the region piece 40b to the hole 43) L6 (from the end of the region piece 40a to the hole 43).

Claims (16)

It is a construction method for fixing an end portion of a weedproof structure formed based on a weedproof sheet on a sloped area in embankment or cut,
Attaching at least one end of the weedproof sheet to the flat surface of the plate-like member;
A step of installing the edge of the release end side of the long side of the plate-like member to which the herbicidal sheet is attached at a predetermined angle toward the slope;
The plate-shaped member has a hole for a nail-shaped device provided with a diameter equal to or larger than the diameter of the nail-shaped device in at least an overlap portion of adjacent grass-proof sheets, and the plate-shaped member to which the grass-proof sheet is attached is installed. And a step of placing a nail-like instrument on the slope by penetrating an overlap portion of adjacent herbicidal sheets and a hole in a plate-like member after the step. In the process of attaching the weedproof sheet to the plate member,
The construction method of the weedproof structure according to claim 1, wherein at least one end of the weedproof sheet is folded and wound around the end of the long side of the plate-like member. In the process of attaching the weedproof sheet to the plate member,
The construction method of the weedproof structure according to claim 1 or 2, wherein at least one end of the weedproof sheet is bonded or fused. The plate-like member has a shape in which a flat surface is divided into two region pieces by a bent portion along the long side,
In the process of installing a plate-like member with a weedproof sheet attached,
The area piece on the open end side is installed at a predetermined angle toward the slope,
The construction method of the weedproof structure according to any one of claims 1 to 3, wherein the region piece on the side of the weedproof sheet is installed in parallel to the slope. The plate-like member has a long side dimension equal to or less than the short side dimension of the weedproof sheet,
In the process of attaching the weedproof sheet to the plate member,
The construction method of the weedproof structure in any one of Claims 1-4 which attaches an individual plate-shaped member for every weedproof sheet. The plate-like member has a long side dimension less than or equal to the dimension of the short side dimension of the weedproof sheet, excluding the overlapping margin part with the adjacent weedproof sheet,
In the process of attaching the weedproof sheet to the plate member,
The construction method of the weedproof structure of Claim 5 which attaches an individual plate-shaped member for every weedproof sheet, providing the overlap margin part of an adjacent weedproof sheet. In the process of installing a plate-like member with a weedproof sheet on the slope,
A step of digging a groove of a size capable of embedding a plate-like member in advance;
The construction method of the weedproof structure in any one of Claims 1-6 which has the process of embedding the plate-shaped member to which the weedproof sheet was attached. In the process of digging a groove of a size that can embed a plate-like member in advance,
The construction method of the weedproof structure according to claim 7, wherein a tool having rotating teeth is used to form the groove. In the process of digging a groove of a size that can embed a plate-like member in advance,
The construction method of the weedproof structure according to claim 7, wherein a groove is formed along the end portion using a scoop-like tool. In the process of digging a groove of a size that can embed a plate-like member in advance,
The method for constructing a weedproof structure according to claim 7, wherein in order to form the groove, a plate-like body having a thickness and length dimensions equal to or greater than those of the plate-like member is previously driven into the slope . In the process of installing a plate-like member with a weedproof sheet on the slope,
The construction method of the weedproof structure in any one of Claims 1-6 which lays the plate-shaped member to which the weedproof sheet was attached. Before and after the process of attaching the end of the weedproof sheet to the plate member,
Of the portion protruding from the short side of the plate-shaped member of the weed sheets, of any one of claims 1 to 11 comprising the step of resecting a portion of moiety attached to adjacent plate member weed Construction method of the structure . In the process of excising a part from the part that can be attached to the adjacent plate member,
The construction method of the weedproof structure according to claim 12, wherein a part of the folded portion is cut out.   The weed prevention structure formed by the construction method of any one of Claims 1-13.   The plate-shaped member which is used with the construction method of any one of Claims 1-13, and whose long side dimension is below the short side dimension of a weedproof sheet. The plate-like member according to claim 15, wherein the cross-sectional shape is L-shaped or hemi-shaped.

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