JP5413676B2 - Weedproof structure including weedproof sheet and construction method thereof - Google Patents

Description

  The present invention relates to a grass protection structure including a grass protection sheet and a construction method thereof, which are arranged in a place where grass growth needs to be prevented, particularly a place which already has a support.

  It is often necessary to prevent the growth of grass such as weeds on roads, railroads, rivers, parks or afforestation gardens, and the surrounding ground, surfaces, and especially slopes because of the loss of aesthetics. In particular, on the shoulders of roads and the slopes adjacent to them, the growth of weeds not only impairs the aesthetics but also may impair traffic safety. Therefore, it is necessary to prevent grass growth in those places.

  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.

  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). .

  In Patent Document 4, a main body opening is provided at a position corresponding to the post position of the weedproof sheet, a main body cutting part is formed between the main body opening and the end of the weedproof sheet, and a separate body is provided. A main body opening is formed also in the patch sheet, and a main body cutting portion is formed between the main body opening and the end of the patch sheet. Then, the propeller is passed through the prop from the main body cutting part of the weedproof sheet to the main body opening, and then the post is passed through the prop from the main cutting part of the patch sheet to the main body opening. It is disclosed that the patch sheet is laid on the grass prevention sheet so that the grass prevention sheet penetrates and the body cutting portion of the grass prevention sheet and the body cutting portion of the patch sheet do not overlap.

JP 2002-272348 A JP 2005-307518 A JP 2006-177122 A Japanese Patent No. 4325742

  However, in the laying method of patent document 3 and patent document 4, the opening operation | work to a weedproof sheet was implemented separately for every support | pillar. In general, guard rail columns and the like are constructed at equal intervals such as 2 m intervals or 4 m intervals. On the other hand, the weedproof sheet is often supplied with a width of 1 m, and in a general method for constructing a weedproof structure, about 100 mm of the width of the weedproof sheet is used as a stacking allowance. That is, weed-proof sheets with an effective use width of 900 mm are connected side by side.

  Therefore, the position of the main body opening within the width of each grass protection sheet relative to each guard rail column is different each time. For example, if one main body opening is formed in accordance with the center (1/2) of the dimension excluding the overlap allowance width of one 1 m wide weedproof sheet with respect to one strut of a guardrail with a distance of 2 m, the adjacent struts Is connected to the second grass protection sheet, and the body opening is opened there, but the position is shifted by 200 mm from the center. In other words, each time, on-site alignment and drilling of the opening of the main body are necessary, which requires a lot of man-hours and is complicated. In addition, there is a case where a main body opening is provided in the overlapping portion at the time of shifting. In this case, punching is an operation of making a hole in the overlapping portion of two sheets, and workability is lowered.

  Therefore, the present invention is capable of forming a body opening in each herbicidal sheet efficiently and easily at low cost, and can be installed by a method and a construction method that can easily construct a herbicidal structure even if there are columns and the like. An object of the present invention is to provide a weedproof structure.

The preferable aspect of the construction method of this invention is shown below. In the present invention, these embodiments can be appropriately combined.
<1> In order to solve the above-mentioned problem, the construction method of the weed prevention structure according to the present invention has a long side and a short side in a weed prevention area in which a plurality of support columns are erected at equal intervals in a row. A construction method for installing a weedproof structure in which rectangular weedproof sheets are combined, the weedproof sheet having a short side width W and a value obtained by dividing the upright interval L between the columns by a positive integer n In addition, the strut penetrates at a position corresponding to the strut position in the weedproof sheet, and the step of forming a value obtained by adding the overlap margin width M of the adjacent weedproof sheets in the weedproof structure (L / n + M) A step of forming a possible opening of the main body, a step of penetrating the main body opening of the herbicidal sheet through the support, and a side end of the overlapping amount of the herbicidal sheet opposite to the overlapping amount of the adjacent herbicidal sheet Fusing or bonding.
According to the construction method of the weedproof structure of this aspect, the short side width of the weedproof sheet is widened by the overlapping margin, and the main body opening for the column is previously formed in the short side width excluding the overlapping margin. Therefore, the position of the main body opening does not take up the overlap, and the main body opening can be easily formed.

<2> Preferably, in the step of forming the main body opening in the weedproof sheet, the main body opening may be formed so that the main body opening is located at the same position in the plurality of weedproof sheets.
According to the construction method of the weed prevention structure of this aspect, since a main-body opening part can be formed in the same position of a several weed prevention sheet | seat, opening work can be made efficient.
In addition, the body opening part formed in a weedproof sheet may be single or plural per one weedproof sheet, but if one body opening part is formed in one weedproof sheet, it is advantageous in terms of strength. In addition, there may be a slight deviation in the interval L between the columns at the construction site, which is preferable because fine adjustment in that case becomes easy. On the other hand, when a plurality of main body openings are formed on one grass protection sheet, the intervals between the plurality of main body openings are fixed. Adjustment may be difficult.

<3> Preferably, in the step of forming the body opening in the weedproof sheet, the remaining width dimension (WM) obtained by subtracting the overlap margin width M from one side of the short side width W of the weedproof sheet. You may make it form a main-body opening part in the position of 1/2.
According to the construction method of the weedproof structure of this aspect, the strength of both sides of the main body opening can be made equal by forming the main body opening at the position of 1/2 of the remaining width of the weedproof sheet, The situation where strength is insufficient can be reduced.
In addition, there is a case where the overlap of the grass protection sheet has a slight deviation in the standing interval L between the columns at the construction site, and serves as an adjustment allowance for fine adjustment in that case.

<4> Preferably, in the step of arranging the weedproof sheet, the overlap margin width M portion of the weedproof sheet may be protruded into the laying area of the next adjacent weedproof sheet.
According to the construction method of the weed prevention structure of this aspect, arrangement | positioning of the next weed prevention sheet becomes easy by making it overlap and construct | pasting the overlap margin part to the installation area | region of the next adjacent weed prevention sheet.

<5> Preferably, the shape of the main body opening may be similar to the shape of the cross section of the support column and may have a main body cutting portion.
According to the construction method of the weedproof structure of this aspect, the support can be easily penetrated through the main body opening, and the main opening of the weedproof sheet can be brought into close contact with the periphery of the support, eliminating the gap. be able to.

<6> Preferably, a step of filling a silicon-based sealing material between the main body opening and the support may be further included.
According to the construction method of the grass-proof structure of this aspect, the gap between the main body opening and the column is filled with the sealing material to fill the gap, thereby preventing grass from growing from the gap and rainwater from entering from the gap. be able to.

<7> Preferably, the grass protection area is a grass protection area adjacent to the pavement surface, and the step of laying the grass protection sheet in the grass protection area includes the first upper and lower ends of the grass protection sheet on the pavement surface side. A step of overlapping the end portion, a step of fixing the first upper and lower end portions of the weedproof sheet to the paved surface side end portion by fusion or adhesion, and a first upper and lower end portion of the weedproof sheet, The step of fixing to the pavement surface side end portion with the first nail-like device and the second upper and lower end portion on the opposite side to the first upper and lower end portion of the grass protection sheet are fixed to the ground with the second nail-like device. A process may be included.
According to the construction method of the weed prevention structure of this aspect, since the weed prevention sheet can be laid without a gap between the pavement surface and the grass prevention area adjacent to the pavement surface, the grass grows from the gap and the rainwater from the gap Infiltration can be prevented.

<8> Preferably, the grass protection area is a grass protection area adjacent to a gutter disposed at a side edge of the pavement surface, and the step of laying the grass protection sheet in the grass protection area is the first of the grass protection sheets. The upper and lower end portions are arranged so as to overlap the side edge portions of the gutters arranged on the side edges of the pavement surface, and the first upper and lower end portions of the grass prevention sheet are fused or bonded to the pavement surface. The step of fixing to the side edge of the grass protection area of the side groove arranged at the side edge, and the first upper and lower ends of the grass protection sheet, the side groove arranged at the side edge of the pavement surface by the first nail-like device A step of fixing to the end portion on the side of the grass prevention area, and a step of fixing the second upper and lower end portion on the opposite side of the first upper and lower end portion of the grass protection sheet to the ground by the second nail-like instrument. Good.
According to the construction method of the grass protection structure of this aspect, the grass protection sheet can be laid in the grass protection area adjacent to the side groove disposed at the side edge of the pavement surface without any gap between the side groove of the pavement surface. Can prevent rainwater from entering through the gaps.

<9> Preferably, the pavement surface may be a pavement surface of an asphalt pavement road, and the grass protection area may include a slope on the outer side edge of the asphalt pavement road.
According to the construction method of the grass protection structure of this aspect, when the pavement is asphalt and the grass protection area includes a slope, there is no gap between the asphalt pavement surface or its side grooves, and the grass protection sheet is included including the slope. Can be laid.

<10> Preferably, an attachment is attached to the support column, and a step of forming a main body cutting portion between one point of the main body opening in the weedproof sheet and one point of the end portion of the weedproof sheet; Forming a patch cutting portion between the patch opening and one point on the opening side of the patch opening and one point on the end side of the patch sheet on the patch sheet, In the step of penetrating the main body opening through the support post, the main body cutting part is allowed to pass through the main body opening part, and the patch cutting part is further passed through to pass the support post through the patch opening part. A step of laying the patch sheet on the weedproof sheet may be included so as to cover all and the main body cutting part and the patch cutting part do not overlap.
According to the construction method of the weedproof structure of this aspect, even after an attachment such as a guard rail is attached to the support column, it can be applied around the support column by providing a main body cutting part at the main body opening, Since it can be covered with a patch sheet, a weedproof structure based on the weedproof sheet can be constructed.

<11> Preferably, the weedproof sheet and / or the patch sheet may be a modified asphalt-based weedproof sheet.
According to the construction method of the weedproof structure of this aspect, since the weedproof sheet is made of modified asphalt, the weedproof structure can be made excellent in waterproofness, service life and workability.

<12> Preferably, the attachment may be a guard rail.
According to the construction method of the weed prevention structure of this aspect, even if an attachment is what bridges the adjacent support | pillar like a guardrail, it can construct.

<13> Moreover, the weed prevention structure of this invention is constructed by the above-mentioned construction method.
The weedproof structure of this aspect is formed of a weedproof sheet that is formed wide by the overlap margin width M so that the above construction method is possible, and at least a main body opening for penetrating the column is provided. By using, opening work can be implemented collectively and construction of a weedproof structure can be facilitated.

  According to the present invention, when forming the weedproof structure, it is possible to form the main body opening at the same position of each weedproof sheet, and if necessary, the main body cutting part at the same position of each weedproof sheet Since it can be formed, it can be processed into a herbicidal sheet and processed before construction, and a construction method capable of constructing a herbicidal structure efficiently and at low cost and a herbicidal structure installed by the construction method are obtained. be able to.

It is the figure which showed the weed prevention structure from the edge part of the pavement surface of the upper part of the embankment which concerns on 1st Embodiment of this invention to a slope area, (a) is sectional drawing from a side surface, (b) Is a front view. It is the perspective view which expanded and showed the sheet | seat prevention sheet | seat sheet | seat structure around the support | pillar in the slope area of FIG.1 (b) with the support | pillar and the nail-like instrument. It is the top view which expanded and showed the weed prevention sheet | seat which has a main-body opening part used for the weed prevention structure around the support | pillar in the slope area of FIG.1 (b). It is sectional drawing which expanded and showed the support | pillar vicinity of Fig.1 (a). It is the figure which showed a mode that the side edge part of the weed prevention structure in the slope area of FIG. 1 (a) was arrange | positioned at the groove | channel of a slope face, and was fixed and buried with a nail-like instrument, (a) is buried. It is sectional drawing from the side surface of the side edge part of the weed prevention structure fixed with the front nail-like instrument, (b) is sectional drawing from the side surface after (a) was buried. It is the figure which showed the weed prevention structure from the edge part of the upper pavement surface of the embankment which concerns on 2nd Embodiment of this invention to a slope area, (a) is sectional drawing from a side surface, (b) Is a front view. (A) is the top view which expanded and showed the weed prevention sheet | seat which has a main-body opening part and a main-body cutting part used for the weed prevention structure around a support | pillar in the slope area of FIG.6 (b), (b) FIG. 3 is a top view of a patch sheet having a patch opening and a patch cutting part. It is sectional drawing which expanded and showed the vicinity of the support | pillar of Fig.6 (a). It is the figure which showed the weed prevention structure from the edge part of the upper pavement surface of the embankment which concerns on 3rd Embodiment of this invention to a slope area, (a) is sectional drawing from a side surface, (b) Is a front view. It is the top view which expanded and showed the weed prevention sheet | seat which has a main body opening part and main body cutting part which are used for the weed prevention structure around the support | pillar in the slope area of FIG.9 (b). It is the top view which showed the construction state of the several weed prevention sheet | seat used for the weed prevention structure of FIG.9 (b).

<First Embodiment>
A first embodiment of a weedproof structure and its construction method according to the present invention will be described in detail with reference to the drawings.

  First, schematic structure of the weed prevention structure 1 of this embodiment is demonstrated using FIGS. 1-4. As shown in FIG. 1 (b), the weedproof structure 1 of this embodiment has a structure in which a plurality of weedproof sheets 10 are connected by a sheet overlapping fusion part 17. In this way, by using the sheet superimposing and fusing portions 17 of the plurality of herbicidal sheets 10 of appropriately selected dimensions by using the heat fusing method or the tape bonding method, the herbicidal structure 1 of the present invention can be arbitrarily selected. It can be installed in accordance with the slope 30 area of the dimensions. In addition, the grass-proof structure 1 of the present invention can be used in any place where grass protection is required, such as roads, railways, rivers, parks, or afforestation gardens, and the surrounding ground, surface, and slope 30. Can also be used.

  Moreover, the weed prevention structure 1 combines the rectangular waterproofing herbicidal sheet | seat 10 which has the long side of a predetermined dimension, and a short side, for example, cuts and arranges the herbicidal sheet | seat 10 according to the shape of a herbicidal area. Can be created. 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. By using at least one of adhesion with adhesive tape, for example, by fixing to the range of the grass prevention area (the area where it is necessary to prevent grass growth) on the slope 30 area of the embankment 9 It is formed. Construction of the weedproof structure 1 can be facilitated by using the plurality of weedproof sheets 10.

  Further, the grass protection area is an area where the grass protection structure 1 is installed as described above. In this embodiment, a plurality of columns 21 having a diameter Dp for supporting the guard rail are provided on the side of the asphalt pavement. It is a weed control area standing in a row at intervals. In addition to the guardrail, the post 21 may be attached with an “attachment 22” such as a road sign or a signal. The grass protection area includes the periphery of the support column 21. Therefore, when constructing the weed prevention structure 1 in the weed prevention area including the support column 21, in order to penetrate the support member having the diameter Dp shown in FIG. It is necessary to provide such a main body opening 18. That is, the weedproof sheet 10 is formed with a body opening 18 having a diameter Dh substantially equal to the diameter Dp of the support so as to penetrate the support 21 having the diameter Dp at the position of the weed protection sheet 10 corresponding to the position of the support 21. ing. The diameter Dh is substantially equal to the diameter Dp of the column. The gap between the column 21 and the body opening 18 is preferably small, but the diameter Dh is slightly smaller than the diameter Dp in consideration of reducing friction during construction. This is because it includes a case where the diameter Dh is slightly smaller than the diameter Dp, such as a case where the diameter is large, and a case where the construction is performed in a compressed state using the elasticity of the grass prevention sheet 10. “Position corresponding to the position of the support column 21” means that when the grass protection sheet 10 is laid at a predetermined place in a certain grass protection area, the grass protection sheet 10 and the support column 21 arranged in the grass protection area overlap. It is a position.

  As shown in FIG. 3, the weedproof sheet 10 of the present embodiment has a short side width W equal to a value obtained by dividing the standing interval L of the columns 21 by a positive integer n. It forms so that it may become the value (L / n + M) which added the width | variety M of the overlap margin 17 of the grass sheet | seat 10. FIG. Moreover, when constructing the rectangular grass protection sheet 10 in accordance with the shape of the grass protection area including the support column 21, the main body opening 18 through which the support column 21 can penetrate at a position corresponding to the position of the support column 21 in the grass prevention sheet 10. Is formed.

  When constructing the grass protection sheet 10 having the body opening 18 formed in the grass protection area including the support column 21, the body opening 18 of the grass protection sheet 10 is penetrated by the support column 21, and the overlap margin of the grass protection sheet 10 is set. 17 is bonded to the side end portion 11 on the side opposite to the overlap margin 17 in the adjacent weedproof sheet 10 by a heat fusion method or by a tape adhesion method.

  When the body opening 18 is formed in the weedproof sheet 10, in this embodiment, the weedproof sheet is used for a plurality of support posts such as guardrails arranged at intervals L as shown in FIG. Similar positions in the width of 10 can be associated. For example, in the case of the herbicidal sheet 10 in which the horizontal width 100 mm of the present embodiment is added to the conventional 1 m (1000 mm) width with respect to the struts having an interval L of 2 m or 4 m, the adjacent weedproofing Even after fusing or adhering to the sheet 10, the position of each support column is the same position in the lateral width of the weedproof sheet 10.

  Therefore, the main body opening 18 can be formed in advance at the same position in the plurality of grass prevention sheets 10. Specifically, for example, the overlap margin width M is subtracted from one side of the short side width W of each weed prevention sheet 10 (WM), and the short center which is the remaining center after subtracting the overlap margin width M is subtracted. What is necessary is just to form the main-body opening part 18 in the position of 1/2 of a side width dimension (WM).

  In the present embodiment, as described above, the width of the short side of the weed control sheet 10 is widened by 17 overlaps, and a plurality of the weed control sheets to be constructed in the weed control area including the support column are the main body openings for the support column 21. 18 is formed in the short side width excluding the overlap allowance 17 in advance, particularly near the center. And it constructs so that the main body opening part 18 of the weedproof sheet 10 in which the main body opening part 18 was formed may be penetrated to the support | pillar 21. FIG.

  If it does in this way, since the main-body opening part 18 can be formed in the same position of the several grass prevention sheet | seat 10, opening work can be made efficient. Further, by forming the main body opening 18 at a position that is 1/2 of the remaining width of the weedproof sheet 10, the strength on both sides of the main body opening 18 can be made equal, and the situation where the strength is insufficient due to insufficient dimension on one side is reduced. can do. Further, since the position of the main body opening 18 does not reach the overlap margin 17, it is not necessary to process the two weed protection sheets 10 as the main body opening 18, and the formation of the main body opening 18 can be facilitated, and the two weed prevention Since it is not necessary to penetrate the sheet 10 through the support column 21, construction can be facilitated.

Further, when arranging the weedproof sheet 10 in the weedproof area, for example, a target line of the weedproof sheet laying area is set in advance for every 1 m in the vertical column of the slope, and the overlap margin of each weedproof sheet 10 is set. You may make it construct the width M part so that it may protrude into the laying area | region of the next adjacent weed prevention sheet | seat 10. FIG.
According to the construction method of the weed prevention structure of this aspect, for example, according to the column target line for every 1 m, the weed prevention sheet 10 is sequentially projected while protruding the overlapping portion 17 in the laying region of the next adjacent weed prevention sheet 10. The following arrangement of the herbicidal sheet 10 becomes easy.

  Further, the shape of the main body opening 18 of the weedproof sheet 10 is similar to the cross-sectional shape of the support column 21, and is approximately the same as the cross-sectional shape of the support column 21, and is the longest in the cross-sectional shape of the support column 21. It may be slightly larger or slightly smaller than the dimensions. When the ratio Dh / Dp between the longest dimension Dh of the shape of the main body opening 18 before penetrating the pillar 21 and the longest dimension Dp of the cross-sectional shape of the pillar 21 is the same and slightly larger, for example, 1 to 1.5 In the following, it is preferably 1 or more and 1.1 or less, and when it is slightly small, for example, it is 0.5 or more and less than 1, preferably 0.9 or more and less than 1. Even when the weedproof sheet 10 is slightly small, the main body opening 18 can be pushed down to the root from which the support column 21 protrudes from the ground surface due to its elasticity. The weedproof sheet 10 is extensible in at least the plane direction and has a tensile elongation of 20% or more.

  Further, when the main body opening 18 has a similar shape on the side smaller than the cross section of the support column 21, the main body opening 18 of the herbicidal sheet 10 can be brought into close contact with the periphery of the support column 21, so The gap between the two can be eliminated, rainwater can be prevented from entering, and the plant can be prevented from growing from the gap.

  In addition, when it is necessary to further eliminate the gap between the support column 21 and the main body opening 18, a silicon-based sealing material 40 is filled between the main body opening 18 and the support column 21 as shown in FIG. 4. May be.

  Further, when the grass protection area is a grass protection area adjacent to the pavement surface 25, when the grass protection sheet 10 is laid in the grass protection area, the first upper and lower end portions 12 of the grass protection sheet 10 are arranged on the pavement surface side. It arrange | positions so that the edge part 26 may overlap. The first upper and lower end portion 12 is one of the upper end portion and the lower end portion, and the second upper and lower end portion 13 is the other of the upper end portion and the lower end portion. When the pavement surface 25 is made on the upper surface of the embankment, the first upper and lower end portions 12 are upper end portions, and the first upper and lower end portions 12 (upper end portions) are arranged so as to overlap the pavement surface side end portions 26. .

Next, the first upper and lower end portion 12 (upper end portion) of the weedproof sheet 10 is fixed to the paved surface side end portion 26 by fusion or adhesion, and the first upper and lower end portion 12 (upper end portion) of the weedproof sheet 10 is fixed. Further, it is fixed to the paved surface side end portion 26 by the first nail-like instrument 14. Then, after laying the weedproof sheet 10 on the slope 30, the second upper and lower end part 13 (lower end part) opposite to the first upper and lower end part 12 (upper end part) of the weedproof sheet 10 is It fixes to the ground with the nail-like instrument 15 of.
If it does in this way, in the grass protection area adjacent to the pavement surface 25, since the grass protection sheet 10 can be laid without a gap with the pavement surface 25, it is possible to prevent grass from growing through the gap and intrusion of rainwater from the gap. .

  Moreover, even when the pavement surface 25 is a pavement surface of an asphalt pavement and the grass protection area includes the slope 30 outside the side edge of the asphalt pavement, the grass protection sheet 10 has flexibility. The weedproof sheet 10 can be laid without any gap with the asphalt pavement surface 25 and including the slope 30.

  In addition, for example, when the width of the slope 30 area is narrower than the weedproof sheet 10, that is, when the width of the slope 30 area is (1.1 m) as in the present embodiment, a single tape-like shape is used. The grass protection structure 1 can be installed using the grass protection 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 of the present embodiment lays the grass protection sheet 10 without any gap with the side edge 26 of the pavement surface 25 on the upper surface of the accumulated embankment 9 and including the slope 30. be able to. In that case, the weedproof structure 1 cuts the waterproof weedproof sheet 10 on the slope 30 area so as to match the shape of the laying place, and adjoins the 100 mm overlap margin 17. The end portion 17 on the opposite side of the herbicidal sheet 10 is placed in an overlapping manner, and the overlap margin 17 and the side end portion 11 are melted by a torch burner and then solidified, or they are heated and fused together, or the overlapping By inserting the tape having an adhesive self-adhesive layer (for example, a special rubberized asphalt adhesive layer) on both sides between the sleeve 17 and the side end portion 11 so as to adhere them by rolling. It is formed. In the present embodiment, the overlap margin 17 is set to 100 mm, but can be set to an arbitrary value between 50 mm and 200 mm. However, in that case, the short side width W of the weed prevention sheet 10 is set to a value obtained by dividing the standing interval L of the support column 21 by a positive integer n, and the overlapping margin of the adjacent weed prevention sheets 10 in the weed prevention structure 1 is made. Since it is a value (L / n + M) obtained by adding a width M of 17, it varies according to the above equation.

  By making the herbicidal sheet 10 asphalt as described above, not only the sheets can be easily bonded or fused, but also the fusing or bonding to the side grooves described later is only heating or rolling pressure. Can be easily

  In addition to the method of fusing or adhering the overlapping end portions of the above-described weedproof sheet 10, the end portion of one of the weedproof sheet 10 is fixed to the embankment 9 by a second nail-like tool 15 described later. Further, the end portion of another adjacent weedproof sheet 10 may be overlapped inside the second nail-like instrument 15 or the like at the end portion, and the overlapping portion may be fixed by fusion or adhesion.

  However, even if the waterproof weedproof sheet 10 is used, rainwater may enter through the gaps between the respective weedproof sheets 10. Therefore, according to the present embodiment, by continuously fusing or adhering the end portion of the sheet to the end portion of the adjacent sheet without any gap, water can enter from the overlapping gaps of the plurality of waterproof sheets. Suppressed.

  1 to 5 illustrate a case where one sheet of grass protection sheet 10 has one main body opening 18, but one sheet of grass protection sheet 10 includes two or more struts. Two or more body openings 18 can be provided to penetrate 21.

  The embankment 9 is formed, for example, by depositing earth and sand by civil engineering work for laying main roads, highways, railway tracks, and the like. In this case, the upper surface of the embankment 9 is a flat surface, and roadbeds for laying roads and tracks are provided, and side grooves 27 for drainage are provided at the ends along the roads and tracks. There is.

  The grass protection sheet 10 is a modified asphalt grass protection sheet 10 having a predetermined size such as 1.1 m (width) × 10 m (length) in the present embodiment, and the grass protection area on the slope 30 area. In accordance with the above range, it is cut as necessary, and the overlap margin is heated and fused 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 has waterproofness, a plant can be made difficult to grow by reducing the supply of moisture to the seeds and roots of the plant in the embankment 9. In addition, the length dimension of the weed prevention sheet 10 can be suitably selected according to the dimension of the slope 30 area and other construction conditions.

  The weedproof sheet side end 11 is a side end along the vertical direction of the slope 30 in the weedproof structure 1 and is shown in FIG. As described above, the fixing portion at the end portion is folded into a groove excavated with a size capable of being embedded, and a nail-like instrument is passed through at least the weedproof sheet 10 along the end portion of the weedproof sheet 10. The end of the weedproof sheet 10 is fixed to the slope 30 area of the embankment 9 with a nail-like tool by driving it intermittently into the surface 30. And after fixing further, as shown in FIG.5 (b), the groove | channel is refilled. In this way, by fixing the side edge of the weedproof sheet 10 to the slope 30 with a nail-like instrument, in addition to suppressing the floating of the weedproof sheet 10 due to wind, the side end is fixed in the groove. By refilling, the floating of the weedproof sheet 10 due to wind can be eliminated.

  The first upper and lower end portions 12 (upper end portions) are side end portions on the upper shoulder side of the weed prevention structure 1 laid on the slope 30 and are upper end portions of the respective weed prevention sheets 10. In the present embodiment, the first upper and lower end portions 12 are fixed so as to cover the side end 26 of the pavement surface 25 disposed in the upper portion of the slope 30 area of the embankment 9.

  The second upper and lower lower end portion 13 (lower end portion) is a lower end portion of the lower buttocks side of the weedproof structure 1 laid on the slope 30 and is a lower end portion of each weedproof sheet 10. In the present embodiment, the second upper and lower lower end portion 13 (lower end portion) is fixed to the slope 30 by the second nail-like instrument 15.

  By combining the fixing of the second upper and lower lower end portion 13 (lower end portion) and the fixing of the first upper and lower lower end portion 12 (upper end portion), it is possible to continue from the slope 30 to the side edge 26 of the pavement surface 25. The weedproof sheet 10 can be installed. Therefore, grass can be prevented from growing on the upper end portion of the slope 30 of the embankment 9.

  The first upper and lower end portions 12 (upper end portion) of the weedproof sheet 10 and the pavement surface 25 can be fixed by a heat fusion method. Specifically, the end portion of the weedproof sheet 10 is heated by a burner or the like, and the modified asphalt constituting the weedproof sheet 10 is melted and solidified to fix the end portion to the pavement surface 25 or the like.

  Moreover, the 1st upper-lower end part 12 (upper end part), the pavement surface 25, etc. of the weedproof sheet 10 can be fixed by the tape bonding method. Specifically, asphalt tape having adhesiveness on both sides can be inserted between the end portion of the weedproof sheet 10 and the pavement surface 25 and the like, and the end portion and the pavement surface 25 and the like can be fixed.

  From the viewpoint of securing the first upper and lower end portions 12 (upper end portion) of the weedproof sheet 10 and the pavement surface 25 and the like more securely, it is preferable to use a heat fusion method. Further, when the use of fire is restricted, it is preferable to use a tape bonding method.

In addition, the first nail-like instrument 14 may be, for example, a concrete screw, a combination of a screw and a nylon plug, a plug anchor, a combination of a screw, a nylon plug, and a fixing disk. The grass protection sheet 10 is fixed to the side edge 26 of the pavement surface 25, and in order to fix the grass protection sheet 10 to the side edge 26 of the pavement surface 25, a drill or the like penetrates the grass protection sheet 10 to the underlying concrete. And drilling the first nail-like instrument 14. 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 the 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 side edge 26 of the pavement surface 25.
Thus, by fixing with the additional nail-shaped instrument, the fixing of the weedproof sheet 10 to the first upper and lower end portions 12 (upper end portions) can be made more reliable. In this embodiment, the weedproof sheet 10 is fixed to the first upper and lower end portions 12 (upper end portion), but the side end 26 of the pavement surface 25 is provided on the buttock side, and the weedproof structure 1 is constructed there. In this case, the first nail-like instrument 14 may be used for the second upper and lower lower end portion 13 (lower end portion).

  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 nailing machine in order to efficiently and reliably fix the concrete nails.

The second nail-shaped instrument 15 is, for example, 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 trunk portion has a straight or spiral shape. Moreover, as an example of the dimension of the L-shaped pin as the second nail-shaped instrument 15, one having a diameter of 9 mm and a long side of 200 mm can be used. For example, the second nail-like instrument 15 is driven by penetrating the lateral end of the weedproof sheet 10 through the weedproof sheet 10 at intermittent intervals with respect to the slope 30 along the end. Thereby, the weedproof sheet 10 can be fixed to the slope 30 area of the embankment 9.
Thus, the floating of the weedproof sheet 10 by a wind can be suppressed by fixing the side edge part of the weedproof sheet 10 to the slope 30 with a nail-like instrument.

  The sheet overlap fusion part 17 is a part of the side end portions of each herbicidal sheet 10 that is continuously fused or bonded without gaps to the side end portions of adjacent sheets, and has an overlap margin of 50 mm to 200 mm. This is the part. For example, it is possible to suppress the intrusion of water from a gap where a plurality of waterproof sheets are overlapped by overlapping and welding 100 mm. In addition, in order to make the waterproofing property of the overlap (overlap allowance) more complete, even if the gap of the overlap allowance is filled with, for example, a caulking material or a sealing material (sealant) containing silicon as a component, the gap is eliminated. Good.

  When the weedproof sheet 10 is fixed to the side edge 26 of the pavement surface 25, in addition to the above fusion or adhesion, the first nail-like instrument 14 that is driven through the weedproof sheet 10 is further replaced with the pavement surface 25. It can fix more reliably by using and fixing as an additional nail-like instrument intermittently along the formation direction of the side edge 26 of this.

  The slope 30 is an oblique slope portion on the side of the embankment 9, and the weedproof structure 1 of the present embodiment is disposed on the entire portion, on the lower side (the buttock side), or on the upper side (the shoulder side). Is done.

  5A is formed in the vertical direction of the slope 30 along the edge portion 11 of the grass protection sheet side end portion 11. After inserting the weed prevention sheet side end portion 11 in the slope vertical direction excavation part 31, the second nail-like instrument 15 is driven through the weed prevention sheet 10. The driving interval is intermittent, for example, every 0.5 m along the end portion 11 on the grass prevention sheet side (up and down direction of the slope 30). Thereby, the weedproof sheet 10 can be fixed to the slope 30 area of the embankment 9. In this way, by fixing the end portion of the weedproof sheet 10 to the slope 30 with the second nail-like instrument 15, for example, wind blowing along the slope 30 or wind blowing toward the slope 30 is prevented. It is possible to prevent the grass prevention sheet 10 from being drowned or floated by blowing into the lower side of the grass sheet 10.

  5B is a method of digging into a groove shape having a dimension capable of embedding a portion to be fixed along the end portion of the weedproof sheet 10 as described above. After inserting the grass protection sheet side end portion 11 in the surface vertical direction excavating portion 31 and driving and fixing the second nail-like instrument 15, the groove is backfilled. Thus, the grass-proof sheet side end portion 11 is fixed in the groove and backfilled to ensure the fixing, and the grass is blown along the slope 30 or the wind blown toward the slope 30. The sheet 10 can be prevented from being bent or lifted. It can prevent that the 2nd upper-lower-end part 13 (lower end part) of the weedproof sheet 10 falls down by a storm etc.

  In this embodiment, the modified asphalt type is used as the weedproof sheet 10, but the present invention is not limited to this, and the effect can be obtained by appropriately selecting from the commercially available weedproof sheet 10. 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. The modified asphalt-based herbicidal sheet 10 can be used by diverting an architectural waterproof sheet (modified asphalt-based waterproof sheet). 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, using the modified asphalt-based herbicidal sheet 10 as the material of the herbicidal sheet 10 used for the herbicidal structure 1 of the present invention, the end portion of the pavement surface 25 with respect to the side edge 26 by a heat fusion method, It is preferable to fix. This is because by using the heat fusion method, it is possible to further ensure the adhesion / fixation between the herbicidal sheet 10 and the side end 26 of the pavement surface 25, and to reliably prevent the generation of a gap. .

  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. A penetration type weedproof sheet, for example, a penetration-type weedproof sheet disclosed in JP 2009-138486 A can be preferably used.

<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.
(1) (e) At least one synthetic resin in which the hard synthetic resin of the back layer is selected from the group consisting of polypropylene, polyester, polycarbonate, polyamideimide, polyesterimide, polyamide, polyimide, polyvinyl chloride, and polyhalogenated polyvinyl It is.
(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>
With a penetration-proof grass protection sheet, it has light-shielding and weather resistance to prevent grass growth on the ground, surface, especially slope 30 such as roads, railroads, rivers, parks or afforestation gardens and their surroundings. In addition, it is possible to obtain the herbicidal sheet 10 which is excellent in mechanical properties and water impermeability, and further excellent in preventing penetration of hard and sharp weed buds against the herbicidal sheet 10.

<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, the modified asphalt having the above composition is used as the (b) layer and the (d) layer. An excellent layer can be formed, not only can the moisture essential for the growth of weeds be blocked, but if the slope 30 is constructed of embankment, rainwater from the top of the slope 30 (slope) By effectively preventing the water on the slope 30 itself due to infiltration, collapse of the slope 30 ground 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 weed prevention structure of this embodiment and its construction method, it is possible to prevent the growth of grass throughout the entire area including the gap between the slope of the slope and the paved road of the shoulder in the sloped area of the embankment. .

  Moreover, the weedproof structure of this embodiment constructed by the construction method described above is more than the conventional 1m width weedproof sheet by the overlap margin width M (for example, 100 mm) so that the construction method described above is possible. Also, the weedproof sheet 10 provided with a main body opening 18 for at least penetrating the column 21 is used. Thereby, the opening operation | work which forms the main body opening part 18 in each grass protection sheet 10 can be implemented collectively, and construction of the grass protection structure 1 can be made easy.

Second Embodiment
In the present embodiment, as shown in FIG. 6, the attachment 22 is already attached to the column 21 with an attachment member 23 such as a bolt / nut, and the attachment 22 is, for example, a guard rail. In the present embodiment, as shown in FIG. 7, a patch sheet 60 that forms a main body cutting portion 19 between the main body opening 18 and the shoulder-side end 12 in the weedproof sheet 10 and further covers the main body opening 18. Is used. The shape of the patch sheet 60 is a square or a rectangle, and the length of one side of the square or the rectangle is 100 to 400 mm longer than the longest dimension Dp of the cross-sectional shape of the support column 21.

  Further, as shown in FIG. 7, when the patch sheet 60 is used, the shape of the main body opening 18 is similar to the cross-sectional shape of the support column 21, but is smaller than the longest dimension of the cross-sectional shape of the support column 21. There is no need to do this, and it may be larger than the longest dimension of the cross-sectional shape of the column 21 in order to facilitate the construction work. For example, the shape of the main body opening 18 before penetrating the support column 21 is similar to the cross-sectional shape of the support column 21 and can be 1 to 20 mm larger than the longest dimension Dp of the cross-sectional shape of the support column 21.

  In that case, the patch opening 61 of the patch sheet 60 is made smaller than the longest dimension Dp of the cross-sectional shape of the column 21. For example, the ratio Dhp / Dp between the longest dimension Dhp of the shape of the patch opening 61 before penetrating the strut 21 and the longest dimension Dp of the cross-sectional shape of the strut 21 is 0.5 or more and less than 1. The shape of the patch opening 61 before penetrating the support column 21 is, for example, similar to the cross-sectional shape of the support column 21 and smaller than the longest dimension of the cross-sectional shape of the support column 21. The patch sheet 60 is extensible in at least the plane direction, and the tensile elongation rate of the patch sheet 60 is 20% or more.

  Moreover, in this embodiment, the main body cutting part 19 is formed between one point 51 of the main body opening 18 in the weedproof sheet 10 and one point 52 of the shoulder side end portion 12 of the weedproof sheet 10. From the viewpoint of more reliably preventing grass growth, it is preferable to shorten the main body cutting portion 19 of the weedproof sheet 10 as much as possible. Therefore, it is preferable to form the main body cutting part 19 so that the distance between the one point 51 of the main body opening 18 and the one point 52 of the road shoulder side end part 12 of the grass prevention sheet 10 is the shortest distance. That is, the shape of the main body cutting part 19 is preferably linear.

  6 illustrates the case where one sheet of grass protection sheet 10 has one main body opening 18, but one sheet of grass protection sheet 10 penetrates two or more support columns 21. In order to achieve this, more than one body opening 18 can be provided. In such a case, it is difficult to accurately form the plurality of main body openings 18 at the position of the weed prevention sheet 10 corresponding to the positions of the plurality of columns 21. Therefore, the main body opening 18 is preferably 1 to 20 mm larger than the longest dimension of the cross-sectional shape of the column 21. The “longest dimension of the shape” refers to the longest length of straight lines connecting two arbitrary points of the shape. For example, when the cross-sectional shape of the support column 21 is a circle, the longest dimension Dp of the shape of the support column 21 is the diameter of the circle. Moreover, when the shape of the support | pillar 21 is a rectangle, the longest dimension is the length of a diagonal line.

  Similarly, in the patch sheet 60, a patch cutting part 62 is formed between the patch opening 61, the point 71 on the opening side of the patch opening 61, and the point 72 on the edge of the patch sheet 60. The patch cutting part 62 is preferably formed such that the distance between the one point 71 of the patch opening 61 and the one point 72 of the edge of the patch sheet 60 is the shortest distance. That is, it is preferable that the shape of the patch cutting part 62 is linear.

  When penetrating the main body opening 18 of the herbicidal sheet 10 through the column 21, the column 21 is passed through the main body opening 18 by passing the main body cutting portion 19, and the column cutting portion 62 is further passed therethrough. The patch sheet 60 is laid on the herbicidal sheet 10 so as to penetrate the patch opening 61, cover the entire body cutting part 19, and prevent the main body cutting part 19 and the patch cutting part 62 from overlapping each other.

  Further, as described above, the weedproof sheet 10 has the main body cutting part 19 which is a part cut between the main body opening 18 and one point 52 at the end of the weedproof sheet 10. Since the weedproof sheet 10 has the main body cutting part 19, when the weedproof sheet 10 is laid, the support 21 is passed through the main body cutting part 19 as shown in FIGS. It is easy to pass through the opening 18. Therefore, even when an attachment 22 such as a guard rail is attached to the support column 21, the weedproof sheet 10 can be easily laid.

  In the drawing, the support column 21 is a circular support column, and the cross-sectional shape thereof is circular. Or any other shape. The shape of the main body opening 18 of the weedproof sheet 10 used in the weedproof structure 1 of the present invention is preferably similar to the shape of the cross section of the column 21.

<Patch sheet 60>
The herbicidal structure 1 of the present invention includes a patch sheet 60. An example of the patch sheet 60 is shown in FIG. The patch sheet 60 has a patch opening 61 and a patch cutting part 62. The patch sheet 60 is laid on the grass prevention sheet 10. The patch opening 61 is a main body opening for allowing the patch sheet 60 to penetrate the support column 21.

  The patch sheet 60 includes a patch cutting portion 62 that is a portion obtained by cutting between a point 71 on the opening side of the patch opening 61 and a point 72 on the end side on the side of the patch sheet 60. When the patch sheet 60 is laid on the grass prevention sheet 10, the strut 21 can pass through the patch opening 61 by passing the strut 21 through the patch cutting portion 62. Therefore, even when an attachment 22 such as a guard rail is attached to the support column 21, the patch sheet 60 can be easily laid.

  When laying the patch sheet 60 on the weedproof sheet 10, the patch sheet 60 is laid so as to cover the main body cutting part 19 of the weedproof sheet 10. At this time, the patch sheet 60 is laid so that the main body cutting part 19 and the patch cutting part 62 do not overlap. By laying the patch sheet 60 on the weedproof sheet 10 in this way, the entire main body cutting part 19 is covered with a portion other than the patch cutting part 62 of the patch sheet 60. Grass growth from the cutting part 19 can be prevented.

  It is preferable to fix the weedproof sheet 10 and the patch sheet 60 laid on the weedproof sheet 10 by a heat fusion method. In the heat fusion method, when a part where two objects contact is fixed, at least one of the two objects is heated by a burner or the like to be melted and solidified. It is a fixing method. Specifically, the surface of the weedproof sheet 10 and the back surface of the patch sheet 60 can be fixed by heating and melting with a burner or the like and solidifying. When the fixing is performed by the heat fusion method, as shown in an enlarged view of the vicinity of the support column 21 of the herbicidal structure 1 in FIG. 16, the end portion of the patch sheet 60 is heated and bonded to the surface of the support column 21 (heating) By forming a fusion part), the weedproof effect of the gap between the weedproof sheet 10 and the column 21 can be further enhanced. In addition, inorganic particles or the like may be disposed on the surface of the herbicidal sheet 10 or the patch sheet 60, but when fixing by a heat fusion method, these inorganic particles may be fixed after being removed, You may fix without removing.

  The fixing of the herbicidal sheet 10 and the patch sheet 60 laid on the herbicidal sheet 10 can be achieved by using fire, such as when installed near a residential area or when there are many flammable materials such as undergrass near the installation location. In the case of restriction, an adhesive method may be used, and in that case, a tape adhesive method may be used, but a high-viscosity liquid adhesive is preferably used.

  The patch sheet 60 needs to have a shape that is large enough to cover the main body cutting part 19 when laid. The patch sheet 60 may be circular, elliptical, square or rectangular, and is preferably square or rectangular. The length of one side of the square or rectangular patch sheet 60 is preferably 100 to 400 mm longer than the longest dimension Dp of the cross-sectional shape of the column 21.

  From the viewpoint of minimizing the length of the main body cutting part, it is preferable that the main body cutting part 19 of the weedproof sheet 10 and the patch cutting part 62 of the patch sheet 60 are both linearly cut. Further, from the viewpoint of ensuring the prevention of grass growth, the patch sheet 60 is adjusted so that the angle θ around the center position of the column 21 between the main body cutting part 19 and the patch cutting part 62 is 90 to 270 degrees. It is preferable to lay on the weedproof sheet 10.

  The shape of the patch opening 61 of the patch sheet 60 is similar to the shape of the cross section of the column 21 and is substantially the same as the shape of the cross section of the column 21 as in the case of the main body opening 18. It may be slightly larger or slightly smaller than the longest dimension of the 21 cross-sectional shape. When the ratio Dh / Dp between the longest dimension Dh of the shape of the patch opening 61 before penetrating the strut 21 and the longest dimension Dp of the cross-sectional shape of the strut 21 is the same and slightly larger, for example, 1 or more 1 0.5 or less, preferably 1 or more and 1.1 or less, and when slightly smaller, for example, 0.5 or more and less than 1, preferably 0.9 or more and less than 1. Usually the same and slightly larger.

  Further, from the viewpoint of more reliably preventing grass, the tensile elongation of the patch sheet 60 is preferably 20% or more, more preferably 30% or more, more preferably 40% or more, and particularly preferably 50% or more. It is preferable. By using the patch sheet 60 having the above-described tensile elongation rate, it is possible to obtain good weedproof sheet 10 workability and excellent herbicidal properties. The “tensile elongation” is a measured value based on JIS A6013.

  According to the construction method of the weedproof structure of this aspect, even after the attachment 22 such as the guard rail is attached to the support 21, it can be applied around the support 21 by providing the main body cutting part 19 in the main body opening 18. Since the main body cutting part 19 can be covered with the patch sheet 60, the weedproof structure 1 based on the weedproof sheet 10 can be constructed.

  Further, the weedproof sheet 10 and / or the patch sheet 60 may be the modified asphalt-based weedproof sheet 10. According to the construction method of the weedproof structure of this aspect, since the weedproof sheet 10 is made of modified asphalt, the weedproof structure 1 can be made excellent in waterproofness, service life and workability.

  According to the construction method of the weed prevention structure of this embodiment, the opening operation | work which forms the main body opening part 18 in each grass prevention sheet 10 of 1st Embodiment can be implemented collectively, and construction of the weed prevention structure 1 can be carried out. In addition to the effect that it can be easily performed, the weedproof sheet 10 can be easily constructed even if the attachment bridges the adjacent support column 21 like a guard rail.

<Third Embodiment>
In the present embodiment, as shown in FIGS. 9 to 11, the main body opening 18 of the second embodiment is brought close to the overlap margin 17 side to be adjacent to the overlap margin 17 and the main body cutting portion 19 is formed on the overlap margin 17 side. By using the herbicidal sheet 10, the patch sheet 60 can be avoided.

  In the present embodiment, the main body cutting portion 19 is formed between one point 51 of the main body opening 18 in the weedproof sheet 10 and one point 52 at the end portion on the stacking margin 17 side of the weedproof sheet 10. As described above, it is preferable to shorten the main body cutting portion 19 of the herbicidal sheet 10 as much as possible from the viewpoint of more reliably preventing grass growth. It is preferable to form the grass sheet 10 so that the distance from the one point 52 at the end portion on the stacking margin 17 side is the shortest distance. That is, the shape of the main body cutting part 19 is preferably linear.

As shown in FIG. 11, the overlap margin 17 including the main body cutting portion 19 is fused or bonded to the opposite end portion of the adjacent weedproof sheet 10. For example, the herbicidal sheet side end 11A of the herbicidal sheet 10A is fused or adhered to the overlap margin 17B of the herbicidal sheet 10B, and the herbicidal sheet side end 11B of the herbicidal sheet 10B is bonded to the herbicidal sheet 10C. It is fused or bonded to the overlap margin 17C. Thereby, the lack of strength on the side of the overlap margin 17 from the main body opening 18 in the weedproof sheet 10 is resolved. Moreover, since the distance from the main body opening part 18 in the weed prevention sheet 10 to the overlap margin part 17 to the weed prevention sheet side edge part 11 increases, intensity | strength will also increase.
In such an embodiment, the sealing material is preferably finally filled as shown in the cross-sectional view in the vicinity of the column in FIG.

  According to the construction method of the weed prevention structure of this embodiment, the opening operation | work which forms the main body opening part 18 in each grass prevention sheet 10 of 1st Embodiment can be implemented collectively, and construction of the weed prevention structure 1 can be carried out. In addition to the effect of being able to easily and the effect of being able to easily construct the weedproof sheet 10 even if the attachment is to bridge the adjacent support column 21 like a guard rail in the second embodiment. Thus, the strength of the herbicidal structure 1 using the herbicidal sheet 10 is increased, and the patch sheet 60 can be made unnecessary.

1 herbicidal structure,
9 Filling,
10 Weedproof sheet,
11 Weed protection sheet side end,
12 Shoulder side edge,
13 Hoshiri side edge,
14 First nail-like instrument (nylon plug + disc),
15 Second nail-shaped instrument (L-shaped pin),
17 Overlap allowance (sheet overlap fusion part),
18 body opening,
19 Main body cutting part,
21 struts,
22 Attachments (guardrails, etc.)
23 mounting member,
25 Paved surface,
26 Side edges of paved surface,
27 gutter,
28 slope side wall,
30 slopes,
51 One point of the body opening,
52 One point on the shoulder side of the weedproof sheet,
60 patch sheet,
61 patch opening,
62 patch cutting part,
71 One point 71 on the opening side of the patch opening,
72 One point 72 at the end of the patch sheet on the buttock side.

Claims (13)

It is a construction method for installing a weedproof structure in which a rectangular weedproof sheet having a long side and a short side is combined in a weedproof area in which a plurality of columns are erected at equal intervals in a row,
A value obtained by adding the overlap margin width M of adjacent herbicidal sheets in the herbicidal structure to the value obtained by dividing the weedproof sheet by a short side width W obtained by dividing the upright interval L between the columns by a positive integer n ( L / n + M), and
Forming a main body opening through which the support can penetrate, at a position corresponding to the position of the support in the grass prevention sheet;
Passing the body opening of the weedproof sheet through the support;
A method for constructing a weedproof structure, comprising the step of fusing or adhering the overlapping margin of the grassproof sheet to a side end portion opposite to the overlap margin of the adjacent grassproof sheet. In the process of forming the body opening in the weedproof sheet,
The construction method of the weedproof structure according to claim 1, wherein the main body opening is formed so that the main body opening is at the same position in the plurality of the weedproof sheets. In the step of forming the main body opening in the weedproof sheet, at the position of 1/2 of the remaining width dimension (WM) obtained by subtracting the overlap margin width M from one side of the short side width W of the weedproof sheet. The construction method of the weedproof structure according to claim 1 or 2, wherein a main body opening is formed. The weedproof structure according to any one of claims 1 to 3, wherein in the step of arranging the weedproof sheet, the overlap margin width M portion of the weedproof sheet is applied to the laying area of the next adjacent weedproof sheet. Body construction method.   The construction method according to any one of claims 1 to 4, wherein a shape of the main body opening is similar to a cross-sectional shape of the support column and has a main body cutting portion.   The construction method according to claim 1, further comprising a step of filling a silicon-based sealing material between the main body opening and the support column. The grass protection area is a grass protection area adjacent to the pavement surface, and the step of laying a grass protection sheet in the grass protection area,
Arranging the first upper and lower ends of the weedproof sheet so as to overlap the paved surface side end,
Fixing the first upper and lower ends of the weedproof sheet to the pavement side end by fusing or bonding; and
Fixing the first upper and lower ends of the weedproof sheet to the paved surface side end by the first nail-like tool;
The construction according to any one of claims 1 to 6, further comprising a step of fixing the second upper and lower ends opposite to the first upper and lower ends of the weedproof sheet to the ground with a second nail-like instrument. Method. The grassproof area is a grassproof area adjacent to a gutter disposed at a side edge of the pavement surface, and a step of laying a grassproof sheet in the grassproof area,
A step of arranging the first upper and lower ends of the weedproof sheet so as to overlap with the end portion of the side of the side groove of the side surface of the pavement surface,
Fixing the first upper and lower end portions of the weedproof sheet to the end portions of the side walls of the side grooves arranged at the side ends of the pavement surface by fusing or bonding;
Fixing the first upper and lower end portions of the weedproof sheet to the end portion of the side wall of the side groove arranged at the side end of the pavement surface by the first nail-like tool;
The construction according to any one of claims 1 to 6, further comprising a step of fixing the second upper and lower ends opposite to the first upper and lower ends of the weedproof sheet to the ground with a second nail-like instrument. Method.   The construction method according to claim 7 or 8, wherein the paved surface is a paved surface of an asphalt paved road, and the grass prevention area includes a slope on the outer side edge of the asphalt paved road. An attachment is attached to the column,
Forming a main body cutting part between one point of the main body opening in the weedproof sheet and one point of the end of the weedproof sheet;
Forming a patch cutting portion between the patch opening and one point on the opening side of the patch opening and one point on the end side of the patch sheet on the patch sheet;
Including
In the step of penetrating the main body opening of the grass prevention sheet into the column, the column is penetrated through the main body opening by passing the main body cutting portion,
Further, the post is passed through the patch cutting part to penetrate the patch opening, and the patch sheet is laid on the grass prevention sheet so as to cover all the main body cutting part and not to overlap the main body cutting part and the patch cutting part. The construction method of any one of Claims 1-8 including a process.   The construction method according to any one of claims 1 to 10, wherein the weedproof sheet and / or the patch sheet is a modified asphalt-based weedproof sheet.   The construction method according to claim 9 or 10, wherein the attachment is a guardrail.   The weed prevention structure constructed by the construction method according to any one of claims 1 to 11.

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