JP2005133415A - Execution structure of civil engineering cut off sheet - Google Patents

Execution structure of civil engineering cut off sheet Download PDF

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JP2005133415A
JP2005133415A JP2003370296A JP2003370296A JP2005133415A JP 2005133415 A JP2005133415 A JP 2005133415A JP 2003370296 A JP2003370296 A JP 2003370296A JP 2003370296 A JP2003370296 A JP 2003370296A JP 2005133415 A JP2005133415 A JP 2005133415A
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sheet
water
slope
laid
cut
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Yoshitaka Higashida
義孝 東田
Kenzo Iwamoto
憲三 岩本
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Mitsuboshi Belting Ltd
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Mitsuboshi Belting Ltd
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Priority to JP2003370296A priority Critical patent/JP2005133415A/en
Priority to KR20-2003-0037014U priority patent/KR200344210Y1/en
Publication of JP2005133415A publication Critical patent/JP2005133415A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE
    • B09B1/00—Dumping solid waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Processing Of Solid Wastes (AREA)
  • Laminated Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an execution structure of a cut off construction not loosening the sheet of a slope face bringing no damage by the front edge of a rock laying even on the steep sloped face, abutting along the substrate sufficiently even when the bottom face settles down. <P>SOLUTION: In an execution structure in which a civil engineering cut off sheet is laid on the surface of the substrate 1 having a sloped face 2 and the bottom face 3, a cut off sheet 6 for the sloped face in which a base cloth 4 is embedded in the cut off membrane 5 is laid on the sloped face 2. The cut off sheet 7 for the bottom face formed of only the cut off membrane 8 is laid on the bottom face 3. The base cloth 4 with the strength of 100-700 N/cm at 15-35% in elongation is used in the cut off sheet 6 for the sloped face. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は貯水池、調整池、公園池、廃液処理池、一般廃棄物処分場、埋め立て地等に施工する土木用遮水シートの施工構造に関する。   TECHNICAL FIELD The present invention relates to a construction structure for a civil engineering impermeable sheet for construction in a reservoir, a regulating pond, a park pond, a waste liquid treatment pond, a general waste disposal site, a landfill, and the like.

従来、貯水池、調整池、公園池等の水を溜めなければならないところや、廃液処理池、一般廃棄物処分場等の有害物質や汚濁液などが下地に浸出して公共の水域および地下水を汚染しないように必要に応じて遮水工を設けなければならない。遮水工の一つとして表面遮水工があり、それは、一般に下地の透水係数が大きく、汚濁液などが下地に浸出しやすい場合に施される遮水工である。表面遮水工は法面と底面からなる下地全体を遮水膜で覆ってしまう工法で、遮水膜の材料としては、ゴムやその他のエラストマーからなるシート工法や吹きつけ材による工法、粘土やローム質土を締め固めたアースライニング工法やソイルセメントやアスファルトなどによるライニングを使用する方法がある。   Conventionally, toxic substances such as reservoirs, adjustment ponds, park ponds, wastewater treatment ponds, general waste disposal sites, etc. and toxic liquids leached into the ground and contaminated public water areas and groundwater In order to avoid this, a water barrier must be provided as necessary. As one of the water-impervious works, there is a surface impermeable work, which is generally performed when the water permeability coefficient of the base is large and the contaminated liquid easily leaches into the base. Surface impervious work is a method that covers the entire base consisting of the slope and bottom with a water impervious film. The material of the water impervious film is a sheet method made of rubber and other elastomers, a method using a spray material, clay, There are earth lining methods in which loamy soil is compacted and methods using soil cement or asphalt lining.

また、特許文献１のように遮水シート中に基布を積層したり、特許文献２に示すように基布を埋設したりした遮水シートも用いられている。このような遮水シートはシートの伸びを抑えることができるとともにシートの破損防止の効果を期待することができるものである。   Further, a water shielding sheet in which a base fabric is laminated in a water shielding sheet as in Patent Document 1 or a base cloth is embedded as shown in Patent Document 2 is also used. Such a water shielding sheet can suppress the elongation of the sheet and can be expected to prevent the sheet from being damaged.

特開２００２−３６１１９６号公報JP 2002-361196 A 特開平１０−８３５６号公報Japanese Patent Laid-Open No. 10-8356

廃棄物処分場や、調整池のように法面と底面を有するようなところの遮水の場合、法面と底面では事情が異なり夫々の面に特有の物性を持つ遮水材料を使用しなければならないということがある。下地のうち底面の部分は、凹凸を少なくするために土を入れて整地するために、遮水材料が下地の凹凸によって破れてしまうことなどの問題は少なくなるが、遮水工を施したのちに底面の下地が沈下してしまうことがあり、沈下が原因で遮水シートが引き伸ばされ、亀裂ができて漏水してしまうという問題があった。特に、シートの伸びを防ぐために伸縮性の少ない織物などの基布を埋設したようなものであると、基布の一部が切断してしまった場合に、基布が切断してしまった部分のみが伸びに対して弱くなりその部分の遮水シートの伸縮性だけで伸びを許容せざるを得なくなるので、かえって亀裂を生じやすくなるといえる。   In the case of water shielding where there is a slope and bottom, such as a waste disposal site or a regulating pond, the situation differs between the slope and bottom, and a water shielding material with specific physical properties must be used on each side. There is something that must be done. Since the bottom part of the ground is leveled with soil to reduce unevenness, the problem of the water shielding material being torn by the unevenness of the ground is reduced. In some cases, the base of the bottom surface sinks, and the water-impervious sheet is stretched due to the sinking, causing a crack and leaking water. In particular, when a base fabric such as a less stretchable woven fabric is embedded to prevent the sheet from being stretched, when the base fabric is partially cut, the portion where the base fabric is cut Since only it becomes weak with respect to elongation and it is necessary to allow elongation only by the stretchability of the water shielding sheet at that portion, it can be said that cracks are more likely to occur.

逆に、法面への敷設の場合、法面に敷設するシートは勾配面上に斜方向に敷設されるので常に伸ばされる力がかかることになるが、伸縮性を有するシートを用いていると伸縮性を有することが逆に欠点となってシートの底面に近い部分に弛みができたり、また整地が充分に成されていない場合、岩石の先端や草木、土中小動物などにより亀裂を生じ破損したりすることがあり、漏水の原因となることがあった。また、法面が特に急勾配となっているところには、伸びの問題で敷設できず、遮水シートを使用する遮水工の場合、図６に示すように法面１２の下地１１の勾配はどうしてもゆるやかなものとなって底面１３の面積も小さくなり、占有面積のわりに容積が小さくならざるを得なかった。本発明は、以上のような問題点を解決し法面のシートに弛みができたり岩石の先端などによって破損を生じたりすることがなく、急勾配の法面にも敷設することが可能であり、また底面が沈下しても充分、下地に沿うことができるような遮水工の施工構造の提供を目的とする。   On the contrary, in the case of laying on the slope, the sheet laid on the slope is laid obliquely on the slope surface, so that it always takes a force to be stretched, but if a stretchable sheet is used On the other hand, if it has stretchability, it becomes a defect, and the part near the bottom of the sheet can be loosened, and if the leveling is not enough, the rock tip, vegetation, soil small animals, etc. will crack and break Sometimes causing water leakage. In addition, when the slope is particularly steep, it cannot be laid due to the problem of elongation, and in the case of a water shielding work using a water shielding sheet, the slope of the base 11 of the slope 12 as shown in FIG. As a result, it became gradual and the area of the bottom surface 13 was reduced, and the volume had to be reduced instead of the occupied area. The present invention solves the above problems and does not cause slack in the slope sheet or breakage due to the tip of the rock, and can be laid on steep slopes. Also, it is an object of the present invention to provide a construction structure for a water shielding work that can sufficiently follow the base even if the bottom surface sinks.

上記のような目的を達成するために本発明の請求項１では、法面と底面を有する下地上に土木用の遮水シートを敷設する施工構造において、法面には基布を遮水膜中に埋設した法面用遮水シートを敷設し、底面には遮水膜のみからなる底面用遮水シートを敷設しており、法面用遮水シートに用いる基布として伸びが１５〜３５％で強度が１００〜７００Ｎ／ｃｍの基布を用いたことを特徴とする。   In order to achieve the above object, according to claim 1 of the present invention, in a construction structure in which a water shielding sheet for civil engineering is laid on a base having a slope and a bottom, a base fabric is provided on the slope. A sloped water impermeable sheet embedded in the floor, and a bottom impermeable sheet consisting of only a water impervious film is laid on the bottom, and stretch is 15 to 35 as a base fabric used for the sloped water impermeable sheet. %, And a base fabric having a strength of 100 to 700 N / cm is used.

請求項２では遮水膜が熱可塑性樹脂である請求項１記載の土木用遮水シートの施工構造としている。   According to a second aspect of the present invention, there is provided a construction structure for a civil engineering water-insulating sheet according to claim 1, wherein the water-shielding film is a thermoplastic resin.

請求項３では遮水膜が加硫ゴムである請求項１記載の土木用遮水シートの施工構造としている。   According to a third aspect of the present invention, there is provided a construction structure for a civil engineering water-impervious sheet according to claim 1, wherein the water-impervious film is vulcanized rubber.

請求項４では基布の素材がポリエステル繊維である請求項１記載の土木用遮水シートの施工構造としている。   According to a fourth aspect of the present invention, there is provided a construction structure for the civil engineering water-impervious sheet according to the first aspect, wherein the material of the base fabric is a polyester fiber.

本発明では、法面と底面を有する下地上に土木用の遮水シートを敷設する施工構造において、法面には遮水膜中に基布を埋設した遮水シートを敷設しているので、遮水シートが伸びてしまうことがなく、急勾配を有する法面に敷設してもシートに弛みができにくく、耐衝撃性に優れ、また引裂抵抗性も優れている。そして、底面には遮水膜のみからなるシートを敷設しているので、整地するために入れた土が沈下してしまったときでも、シート全体の伸縮性によって伸びを許容することができ、沈下した下地に沿うことができるのでシートが引裂かれてしまうこともない。   In the present invention, in the construction structure of laying a water-proof sheet for civil engineering on a foundation having a slope and a bottom surface, the slope is laid with a water-proof sheet in which a base fabric is embedded in a water-shield film. The water-impervious sheet does not stretch, and even when laid on a slope with a steep slope, the sheet is difficult to loosen, has excellent impact resistance, and has excellent tear resistance. And since a sheet consisting only of a water-impervious film is laid on the bottom surface, even when the soil put in to level the ground has subsided, the stretch of the entire sheet can be allowed to stretch, The sheet is not torn because it can follow the ground.

以下、更に本発明の実施例を添付図面に従って説明する。図１に示されるのは、本発明の施工構造によって施工された遮水工の構造を示す断面図であり、図２は本発明にて法面への敷設に使用される法面用遮水シートの断面図、図３は底面への敷設に使用される底面用遮水シートの断面図である。下地１は埋め立て地における廃棄物処分場であり、横四方の法面２と底面３によって囲まれた空間を有し、廃棄物を運び込んでこの空間中に廃棄物を積層し埋めてゆくものである。この法面２と底面３のうち法面２には図２に示すような基布４を遮水膜５中に埋設した法面用遮水シート６を敷設している。そして底面３には図３に示す底面用遮水シート７を敷設しており、法面２の法面用遮水シート６と端部で接合されている。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing the structure of a water shield constructed by the construction structure of the present invention, and FIG. 2 is a water shield for a slope used for laying on a slope in the present invention. FIG. 3 is a cross-sectional view of the bottom water-proof sheet used for laying on the bottom surface. The ground 1 is a waste disposal site in a landfill, and has a space surrounded by a slope 2 and a bottom 3 on the sides, and carries waste and stacks and fills the waste in this space. is there. The slope 2 of the slope 2 and the bottom 3 is laid with a sloped water shielding sheet 6 in which a base cloth 4 as shown in FIG. A bottom surface impermeable sheet 7 shown in FIG. 3 is laid on the bottom surface 3, and is joined to the slope surface impermeable sheet 6 on the slope 2 at the end.

法面２に敷設する法面用遮水シート６は遮水膜５中に補強用の基布４を埋設したものであり、基布４は遮水シートに引裂抵抗性を付与するためと、耐衝撃性を増すために埋設されるもので、本発明においてその基布４として用いられるのは伸びが１５〜３５％で強度が１００〜７００Ｎ／ｃｍの基布である。その素材としてはポリエチレン、ポリエステル、ポリ塩化ビニル、ポリプロピレン、ポリアミド、芳香族ポリアミド、ポリビニルアルコール、ポリウレタン等の有機合成樹脂からなるフィルムや、同様に合成樹脂からなる糸や偏平テープ状のものを編織したり、単にクロスして重ね合わせ部分を熱融着しネット状にしたりしたもの、また粗目の不織布によってネットを形成したもの等、その他、ガラス繊維等の無機繊維や金属繊維からなる織物等が挙げられる。その中でもポリエステル繊維からなる織布を用いることが高強度で耐熱性、耐水性にも優れ、汎用品であることから価格的にも安価であるという理由から好ましい。   The slope-impervious sheet 6 laid on the slope 2 has a reinforcing base cloth 4 embedded in the water-impervious film 5, and the base cloth 4 imparts tear resistance to the water-impervious sheet. In order to increase impact resistance, the base fabric 4 used in the present invention is a base fabric having an elongation of 15 to 35% and a strength of 100 to 700 N / cm. As the material, we knitted a film made of organic synthetic resin such as polyethylene, polyester, polyvinyl chloride, polypropylene, polyamide, aromatic polyamide, polyvinyl alcohol, polyurethane, etc., as well as yarns and flat tapes made of synthetic resin. Or a cloth that is simply crossed and heat-sealed on the overlapped portion to form a net, or a net formed of a coarse nonwoven fabric, and other fabrics made of inorganic fibers such as glass fibers or metal fibers It is done. Among them, it is preferable to use a woven fabric made of polyester fiber because it is high in strength, excellent in heat resistance and water resistance, and is inexpensive because it is a general-purpose product.

基布４の伸びが１５％未満であると地盤沈下があった際などに伸びきってしまって糸が切れてしまうといった問題があり、３５％を超えると法面でのシートが滑りやすく伸びやすくなってしまうのでゴムのストレスが大きくなり耐久性の面で影響を受けてしまうので好ましくない。また、強度が１００Ｎ／ｃｍ未満であると強度不足で引裂衝撃などの物性が弱くなるという問題があり、７００Ｎ／ｃｍを超えるとシートの剛性が高くなりすぎてシート敷設時の施工性が悪くなるので好ましくない。   If the elongation of the base fabric 4 is less than 15%, there will be a problem that the thread will break when the ground subsidence occurs, and if it exceeds 35%, the sheet on the slope will be slippery and easy to stretch. As a result, the stress of the rubber increases and the durability is affected, which is not preferable. Further, if the strength is less than 100 N / cm, there is a problem that physical properties such as tearing impact are weak due to insufficient strength, and if it exceeds 700 N / cm, the rigidity of the sheet becomes too high and the workability at the time of laying the sheet deteriorates. Therefore, it is not preferable.

以上のような物性を持たせるためには糸番手は３００ｄ〜１５００ｄ、厚みが０．２５ｍｍ〜０．６ｍｍ、密度が２５本／５ｃｍ〜４０本／５ｃｍ幅であるものが好適に用いられる。   In order to have the physical properties as described above, yarn numbers of 300d to 1500d, a thickness of 0.25 mm to 0.6 mm, and a density of 25/5 cm to 40/5 cm are preferably used.

この法面用遮水シート６の厚みは０．８〜３．０ｍｍのものが使用され厚みが０．８ｍｍ未満であると基布４に被覆する遮水膜５の厚みが薄すぎて耐衝撃性に劣り、また３．０ｍｍを越えるとシート同志の接合部において段差が大きくなってしまい好ましくない。以上のように、法面２に基布４を埋設した遮水シートを敷設しているので、法面２の勾配は従来の法面１２の勾配よりも急勾配にすることができ、図１における斜線の部分において容積を大きく取ることができる。   If the thickness of the water impervious sheet 6 for slope is 0.8 to 3.0 mm and the thickness is less than 0.8 mm, the thickness of the water impervious film 5 covering the base fabric 4 is too thin, and the impact resistance. If the thickness exceeds 3.0 mm, the step becomes large at the joint between the sheets, which is not preferable. As described above, since the water shielding sheet having the base fabric 4 embedded in the slope 2 is laid, the slope of the slope 2 can be steeper than the slope of the conventional slope 12. The volume can be increased in the shaded area.

底面３に敷設する底面用遮水シート７は遮水膜８のみからなるシートであり、遮水膜８は、エチレン・プロピレン・ターポリマー、ブチルゴム、クロロプレンゴム、ニトリルゴム、スチレンブタジエンゴム、クロロスルフォン化ポリエチレン等の加硫ゴム、あるいはポリ塩化ビニル樹脂、塩素化ポリエチレン樹脂、エチレンビニルアセテート樹脂、ポリエチレン樹脂等の熱可塑性樹脂からなっている。その厚みは０．８〜３．０ｍｍのものが使用され厚みが０．８ｍｍ未満であると基布４に被覆する遮水膜５の厚みが薄すぎて耐衝撃性に劣り、また３．０ｍｍを越えるとシート同志の接合部において段差が大きくなってしまい好ましくない。   The bottom water shielding sheet 7 laid on the bottom surface 3 is a sheet made of only the water shielding film 8. The water shielding film 8 is composed of ethylene / propylene terpolymer, butyl rubber, chloroprene rubber, nitrile rubber, styrene butadiene rubber, chlorosulfone. Vulcanized rubber such as chlorinated polyethylene or thermoplastic resin such as polyvinyl chloride resin, chlorinated polyethylene resin, ethylene vinyl acetate resin, polyethylene resin. When the thickness is 0.8 to 3.0 mm and the thickness is less than 0.8 mm, the thickness of the water shielding film 5 covering the base fabric 4 is too thin, resulting in poor impact resistance. Exceeding this is undesirable because the step becomes large at the joint between the sheets.

また、法面２に敷設している法面用遮水シート６と底面３に敷設している底面用遮水シート７とは接合されているが、その接合方法としては、図４に示すように遮水膜５、８として加硫ゴムを使用している場合、法面用遮水シート６と底面用遮水シート７とのラップ部にキュアテープ９を未加硫の状態で介在させ加熱加圧して架橋接合する方法や、ゴム系やオレフィン系等の接着剤を用いて接合する方法、オレフィン系の熱可塑性樹脂を介在させて熱融着する方法などが用いられる。また、遮水膜５、８が熱可塑性樹脂の場合、熱風融着、熱融着、液溶着する方法が用いられる。   Moreover, although the water-impervious sheet 6 for slopes laid in the slope 2 and the water-impervious sheet 7 for bottom faces laid in the bottom face 3 are joined, as the joining method, as shown in FIG. When vulcanized rubber is used as the water-impervious films 5 and 8, the cured tape 9 is interposed between the sloped water-impervious sheet 6 and the bottom impermeable sheet 7 in an unvulcanized state and heated. A method of pressurizing and cross-linking, a method of bonding using an adhesive such as rubber or olefin, and a method of heat-sealing with an olefin-based thermoplastic resin are used. Further, when the water shielding films 5 and 8 are thermoplastic resins, hot air fusion, thermal fusion, and liquid welding are used.

本発明に用いられる法面用遮水シート６の物性は、引張性能は、３０％伸び時の引張強さが５ｋｇｆ／ｃｍ以上で、切断時の伸び率は２００％以上、引裂性能は、引裂強さが５ｋｇｆ／ｃｍ以上であることが好ましい。また底面用遮水シート７としては３００％モジュラスが５０〜１００ｋｇｆ／ｃｍ2 、切断時の伸び率は４５０％以上であることが好ましい。なお、引張性能の値はＪＩＳ Ｋ ６３０１に準拠して引張速度は５００ｍｍ／ｍｉｎ、試験片は法面用遮水シートがＪＩＳ１号ダンベル、底面用遮水シートがＪＩＳ３号ダンベルを使用して測定したものとし、引裂性能の値はＪＩＳ Ｋ ６３０１に準拠して引張速度は５００ｍｍ／ｍｉｎ、試験片はＪＩＳＢ型ダンベルを使用して測定したものとする。 As for the physical properties of the sloped water shielding sheet 6 used in the present invention, the tensile performance is that the tensile strength at 30% elongation is 5 kgf / cm or more, the elongation at cutting is 200% or more, and the tearing performance is tearing. The strength is preferably 5 kgf / cm or more. Further, the bottom surface water-impervious sheet 7 preferably has a 300% modulus of 50 to 100 kgf / cm 2 and an elongation rate at the time of cutting of 450% or more. The tensile performance value was measured in accordance with JIS K 6301, the tensile speed was 500 mm / min, and the test piece was measured using the JIS No. 1 dumbbell for the sloped water shielding sheet and the JIS No. 3 dumbbell for the bottom water shielding sheet. Assume that the tear performance value is measured according to JIS K 6301, the tensile speed is 500 mm / min, and the test piece is measured using a JISB type dumbbell.

法面用遮水シート６として使用する基布４を埋設した遮水シートの伸長特性および耐衝撃性を調べてみた。実施例としてエチレン・プロピレン・ターポリマーの加硫ゴムシート内にポリエステル繊維を用いた平織りで、（５００Ｄ×５００Ｄ）／（３０×３０／５ｃｍ）の基布を埋設した厚み１．５ｍｍのシートを使用した。 The elongation characteristic and the impact resistance of the water shielding sheet embedded with the base fabric 4 used as the sloped water shielding sheet 6 were examined. As an example, a plain weave using polyester fibers in a vulcanized rubber sheet of ethylene / propylene / terpolymer and a base fabric of (500 D × 500 D ) / (30 × 30/5 cm) embedded in a thickness of 1.5 mm A sheet was used.

比較例１Comparative Example 1

比較例としては同材質、同厚みで基布を埋設していないところのみが実施例と異なるシートを用いた。   As a comparative example, a sheet different from the example was used only in the same material, the same thickness, and the base fabric was not embedded.

伸長特性はＪＩＳ Ｋ ６３０１に準拠して試験片はＪＩＳ１号ダンベルを用い、引張速度は５００ｍｍ／ｍｉｎで測定した。両者の伸びに対して応力をプロットしたグラフを図５に示す。   The elongation characteristics were measured in accordance with JIS K 6301 using a JIS No. 1 dumbbell as the test piece and a tensile speed of 500 mm / min. FIG. 5 is a graph in which stress is plotted against both elongations.

更に、耐衝撃性については実施例と比較例の両シートを夫々鉄板の上に置き、先端に０．５Ｒの刃をつけた８．３ｋｇの荷重を落下させ、シートが破断しない最高高さを調べた。その結果を表１に示す。   Furthermore, with regard to impact resistance, both the sheet of the example and the comparative example are placed on the iron plate, the load of 8.3 kg with a 0.5R blade is dropped, and the maximum height at which the sheet does not break is set. Examined. The results are shown in Table 1.

Figure 2005133415
Figure 2005133415

以上のように、本発明によって使用される法面用遮水シートは、低伸長時には基布による初期の補強性能を発揮するとともに、基布の切断後には加硫ゴム特有の高い伸長性能を有していることがわかる。また、衝撃に対しても基布による補強効果があらわれていることがわかる。   As described above, the sloped water impermeable sheet used according to the present invention exhibits the initial reinforcement performance by the base fabric at the time of low elongation, and has high elongation performance unique to vulcanized rubber after the base fabric is cut. You can see that Moreover, it turns out that the reinforcement effect by a base fabric also appears with respect to the impact.

本発明は貯水池、調整池、公園池、廃液処理池、一般廃棄物処分場、埋め立て地などにおいて土木用遮水シートを施工する際に適用することができる。   The present invention can be applied when constructing a civil engineering impermeable sheet in a reservoir, a regulating pond, a park pond, a waste liquid treatment pond, a general waste disposal site, a landfill, or the like.

本発明に係る遮水シートの施工構造を示す断面図である。It is sectional drawing which shows the construction structure of the water shielding sheet which concerns on this invention. 本発明の遮水シートの施工構造において法面に敷設する法面用遮水シートの断面図である。It is sectional drawing of the water shielding sheet for slopes laid in a slope in the construction structure of the water shielding sheet of this invention. 本発明の遮水シートの施工構造において底面に敷設する遮水シートの断面図である。It is sectional drawing of the water shielding sheet laid in the bottom face in the construction structure of the water shielding sheet of this invention. 法面用遮水シートと遮水シートの接合構造を示す断面図である。It is sectional drawing which shows the joining structure of the water impervious sheet for slopes, and a water impervious sheet. 遮水シートの伸びに対して応力を示すグラフである。It is a graph which shows stress with respect to elongation of a water-impervious sheet. 従来の遮水シートの施工構造を示す断面図である。It is sectional drawing which shows the construction structure of the conventional water shielding sheet.

符号の説明Explanation of symbols

１ 下地
２ 法面
３ 底面
４ 基布
５ 遮水膜
６ 法面用遮水シート
７ 底面用遮水シート
８ 遮水膜
９ キュアテープ
１１ 下地
１２ 法面
１３ 底面
DESCRIPTION OF SYMBOLS 1 Ground surface 2 Slope 3 Bottom surface 4 Base cloth 5 Water shielding film 6 Water shielding sheet for slope 7 Water shielding sheet for bottom surface 8 Water shielding film 9 Cure tape 11 Ground 12 Slope 13 Bottom surface

Claims (4)

法面と底面を有する下地上に土木用の遮水シートを敷設する施工構造において、法面には基布を遮水膜中に埋設した法面用遮水シートを敷設し、底面には遮水膜のみからなる底面用遮水シートを敷設しており、法面用遮水シートに用いる基布として伸びが１５〜３５％で強度が１００〜７００Ｎ／ｃｍの基布を用いたことを特徴とする土木用遮水シートの施工構造。   In a construction structure in which a water-proof sheet for civil engineering is laid on a ground with a slope and a bottom, a slope-proof sheet with a base fabric embedded in the water-shielding film is laid on the slope and the bottom is shielded. A water-impervious sheet for the bottom surface consisting only of a water film is laid, and a base cloth having an elongation of 15 to 35% and a strength of 100 to 700 N / cm is used as the base cloth used for the sloped water-impervious sheet. Construction structure of water-proof sheet for civil engineering. 遮水膜が熱可塑性樹脂である請求項１記載の土木用遮水シートの施工構造。   The construction structure of the waterproof sheet for civil engineering according to claim 1, wherein the waterproof film is a thermoplastic resin. 遮水膜が加硫ゴムである請求項１記載の土木用遮水シートの施工構造。   The construction structure of the water-proof sheet for civil engineering according to claim 1, wherein the water-blocking film is vulcanized rubber. 基布の素材がポリエステル繊維である請求項１記載の土木用遮水シートの施工構造。
The construction structure of the waterproof sheet for civil engineering according to claim 1, wherein the material of the base fabric is polyester fiber.
JP2003370296A 2003-10-30 2003-10-30 Execution structure of civil engineering cut off sheet Pending JP2005133415A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017100054A (en) * 2015-11-30 2017-06-08 有限会社Ｅａｒｔｈ Ｓｅｎｓｅ Closing method of storage part in final disposal site of waste and final disposal site of waste

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017100054A (en) * 2015-11-30 2017-06-08 有限会社Ｅａｒｔｈ Ｓｅｎｓｅ Closing method of storage part in final disposal site of waste and final disposal site of waste

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