JPH0312502Y2 - - Google Patents
Info
- Publication number
- JPH0312502Y2 JPH0312502Y2 JP7702183U JP7702183U JPH0312502Y2 JP H0312502 Y2 JPH0312502 Y2 JP H0312502Y2 JP 7702183 U JP7702183 U JP 7702183U JP 7702183 U JP7702183 U JP 7702183U JP H0312502 Y2 JPH0312502 Y2 JP H0312502Y2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- civil engineering
- water
- permeable
- engineering work
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 13
- 239000000057 synthetic resin Substances 0.000 claims description 13
- 239000006260 foam Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 10
- -1 polypropylene Polymers 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Description
【考案の詳細な説明】
本考案は、土木工事特にトンネル工事における
地肌岩盤面からの浸透水を排除すると共に、土砂
の流失を防止するために工事現場に埋設される土
木工事用透水シートに関するものである。[Detailed description of the invention] This invention relates to a permeable sheet for civil engineering work, which is buried in a construction site in order to eliminate seepage water from the ground rock surface and prevent soil from washing away during civil engineering work, particularly tunnel construction. It is.
従来、土木工事用透水シートとしては、ゴム，
合成樹脂，アスフアルト等の不透水性層を、カレ
ンダーによるトツピングあるいはコーテイングな
どの手段によつて不織布等の透水性層の片面に形
成し、一体化したものが提供されており、その物
性が種々研究されている。例えば、実公昭51−
37844号では、カレンダーによるトツピングある
いはコーテイングなどにより形成された不透水層
と不織布層との積層一体化シートであつて、その
不織布層の透水係数を規定することによつてその
構成に特徴をもたせている。このように、従来
種々の面から研究改良された土木工事用透水シー
トが提供されてはいるが、軽量でかつクツシヨン
性に優れ、しかも土木シートとしての強度面にお
いても充分満足できるものはいまだ見当らない。 Traditionally, permeable sheets for civil engineering work include rubber,
A water-impermeable layer such as a synthetic resin or asphalt is formed on one side of a water-permeable layer such as a non-woven fabric by calender topping or coating, and its physical properties have been studied in various ways. has been done. For example, Jikoko 51-
No. 37844 discloses a laminated integrated sheet consisting of an impermeable layer and a nonwoven fabric layer formed by topping or coating with a calendar, and the structure is characterized by specifying the permeability coefficient of the nonwoven fabric layer. There is. As described above, permeable sheets for civil engineering work have been provided that have been researched and improved from various aspects, but there is still no one that is lightweight, has excellent cushioning properties, and is fully satisfactory in terms of strength as a civil engineering sheet. do not have.
土木工事、特にトンネル工事の場合には、土木
工事用透水シートの透水性層をトンネル内の地肌
岩盤面に直に当接施工するものである。したがつ
て施工者にとつてはその作業性の上で当然のこと
ながら軽量であればあるほど好ましいものであ
る。又、トンネル内地肌岩盤面の凹凸粗れは、そ
こに多少のセメント塗工を施したとしてもこれを
解消することは不可能であり、したがつて当該地
肌岩盤面への土木工事用透水シートの密接施工は
非常に困難な作業である。 In the case of civil engineering work, particularly tunnel construction, the permeable layer of the permeable sheet for civil engineering work is constructed in direct contact with the ground rock surface inside the tunnel. Therefore, from the viewpoint of workability, it is natural that the lighter the material is, the more preferable it is for the constructor. In addition, it is impossible to eliminate the unevenness of the rock surface inside the tunnel even if a small amount of cement is applied to the surface. Close-contact construction is an extremely difficult task.
又一方、地肌岩盤からの自然圧の影響によつて
シートに割れが生じる等種々の問題が発生する。 On the other hand, various problems occur, such as cracking of the sheet due to the influence of natural pressure from the ground rock.
本考案者は、叙上のごとき土木工事における問
題点に鑑み、従来の土木工事用透水シートの欠点
を解消した新規な土木工事用透水シートを提供す
るべく研究の結果本考案を完成したものである。 In view of the above-mentioned problems in civil engineering work, the inventor completed the present invention as a result of research in order to provide a new permeable sheet for civil engineering work that eliminates the drawbacks of conventional permeable sheets for civil engineering work. be.
本考案は、ニードルパンチングによつて集積繊
維を３次元的に絡らませてなる不織繊維質シート
を透水性層とし、この不織繊維質シートの片面に
合成樹脂製性発泡体シートを不透水性かつ緩衝性
層として一体に積層してなる土木工事用透水シー
トに関するものである。さらに効果的には、透水
性層としてポリプロピレン短繊維の集積ウエツブ
をニードルパンチングにより、厚さ２mm以上にか
つ重さ80ｇ／m2以上、好ましくは80ｇ／m2〜160
ｇ／m2に形成した不織繊維質シートを用い、一方
不透水性かつ緩衝性層として厚さ３mm以上、発泡
倍率10〜30倍の合成樹脂製発泡体シートを用いる
ものである。すなわち、本考案は図面に示すごと
く透水性層１と不透水性層２との積層一体化で成
る土木工事用透水シート３の構成において、不透
水性層２として合成樹脂製発泡体シートを使用
し、透水性層１として不織繊維質シートを使用す
ることで、土木工事用透水シート３の軽量化及び
緩衝性付与の目的を達成するものであり、特に不
透水性層２として合成樹脂製発泡体シートを使用
した点に特徴を有する。 In this invention, a nonwoven fibrous sheet made by three-dimensionally entangling accumulated fibers by needle punching is used as a water permeable layer, and a synthetic resin foam sheet is placed on one side of this nonwoven fibrous sheet. This invention relates to a water-permeable sheet for civil engineering work that is integrally laminated as a water-permeable and buffering layer. More effectively, as a water-permeable layer, an accumulated web of short polypropylene fibers is formed by needle punching to a thickness of 2 mm or more and a weight of 80 g/m 2 or more, preferably 80 g/m 2 to 160 g/m 2 .
A non-woven fibrous sheet formed to a thickness of g/m 2 is used, while a synthetic resin foam sheet with a thickness of 3 mm or more and a foaming ratio of 10 to 30 times is used as a water-impermeable and cushioning layer. That is, the present invention uses a synthetic resin foam sheet as the impermeable layer 2 in the structure of the permeable sheet 3 for civil engineering work, which is composed of an integrated laminated structure of a permeable layer 1 and an impermeable layer 2 as shown in the drawings. By using a non-woven fibrous sheet as the water-permeable layer 1, the purpose of reducing the weight of the water-permeable sheet 3 for civil engineering work and imparting cushioning properties is achieved. It is unique in that it uses a foam sheet.
土木工事は一般に、かなり過酷な条件下で行わ
れる場合が多い。 Civil engineering work is generally carried out under extremely harsh conditions.
したがつて、単に不織繊維質シートに合成樹脂
製発泡体シートを積層一体化することによつて、
軽量化されかつ緩衝性の付与された土木工事用透
水シートを得ただけでは、その強度面において一
部の土木工事にしか適用できず、その使用範囲は
限られたものでしかない。 Therefore, by simply laminating and integrating a synthetic resin foam sheet onto a nonwoven fibrous sheet,
Even if a water-permeable sheet for civil engineering work that is lightweight and has cushioning properties is obtained, it can only be applied to some civil engineering works due to its strength, and its range of use is limited.
本考案は、軽量で緩衝性に優れ、一部土木工事
にのみ適用する使用範囲の限られた土木工事用透
水シートを提供すると同時に、土木工事用透水シ
ートを構成する不織繊維質シート及び合成樹脂製
発泡体シートの形成条件を特定することによつ
て、軽量で緩衝性に優れており、しかもほとんど
の土木工事に耐え得るだけの強度をもつた土木工
事用透水シートを提供することにも成功したもの
である。すなわち、ポリプロピレン短繊維の集積
ウエツプにニードルパンチングを施し、厚さ２mm
以上重さ80ｇ／m2以上の条件を満たすように形成
された不織繊維質シートを用い、この片面に厚さ
３mm以上発泡倍率10〜30倍の条件を満たすように
形成された合成樹脂製発泡シートを積層一体化す
ることによつて最も優れた土木工事用透水シート
が得られることを見出したのである。 The present invention provides a water-permeable sheet for civil engineering work that is lightweight, has excellent cushioning properties, and has a limited scope of use that can only be applied to some civil engineering works. By specifying the conditions for forming resin foam sheets, we have been able to provide water-permeable sheets for civil engineering work that are lightweight, have excellent cushioning properties, and are strong enough to withstand most civil engineering works. It was a success. That is, needle punching is applied to the accumulated web of short polypropylene fibers to a thickness of 2 mm.
A synthetic resin sheet made of a non-woven fibrous sheet with a weight of 80 g/ m2 or more, and a synthetic resin sheet with a thickness of 3 mm or more on one side and an expansion ratio of 10 to 30 times. It was discovered that the most excellent water-permeable sheet for civil engineering work could be obtained by laminating and integrating foam sheets.
つまり、厚さ３mm以上発泡倍率10〜30倍の合成
樹脂製発泡体シート層においては、不透水機能を
果たすと共に、土木工事特にトンネル工事に埋設
適用した場合その嵩高性によつて、トンネル内地
肌岩盤の凹凸粗面への優れた密接性を発揮し、し
かもその優れた緩衝性がトンネル内地肌岩盤から
の自然圧を吸収し、長期間の埋設においても土木
工事用透水シートに割れを生ずる等その機能が減
失することがないのである。この場合、厚さ３mm
に満たないと嵩高性の点で充分でなく、又発泡倍
率が10倍に満たないと嵩高性と共に緩衝性が充分
でなく、30倍をこえると土木工事用としての充分
な強度が得られないのである。合成樹脂製発泡体
シートの発泡状態は独立気泡である。つまり不透
水製であるために独立気泡を形成していなければ
ならない。 In other words, a synthetic resin foam sheet layer with a thickness of 3 mm or more and a foaming ratio of 10 to 30 times has a water-impermeable function, and when buried in civil engineering work, especially tunnel construction, its bulkiness makes it difficult to penetrate the tunnel interior. It exhibits excellent adhesion to the uneven surface of the rock, and its excellent cushioning properties absorb the natural pressure from the rock surface inside the tunnel, preventing cracks in permeable sheets for civil engineering work even when buried for long periods of time. The function will not be lost. In this case, the thickness is 3mm
If the foaming ratio is less than 10 times, the bulkiness will not be sufficient, and if the foaming ratio is less than 10 times, the bulkiness and cushioning properties will not be sufficient, and if it exceeds 30 times, sufficient strength for civil engineering work will not be obtained. It is. The foamed state of the synthetic resin foam sheet is closed cells. In other words, since it is made of water-impermeable material, it must form closed cells.
また、使用する合成樹脂としては、ポリエチレ
ン、ポリウレタンなどが挙げられる。 In addition, examples of the synthetic resin used include polyethylene and polyurethane.
一方、ポリプロピレン短繊維の集積ウエツプにニ
ードルパンチングを施することによつて厚さ２mm
以上、重さ80ｇ／m2以上に形成した不織繊維質シ
ートを前述の合成樹脂製発泡体シートの積層一体
化の相手素材として使用するのは、土木工事用透
水シートとしての透水機能を果たすと共に、合成
樹脂性発泡シート層との兼合において、土木工事
用としての充分な強度と軽量化及び嵩高性のバラ
ンスを保つためのものである。すなわち、厚さ２
mm以上、重さ80ｇ／m2以上の不織繊維質シートを
使用した場合に、はじめて強度と軽さ及び嵩高性
が最も好ましくバランスされるのである。On the other hand, by applying needle punching to the accumulated web of polypropylene short fibers, a thickness of 2 mm was obtained.
As mentioned above, the use of a non-woven fibrous sheet with a weight of 80 g/m2 or more as a mating material for lamination and integration of the synthetic resin foam sheet described above has the water permeability function as a water permeable sheet for civil engineering work. In addition, in combination with the synthetic resin foam sheet layer, it is intended to maintain a balance between sufficient strength for civil engineering work, weight reduction, and bulkiness. That is, thickness 2
Strength, lightness, and bulkiness are most preferably balanced only when a nonwoven fibrous sheet with a width of 80 g/m 2 or more and a weight of 80 g/m 2 or more is used.
又、本考案において使用する不織繊維質シート
は、その形成繊維の長短を問わないが、しかし短
繊維の集積ウエツブにニードルパンチングを施し
たものであれば強度面において特に優れたものと
なる。さらに又、繊維の種類としてポリプロピレ
ン繊維を選択使用することは耐アルカリ性の点に
おいて、特に土木工事における対セメント対策と
して好ましいものである。 Furthermore, the nonwoven fibrous sheet used in the present invention does not matter whether the fibers are long or short, but if it is made by needle-punching an accumulated web of short fibers, it will be particularly excellent in terms of strength. Furthermore, selecting polypropylene fiber as the type of fiber is preferable in terms of alkali resistance, especially as a countermeasure against cement in civil engineering works.
図面は本考案の土木工事用透水シートの断面模
式図である。
１……透水性層、２……不透水性層。
The drawing is a schematic cross-sectional view of the permeable sheet for civil engineering work of the present invention. 1... Water-permeable layer, 2... Water-impermeable layer.
Claims (1)
ルバンチングを施して、ポリプロピレン短繊維を
３次元的に絡ませた厚さ２mm以上重さ80ｇ／m2以
上である不織繊維質シートを透水性層とし、当該
透水性層の片面に厚さ３mm以上発泡倍率10〜30倍
である独立気泡の合成樹脂製発泡体シートを不透
水性かつ緩衝性層として一体に積層してなる土木
工事用透水シート。 A nonwoven fibrous sheet with a thickness of 2 mm or more and a weight of 80 g/m 2 or more, which is made by applying needle bunching to an accumulated web of polypropylene short fibers and entwining the polypropylene short fibers three-dimensionally, is used as a water permeable layer, and the water permeability A water-permeable sheet for civil engineering work, which is formed by laminating a closed-cell synthetic resin foam sheet with a thickness of 3 mm or more and a foaming ratio of 10 to 30 times on one side of the layer as an impermeable and cushioning layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7702183U JPS59181738U (en) | 1983-05-24 | 1983-05-24 | Water permeable sheet for civil engineering work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7702183U JPS59181738U (en) | 1983-05-24 | 1983-05-24 | Water permeable sheet for civil engineering work |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59181738U JPS59181738U (en) | 1984-12-04 |
| JPH0312502Y2 true JPH0312502Y2 (en) | 1991-03-25 |
Family
ID=30207068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7702183U Granted JPS59181738U (en) | 1983-05-24 | 1983-05-24 | Water permeable sheet for civil engineering work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59181738U (en) |
-
1983
- 1983-05-24 JP JP7702183U patent/JPS59181738U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59181738U (en) | 1984-12-04 |
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