JPH0440903Y2 - - Google Patents
Info
- Publication number
- JPH0440903Y2 JPH0440903Y2 JP18283786U JP18283786U JPH0440903Y2 JP H0440903 Y2 JPH0440903 Y2 JP H0440903Y2 JP 18283786 U JP18283786 U JP 18283786U JP 18283786 U JP18283786 U JP 18283786U JP H0440903 Y2 JPH0440903 Y2 JP H0440903Y2
- Authority
- JP
- Japan
- Prior art keywords
- water
- sheet
- waste
- network structure
- dumping
- 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
- 239000000835 fiber Substances 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 27
- 239000002699 waste material Substances 0.000 description 15
- 239000010802 sludge Substances 0.000 description 11
- 239000010410 layer Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000011041 water permeability test Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Laminated Bodies (AREA)
Description
【考案の詳細な説明】
本考案は、廃棄物の投棄処分場投棄池の内面に
敷設し、投棄処分場からの漏水を防止するための
遮水シートに関するものである。[Detailed Description of the Invention] The present invention relates to a water-shielding sheet that is laid on the inner surface of a dumping pond at a waste dumping site to prevent water leakage from the dumping site.
従来の技術
産業廃棄物、一般廃棄物処分場では、廃棄物中
を浸透した雨水や廃棄物自体に含まれる廃液等が
処理場から漏出して地下水、河川の汚染するのを
防止するため、軟質不透水性シート、例えば塩化
ビニルシートまたはゴムシートを投棄池内面に一
重張りし、この表面に砂撒きし、この砂層を投棄
物中を浸透して来た雨水等による汚水の濾過層及
び集水層として、また投棄物の衝撃吸収用として
シート底面に適宜配設された排水溝および排水管
に導き、池底に集水された汚水を排出処理するよ
うにしている。Conventional technology At industrial waste and general waste disposal sites, soft waste water is used to prevent rainwater that has penetrated into the waste and waste liquid contained in the waste itself from leaking out of the treatment plant and contaminating groundwater and rivers. A single layer of impermeable sheet, such as a vinyl chloride sheet or a rubber sheet, is placed on the inner surface of the dumping pond, and sand is sprinkled on this surface, and this sand layer is used as a filtration layer and water collection layer for sewage, such as rainwater, that has permeated through the dumped material. The sewage collected at the bottom of the pond is discharged and treated as a layer and to drain grooves and drain pipes appropriately arranged on the bottom of the seat to absorb the impact of the dumped material.
考案が解決しようとする問題点
しかしながら、上記遮水シートは一重張りのた
め、地盤沈下、重量投棄物の投棄による衝撃で破
れて地下水の汚染を生ずることがあり、また、破
れた場合、破損部分を速やかに補修し、漏水を防
止する必要があるが、破損箇所の発見が容易でな
く、長時間と多大な経費とを要することとなり、
環境保全上の大きな問題となつている。Problems to be solved by the invention However, since the above water-shielding sheet is made of a single layer, it may tear due to impact caused by ground subsidence or dumping of heavy waste materials, resulting in contamination of groundwater. It is necessary to promptly repair the water to prevent water leakage, but it is not easy to find the damaged parts, and it takes a long time and costs a lot of money.
This has become a major problem in terms of environmental conservation.
問題点を解決するための手段
本考案者らは、前記問題点に鑑み、破れ難く、
万一破れた場合、破損箇所を速やかに、かつ的確
に検知できる遮水シートについて検討を重ね、本
考案を完成するに到つた。Means for Solving the Problems In view of the above problems, the present inventors have developed a
In the event that it were torn, we conducted extensive research into creating a water-blocking sheet that would allow us to quickly and accurately detect the damaged area, and finally came up with this idea.
本考案に係る積層遮水シートは、繊維径0.2〜
４mmのフイラメントを３次元的に交絡し空隙率85
％以上、厚さ４〜50mmで形成した立体交絡網状構
造体の上面及び下面にそれぞれ軟質不透水性シー
トを積層してなることを特徴とするものである。 The laminated water-blocking sheet according to the present invention has a fiber diameter of 0.2~
4mm filaments are intertwined three-dimensionally to achieve a porosity of 85.
% or more and a thickness of 4 to 50 mm, and is characterized by laminating soft water-impermeable sheets on the upper and lower surfaces of a three-dimensional entangled network structure, respectively.
本考案積層遮水シートの一実施例を示すと、第
１図はその一部断面図で、弾性シート１、軟質不
透水性シートＢ２、ポリエステル系不織布を上面
と下面に各融着させた立体交絡網状構造体３、軟
質不透水性シートＡ４が、この順で積層されてい
る。 One embodiment of the laminated water-shielding sheet of the present invention is shown in Fig. 1, which is a partial sectional view showing a three-dimensional structure in which an elastic sheet 1, a soft water-impermeable sheet B2, and a polyester nonwoven fabric are fused to the upper and lower surfaces. The interlaced network structure 3 and the soft water-impermeable sheet A4 are laminated in this order.
弾性シート１は、ポリオレフイン、ポリ塩化ビ
ニル、ゴム等より形成され、長さ１〜５mm程度の
シートで、投棄場内面地肌に当接し、地肌上の尖
石等に対する緩衝材としての作用を営ませるため
に積層されていることが好ましい。 The elastic sheet 1 is made of polyolefin, polyvinyl chloride, rubber, etc., and has a length of about 1 to 5 mm, and is in contact with the inner surface of the dumping site to act as a buffer against stones, etc. on the surface. It is preferable that the layers be laminated.
前記弾性シート上に、不透水性シートＢ２とし
て厚さ１〜２mm程度の軟質塩化ビニルシートが熱
融着法により接合されている。なお、不透水性シ
ートは、前記塩化ビニルシートに限らず、投棄場
用としての耐食性と、引張り強さ、引裂き強さ等
の機械的強度を具えたものであればよく、合成樹
脂シート、合成ゴムシート、繊維製基布に樹脂、
ゴムを含浸またはラミネートしたものでもよい。 On the elastic sheet, a soft vinyl chloride sheet having a thickness of about 1 to 2 mm is bonded as a water-impermeable sheet B2 by a heat fusion method. Note that the water-impermeable sheet is not limited to the above-mentioned vinyl chloride sheet, but may be any sheet that has corrosion resistance for use in dumping sites and mechanical strength such as tensile strength and tear strength, and may include synthetic resin sheets, synthetic Rubber sheet, resin on fiber base fabric,
It may be impregnated with rubber or laminated with rubber.
次に立体交絡網状構造体３は、合成繊維または
金属繊維フイラメントを３次元立体的に交絡して
マツト状に形成したもので、好ましくはナイロン
フイラメントが用いられ、充分な空隙率と剛性を
必要とし、フイラメント径は0.2〜４mm程度が好
ましく、0.2mm以下では構造体に充分な剛性を付
与することができず、４mm以上とすると取扱性、
衝撃吸収性、経済性に劣り、適当でない。次に空
隙率としては無負荷で85％以上が必要であり、こ
れ以下では、投棄物の負荷により圧縮されたと
き、後述するシートが破れ汚泥水が浸入したとき
の汚泥水の流通路の確保が不充分となる。立体交
絡網状構造体の厚みは網状体の剛性にもよるが、
４mm〜50mmの範囲が好適で、４mm以下では前記汚
泥水の流通路の確保が充分に得られず、50mm以上
では、経済性、取扱い性が悪くなり、好ましくな
い。また、立体交絡網状構造体は、投棄池の法面
に敷設したとき、堆積した投棄物の荷重で圧縮さ
れても前記汚泥水の流通路としての必要な空隙を
確保する必要があることより、２Kg／cm2の載荷時
において変形残率が10％以上有ることが必要であ
る。そのためには、前記諸条件の他に、15N／
cm2・cm以上150N／cm2・cm以下の動的剛性試験値
を有する構造体であることが好ましい。前記不透
水性シートＢとは接着剤または融着により接着さ
れる。 Next, the three-dimensional entangled network structure 3 is formed into a mat shape by three-dimensionally entangling synthetic fibers or metal fiber filaments, and preferably uses nylon filament, and requires sufficient porosity and rigidity. The filament diameter is preferably about 0.2 to 4 mm; if it is less than 0.2 mm, it will not be possible to impart sufficient rigidity to the structure, and if it is more than 4 mm, it will not be easy to handle.
Poor shock absorption and economic efficiency, making it unsuitable. Next, the porosity needs to be 85% or more without any load; if it is less than this, when the sheet is compressed by the load of the dumped material, the sheet (described later) will be torn and the sludge water will have a flow path when it enters. becomes insufficient. The thickness of the three-dimensional entangled network structure depends on the rigidity of the network structure, but
A range of 4 mm to 50 mm is preferable; if it is less than 4 mm, a sufficient flow path for the sludge water cannot be secured, and if it is more than 50 mm, economical efficiency and handling properties will be poor, which is not preferable. In addition, when the three-dimensional entangled network structure is laid on the slope of a dumping pond, it is necessary to ensure the necessary voids as a flow path for the sludge water even if it is compressed by the load of the accumulated waste. It is necessary that the residual deformation rate be 10% or more when loaded with 2 kg/cm 2 . In order to do so, in addition to the above conditions, 15N/
It is preferable that the structure has a dynamic stiffness test value of not less than cm 2 ·cm and not more than 150 N/cm 2 ·cm. It is bonded to the water-impermeable sheet B using an adhesive or fusion.
立体交絡網状構造体上に不透水性シートＡ４が
接着剤又は融着により接着されている。なお、不
透水性シートＡも不透水性シートＢ同様適宜の材
質のものを用いることができる。 A water-impermeable sheet A4 is adhered onto the three-dimensional entangled network structure by adhesive or fusion. Note that, like the water-impermeable sheet B, the water-impermeable sheet A can be made of an appropriate material.
本考案積層遮水シートは、それぞれのシート、
立体交絡網状構造体を工場規模で得られる大きさ
に作製し、投棄場現場で接合、接着して形成し、
投棄場内面形状に合せて敷設されてもよく、また
予め積層して形成したものを敷設してもよい。 The laminated water-shielding sheet of this invention has each sheet,
A three-dimensional entangled network structure is manufactured to a size that can be obtained on a factory scale, and is formed by joining and gluing at the dumpsite site.
It may be laid according to the shape of the inner surface of the dumping site, or it may be laid by laminating layers in advance.
作 用
本考案に係る積層遮水シートは造成された投棄
場の内面に敷設され、投棄場からの汚泥水の漏出
防止及び漏れた場合、破損場所を速やかに検出す
ることができる。本考案の積層遮水シートの敷設
方法は、第２図の投棄場縦断面図に示すように、
斜面および底面の全面に敷設する場合と、同じく
第３図に示すように、投棄場の条件が良く、斜面
のみに敷設する場合とがある。第２図に即して説
明すると、予め廃棄物処分場底部の中央部、及び
周囲に格子状ブロツクにシート破損検知用の排水
溝５、排水管６を配設して置く。次に本考案積層
遮水シートを造成した投棄場内面に敷設する。前
記排水管の開口端部に積層遮水シートの端縁を差
し込み（第２図Ａ）、次いで砂込め（同図Ｂ）し、
シート端部を排水管に巻き付ける（同図Ｃ）。さ
らに、通常行われるようにシート上に適宜厚さの
盛土をして落着かせ、廃棄物が投棄可能となる。Function The laminated water-shielding sheet according to the present invention is laid on the inner surface of a constructed dumping site, and can prevent leakage of sludge from the dumping site and, in the event of leakage, quickly detect the location of damage. The method of laying the laminated water-shielding sheet of the present invention is as shown in the vertical cross-sectional view of the dumping site in Figure 2.
There are cases where it is laid all over the slope and the bottom, and there are cases where it is laid only on the slope if the conditions of the dumping site are favorable, as shown in Figure 3. Referring to FIG. 2, drain grooves 5 and drain pipes 6 for detecting sheet damage are arranged in advance in a lattice-like block at the center of the bottom of the waste disposal site and around the periphery. Next, the laminated waterproof sheet of the present invention is laid on the inner surface of the constructed dumping site. Insert the edge of the laminated water-shielding sheet into the open end of the drain pipe (Figure 2A), then fill it with sand (Figure 2B),
Wrap the edge of the sheet around the drain pipe (C in the same figure). Furthermore, as is normally done, embankment of an appropriate thickness is placed on the sheet and allowed to settle, allowing the waste to be dumped.
本考案の積層遮水シートは、不透水性シートＡ
および同シートＢの２層からなり、かつ中間に立
体交絡網状構造体を挟んだサンドイツチ構造とな
つているので、立体交絡網状構造体の弾性によ
り、投棄による衝撃を緩和し、破れ難い。 The laminated water-blocking sheet of the present invention is water-impermeable sheet A
Since it is composed of two layers of sheet B and sheet B, and has a sandwich structure with a three-dimensionally entangled network structure sandwiched between them, the elasticity of the three-dimensionally entangled network structure cushions the impact caused by dumping and is difficult to tear.
次に、万一シートが破れた場合、汚泥水は本考
案シートの立体交絡網状構造体の網目部分を流通
路として、最も最寄りのシート破損検知用排水管
に流入するので、検知用排水管のそれぞれの排水
出口を定期的に点検し、破損の有無および破損し
た場合、破損箇所を的確に知ることができる。 Next, in the event that the sheet is torn, the sludge water will flow into the nearest sheet breakage detection drain pipe using the mesh portion of the three-dimensional entangled network structure of the sheet of the present invention as a flow path. Each drainage outlet can be inspected regularly to determine whether or not there is damage, and if damage occurs, the location of the damage can be accurately determined.
この場合、上記の点検は相当の期間をおいて行
われることとなるので、シートが土圧で圧縮され
空隙が閉塞されてはならず、また、空隙があつて
も投棄埋め立ての終了するまで投棄物中を浸透し
てきた汚泥水に懸濁した微粒子により詰まること
なく、汚泥水が出口に流通することが必要であ
る。 In this case, the above inspection will be carried out after a considerable period of time, so the sheet should not be compressed by earth pressure and the voids should not be blocked, and even if there is a void, it should not be discarded until the dumping and reclamation is completed. It is necessary for the sludge water to flow to the outlet without being clogged by fine particles suspended in the sludge water that has permeated through the material.
本考案に用いる立体交絡網状体として動的剛性
試験値100N／cm2・cm、空隙率96％のものについ
て、網状体表面に、通常投棄場で底面にかかると
される荷重（1.4Kg／cm2）を負荷したとき、厚さ
20mmの場合、厚さは５mmに、厚さ10mmの場合、厚
さ２mmに各圧縮されたが、水量が無載荷時に比し
各若干落ちた程度で、充分な汚泥水の流通用空間
を保有していた。なお、変形残率は20mmの場合で
25％、10mmの場合で20％であつた。 The three-dimensionally entangled network used in this invention has a dynamic stiffness test value of 100N/cm 2 cm and a porosity of 96%, and the load that is normally applied to the bottom at a dumping site (1.4Kg/cm) is applied to the surface of the network. 2 ) Thickness when loaded
In the case of 20 mm, the thickness was compressed to 5 mm, and in the case of 10 mm, the thickness was compressed to 2 mm, but the amount of water was only slightly lower than when unloaded, and there was sufficient space for the circulation of sludge water. Was. Note that the residual deformation rate is 20 mm.
25%, and 20% for 10mm.
また、汚泥水の流入による上記立体交絡網状構
造体の目詰まり試験を行なつた。試験法として
は、標準廃棄物として都市ごみ焼却灰A10部、焼
却灰B19部、不燃物14.8部、ローム土12.6部、集
塵灰少量からなるものを最大密度の80％となるよ
うに突き固め、廃棄物の厚さ5.5cmとして表面に
水を降らせ、廃棄物中を通過させ、試験汚泥水を
調製した。この試験汚泥水を用い、水頭高さ
106.8cm、試料長さ20cm、試料幅10cm、流入濃度
100ppmとし、載荷圧1.4Kg／cm2で透水試験を行な
つた。結果を第４図に示す。同図で、縦軸は単位
幅に対する透水速度（cm／cm／sec）で、横軸は
総流出量（cm3／cm2）を示す。なお、図中曲線ａ
は、本考案の立体交絡網状構造体厚さ20mm、ｂは
厚さ10mmのもので、参考のため、市販のオレフイ
ン系樹脂で作られた単繊維積層のフエルトマツト
状濾材ｃ（無荷重厚さ37mm）、ｄ（同32mm）、ｅ（同
22mm）、ｆ（同25mm）に関しても同様の実験を行な
つた。なお、ｃ，ｄは粗い網目のものからなり、
ｅ，ｆは密な網目のものからなつていた。 In addition, a clogging test was conducted on the three-dimensionally entangled network structure by inflow of sludge water. As a test method, standard waste consisting of 10 parts of municipal waste incineration ash A, 19 parts of incineration ash B, 14.8 parts of incombustibles, 12.6 parts of loam soil, and a small amount of collected dust ash is compacted to 80% of the maximum density. A test sludge water was prepared by raining water on the surface of the waste to a thickness of 5.5 cm and passing it through the waste. Using this test sludge water, the water head height
106.8cm, sample length 20cm, sample width 10cm, inflow concentration
A water permeability test was conducted at a loading pressure of 1.4 Kg/cm 2 at 100 ppm. The results are shown in Figure 4. In the figure, the vertical axis represents the water permeation rate (cm/cm/sec) per unit width, and the horizontal axis represents the total outflow (cm 3 /cm 2 ). In addition, curve a in the figure
is the three-dimensional entangled network structure of the present invention with a thickness of 20 mm, and b is with a thickness of 10 mm. 37mm), d (32mm), e (32mm),
Similar experiments were conducted for f (22 mm) and f (25 mm). Note that c and d are made of coarse mesh,
e and f were made of dense mesh.
第４図から判るように市販品濾材は水の総流出
量の増加とともに透水速度が大きく低下し、一年
分雨水地下浸透量に到達する以前に通水不能とな
つたものもあるが、これらは自由水路が出来難い
ため、濾材内が詰まり易いためと考えられる。一
方、本考案の立体交絡網状構造体は特定条件下に
あることより水路が経時的にも確保されるため、
透水速度は変わらず、長期間の透水性が確保され
ている。 As can be seen from Figure 4, the water permeability rate of commercially available filter media decreases significantly as the total amount of water runoff increases, and some become unable to pass water before reaching the amount of rainwater that permeates into the ground for one year. This is thought to be due to the fact that it is difficult to form a free water channel, so the inside of the filter medium is easily clogged. On the other hand, the three-dimensional entangled network structure of the present invention secures water channels over time under specific conditions.
The water permeability rate remains unchanged, ensuring long-term water permeability.
考案の効果
本考案に係る積層遮水シートを廃棄物投棄場内
面に敷設することにより、上記のように廃棄物の
投棄時の衝撃に対して非常に破れ難く、万一破れ
てもその破損箇所を的確に知ること、およびその
機能が長期間にわたり保持される。従つて、破損
しても地下水に対する汚染を最小限に止めること
ができる。また砂を濾過集水層とするのと異な
り、投棄場斜面が急斜面でも敷設でき投棄場面積
を有効に利用できる利点があり、廃棄物投棄場の
遮水シートとして極めて有用である。Effects of the invention By laying the laminated water-shielding sheet according to the invention on the inner surface of the waste dumping site, as mentioned above, it is extremely difficult to tear due to the impact when dumping waste, and even if it is torn, the damaged area will be damaged. Accurate knowledge of the function and maintaining its function over a long period of time. Therefore, even if it is damaged, contamination of groundwater can be kept to a minimum. Also, unlike using sand as a filter water catchment layer, it has the advantage that it can be laid even on steep slopes of the dumpsite, making effective use of the dumpsite area, making it extremely useful as a water-shielding sheet for waste dumpsites.
第１図は本考案に係る積層遮水シートの断面図
で、第２図Ａ〜Ｃ及び第３図は、それぞれ遮水シ
ートの敷設法を示す投棄場の縦断面図で、第４図
は立体交絡網状構造体と市販濾材についての透水
速度と総透水量の関係を示す図面である。
１……弾性シート、２，４……不透水性シー
ト、３……立体交絡網状構造体、５……排水溝、
６……排水管。
Figure 1 is a cross-sectional view of the laminated water-shielding sheet according to the present invention, Figures 2A to C and 3 are longitudinal sectional views of a dumping site showing the method of laying the water-shielding sheet, and Figure 4 is It is a drawing showing the relationship between water permeation rate and total water permeation amount for a three-dimensionally entangled network structure and a commercially available filter medium. 1... Elastic sheet, 2, 4... Water impermeable sheet, 3... Three-dimensional entangled network structure, 5... Drainage ditch,
6... Drain pipe.
Claims (1)
交絡し空隙率85％以上、厚さ４〜50mmで形成した
立体交絡網状構造体の上面及び下面にそれぞれ軟
質不透水性シートを積層してなる積層遮水シー
ト。 A laminate made by laminating soft water-impermeable sheets on the top and bottom surfaces of a three-dimensionally entangled network structure formed by three-dimensionally entangling filaments with fiber diameters of 0.2 to 4 mm to have a porosity of 85% or more and a thickness of 4 to 50 mm. Waterproof sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18283786U JPH0440903Y2 (en) | 1986-11-29 | 1986-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18283786U JPH0440903Y2 (en) | 1986-11-29 | 1986-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6388429U JPS6388429U (en) | 1988-06-08 |
| JPH0440903Y2 true JPH0440903Y2 (en) | 1992-09-25 |
Family
ID=31129010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18283786U Expired JPH0440903Y2 (en) | 1986-11-29 | 1986-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0440903Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10202774A (en) * | 1997-01-21 | 1998-08-04 | Daiwabo Co Ltd | Laminated water-impervious sheet |
| JP2007186996A (en) * | 2007-04-20 | 2007-07-26 | Ever Kk | Structure of roof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3129013B2 (en) * | 1993-01-22 | 2001-01-29 | 株式会社大林組 | Waterproof sheet protection structure |
| JP3089877B2 (en) * | 1993-01-26 | 2000-09-18 | 株式会社大林組 | Impermeable sheet |
| JP3413616B2 (en) * | 1994-01-28 | 2003-06-03 | 三ツ星ベルト株式会社 | Detecting restoration body used for detecting and restoring water leakage and method of detecting and restoring water leakage |
| JPH11222831A (en) * | 1998-02-05 | 1999-08-17 | Maeda Kousen Kk | Cushion structure for civil engineering work |
-
1986
- 1986-11-29 JP JP18283786U patent/JPH0440903Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10202774A (en) * | 1997-01-21 | 1998-08-04 | Daiwabo Co Ltd | Laminated water-impervious sheet |
| JP2007186996A (en) * | 2007-04-20 | 2007-07-26 | Ever Kk | Structure of roof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6388429U (en) | 1988-06-08 |
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