JPH01226911A - Sheet for civil engineering work - Google Patents
Sheet for civil engineering workInfo
- Publication number
- JPH01226911A JPH01226911A JP5162788A JP5162788A JPH01226911A JP H01226911 A JPH01226911 A JP H01226911A JP 5162788 A JP5162788 A JP 5162788A JP 5162788 A JP5162788 A JP 5162788A JP H01226911 A JPH01226911 A JP H01226911A
- Authority
- JP
- Japan
- Prior art keywords
- water
- permeable layer
- sheet
- nonwoven fabric
- water permeability
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 230000035699 permeability Effects 0.000 claims abstract description 34
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 6
- 239000012466 permeate Substances 0.000 abstract description 5
- 230000008635 plant growth Effects 0.000 abstract description 4
- 238000007646 gravure printing Methods 0.000 abstract description 2
- 239000012209 synthetic fiber Substances 0.000 abstract description 2
- 229920002994 synthetic fiber Polymers 0.000 abstract description 2
- 239000011295 pitch Substances 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 6
- 239000003673 groundwater Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 241001122767 Theaceae Species 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、土木工事用にフィルター材、透水材として利
用されている土木用シートに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a civil engineering sheet that is used as a filter material and water permeable material for civil engineering work.
従来の土木用のスパンポンド法等で作られた不織布シー
ト（ジオテキスタイル）は、単一素材でできているので
、透水性が良く、土による目詰まりしにくいことから排
水用の材料として多く使用されている。Nonwoven fabric sheets (geotextiles) made using the conventional spunpond method for civil engineering are often used as drainage materials because they are made of a single material, have good water permeability, and are less likely to become clogged with soil. ing.
しかしながら、このような不織布シートは、透水性に優
れているため、不織布シートに沿う方向のみならず、こ
れと直交する方向にも水を良好に透過させてしまい、不
織布シートに沿った方向に排水させる用途にこのままで
使用しても充分ではなかった。そこで、不織布シートの
下面に不透水性フィルムを積層して不織布シート等と直
交する方向への透水性を抑制して不織布シートに沿った
方向への透水性を向上させる手段が採用されているが、
これでは不織布シートと直交する方向には全く透水性を
示さないので、植物の成育に必要な水分や地下水を湯養
するのに必要な量の水分を供給することができなくなる
欠点があった。However, since such nonwoven fabric sheets have excellent water permeability, they allow water to permeate not only in the direction along the nonwoven fabric sheet, but also in the direction perpendicular to this, and drain water in the direction along the nonwoven fabric sheet. However, even if used as is, it was not sufficient for the intended use. Therefore, a method has been adopted in which a water-impermeable film is laminated on the bottom surface of the non-woven fabric sheet to suppress water permeability in the direction perpendicular to the non-woven fabric sheet and improve water permeability in the direction along the non-woven fabric sheet. ,
This method has no water permeability at all in the direction perpendicular to the nonwoven fabric sheet, so it has the disadvantage that it cannot supply the amount of moisture necessary for plant growth or for cultivating underground water.
本発明は、かかる現状に鑑み、不織布シートに沿った方
向への透水性を損なうことなく、不織布シートと直交す
る方向にも適度の水分が透過しうる土木シートを提供す
ることを目的とするものである。In view of the current situation, it is an object of the present invention to provide a civil engineering sheet that allows an appropriate amount of moisture to permeate in a direction perpendicular to the nonwoven fabric sheet without impairing water permeability in the direction along the nonwoven fabric sheet. It is.
本発明は、かかる目的を達成するため、高透水性不織布
の片面に樹脂を未コーティング部を散点状に残しながら
コーティングして高透水性層と低透水性層とを形成した
ことを特徴とする土木用シートである。In order to achieve this object, the present invention is characterized in that a highly water permeable layer and a low water permeable layer are formed by coating one side of a highly water permeable nonwoven fabric with a resin while leaving uncoated portions scattered. This is a sheet for civil engineering.
〔作用］
本発明にお−ける土木用シートは、不織布よりなる高透
水性層を有するので、優れた吸水性能を有するとともに
、樹脂をコーティングしてなる低透水性層を有するので
、土中の水は主として高透水性層側からのみ吸水し、こ
の層に沿って横方向に移動して低透水性層側にはわずか
しか移動しないため、土中の排水方向を適宜に調整する
ことができる。また、低透水性層は、不織布に未コーテ
ィング部を散点状に残しながら樹脂コーティングするこ
とにより透水部を設けるので、開口部の大小、ピンチの
程度を選択してシートと直交する方向の透水性能を適宜
にコントロールすることができる。[Function] The civil engineering sheet of the present invention has a highly water-permeable layer made of nonwoven fabric, so it has excellent water absorption performance, and it has a low water-permeable layer coated with a resin, so it absorbs water in the soil. Water mainly absorbs only from the high permeability layer side, moves laterally along this layer, and moves only slightly to the low permeability layer side, so the direction of drainage in the soil can be adjusted accordingly. . In addition, the low water permeability layer is created by coating the nonwoven fabric with a resin coating while leaving uncoated parts in scattered spots, so the water permeability in the direction perpendicular to the sheet is determined by selecting the size of the openings and the degree of pinching. Performance can be controlled appropriately.
以下、本発明を図示の実施例に従って詳細に説明するこ
ととする。Hereinafter, the present invention will be explained in detail according to illustrated embodiments.
図において、１は、土木用ソートにして、該土木用シー
ト１は高透水性層２と低透水性層３からなっている。In the figure, 1 is a civil engineering sheet, and the civil engineering sheet 1 is composed of a high water permeability layer 2 and a low water permeability layer 3.
高透水性層２は、合成繊維スパンポンド不織布であって
、必要に応じてニードルパンチが施されている。不織布
の目付量は１００〜１０００ｇ／ｍ２が望ましいが、こ
れに限らない。また、ニードルパンチの程度は３０〜１
５０バンチ／ｉが望ましい。The highly water permeable layer 2 is made of synthetic fiber spunpond nonwoven fabric, and is needle-punched if necessary. The basis weight of the nonwoven fabric is preferably 100 to 1000 g/m2, but is not limited thereto. Also, the degree of needle punch is 30 to 1
50 bunches/i is desirable.
低透水性層３は、高透水性層２に未コーティングの開口
部４を散点状に残しながらコーティングした樹脂層から
なっている。樹脂コーティングはグラビア印刷等により
行われる。このさい、開口部４の大きさ、ピッチの程度
を調節することにより透水性を所望の程度にコントロー
ルすることができる。The low water permeability layer 3 is made of a resin layer coated on the high water permeability layer 2 while leaving uncoated openings 4 scattered therein. Resin coating is performed by gravure printing or the like. At this time, water permeability can be controlled to a desired level by adjusting the size and pitch of the openings 4.
低透水性層３における開口部４の面積比率（開口率）１
０％とし、高透水性層２の透水率を８×１０−２とする
と、土木用シート１の透水係数は８Ｘ１０”２ＸＩＸＩ
Ｏ−’＝８Ｘ１０−３となり、は −ぼ砂と同等の透水
係数になる。このように、その土質に応じた透水係数に
コントロールすることができ、余分な浸透を防止するこ
とが可能となる。Area ratio of openings 4 in low water permeability layer 3 (opening ratio) 1
0% and the water permeability of the highly permeable layer 2 is 8 x 10-2, the water permeability coefficient of the civil engineering sheet 1 is 8 x 10"2XIXI
O-' = 8X10-3, which is the same hydraulic conductivity as sand. In this way, the permeability coefficient can be controlled to suit the soil quality, making it possible to prevent excessive seepage.
第３図のように土中に地表と平行に高透水性層２を上側
とし、低透水性層３を下側となるように埋設する場合な
どには、下方からの地下水を遮断しうると共に、雨水よ
りの浸透水を速やかに吸収し、地表の状態を安定に保持
することができる。As shown in Figure 3, when buried in the soil parallel to the ground surface with the high permeability layer 2 on the top and the low permeability layer 3 on the bottom, it is possible to block groundwater from below and , it can quickly absorb water that permeates from rainwater and maintain a stable ground surface condition.
なお、土木用シートと直交する方向の透水性も土木用シ
ートに沿う方向の透水性を損なうことなく、僅かに付与
しであるので、例えば植物成育に必要な分のみ透水した
り、地下水を湯呑するのに必要な量を透水することがで
きると共に、多量の雨水の場合における地下水の偏在に
よる危険を防止することができる。In addition, the water permeability in the direction perpendicular to the civil engineering sheet is slightly imparted without impairing the water permeability in the direction along the civil engineering sheet, so for example, only the amount of water necessary for plant growth can pass through, or underground water can be drained into a teacup. It is possible to allow water to permeate in the amount necessary for rainwater, and it is also possible to prevent dangers due to uneven distribution of groundwater in the case of large amounts of rainwater.
以上の説明から明らかなように、本発明によれば、優れ
た吸水性能を有する高透水性層と透水性を所望の程度に
抑制した低透水性層とを有するので、土中の排水方向を
適宜に調整することができる共に、開口部の大きさ、ピ
ッチの程度を選択してこの低透水性層の透水性能を適宜
にコントロールすることができ、シートと直交する方向
にも適度の水分が透過し、植物成育に必要な分のみ透水
したり、地下水を湯呑するのに必要な量を透水すること
ができるほか、地下水の偏在による危険を防止すること
ができるなどの実用上における優れた作用効果を奏する
ことができる。As is clear from the above description, the present invention has a highly water permeable layer with excellent water absorption performance and a low water permeability layer that suppresses water permeability to a desired level, so that the direction of drainage in the soil can be controlled. The water permeability of this low water permeability layer can be adjusted appropriately, and the water permeability of this low water permeability layer can be controlled appropriately by selecting the size of the openings and the degree of pitch. It has excellent practical effects, such as allowing only the amount of water necessary for plant growth to pass through, or the amount of groundwater necessary for making tea, and preventing dangers due to uneven distribution of groundwater. It can be effective.
図面は本発明に係る土木用シートの実施例を示すもので
、第１図はその平面図、第２図はその縦断面図、第３図
は使用例を示す説明図である。
１：土木用シート ２：高透水性層３：低透水性層
４：開口部
特許出願人 ユニチカ株式会社The drawings show an embodiment of the civil engineering sheet according to the present invention, and FIG. 1 is a plan view thereof, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is an explanatory view showing an example of use. 1: Civil engineering sheet 2: High water permeability layer 3: Low water permeability layer 4: Opening patent applicant Unitika Co., Ltd.
Claims (1)
点状に残しながらコーティングして高透水性層と低透水
性層とを形成したことを特徴とする土木用シート。A sheet for civil engineering, characterized in that a high water permeability layer and a low water permeability layer are formed by coating one side of a highly water permeable nonwoven fabric with a resin while leaving uncoated portions scattered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5162788A JPH01226911A (en) | 1988-03-07 | 1988-03-07 | Sheet for civil engineering work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5162788A JPH01226911A (en) | 1988-03-07 | 1988-03-07 | Sheet for civil engineering work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01226911A true JPH01226911A (en) | 1989-09-11 |
Family
ID=12892092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5162788A Pending JPH01226911A (en) | 1988-03-07 | 1988-03-07 | Sheet for civil engineering work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01226911A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0620523U (en) * | 1992-06-04 | 1994-03-18 | 株式会社テザック | Underdrain drainage |
-
1988
- 1988-03-07 JP JP5162788A patent/JPH01226911A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0620523U (en) * | 1992-06-04 | 1994-03-18 | 株式会社テザック | Underdrain drainage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3597928A (en) | Erosion control | |
| AT507306B1 (en) | BUILDING MATERIALS (EARTH COVERS) AND THEIR MIXTURE WITH GROUND MATERIALS | |
| US3479825A (en) | Irrigational systems | |
| EP1198167A1 (en) | Striplike body of vegetation for covering roofs with thin layers of vegetation | |
| AT408115B (en) | ROOT-RESISTANT ROOF COATING | |
| DE60223608T2 (en) | CAPILLARY MAT AND METHOD FOR PRODUCING A CAPILLARY MAT | |
| DE202016002910U1 (en) | Irrigation device for vegetation strata | |
| DE2253906A1 (en) | GARDEN AREA | |
| JPH01226911A (en) | Sheet for civil engineering work | |
| JP5108225B2 (en) | Greening container | |
| JP3103300B2 (en) | Water storage facility | |
| JP3485277B2 (en) | Basic materials for planting | |
| WO1993024315A1 (en) | Organic geotextile | |
| KR19980056832U (en) | Roof artificial ground | |
| JPH04357207A (en) | Bentonite waterproof work and waterproof mat | |
| JPH0449242Y2 (en) | ||
| TWM568868U (en) | Soil water retention system | |
| JP4143226B2 (en) | Crop cultivation floor structure | |
| JP2893050B2 (en) | Topsoil protection sheet | |
| JPH0951733A (en) | Water supply structure to planted face of slope | |
| JPS633811Y2 (en) | ||
| JP2538939Y2 (en) | Embankment structure such as ground | |
| NO854151L (en) | NURSING DEVICE FOR CULTIVATION OF PLANTS AND SEEDS. | |
| JPS6033141Y2 (en) | weed control sheet | |
| SU1169394A1 (en) | Method of draining enclosed depressions |