EP0933477B1 - Méthode de drainage et drains en forme de bande pour sa mise en oeuvre - Google Patents

Méthode de drainage et drains en forme de bande pour sa mise en oeuvre Download PDF

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Publication number
EP0933477B1
EP0933477B1 EP98101547A EP98101547A EP0933477B1 EP 0933477 B1 EP0933477 B1 EP 0933477B1 EP 98101547 A EP98101547 A EP 98101547A EP 98101547 A EP98101547 A EP 98101547A EP 0933477 B1 EP0933477 B1 EP 0933477B1
Authority
EP
European Patent Office
Prior art keywords
strap
drain
water
draining
drain material
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 - Lifetime
Application number
EP98101547A
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German (de)
English (en)
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EP0933477A1 (fr
Inventor
Ming-Chun Hu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tu Yung An
Original Assignee
Tu Yung-An
Tu Yung An
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tu Yung-An, Tu Yung An filed Critical Tu Yung-An
Priority to EP98101547A priority Critical patent/EP0933477B1/fr
Priority to DE69823000T priority patent/DE69823000T2/de
Priority to CA002229758A priority patent/CA2229758C/fr
Publication of EP0933477A1 publication Critical patent/EP0933477A1/fr
Application granted granted Critical
Publication of EP0933477B1 publication Critical patent/EP0933477B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E02D31/02—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 against ground humidity or ground water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B11/00—Drainage of soil, e.g. for agricultural purposes

Definitions

  • the present invention relates to a novel drainage method and the strap draining materials therefor and, in particular, to a draining method adapted for use in drainage system in the soil conservation on mountain slopes, agricultural industry and in civil engineering work and to flexible thin sheet like draining straps having a high resistance to pressure and a high efficiency of drain absorption.
  • a drain pipe is all that the circumference of at least of more than a half of the upper half portion of the circular tubular pipe is opened up with numerous tiny cracks densely distributed like meshes of a net for collecting infiltration water from the soil cover into the non-porous water collecting part of the lower half portion in the pipe and from there again water to flow out along the longitudinal direction of the pipe.
  • Others also include disclosure of forming a screw ditch on the outer circumference of a hard plastic drain pipe and in which the meshes are provided inside the ditch whereby it enhances the strength of the pipe body and improves the absorption efficiency.
  • This type of drain strap is formed by coating on the surface of a hard plastics formed concavo-convex support body with a layer of felt non-woven fabric.
  • the support body also has the two sides formed in ditches, however, the opening of the ditches is broader than the ditch bottom.
  • US-A-4 246 305 discloses a strap drain material having the features in the preamble of appended claim 1.
  • US-A-5,511,346 and US-A-5,056281 disclose panels for insulating and draining walls of foundations.
  • a strap drain material made by forming of a weather resistant, thermoplastic synthetic resin into a thin strap material, which comprises at least one side provided with small spaced apart drain collecting apertures, wherein said apertures consist of slots arranged spaced apart along the direction of breadth of the strap and extending whole length along the direction of length of the strap; each slot being provided with a notch, which leads to the outside air and forms a narrow gap smaller in aperture than the slot; the notches being so sized as to create a capillary action to absorb drain water.
  • a drainage method comprising the step of embedding in the soil a strap drain material according to any one of the preceding claims; the method being characterised by orienting the strap drain material so as to the slots be inclined in the direction of the length of the strap drain material in order to determine a siphonic force on the drain water.
  • FIG. 1 is a perspective view of one embodiment of the draining material of the present invention, with a section cut off along the direction of its length, in which the numeral 1 represents the elongated strap draining material with a flat shape in section.
  • This draining material 1 is a flexible strap body made by forming of a weather-resistant thermoplastic synthetic resin, one side of which is provided with a plurality of tiny drain collecting slots 2 densely arranged spaced-apart along the direction of breadth and parallel extending whole length along the longitudinal direction. Notches 21 of the slots 2 are formed in narrow cracks sufficient to create a capillary action and are communicated inwardly with small round hole slots 22 with an expanded section.
  • the other side of the strap body is formed in a flat and smooth surface 3.
  • the entire strap body is formed in a strap of reel band having the two sides both actually of a plain surface capable of being rolled up like a bolt of cloth and cut in appropriate length for use according to need.
  • the notches 21 are formed in inlet portions to absorb water by capillary phenomenon while the slots 22 are formed in channels for collecting and draining water, the action and principle of which will be described hereinbelow.
  • FIG. 2 is a second embodiment of the draining material of the present invention, in which a draining material 1A is basically same as the first embodiment of a flat elongated strap body made by forming of a thermoplastic synthetic resin. However, both the upper and lower sides of the strap body are formed with drain collecting slots 2 of same construction as the first embodiment. In the present embodiment, the drain collecting slots 2 on the two sides of the draining strap 1A are maintained on the same pitch and opposite to each other vertically. However, it is also possible if a vertically staggered arrangement is followed.
  • FIG. 3 is a third embodiment of the draining material of the present invention, where in order to enable the soft flexible draining material to have a high strength of resistance to soil pressure, there is attached to the flat and smooth surface 3 of the draining material 1 shown in FIG. 1 a reinforcement material 4 formed of a hard plastic material.
  • the form material 4 uses simply a U-shaped material, however, it is also possible to use, for example, a U-shaped material 4A containing inside the slot numerous ribs, or a formed pipe material 4B or any other suitable form material 4C, as shown in FIGS. 4(A), (B) and (C).
  • FIG. 5 is a further embodiment of the draining material of the present invention, whereas in the third embodiment one side of the draining material 1 is attached with a hard plastics made reinforcement form material 4 in the present embodiment, however, the reinforcement portion is formed directly integrally with the draining material 1.
  • the reinforcement portion shown in the drawings includes several high and low ribs 41, 42 extending along the longitudinal length, it is apparent however that various modifications can be made.
  • a strip of the draining strap 1 of the first embodiment having length 35cm x breadth 5cm x thickness 0.3cm with a pitch of holes 1.2mm on one side thereof and a total of 40 lanes of drain collecting slots 2 with notches 21 of a breadth 0.15mm and slots 22 of a diameter 0.9mm was obtained.
  • the draining strap 1 after the inner end was sealed was embedded on the bottom inside an acryl transparent plastics made container 5 of breadth 30cm x length 30cm x height 20cm such that the outer end of the draining strap was exposed to the outside for about 6cm as shown in FIG. 6.
  • Example 1 The draining strap 1 of Example 1 was embedded with the reverse side thereof, that is, the side having slots 2, facing downwardly in the similar position of the container 5, and the other conditions were same as in Example 1.
  • the container was filled with water 4500 cc and then after approximately 2 minutes and 5 seconds had passed, water flowed out from the outlet end of the draining strap. Same as in Example 1, the flow was still in the form of continuous or intermittent water column flowing out from about 2/3 of the slots 2 on the straps.
  • Two strips 1a, 1b and a section of conventional drain pipe 1c were prepared from the draining strap 1 of Example 1. 2/3 circumferential surface of the drain pipe was provided with numerous small holes and the area of water infiltration was 70 cm 2 /m. Both strips of the draining strap and the drain pipe were embedded by the same inclination (1/30) in the aforesaid container 5, as shown in FIG. 7, with the draining strap 1a facing downwardly, the draining strap 1b facing upwardly and the drain pipe 1c with the non-porous part lying below. About 2 minutes after addition of water to the full, water flowed out respectively from the draining straps 1a, 1b and the drain pipe 1c.
  • the outflow of water in the drain pipe 1c decreases gradually to 3 1/2 minutes the flow of water stops. While the same outflow of water is still maintained in the draining straps 1a, 1b, however, after 3 1/2 minutes the amount of outflow of water also decreases gradually form the draining strap 1b till 4 1/2 minutes the outflow of water stops. Outflow of water continues in the draining strap 1a till after about 30 minutes when it stops. At this time, the sandy soil was substantially saturated with water content and the water level was no longer there on the upper part of the soil.
  • the draining strap of the present invention possesses a strong rate of water absorption and a drainage effect. Accordingly, when water head pressure drops gradually there is a tendency that
  • draining straps 1a, 1b of the present invention are better in the water absorption effect than the conventional drain pipes, and then of the same draining straps 1a, 1b those facing downwardly contrarily are better in the rate of water absorption then those which face upwardly.
  • FIGS. 8(A) and 8(B) show partially enlarged drawings of FIGS. 8(A) and 8(B).
  • FIG. 8(A) because the notches 21 of the drain collecting slots 2 face upwardly, inevitably the sandy loam P1 of larger particle size gradually collects on the upper part of the notches 21 causing a partial blockade in the notches.
  • the notches extend longitudinally, unlike the general drain pipes which have individual meshes of a considerable pitch and can be easily blocked, here there are still intercommunicating notches of a considerable length or number that can absorb infiltration water by the capillary action and at the same time encourage drainage by the siphonic action created inside the slots.
  • the result is a much better drain absorption effect than is in a drain pipe that relies merely on the water head and the gravity of water for water flowing in and drainage.
  • the sandy loam P2 that enter the slots 22 from the narrow notches 21 will not block either because there the space increases abruptly and also because of the siphonic action created in the notches the sandy loam easily flows out with water.
  • FIG. 8(B) shows the notches 21 facing downwardly and in the condition, water flows in by the water-head pressure and the capillary effect. Since the draining strap 1 is closed on the above and also the notches 21 face downwardly, both large and small size sandy loam particles P1, P2 settle down because of the gravity and will not collect and enter the notches and block in. Only the dissolved matter enters the slots 22 and this matter dissolves in and flows out with water. Next, because the notches are very narrow, it is sufficient to support water pressure inside the slots by means of the surface tension in the stationary state and there is no back leakage.
  • the drain materials of the present invention not only use the capillary action plus siphonic action in achieving a high effectiveness of water absorption and drainage, but because also the straps are formed in a flexible flat band-like structure to facilitate transportation and construction and resistance to pressure, permit gravity rolling at the condition of only a thin soil cover or without a soil cover thus making it possible a saving in the cost of construction. Also, in the above condition where the soil is saturated with water content, this soil will become liquefied and form mire if subject to gravitational pressure or rolling pressure (such as: by vehicles, etc.). However, using the present drain materials it is still possible to continue draining and to allow the soil to become hardened at once. The materials are therefore advantageous to construction.
  • the drain materials are formed of an totally impermeable plastics, they can be used as a waterproof membrane as well as a draining strap to achieve the dual purposes of preventing water from infiltrating into the inner sides of the walls of the construction while simultaneously draining away water from the soil, if the materials are attached by the flat and smooth side thereof to the side of the walls of the basement or tunnel construction which are in contact with the soil by an adhesive.
  • the materials are thus a novel and extensively useful drain material for use in the drainage system of the agricultural and industrial constructions.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Mechanical Engineering (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Road Paving Structures (AREA)

Claims (10)

  1. Un matériau en bande pour drainage, fabriqué par mise en forme d'une résine synthétique thermoplastique résistante aux intempéies en une bande mince dont au moins un côté présente de petites ouvertures de collecte de l'eau drainée (2), le matériau en bande pour drainage (1, 1A) étant caractérisé en ce que lesdites ouvertures consistent en fentes réparties à distance les unes des autres le long de la direction de la largeur de la bande et s'étendant sur toute la longueur dans la direction de la longueur de la bande, chaque fente (2) présentant une encoche (21) conduisant à l'air extérieur et formant un espace étroit d'ouverture plus petite que la fente (2), les encoches (21) étant dimensionnées de façon à créer une action capillaire pour absorber l'eau drainée.
  2. Un matériau en bande pour drainage selon la revendication 1, caractérisé en ce qu'il présente un autre côté (3) exempt de fentes de collecte (2) de l'eau drainée.
  3. Un matériau en bande pour drainage selon la revendication 2, caractérisé en ce que ledit autre côté (3) présente des nervures de renfo cement (42).
  4. Un matériau en bande pour drainage selon la revendication 2, caractérisé en ce que ledit autre côté (3) du matériau en bande comporte un matériau de renforcement en forme de U (4A, 41) obtenu par mise en forme d'une matière plastique dure.
  5. Un matériau en bande pour drainage selon la revendication 2, caractérisé en ce que ledit autre côté (3) comporte des matériaux tubulaires rectangulaires (43, 4C) obtenus par mise en forme d'une matière plastique dure, en tant qu'éléments de renforcement.
  6. Un matériau en bande pour drainage selon la revendication 1, caractérisé en ce qu'il est souple.
  7. Un matériau en bande pour drainage selon la revendication 1, caractérisé en ce qu'il présente une épaisseur inférieure à 5 mm.
  8. Une méthode de drainage, comprenant l'étape consistart à enfouir dans le sol un matériau en bande pour drainage selon l'une quelconque des revendications précédentes, méthode caractérisée en ce que le matériau en bande pour drainage est orienté de manière telle que es fentes (2) sont inclinées dans la direction de la longueur du matériau en bande pour drainage (1, 1A) en vue de créer un effet de siphon sur l'eau drainée.
  9. Une méthode de drainage selon la revendication 11, caractérisé en ce que le matériau en bande pour drainage (1, 1A) est disposé dans le sol de façon que les encoches (21) soient situées face vers le bas.
  10. Une méthode de drainage selon la revendication 11, caractérisée en ce que l'on dispose le matériau en bande pour drainage (1) dans le sol et qu'il est étroitement réuni à une paroi avec les fentes faisant face au sol.
EP98101547A 1998-01-29 1998-01-29 Méthode de drainage et drains en forme de bande pour sa mise en oeuvre Expired - Lifetime EP0933477B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP98101547A EP0933477B1 (fr) 1998-01-29 1998-01-29 Méthode de drainage et drains en forme de bande pour sa mise en oeuvre
DE69823000T DE69823000T2 (de) 1998-01-29 1998-01-29 Dränageverfahren und Dränagestreifen zur Durchführung des Verfahrens
CA002229758A CA2229758C (fr) 1998-01-29 1998-02-17 Methode de drainage et materiaux de bandes de drainage connexes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98101547A EP0933477B1 (fr) 1998-01-29 1998-01-29 Méthode de drainage et drains en forme de bande pour sa mise en oeuvre
CA002229758A CA2229758C (fr) 1998-01-29 1998-02-17 Methode de drainage et materiaux de bandes de drainage connexes

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EP0933477A1 EP0933477A1 (fr) 1999-08-04
EP0933477B1 true EP0933477B1 (fr) 2004-04-07

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CA (1) CA2229758C (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109613208A (zh) * 2018-11-26 2019-04-12 贵州师范大学 一种坡耕地边沟水土保持效益的模拟试验方法
CN109613209A (zh) * 2018-11-26 2019-04-12 贵州师范大学 一种坡耕地边沟水土保持效益的大田模拟试验方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110485375A (zh) * 2019-07-25 2019-11-22 黄河勘测规划设计研究院有限公司 适于平原水库库盆的防渗排水排气结构
CN112227504A (zh) * 2020-10-12 2021-01-15 湖南凡工建筑工程有限公司 一种沥青高速公路毛细透排水带连接装置
CN118127878A (zh) * 2024-03-26 2024-06-04 中国十七冶集团有限公司 一种透水混凝土自动打夯装置及施工方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246305A (en) * 1978-03-22 1981-01-20 Solentanche-Entreprise Drainage structure and process
FR2473262A1 (fr) * 1980-01-14 1981-07-17 Renard Patrick Dispositif souterrain d'irrigation ou de drainage
CA1314681C (fr) * 1989-06-22 1993-03-23 Grant Mccarthy Panneau d'isolation et de drainage pour murs de soubassement
US5511346A (en) * 1994-08-24 1996-04-30 The Dow Chemical Company Thermoplastic foam insulation and drainage board and method of using in below-grade applications

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109613208A (zh) * 2018-11-26 2019-04-12 贵州师范大学 一种坡耕地边沟水土保持效益的模拟试验方法
CN109613209A (zh) * 2018-11-26 2019-04-12 贵州师范大学 一种坡耕地边沟水土保持效益的大田模拟试验方法

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Publication number Publication date
CA2229758A1 (fr) 1999-08-17
EP0933477A1 (fr) 1999-08-04
CA2229758C (fr) 2005-06-28

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