EP0125939A1 - Verfahren zum Herstellen von Dichtungswänden - Google Patents

Verfahren zum Herstellen von Dichtungswänden Download PDF

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Publication number
EP0125939A1
EP0125939A1 EP84400497A EP84400497A EP0125939A1 EP 0125939 A1 EP0125939 A1 EP 0125939A1 EP 84400497 A EP84400497 A EP 84400497A EP 84400497 A EP84400497 A EP 84400497A EP 0125939 A1 EP0125939 A1 EP 0125939A1
Authority
EP
European Patent Office
Prior art keywords
strips
trench
sealing
film
partition
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.)
Ceased
Application number
EP84400497A
Other languages
English (en)
French (fr)
Inventor
Léon Mastikian
Albert Pickaert
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.)
Intrafor-Cofor SA
Original Assignee
Intrafor-Cofor SA
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
Priority claimed from FR8304439A external-priority patent/FR2542778B1/fr
Priority claimed from FR8306998A external-priority patent/FR2545118B2/fr
Application filed by Intrafor-Cofor SA filed Critical Intrafor-Cofor SA
Publication of EP0125939A1 publication Critical patent/EP0125939A1/de
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/06—Restraining of underground water
    • E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material

Definitions

  • the present invention relates to a process for the construction of isolated sites in particular for the discharge of polluting products and further relates to the construction of dams to liquids, disposed in the ground.
  • the migration phenomena are in practice limited to the upper layers of terrain often more permeable than the substratum, the depth depending obviously of the structure and the constitution of the grounds considered.
  • this flexible partition usually being constituted by a mixture in adequate proportions of a setting product and containing in particular, fillers, water, bentonite and cement.
  • a sealing process for flexible partitions embedded in land is implemented, which is characterized in that, just after pouring in place in the trench which receives it, of the mixture constituting the flexible partition, and whatever its nature, at least one sealing film weighted for this purpose on its lower edge is brought down substantially to the bottom of the trench in said mixture and is carried out step by step by strips of width corresponding to that of the sheet used, allowing said strips to overlap over a width sufficient to ensure the impermeability between two neighboring strips.
  • the quality of the film must be chosen so that the film can withstand chemically and mechanically the products which will come into contact with it, either in particular the water of determined quality from the surrounding natural environment, or the effluents from . polluting products discharged on site.
  • the sealant does not have to be poured immediately after drilling the excavation; it is becoming more and more common to directly drill "continuously" - from the trench with a drilling fluid which will stiffen or set later when the liquid in question is left to stand.
  • the method mentioned above is also applicable to trenches into which a sealant is poured after drilling which stiffens or subsequently sets, for example concrete or grout.
  • a site 2 comprising a product 3 to be isolated is isolated locally or totally from the surrounding terrain 1.
  • the site 2 is isolated from the surrounding terrain 1 by means of a partition 4 completely or partially surrounding the site, for example substantially circular.
  • This partition 4 must descend to a depth H sufficient in the ground to prevent possible seepage of effluents from below the partition 4 for example as would be shown by arrow 5 in FIG. 1.
  • the height H can be determined in practice on the basis of knowledge of the terrain, this height being all the lower the more the terrain has enough relatively waterproof substantially horizontal layers or strata.
  • the permeability is very high and the isolation of the site 2 with respect to the ground 1 can only be ensured as far as the partition 4 is indeed effectively waterproof.
  • a trench 8 is dug in the ground 1 according to known methods of excavation to the height B determined by proceeding in sections of determined lengths, the width e of the trench being equal to the width of the partition that will be placed in place.
  • This excavation is normally done in the medium of drilling fluid, of the nature and density appropriate for prevent the collapse of the side partitions.
  • a "film” is placed along one of the two partitions of the trench, for example the “interior” partition 8i of the trench. "sealing marked 9 from a storage roller 10 and guide rollers 11 placed at the edge of the trench.
  • the film descends near the partition 8i of the trench in the still fluid medium of the partition 4 thanks to a ballast 12 suspended beforehand at the lower end of the film 9. There is thus, in the vicinity of the partition 8i, a strip of width L, taking care to ensure a sufficient overlap of value l with the strip of the slice previously cast in place.
  • the width of the space E must be such that, taking into account the overlap l that one wishes to have of the strip 9k, one has a length L + ⁇ L sufficient as indicated in the drawing to leave a certain space between the border at line marked 15 of strip 9l and the extreme excavation wall 16 of the new section of width L.
  • the sealing film 9l is put in place which covers the desired length 9k of the film 9k already in place in the section 4k, the setting of which has not yet been made.
  • a drilling guide will be placed, for example a sheet pile or any other device making it possible to guide the drilling over the entire height of the excavation behind the strip L in order to protect it.
  • the strip of the last section will come to rest on the drilling guide or on the strip up to the strip of the first section in order to seal the device.
  • the method of the invention allows the digging of the various successive sections of drilling in complete freedom without being hampered by the width of the previous slice already in place in the trench.
  • the width of overlap of the strips is sufficient to allow any leakage to be avoided in the event of a divergence in verticality when the strips are put in place.
  • the positioning of the strips may require in certain cases, in particular for large trench depths, the use of a heavy complementary ballast 40 lowered during the positioning of the film 9 by a rope 41 wound on a winch 42 and which is for example received by suspension hooks 43 secured to the ballast 12 fixed to the lower edge of the film 9 (FIGS. 1 and 3). After the film 9 has been put in place, the laying ballast 40 is raised.
  • the tightness to the right of the overlap of the strips can be improved by filling a tube with a diameter at least equal to the thickness of the trench (e) this tube being obtained by welding on the film over the entire height of the trench. or by a sealed connection of the folded end of the film on itself, and as will appear more clearly below.
  • This rod closed at its base will be subsequently filled before the stiffening of the product constituting the filling of the trench in order to press film on film two successive strips, an overpressure in this cylinder will suffice to obtain this effect.
  • the waterproof film a plastic film or any other liquid-tight product of adequate flexibility will be chosen.
  • the flange 20 is part of the film 19 with which it is secured along one of its edges (on the right in FIG. 5), being formed either by folding a loop of the film over itself along of this slice either by a hose welded or fixed on the film.
  • the tube has a flattened shape, not being inflated, as shown diagrammatically in dotted lines in 20'j, 20'k, the tube being inflated only after the two strips partially overlapping the right side of the corresponding flange.
  • the circular diameter of the tube is greater than the width D of the trench, so that after it has inflated, it effectively applies the two strips in partial overlap one against the other and against the adjacent wall 8i of the trench, even if the trench is slightly wider than D.
  • the tubes are for this purpose closed at their base before the corresponding strip descends. They are advantageously inflated by introduction into the tube of a curable fluid with a density close to that which constitutes the semi-flexible partition 4.
  • the tube overflows sufficiently in altitude with the liquid level so that when the tube is filled, one obtains overpressure over the entire height of the rod immersed in the liquid.
  • the purpose of this operation is to obtain a force for placing the sheets on the wall sufficient to obtain the movement of the sheets and the desired seal.
  • the strips are advantageously allowed to protrude above the trench of a length sufficient to allow them to be folded over the trench, which will protect the mixture constituting the semi-flexible partition from drying which may harm to its subsequent properties.
  • the elements of the sealing film 19, 20 serving to perfect the sealing of the partition are constituted by flat strips of film comprising on a from their slices an inflatable sausage. Many variations can be imagined to constitute equivalent elements.
  • FIG. 6 we have shown the combination of adjacent strips 21i, 21j, 21k, placed edge to edge without overlap and on which strips 22i, 22j, 22k are pressed which overlap them and which have at each of their ends of an inflatable tube 23,24.
  • a third intermediate flange 25 can be provided.
  • a sealing structure can be put in place inside the trench without more difficulty than the structure illustrated in the Figure 5 or Figure 1.
  • the covering structure of the films is improved; in other words, the preferential leakage path of infiltration between two overlapping strips is elongated with respect to the structure illustrated in FIGS. 2 and 5.
  • Such a structure can be further improved by also overlapping the strips 21 for example as shown in Figure 2.
  • FIG. 6 schematically a padding equipping the film 21 which will be compressed against the wall 8i of the terrains.
  • the object of such padding which can be made of any suitable material, is to avoid punctures and punctures of the sealing film by elements of the wall of the trench such as flint or other sharp hard bodies.
  • Such padding can be provided generally at least on the wall of the film which will bear against the wall of the trench. Indeed, one can also imagine that the sausage is also protected in the same way. However, this padding can most of the time be omitted, the film remaining protected in the relatively impenetrable and very protective mixture in the process of hardening.
  • each element advantageously comprises two or four sheets 28, 29, 30, 31 joined together for example by gluing or welding 32 forming the crossing axis of the X.
  • One of the sheets 28, has on its edge remote from the center of the X, an inflatable tube 33 closed at its base as shown in 34.
  • the sheets are ballasted at their base with weights as shown in 35, 36, 37, 38.
  • an auxiliary ballast as described in Figures 1 and 3 can be used if necessary.
  • the elements such as 27 illustrated in FIGS. 7 and 8 can be formed from the union of several nested X's.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Revetment (AREA)
  • Processing Of Solid Wastes (AREA)
EP84400497A 1983-03-18 1984-03-12 Verfahren zum Herstellen von Dichtungswänden Ceased EP0125939A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8304439A FR2542778B1 (fr) 1983-03-18 1983-03-18 Procede de construction de sites isoles en particulier pour la decharge de produits polluants et sites isoles ainsi construits
FR8304439 1983-03-18
FR8306998 1983-04-28
FR8306998A FR2545118B2 (fr) 1983-04-28 1983-04-28 Procede de construction de sites isoles en particulier pour la decharge de produits polluants et la formation de barrages et sites isoles ainsi construits

Publications (1)

Publication Number Publication Date
EP0125939A1 true EP0125939A1 (de) 1984-11-21

Family

ID=26223341

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400497A Ceased EP0125939A1 (de) 1983-03-18 1984-03-12 Verfahren zum Herstellen von Dichtungswänden

Country Status (3)

Country Link
EP (1) EP0125939A1 (de)
AR (1) AR230659A1 (de)
GB (1) GB2136861A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913760A1 (de) * 1989-04-26 1990-10-31 Niederberg Chemie Schlitzwand

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3424821A1 (de) * 1984-07-06 1986-01-16 Niederberg-Chemie GmbH, 4133 Neukirchen-Vluyn Erdschlitze
DE3444690A1 (de) * 1984-12-07 1986-06-12 Ed. Züblin AG, 7000 Stuttgart Verfahren und vorrichtung zum einbringen von paneelen in schlitzwaende
DE3444681A1 (de) * 1984-12-07 1986-06-19 Ed. Züblin AG, 7000 Stuttgart Verfahren zur herstellung von schlitzwaenden mit eingebauten duennwandigen dichtelementen
DE3610949A1 (de) * 1986-04-02 1987-10-15 Dyckerhoff & Widmann Ag Verfahren zur herstellung einer schmalwand in erdboeden, sowie dazu dienende einrichtungen und elemente
DE3826869C2 (de) * 1988-08-08 1995-09-07 Bauer Spezialtiefbau Verfahren zum Herstellen einer Dichtungsmembran in einem Erdschlitz und Vorrichtung zur Durchführung des Verfahrens
DE3831078A1 (de) * 1988-09-13 1990-03-22 Strabag Bau Ag Verfahren zum einbringen duennwandiger metallbleche in eine als dichtwand dienende schlitzwand und falzverbindung hierzu
DE9016366U1 (de) * 1990-12-01 1991-02-21 Kiene, Gudrun, 7030 Böblingen Fingerzahnbürste
DE4343851C1 (de) * 1993-12-22 1995-06-29 Bauer Spezialtiefbau Ortbetonschlitzwand mit Abdichtungsmembran
DE59402603D1 (de) * 1994-02-08 1997-06-05 Rudolf Georg Hofinger Verfahren zur Abdichtung von Schlitzwänden
CN107761698A (zh) * 2017-10-24 2018-03-06 北京高能时代环境技术股份有限公司 土工膜布设装置及布设方法
CN109356102B (zh) * 2018-11-23 2024-01-30 中国电建集团成都勘测设计研究院有限公司 沥青混凝土心墙与坝基防渗墙连接结构
NL2024722B1 (nl) * 2020-01-21 2021-09-09 Koninklijke Oosterhof Holman Beheer B V Installatie van een geomembraan scherm in de bodem
CN115652974B (zh) * 2022-12-15 2023-03-31 北京高能时代环境技术股份有限公司 一种山谷型填埋场的污染管控系统及施工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2038719A5 (de) * 1969-03-27 1971-01-08 Sif Entreprise Bachy
DE2138123A1 (de) * 1970-08-04 1973-02-08 Welzow Braunkohle Schachtbau Dichtungswand, vorzugsweise fuer abriegelungen im untergrund
DE2546946A1 (de) * 1975-10-20 1977-04-28 Eurosond Gmbh Spezialunternehm Verfahren zum herstellen einer dichtungsschlitzwand im untergrund
FR2492864A1 (fr) * 1980-10-27 1982-04-30 Portier Jean Louis Produit semi-fini du type rouleau de film en matiere plastique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2094290A5 (de) * 1970-06-16 1972-02-04 Soletanche
GB1378153A (en) * 1971-06-09 1974-12-18 British Railways Board Methods of controlling the flow of gases underground

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2038719A5 (de) * 1969-03-27 1971-01-08 Sif Entreprise Bachy
DE2138123A1 (de) * 1970-08-04 1973-02-08 Welzow Braunkohle Schachtbau Dichtungswand, vorzugsweise fuer abriegelungen im untergrund
DE2546946A1 (de) * 1975-10-20 1977-04-28 Eurosond Gmbh Spezialunternehm Verfahren zum herstellen einer dichtungsschlitzwand im untergrund
FR2492864A1 (fr) * 1980-10-27 1982-04-30 Portier Jean Louis Produit semi-fini du type rouleau de film en matiere plastique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913760A1 (de) * 1989-04-26 1990-10-31 Niederberg Chemie Schlitzwand

Also Published As

Publication number Publication date
AR230659A1 (es) 1984-05-31
GB2136861A (en) 1984-09-26
GB8405428D0 (en) 1984-04-04

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19850415

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Inventor name: MASTIKIAN, LEON

Inventor name: PICKAERT, ALBERT