EP0193605B1 - Foil material for controllable leakproof separation of the areas located on both of its sides - Google Patents

Foil material for controllable leakproof separation of the areas located on both of its sides Download PDF

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Publication number
EP0193605B1
EP0193605B1 EP85905061A EP85905061A EP0193605B1 EP 0193605 B1 EP0193605 B1 EP 0193605B1 EP 85905061 A EP85905061 A EP 85905061A EP 85905061 A EP85905061 A EP 85905061A EP 0193605 B1 EP0193605 B1 EP 0193605B1
Authority
EP
European Patent Office
Prior art keywords
sheet material
spacing element
material according
controllable
sides
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
Application number
EP85905061A
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German (de)
French (fr)
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EP0193605B2 (en
EP0193605A1 (en
Inventor
Heiner I. Hammer
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.)
Schlegel Lining Technology GmbH
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Schlegel Lining Technology GmbH
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Publication date
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Application filed by Schlegel Lining Technology GmbH filed Critical Schlegel Lining Technology GmbH
Priority to AT85905061T priority Critical patent/ATE38868T1/en
Publication of EP0193605A1 publication Critical patent/EP0193605A1/en
Application granted granted Critical
Publication of EP0193605B1 publication Critical patent/EP0193605B1/en
Publication of EP0193605B2 publication Critical patent/EP0193605B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/004—Sealing liners
    • 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 invention relates to a flexible film material for controllably tight separation of the areas located on its two sides, for example to form a septic barrier in the ground to protect the groundwater from pollutants present in certain areas.
  • the invention has for its object to provide a film material of the type mentioned, which forms a double wall treatable as a unit.
  • the solution according to the invention consists in the fact that the film material in the space between two closed films has a surface-connected spacer with flow cross sections open in the direction parallel to the film extension.
  • This spacer is preferably formed from a sheet material with projections rising transversely to its extension. Conversely, it can also have depressions recessed transversely to its extent.
  • the side flanks of the projections or depressions must be so steep in relation to the main direction of extent of the surface material that the foils cannot lie against the surface of the surface material located between them, or that the flow cross-sections formed by the projections or depressions can be closed.
  • the design of the spacer as a grid with at least two sets of essentially rectified strands has proven to be particularly expedient, the crossing or connecting points of which have a greater thickness than the individual strands, so that the aforementioned projections are formed at the crossing or connecting points, while there are recesses between them.
  • a typical example of such a spacer is a woven or knitted fabric or a one-piece grid with thickened connection points, as is preferably obtained by stretching a perforated plastic film in both surface directions, the webs lying between two holes being stretched and the one between three or four next adjacent holes, the central area as a connection point is less stretched and therefore remains thicker.
  • an open-pore surface material such as felt, an open-pore plastic film material or a porous granulate sintered product can also be used as a spacer.
  • the film material consists of two cover films 1 and the spacer 2, which according to FIG. 2 is formed from a grid of thin webs 3 and connecting points or crossing points 4 connecting them, which are thicker than the webs 3.
  • This spacer arises from the fact that a film of constant thickness, as shown in Figure 3 and which is provided with regular rows of holes 5, is stretched in the two directions indicated by arrows in the warm plastic state.
  • the cover films 1 consist, for example, of polyethylene with a thickness of preferably 1-5 mm.
  • the maximum thickness of the spacer 2, which advantageously also consists of polyethylene, can be of the same order of magnitude.
  • the cover films 1 are expediently connected to one another on all sides by a circumferential edge seam, so that the space between them is tightly enclosed.
  • This space can be tapped anywhere to check the medium in it.
  • the pollutants to be monitored are evaporable, it may be sufficient to attach a vacuum connection to the upper edge of the film material sunk into the earth, via which samples of the atmosphere in the intermediate space can be taken and checked continuously or periodically. If samples have to be drawn off in the liquid state, a removal hose can be led from a removal point provided at the upper edge into the lower area of the material interspace, so that samples can be sucked up from the liquid collecting there.

Abstract

A flexible foil material for controllable leakproof separation of the areas located on both of its sides, for example a drainage separating wall. In the intermediate area between two closed foils a two-dimensionally connected distance-piece is envisaged which forms an open flow cross-section parallel to the length of the foil, so that harmful matter which enters at any point in the intermediate area is diverted to another point and thus can be recognized.

Description

Die Erfindung bezieht sich auf ein flexibles Folienmaterial zum kontrollierbar dichten Trennen der auf seinen beiden Seiten befindlichen Bereiche, beispielsweise zur Bildung einer Sickersperrwand im Boden zum Schutz des Grundwassers vor bereichsweise anwesenden Schadstoffen.The invention relates to a flexible film material for controllably tight separation of the areas located on its two sides, for example to form a septic barrier in the ground to protect the groundwater from pollutants present in certain areas.

Es ist bekannt, eine solche Sperrwand doppelwandig auszubilden und im Zwischenraum eine Sandschüttung mit Proberohren vorzusehen, durch die das Vorhandensein etwaiger Schadstoffe festgestellt werden kann, nachdem sie durch ein Leck in einen Wandteil hindurch gelangt sind und bevor sie auch den anderen Wandteil in den zu schützenden Grundwasserbereich durchdringen können (Prospekt "ENVIROWALL" der Schlegel Lining Technology Inc.). Jedoch ist die Behandlung einer solchen bekannten Doppelfolie schwierig, weil zwei Folien in den im Erdreich vorgesehenen Schlitzgraben und zwischen diesen auch noch die Sandschüttung eingebracht werden müssen.It is known to design such a barrier wall with double walls and to provide a sand fill with test tubes in the intermediate space, by means of which the presence of any pollutants can be determined after they have passed through a leak in one wall part and before they also pass the other wall part into those to be protected Can penetrate the groundwater area (brochure "ENVIROWALL" from Schlegel Lining Technology Inc.). However, the treatment of such a known double film is difficult because two films have to be introduced into the slot trench provided in the ground and between them the bed of sand.

Der Erfindung liegt die Aufgabe zugrunde, ein Folienmaterial der eingangs genannten Art zu schaffen, das eine als Einheit behandelbare Doppelwand bildet.The invention has for its object to provide a film material of the type mentioned, which forms a double wall treatable as a unit.

Die erfindungsgemäße Lösung besteht darin, daß das Folienmaterial im Zwischenraum zwischen zwei geschlossenen Folien einen flächig zusammenhängenden Abstandshalter mit in Richtung parallel zur Folienerstreckung offenen Fließquerschnitten aufweist. Vorzugsweise wird dieser Abstandshalter von einem Flächenmaterial mit quer zu seiner Erstreckung sich erhebenden Vorsprüngen gebildet. Umgekehrt kann er auch quer zu seiner Erstreckung eingesenkte Vertiefungen aufweisen. Die Seitenflanken der Vorsprünge beziehungsweise Vertiefungen müssen so steil im Verhältnis zur Haupterstreckungsrichtung des Flächenmaterial sein, daß die Folien sich nicht so vollständig an die Oberfläche des dazwischen befindlichen Flächenmaterials anlegen können bzw. daß die von den Vorsprüngen beziehungsweise Vertiefungen gebildeten Fließquerschnitte geschlossen werden können.The solution according to the invention consists in the fact that the film material in the space between two closed films has a surface-connected spacer with flow cross sections open in the direction parallel to the film extension. This spacer is preferably formed from a sheet material with projections rising transversely to its extension. Conversely, it can also have depressions recessed transversely to its extent. The side flanks of the projections or depressions must be so steep in relation to the main direction of extent of the surface material that the foils cannot lie against the surface of the surface material located between them, or that the flow cross-sections formed by the projections or depressions can be closed.

Besonders zweckmäßig hat sich die Ausführung des Abstandshalters als Gitter mit wenigstens zwei Scharen von im wesentlichen gleichgerichteten Strängen erwiesen, deren Kreuzungs-oder Verbindungspunkte eine größere Dicke als die einzelnen Stränge aufweisen, so daß an den Kreuzungs- beziehungsweise Verbindungspunkten die erwähnten Vorsprünge gebildet werden, während dazwischen eingesenkte Vertiefungen vorhanden sind. Ein typisches Beispiel für einen solchen Abstandshalter ist ein Gewebe oder Gewirk oder ein einstückig ausgeführtes Gitter mit verdickten Verbindungspunkten, wie es vorzugsweise dadurch erhalten wird, daß eine gelochte Kunststoffolie in beiden Flächenrichtungen gestreckt wird, wobei die zwischen jeweils zwei Löchern liegenden Stege gestreckt und der zwischen drei oder vier nächstbenachbarten Löchern liegende, mittlere Flächenbereich als Verbindungspunkt weniger stark gestreckt und daher dicker bleibt.The design of the spacer as a grid with at least two sets of essentially rectified strands has proven to be particularly expedient, the crossing or connecting points of which have a greater thickness than the individual strands, so that the aforementioned projections are formed at the crossing or connecting points, while there are recesses between them. A typical example of such a spacer is a woven or knitted fabric or a one-piece grid with thickened connection points, as is preferably obtained by stretching a perforated plastic film in both surface directions, the webs lying between two holes being stretched and the one between three or four next adjacent holes, the central area as a connection point is less stretched and therefore remains thicker.

Schließlich kommt als Abstandshalter auch ein offenporiges Flächenmaterial in Frage wie beispielsweise Filz, ein offenporiges Kunststoffolienmaterial oder ein poröses Granulat Sinterprodukt.Finally, an open-pore surface material such as felt, an open-pore plastic film material or a porous granulate sintered product can also be used as a spacer.

Die Erfindung wird im Folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel veranschaulicht. Darin zeigen:

  • Figur 1 einen Schnitt durch das erfindungsgemäße Folienmaterial
  • Figur 2 eine Ansicht des Abstandshalters
  • Figur 3 eine Ansicht des Folienmaterials, aus dem der Abstandshalter gemäß Figur 2 durch Verstreckung erzeugt wurde.
The invention is explained in more detail below with reference to the drawing, which illustrates an advantageous embodiment. In it show:
  • 1 shows a section through the film material according to the invention
  • Figure 2 is a view of the spacer
  • 3 shows a view of the film material from which the spacer according to FIG. 2 was produced by stretching.

Das Folienmaterial besteht aus zwei Deckfolien 1 und dem Abstandshalter 2, der gemäß Figur 2 aus einem Gitter von dünnen Stegen 3 und diese verbindenden Verbindungspunkten oder Kreuzungspunkten 4 gebildet ist, die dicker als die Stege 3 sind. Dieser Abstandshalter kommt dadurch zustände, daß eine Folie von konstanter Dicke, wie sie in Figur 3 gezeigt ist und die mit regelmäßigen Reihen von Löchern 5 versehen ist, in den beiden durch Pfeile angedeuteten Richtungen im warmplastischen Zustand gedehnt wird. Wie sich ohne weiters aus einer Betrachtung der Größe der durch die Streckspannungen beanspruchten Querschnitte ergibt, sind die Spannungen im Bereich der dem engsten Querschnitt bildenden Stege 3' größer als im Bereich 4', so daß die Streckung sich hauptsächlich auf die Stege bezieht, während die jeweils zwischen vier Löchern 5 befindlichen Flächenbereiche 4' nicht oder nur weniger verformt werden und daher dicker bleiben, wie man es in Figur 1 erkennt.The film material consists of two cover films 1 and the spacer 2, which according to FIG. 2 is formed from a grid of thin webs 3 and connecting points or crossing points 4 connecting them, which are thicker than the webs 3. This spacer arises from the fact that a film of constant thickness, as shown in Figure 3 and which is provided with regular rows of holes 5, is stretched in the two directions indicated by arrows in the warm plastic state. As can easily be seen from a consideration of the size of the cross sections claimed by the yield stresses, the stresses in the area of the narrowest cross-section webs 3 'are greater than in the area 4', so that the stretch mainly refers to the webs while the surface areas 4 'located between four holes 5 are not deformed or are only deformed to a lesser extent and therefore remain thicker, as can be seen in FIG. 1.

Es ist möglich, die Deckfolien 1 mit dem Abstandshalter 2 fest zu verbinden, beispielsweise durch Schweißung an den verdickten Knotenpunkten 4. Notwendig ist dies in den meisten Fällen jedoch nicht, weil schon die fläche Aufeinanderlage der drei Bauteile eine bequeme gemeinsame Handhabbarkeit ergibt.It is possible to firmly connect the cover foils 1 to the spacer 2, for example by welding at the thickened nodes 4. In most cases, however, this is not necessary, because the flat superimposition of the three components already results in easy joint handling.

Die Deckfolien 1 bestehen beispielsweise aus Polyethylen in einer Dicke von vorzugsweise 1 - 5 mm. In derselben Größenordnung kann die maximale Dicke des Abstandshalters 2 liegen, der zweckmäßigerweise ebenfalls aus Polyethylen besteht.The cover films 1 consist, for example, of polyethylene with a thickness of preferably 1-5 mm. The maximum thickness of the spacer 2, which advantageously also consists of polyethylene, can be of the same order of magnitude.

Die Deckfolien 1 sind zweckmäßigerweise durch eine umlaufende Randnaht allseitig miteinander verbunden, so daß der Raum zwischen ihnen dicht eingeschlossen ist. An beliebiger Stelle kann dieser Raum zur Prüfung des darin befindlichen Mediums angezapft werden. Wenn beispielsweise die zu überwachenden Schadstoffe verdampfbar sind, kann es genügen, an den oberen Rand des in die Erde eingesenkten Folienmaterials einen Vakuumanschluß anzubringen, über den ständig oder periodisch Proben der im Zwischenraum befindlichen Atmosphäre entnommen und überprüft werden können. Wenn Proben in flüssigem Zustand abgezogen werden müssen, kann von einer am oberen Rand vorgesehenen Entnahmestelle ein Entnahmeschlauch bis in den unteren Bereich des Materialzwischenraums geführt werden, damit von der dort sich ansammelnden Flüssigkeit Proben abgesaugt werden können.The cover films 1 are expediently connected to one another on all sides by a circumferential edge seam, so that the space between them is tightly enclosed. This space can be tapped anywhere to check the medium in it. For example, if the pollutants to be monitored are evaporable, it may be sufficient to attach a vacuum connection to the upper edge of the film material sunk into the earth, via which samples of the atmosphere in the intermediate space can be taken and checked continuously or periodically. If samples have to be drawn off in the liquid state, a removal hose can be led from a removal point provided at the upper edge into the lower area of the material interspace, so that samples can be sucked up from the liquid collecting there.

Schließlich ist es auch möglich, den Materialzwischenraum mit Stoffen zu füllen, die etwa eindringende Schadstoffe absorbieren oder zerstören und dadurch in solcher Weise unschädlich machen, daß sie aus dem Material nicht in Richtung auf die zu schützende Bodenzone auswandern können.Finally, it is also possible to fill the intermediate space with substances which absorb or destroy any penetrating pollutants and thereby render them harmless in such a way that they cannot migrate from the material in the direction of the soil zone to be protected.

Claims (7)

1. A flexible sheet material for separating in a controllably leakproof manner the areas situated on either side thereof, characterised in that in a gap between two closed sheets (1) there is a laminar coherent spacing element (2) with flow cross-sections open in a direction parallel to the sheet extension.
2. A sheet material according to Claim 1, characterised in that the spacing element (2) is formed by a material having projections (4) protruding transversely to its extension.
3. A sheet material according to Claim 1, characterised in that the spacing element (2) is formed by a material having depressions (3) indented transversely to its extension.
4. A sheet material according to Claim 3, characterised in that the spacing element (2) has perforations (5).
5. A sheet material according to any one of Claims 1 to 4, characterised in that the spacing element (2) is a lattice with at least two bands of substantially equidirectional strands (3), the intersection or junction points (4) of which are of greater thickness than the individual strands (3).
6. A sheet material according to any one of Claims 1 to 5, characterised in that the spacing element (2) is an open pore sheet material.
EP85905061A 1984-09-05 1985-09-05 Foil material for controllable leakproof separation of the areas located on both of its sides Expired - Lifetime EP0193605B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85905061T ATE38868T1 (en) 1984-09-05 1985-09-05 FILM MATERIAL FOR CONTROLLABLE TIGHT SEPARATION OF THE AREAS LOCATED ON BOTH OF ITS SIDES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843432642 DE3432642A1 (en) 1984-09-05 1984-09-05 FILM MATERIAL FOR CONTROLLABLE SEALING SEPARATE THE AREAS ON ITS BOTH SIDES
DE3432642 1984-09-05

Publications (3)

Publication Number Publication Date
EP0193605A1 EP0193605A1 (en) 1986-09-10
EP0193605B1 true EP0193605B1 (en) 1988-11-23
EP0193605B2 EP0193605B2 (en) 1991-10-23

Family

ID=6244711

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905061A Expired - Lifetime EP0193605B2 (en) 1984-09-05 1985-09-05 Foil material for controllable leakproof separation of the areas located on both of its sides

Country Status (6)

Country Link
EP (1) EP0193605B2 (en)
JP (1) JPS62500163A (en)
AU (1) AU4951985A (en)
CA (1) CA1238197A (en)
DE (2) DE3432642A1 (en)
WO (1) WO1986001554A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3607525A1 (en) * 1986-03-07 1987-09-10 Niederberg Chemie BREAK DETECTOR ON A SLOT WALL
CA1303863C (en) * 1986-06-23 1992-06-23 Walter Van Woudenberg Pressure barrier liner
DE3632951A1 (en) * 1986-09-27 1988-03-31 Dynamit Nobel Ag FLEXIBLE SEALING COATING
DE3714743A1 (en) * 1987-05-02 1988-11-17 Holzmann Philipp Ag Landfill site with a landfill base which can be monitored
DE3717586C2 (en) * 1987-05-25 1996-04-04 Huels Troisdorf Landfill sealing
DE3720519A1 (en) * 1987-06-20 1988-12-29 Flachglas Ag SEALING STRUCTURE FROM A VERTICAL SLOT WALL AND A SEALING WALL ARRANGED THEREOF
DE8902963U1 (en) * 1989-03-10 1990-07-12 Niederberg-Chemie Gmbh, 4133 Neukirchen-Vluyn, De
DE4038962A1 (en) * 1990-12-06 1992-06-11 Akzo Gmbh USE OF A PROTECTIVE MAT FOR SEALING

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3310453A (en) * 1960-12-05 1967-03-21 Bjorksten Res Lab Inc Tear resistant material
FR1577294A (en) * 1968-02-02 1969-08-08
DE2237707A1 (en) * 1972-08-01 1974-02-07 Bayer Ag DRAINAGE ELEMENT FOR EARTH AND GROUND HYDRAULIC ENGINEERING
DE2545762A1 (en) * 1975-10-13 1977-04-21 Rosemeier Kg Flexible hollow body made of plastic films - with cavity for drainage, heat insulation, or buffer layer in package
DE2546753A1 (en) * 1975-10-18 1977-04-28 Isogleitchemie Handels Gmbh Slip foil for buildings and roads - comprising foil pair superimposed over intermediary thin pref. PTFE foil
US4170675A (en) * 1977-05-02 1979-10-09 Flexipane Limited Reinforced flexible panels comprising plastic sheeting on opposed sides of a mesh layer and a metal foil layer in association with a plastic sheet layer

Also Published As

Publication number Publication date
JPS62500163A (en) 1987-01-22
EP0193605B2 (en) 1991-10-23
EP0193605A1 (en) 1986-09-10
DE3432642A1 (en) 1986-03-13
WO1986001554A1 (en) 1986-03-13
CA1238197A (en) 1988-06-21
AU4951985A (en) 1986-03-24
DE3566425D1 (en) 1988-12-29

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