DE3822474A1 - Base seal for landfill sites - Google Patents

Base seal for landfill sites

Info

Publication number
DE3822474A1
DE3822474A1 DE19883822474 DE3822474A DE3822474A1 DE 3822474 A1 DE3822474 A1 DE 3822474A1 DE 19883822474 DE19883822474 DE 19883822474 DE 3822474 A DE3822474 A DE 3822474A DE 3822474 A1 DE3822474 A1 DE 3822474A1
Authority
DE
Germany
Prior art keywords
sealing layer
mineral
base seal
seal
layer
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.)
Granted
Application number
DE19883822474
Other languages
German (de)
Other versions
DE3822474C2 (en
Inventor
Des Erfinders Auf Nennung Verzicht
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.)
Bilfinger SE
Original Assignee
Bilfinger und Berger Bau AG
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 Bilfinger und Berger Bau AG filed Critical Bilfinger und Berger Bau AG
Priority to DE19883822474 priority Critical patent/DE3822474C2/en
Publication of DE3822474A1 publication Critical patent/DE3822474A1/en
Application granted granted Critical
Publication of DE3822474C2 publication Critical patent/DE3822474C2/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE
    • B09B1/00—Dumping solid waste
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/16—Sealings or joints
    • 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

Abstract

The invention relates to a base seal for landfill sites which consists of a top sealing layer of welded plastic sealing sheets, a mineral sealing layer arranged directly under it, and a bottom sealing layer of welded plastic sheets.

Description

Die Erfindung betrifft eine Basisabdichtung für Abfalldeponien nach dem Oberbegriff des Anspruchs 1.The invention relates to a basic seal for landfills after Preamble of claim 1.

Die Basisabdichtungen vieler neuangelegter Deponien werden heute als soge­ nannte "Kombinationsdichtung" (bestehend aus verschweißten Kunststoffdich­ tungsbahnen und einer darunter angeordneten Schicht aus minderalischen Stoffen mit einer Schichtdicke zwischen ca. 30 bis 100 cm) ausgeführt. Diese Ausführungsart der Basisabdichtung hat sich in den letzten Jahren durchgesetzt, da sie kostengünstig und relativ problemlos herzustellen ist. Weiterhin weist sie den Vorteil auf, daß die Permeation von organi­ schen Stoffen (KW) und chlorierten organischen Stoffen (CKW) stark redu­ ziert ist. In erster Linie soll jedoch mit der Anordnung einer minerali­ schen Dichtungsschicht unter einer Lage verschweißter Kunststoffdichtungs­ bahnen das Ziel verfolgt werden, im Falle einer Leckage der Kunststoff­ dichtungsbahnen den ungehinderten Durchfluß der Sickerwässer aus dem Depo­ niematerial in den Untergrund zu verhindern.The basic seals of many newly created landfills are known today as so-called called "combination seal" (consisting of welded plastic seal lanes and an underlying layer of mineral Fabrics with a layer thickness between approx. 30 to 100 cm). This type of design of the basic seal has changed in recent years enforced because they are inexpensive and relatively easy to manufacture is. Furthermore, it has the advantage that the permeation of organi substances (KW) and chlorinated organic substances (CKW) greatly reduced is adorned. In the first place, however, the arrangement of a minerali sealing layer under a layer of welded plastic sealing to pursue the goal in case of leakage of the plastic geomembranes the unimpeded flow of the leachate from the depo to prevent any material from going underground.

Neuere Untersuchungen und Laborversuche haben jedoch gezeigt, daß infolge Erwärmung des Deponiegutes, beispielsweise in Hausmülldeponien, auch die mineralische Dichtungsschicht erwärmt wird und somit ein Temperaturgefälle zum Untergrund besteht. Infolge des höheren Wasserdampfpartialdruckes in der mineralischen Dichtungsschicht gegenüber dem Untergrund wandert die Feuchtigkeit in den kühleren Untergrund ab mit der Folge, daß die mine­ ralische Dichtungsschicht austrocknet und rissig wird und damit ihre dichtende Funktion verliert.However, recent studies and laboratory tests have shown that as a result Warming up of the landfill, for example in domestic waste landfills, also the mineral sealing layer is heated and thus a temperature gradient to the subsurface. Due to the higher water vapor partial pressure in the mineral sealing layer against the subsurface migrates Moisture in the cooler underground with the result that the mine ralic sealing layer dries out and becomes cracked and with it yours sealing function loses.

Der Erfindung liegt nun die Aufgabe zugrunde, eine Basisabdichtung für Ab­ falldeponien anzugeben, die die Austrocknung der mineralischen Dichtungs­ schicht auf Dauer verhindert, wobei die günstige Nebenwirkung der Kombi­ nationsdichtung - Reduzierung der Permeation von organischen und chlorier­ ten Stoffen - erhalten bleibt.The invention is based on the object of providing a basic seal for landfills from, which prevents the drying out of the mineral sealing layer in the long run, the beneficial side effect of the combi nation seal - reducing the permeation of organic and chlorinated substances - is retained.

Diese Aufgabe wird durch den kennzeichnenden Teil des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen an­ gegeben.This object is solved by the characterizing part of claim 1. Advantageous developments of the invention are in the subclaims given.

Claims (4)

1. Basisabdichtung für Abfalldeponien, bestehend aus verschweißten Kunst­ stoffdichtungsbahnen und einer unmittelbar darunter angeordneten Ab­ dichtungsschicht aus einem mineralischen Stoff oder Stoffgemisch, dadurch gekennzeichnet, daß unter der minerali­ schen Abdichtungsschicht (2) eine weitere Abdichtungsschicht (3) aus verschweißten Kunststoffabdichtungsbahnen angeordnet ist, die das Aus­ trocknen der mineralischen Abdichtungsschicht (2) verhindert.1. Basic seal for landfills, consisting of welded plastic geomembranes and a sealing layer arranged immediately below from a mineral substance or mixture of substances, characterized in that a further sealing layer ( 3 ) of welded plastic geomembranes is arranged under the mineral's sealing layer ( 2 ) prevents the mineral sealing layer ( 2 ) from drying out. 2. Basisabdichtung nach Anspruch 1, dadurch gekennzeich­ net, daß zwischen der mineralischen Abdichtungsschicht (2) und der unteren Abdichtungsschicht (3) eine Schutzschicht (4) aus Erdstoff ange­ ordnet ist, die die untere Abdichtungsschicht (3) beim Einbau und Ver­ dichten der mineralischen Abdichtungsschicht (3) vor Beschädigungen schützt.2. Base seal according to claim 1, characterized in that between the mineral sealing layer ( 2 ) and the lower sealing layer ( 3 ) a protective layer ( 4 ) made of earth is arranged, which seal the lower sealing layer ( 3 ) during installation and Ver mineral sealing layer ( 3 ) protects against damage. 3. Basisabdichtung nach Anspruch 2, dadurch gekennzeich­ net, daß die Schutzschicht (4) aus einem wasserdurchlässigen Erd­ stoff (5), z. B. kiesigem Sand, hergestellt ist und mit Bewässerungs­ leitungen (6) und Entlüftungsleitungen (7) verbunden ist, womit der Porenraum teilweise oder vollständig unter Entweichen der Porenraumluft mit Wasser auffüllbar ist.3. Base seal according to claim 2, characterized in that the protective layer ( 4 ) made of a water-permeable earth material ( 5 ), for. B. pebble sand is made and is connected to irrigation lines ( 6 ) and ventilation lines ( 7 ), whereby the pore space can be filled with water partially or completely while escaping the pore space air. 4. Basisabdichtung nach Anspruch 1 oder 3, dadurch gekenn­ zeichnet, daß die obere Abdichtungsschicht (1) mit der unteren Abdichtungsschicht (3) durch verschweißte Stege (8) verbunden ist, so daß die gesamte Basisabdichtung in 2 oder mehrere flüssigkeitsdichte Felder unterteilt ist.4. Base seal according to claim 1 or 3, characterized in that the upper sealing layer ( 1 ) with the lower sealing layer ( 3 ) is connected by welded webs ( 8 ), so that the entire base seal is divided into 2 or more liquid-tight fields.
DE19883822474 1988-07-02 1988-07-02 Basic sealing for landfills Revoked DE3822474C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883822474 DE3822474C2 (en) 1988-07-02 1988-07-02 Basic sealing for landfills

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883822474 DE3822474C2 (en) 1988-07-02 1988-07-02 Basic sealing for landfills

Publications (2)

Publication Number Publication Date
DE3822474A1 true DE3822474A1 (en) 1990-01-04
DE3822474C2 DE3822474C2 (en) 1995-05-04

Family

ID=6357848

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883822474 Revoked DE3822474C2 (en) 1988-07-02 1988-07-02 Basic sealing for landfills

Country Status (1)

Country Link
DE (1) DE3822474C2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003007A1 (en) * 1990-01-29 1991-08-01 Koenig Klaus Dipl Ing Soil sealing system for protection against harmful materials - has compacted base covered by concrete between polyethylene film layers, reinforced concrete and filter and drainage layer
DE4006814A1 (en) * 1990-03-05 1991-09-12 Aew Plan Gmbh Fuer Abfall En W Seal for waste tip - has central mineral layer enclosed by two asphalt layers and fluid impermeable lower asphalt layer
DE4038962A1 (en) * 1990-12-06 1992-06-11 Akzo Gmbh USE OF A PROTECTIVE MAT FOR SEALING
DE4417312A1 (en) * 1993-06-18 1994-12-22 Huels Troisdorf Protective layer for landfill and other seals

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565468A (en) * 1983-10-24 1986-01-21 Crawford Leslie A Moisture impervient barrier and method for making same
DE3502980A1 (en) * 1984-10-01 1986-07-31 Ed. Züblin AG, 7000 Stuttgart Arrangement for the base seal of storage basins and landfill sites and for the repair of the same
DE3539193A1 (en) * 1985-02-19 1987-06-04 Bilfinger Berger Bau Sealing cover for landfill sites
DE3700645A1 (en) * 1987-01-12 1988-07-21 Niederberg Chemie SEALING FOR NEW DEPOSITIES

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565468A (en) * 1983-10-24 1986-01-21 Crawford Leslie A Moisture impervient barrier and method for making same
DE3502980A1 (en) * 1984-10-01 1986-07-31 Ed. Züblin AG, 7000 Stuttgart Arrangement for the base seal of storage basins and landfill sites and for the repair of the same
DE3539193A1 (en) * 1985-02-19 1987-06-04 Bilfinger Berger Bau Sealing cover for landfill sites
DE3700645A1 (en) * 1987-01-12 1988-07-21 Niederberg Chemie SEALING FOR NEW DEPOSITIES

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
DE-Z.: "Kunststoffe im Bau" 4/85, S. 208-212 *
DE-Z.: "Müll und Abfall" 7/88, S. 295-302 *
DE-Z.: "Müll und Abfall" 8/85, S. 253-258 *
DE-Z.: wlb-wasser, luft und betrieb 6/87 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003007A1 (en) * 1990-01-29 1991-08-01 Koenig Klaus Dipl Ing Soil sealing system for protection against harmful materials - has compacted base covered by concrete between polyethylene film layers, reinforced concrete and filter and drainage layer
DE4006814A1 (en) * 1990-03-05 1991-09-12 Aew Plan Gmbh Fuer Abfall En W Seal for waste tip - has central mineral layer enclosed by two asphalt layers and fluid impermeable lower asphalt layer
DE4038962A1 (en) * 1990-12-06 1992-06-11 Akzo Gmbh USE OF A PROTECTIVE MAT FOR SEALING
DE4417312A1 (en) * 1993-06-18 1994-12-22 Huels Troisdorf Protective layer for landfill and other seals

Also Published As

Publication number Publication date
DE3822474C2 (en) 1995-05-04

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8120 Willingness to grant licenses paragraph 23
D2 Grant after examination
8363 Opposition against the patent
8331 Complete revocation