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EP0164496A2 - Diaphragm walls - Google Patents

Diaphragm walls Download PDF

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Publication number
EP0164496A2
EP0164496A2 EP85102150A EP85102150A EP0164496A2 EP 0164496 A2 EP0164496 A2 EP 0164496A2 EP 85102150 A EP85102150 A EP 85102150A EP 85102150 A EP85102150 A EP 85102150A EP 0164496 A2 EP0164496 A2 EP 0164496A2
Authority
EP
European Patent Office
Prior art keywords
diaphragm walls
sealing
sheets
sealing membrane
diaphragm
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.)
Withdrawn
Application number
EP85102150A
Other languages
German (de)
French (fr)
Other versions
EP0164496A3 (en
Inventor
Aloys Schlütter
Bernd Kopp
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.)
Niederberg-Chemie GmbH
Original Assignee
Niederberg-Chemie GmbH
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 Niederberg-Chemie GmbH filed Critical Niederberg-Chemie GmbH
Publication of EP0164496A2 publication Critical patent/EP0164496A2/en
Publication of EP0164496A3 publication Critical patent/EP0164496A3/en
Withdrawn legal-status Critical Current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
    • 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
    • E02D19/185—Joints between sheets constituting the sealing aprons
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ

Definitions

  • the invention relates to diaphragm walls, in particular for civil engineering and tunnel structures.
  • diaphragm walls are z. B. created by filling the excavated earth slots with a thixotropic mass.
  • a thixotropic mass z. 3.
  • the tnixotropic mass counts the task of keeping the side walls of the earth slot stable.
  • concrete slabs made of waterproof concrete can be introduced or the bentonite slurry filled with a suitable concrete so that the diaphragm wall remains watertight and prevents the passage of adjacent liquids.
  • the introduction of concrete slabs or suitable concrete is facilitated by the tessere behavior of thixotropic masses.
  • Thixotropic masses form a relatively solid structure in the rest position. I.e.
  • the width of the diaphragm walls In the simplest cases, the diaphragm walls 15 - 20 cm wide. However, diaphragm walls with a thickness of 50 cm and more are also used,
  • the invention has for its object to reduce the effort for such diaphragm walls. According to the invention this is achieved in that sealing sheets made of plastic are used for the diaphragm walls, which are provided on one side with knobs and are provided at the construction site with a thin layer of in-situ concrete, so that slabs are formed which can easily be replaced by conventional concrete slabs Let the thixotropic mass filling the earth slit lower.
  • the sealing membrane elements are preferably between 1 and 10 m wide and the in-situ concrete layer is between 2 and 3 cm thick.
  • Both PVC soft films and ethylene copolymers (Carbofol) can be used as the waterproofing membrane.
  • the geomembrane elements are provided at the butt ends with connecting elements which ensure a non-positive and tight connection between the individual geomembrane elements.
  • Pipes made of a related plastic material can serve as connecting elements.
  • the pipes are welded to the butt ends of the sheets.
  • the diameters of the pipes are dimensioned so that they are inserted into one another. I.e. the diameter of one tube is chosen so that it can be plugged onto the other tube.
  • the larger pipe to be plugged on is slit on the outside on one side to such an extent that the sealing membrane welded to the other pipe does not hinder the connection process when plugged on.
  • the fit for the two pipes to be inserted into one another is either chosen so that a force-locking connection is created by plugging into one another, or this connection is created when the two sealing membrane elements cannot be avoided with a slight tensile load.
  • the in-situ concrete layer to be applied to the sealing membrane is designed according to the invention such that its weight overcomes the buoyancy and the density of the thixotropic mass (bentonite slurry). After the sealing membrane elements have been lowered, the pipe ends that are open towards the top can be capped or also filled with concrete.
  • sealing membrane elements described above are much thinner than comparable concrete slabs.
  • the sealing membrane elements according to the invention enable the diaphragm wall thickness to be reduced by half compared to conventional diaphragm walls.
  • each sealing membrane element has the same length of 8 m and the same height of 4 m, which cannot be seen in the drawing due to the cross-sectional representation.
  • a sealing membrane of any length can be produced by joining together the various sealing membrane elements 1. While there is an excess length compared to the earth slot to be excavated, the sealing membrane is rolled up at one end or the sealing membrane can be cut to length there. Cutting to length is easy with the plastic materials provided and is possible without any significant work.
  • Each geomembrane element 1 has a welded tube 4 made of the same material at one end and a welded tube 2 made of the same material at the other end.
  • the tube 2 is designed so that it can include the tube 4 - as shown in the drawing. This requires an inner diameter that is slightly larger than the outer diameter of the tube 4 and a slot over the entire length of the tube 2. The longitudinal slot enables the tube 2 to slide past the sealing membrane of the sealing membrane element 1 over the tube 4.
  • the geomembrane elements 1 To assemble the geomembrane elements 1, these are optionally erected individually or to a partial length or the entire length with tubes 2 and 4 inserted into one another. It is set up directly on the thixotropic mass (bentonite slurry) of the excavated earth slot. Thereafter, in-situ concrete is applied from the bottom to the nubbed back of the waterproofing membrane. The in-situ concrete is shown in the drawing on one of the sealing membrane elements 1 and is designated by 3. The in-situ concrete is applied in layers, with the individual layers extending over the length of the waterproofing membrane.
  • thixotropic mass bentonite slurry
  • This in-situ concrete application causes the sealing membrane elements to slowly sink into the thixotropic mass, so that the thixotropic mass itself forms a formwork or support for the sealing membrane elements 1 with the sprayed-on in-situ concrete until it has set.
  • the sealing membrane 1 taking into account the knobs, has a thickness of 4 mm and is therefore in a preferred range of 3 to 5 mm.
  • the tubes 2 and 4 can also each be arranged such that a sealing membrane 1 is provided with a tube 2 at each end and the corresponding sealing membranes are provided with a tube 4 at each end and vice versa.
  • a particularly advantageous application of the diaphragm walls according to the invention is the sealing of landfills, liquid-carrying and liquid-holding systems.
  • landfills there is often the problem of preventing toxins from entering the groundwater from the landfill.
  • earth slots with a depth to a safe subsoil are dug around the landfill or on dangerous sides.
  • the geomembrane elements according to the invention are introduced into the earth slots after filling with bentonite slurry.
  • This method can also be applied to liquid-carrying systems such as river courses and the like.
  • the river water can be kept in his bed with the help of diaphragm walls according to the invention. This is particularly advantageous in dry zones and in sewer construction.
  • Liquid holding systems are e.g. B. ponds or lakes or dams, the liquid to be retained can also be other than water.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Revetment (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

According to the invention, the requisite thickness for diaphragm walls in underground engineering and tunnelling is substantially reduced if first of all a thixotropic mass is put into the dug earth slit and then sealing elements consisting of plastic sealing sheets with applied in-situ concrete are lowered into the thixotropic mass. <IMAGE>

Description

Die Erfindung betrifft Schlitzwände, insbesondere für Tiefbauten und Tunnelbauten.The invention relates to diaphragm walls, in particular for civil engineering and tunnel structures.

Im Tiefbau stellt sich häufig das Problem, die Baugruben gegen eindringendes Wasser abzudichten. Dazu ist bekannt, zunächst Erdschlitze auszuheben, und zwar bis auf festen Untergrund, der kein Wasser durchläßt. Auf dem festen Untergrund wird dann im ausgehobenen Erdschlitz eine Schlitzwand erstellt, die wie ein Schott in der wasserführenden Schicht sitzt und nach Ausheben der Baugrube eine ausreichende Abdichtung gecen eindringendes Wasser bildet.In civil engineering, the problem often arises of sealing the construction pits against the ingress of water. For this purpose, it is known to first dig earth slots, to be precise on a solid surface that does not let water through. A diaphragm wall is then created on the solid subsoil in the excavated earth slot, which sits like a bulkhead in the water-bearing layer and forms an adequate seal against penetrating water after the excavation pit has been excavated.

Im einzelnen werden Schlitzwände z. B. dadurch erstellt, daß die ausgehobenen Erdschlitze mit einer thixotropen Masse gefüllt werden. Als thixotrope Masse kann z. 3. Bentonitschlempe dienen. Das ist eine Tonart. Die tnixotrope Masse rat cie Aufgabe, die Seiterwände des Erdschlitzes stabil zu halten. Anschließend können Betonplatten aus wasserdichtem Beton eingebracht oder die Bentonitschlempe mit einem geeigneten Beton so aufgefüllt werden, daß die Schlitzwand in sich wasserdicht bleibt und den Durchtritt angrenzender Flüssigkeiten verhindert. Das Einbringen von Betonplatten bzw. geeignetem Beton wird durch das tessedere Verhalten thixotroper Massen erleichtert. Thixotrope Massen bilden in der Ruhelage ein relativ festes Gebilde. D. h. nach Einbringen der Bentonitschlempe erstarrt diese praktisch in den Erdschlitzen. Durch Anstoßen der Bentonitschlempe kann diese wie jede andere thixotrope Masse jedoch wieder fließfähig gemacht werden. Diese Eigenschaft wird beim Einbringen der Betonplatten bzw. geeigneten anderen Betcns genutzt. Die Betonplatten sinken dann in der fließfähig werdenden Betonitschlempe leicht nach unten.In particular, diaphragm walls are z. B. created by filling the excavated earth slots with a thixotropic mass. As a thixotropic mass z. 3. Serve bentonite mash. It is a key. The tnixotropic mass counts the task of keeping the side walls of the earth slot stable. Subsequently, concrete slabs made of waterproof concrete can be introduced or the bentonite slurry filled with a suitable concrete so that the diaphragm wall remains watertight and prevents the passage of adjacent liquids. The introduction of concrete slabs or suitable concrete is facilitated by the tessere behavior of thixotropic masses. Thixotropic masses form a relatively solid structure in the rest position. I.e. after the bentonite mash has been introduced, it practically solidifies in the earth slots. By bumping the bentonite mash, however, it can be made flowable again like any other thixotropic mass. This property is used when placing the concrete slabs or other suitable concrete. The concrete slabs then sink slightly downwards in the concrete slurry that becomes fluid.

Je nach Bauvorhaben ergeben sich unterschiedliche Anforderungen an die Breite der Schlitzwände. In einfachsten Fällen sind die Schlitzwände 15-20 cm breit. Es sind jedoch auch Schlitzwände mit einer Dicke von 50 cm und mehr in Anwendung,Depending on the construction project, there are different requirements for the width of the diaphragm walls. In the simplest cases, the diaphragm walls 15 - 20 cm wide. However, diaphragm walls with a thickness of 50 cm and more are also used,

Der Erfindung liegt die Aufgabe zugrunde, den Aufwand für derartige Schlitzwände zu verringern. Nach der Erfindung wird das dadurch erreicht, daß für die Schlitzwände Dichtungsbahnen aus Kunststoff verwendet werden, die einseitig mit Noppen versehen sind und an der Baustelle mit einer dünnen Ortbetonschicht versehen werden, so daß Platten entstehen, die sich anstelle üblicher Betonplatten leicht in die den jeweiliegen Erdschlitz ausfüllende thixotrope Masse absenken lassen. Vorzugsweise sind die Dichtungsbahnelemente zwischen 1 und 10 m breit und ist die Ortbetonschicht zwischen 2 und 3 cm stark.The invention has for its object to reduce the effort for such diaphragm walls. According to the invention this is achieved in that sealing sheets made of plastic are used for the diaphragm walls, which are provided on one side with knobs and are provided at the construction site with a thin layer of in-situ concrete, so that slabs are formed which can easily be replaced by conventional concrete slabs Let the thixotropic mass filling the earth slit lower. The sealing membrane elements are preferably between 1 and 10 m wide and the in-situ concrete layer is between 2 and 3 cm thick.

Als Abdichtungsbahn können sowohl PVC-Weichfolien als auch Ethylen-Copolymerisate (Carbofol) verwendet werden.Both PVC soft films and ethylene copolymers (Carbofol) can be used as the waterproofing membrane.

In weiterer Ausbildung der Erfindung sind die Dichtungsbahnelemente an den Stoßenden mit Verbindungselementen versehen, die eine kraftschlüssige und dichte Verbindung zwischen den einzelnen Dichtungsbahnelementen sicherstellen. Als Verbindungselemente können Rohre aus einem verwandten Kunststoffmaterial dienen. Die Rohre werden an die Stoßenden der Bahnen angeschweißt. Die Durchmesser der Rohre sind so bemessen, daß sie ineinandergesteckt werden. D. h. der Durchmesser des einen Rohres ist so gewählt, daß es sich auf das andere Rohr aufstecken läßt. Zugleich ist das größere, aufzusteckende_Rohr außen einseitig soweit aufgeschlitzt, daß beim Aufstecken die am anderen Rohr angeschweißte Dichtungsbahn den Verbindungsvorgang nicht behindert.In a further embodiment of the invention, the geomembrane elements are provided at the butt ends with connecting elements which ensure a non-positive and tight connection between the individual geomembrane elements. Pipes made of a related plastic material can serve as connecting elements. The pipes are welded to the butt ends of the sheets. The diameters of the pipes are dimensioned so that they are inserted into one another. I.e. the diameter of one tube is chosen so that it can be plugged onto the other tube. At the same time, the larger pipe to be plugged on is slit on the outside on one side to such an extent that the sealing membrane welded to the other pipe does not hinder the connection process when plugged on.

Die Passung für die beiden ineinander zu steckenden Rohre ist entweder so gewählt, daß bereits durch das Ineinanderstecken eine kraftschlüssige Verbindung entsteht oder diese Verbindung entsteht bei nicht vermeidbarer, geringfügiger Zugbelastung der beiden Dichtungsbahnelemente. Die auf die Dichtungsbahn aufzubringende Ortbetonschicht wird nach der Erfindung jeweils so ausgelegt, daß ihr Gewicht die Auftriebskraft und die Dichte der thixotropen Masse (Bentonitschlempe) überwindet. Nach dem Absenken der Dichtungsbahnelemente können die nach oben hin offenen Rohrenden mit einer Kappe versehen oder ebenfalls mit Beton gefüllt werden.The fit for the two pipes to be inserted into one another is either chosen so that a force-locking connection is created by plugging into one another, or this connection is created when the two sealing membrane elements cannot be avoided with a slight tensile load. The in-situ concrete layer to be applied to the sealing membrane is designed according to the invention such that its weight overcomes the buoyancy and the density of the thixotropic mass (bentonite slurry). After the sealing membrane elements have been lowered, the pipe ends that are open towards the top can be capped or also filled with concrete.

Die oben beschriebenen Dichtungsbahnelemente sind wesentlich dünner als vergleichbare Betonplatten. Im Ergebnis ermöglichen die erfindungsgemäßen Dichtungsbahnelemente eine Verringerung der Schlitzwanddicke gegenüber herkömmlichen Schlitzwänden auf die Hälfte.The sealing membrane elements described above are much thinner than comparable concrete slabs. As a result, the sealing membrane elements according to the invention enable the diaphragm wall thickness to be reduced by half compared to conventional diaphragm walls.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt.In the drawing, an embodiment of the invention is shown.

Mit 1 sind verschiedene Dichtungsbahnelemente bezeichnet. Jedes Dichtungsbahnelement hat im Ausführungsbeispiel die gleiche Länge von 8 m und die gleiche, in der Zeichnung aufgrund der Querschnittsdarstellung nicht erkennbare Höhe von 4 m. Durch Aneinanderfügen der verschiedenen Dichtungsbahnelemente 1 kann eine Dichtungsbahn beliebiger Länge hergestellt werden. Während sich dabei eine Überlänge gegenüber dem auszuhebenden Erdschlitz ergibt, wird die Dichtungsbahn an einem Ende aufgerollt oder läßt sich die Dichtungsbahn dort ablängen. Das Ablängen ist bei den vorgesehenen Kunststoffmaterialien einfach.und ohne nennenswerten Arbeitsaufwand möglich. Jedes Dichtungsbahnelement 1 besitzt an einem Ende ein angeschweißtes Rohr 4 aus gleichem Material und am anderen Ende ein angeschweißtes Rohr 2 aus gleichem Material. Das Rohr 2 ist so ausgelegt, daß es das Rohr 4 - wie in der Zeichnung dargestellt - umfassen kann. Das bedingt einen Innendurchmesser, der geringfügig größer als der Außendurchmesser des Rohres 4 ist, und einen Schlitz über die gesamte Länge des Rohres 2. Der Längsschlitz ermöglicht es dem Rohr 2, an der Dichtungsbahn des Dichtungsbahnelementes 1 vorbei über das Rohr 4 zu gleiten.Different sealing membrane elements are designated by 1. In the exemplary embodiment, each sealing membrane element has the same length of 8 m and the same height of 4 m, which cannot be seen in the drawing due to the cross-sectional representation. A sealing membrane of any length can be produced by joining together the various sealing membrane elements 1. While there is an excess length compared to the earth slot to be excavated, the sealing membrane is rolled up at one end or the sealing membrane can be cut to length there. Cutting to length is easy with the plastic materials provided and is possible without any significant work. Each geomembrane element 1 has a welded tube 4 made of the same material at one end and a welded tube 2 made of the same material at the other end. The tube 2 is designed so that it can include the tube 4 - as shown in the drawing. This requires an inner diameter that is slightly larger than the outer diameter of the tube 4 and a slot over the entire length of the tube 2. The longitudinal slot enables the tube 2 to slide past the sealing membrane of the sealing membrane element 1 over the tube 4.

Zur Montage der-Dichtungsbahnelemente 1 werden diese wahlweise einzeln aufrecht oder zu einer Teillänge oder der gesamten Länge mit ineinandergesteckten Rohren 2 und 4 aufgestellt. Die Aufstellung erfolgt unmittelbar auf der thixotropen Masse (Bentonitschlempe) des ausgehobenen Erdschlitzes. Danach wird von unten beginnend Ortbeton auf die mit Noppen versehene Rückseite der Dichtungsbahnen aufgetragen. Der Ortbeton ist in der Zeichnung an einem der Dichtungsbahnelemente 1 dargestellt und mit 3 bezeichnet. Der Ortbeton wird lagenweise aufgetragen, wobei die einzelnen Lagen sich über die Länge der Abdichtungsbahn erstrecken. Diese Ortbetonaufbringung bewirkt, daß die Abdichtungsbahnelemente langsam in die thixotrope Masse einsinken, so daß die thixotrope Masse zugleich selbst solange eine Schalung bzw. Stütze für die Dichtungsbannelemente 1 mit dem aufgespritzten Ortbeton bilden, bis dieser abgebunden ist.To assemble the geomembrane elements 1, these are optionally erected individually or to a partial length or the entire length with tubes 2 and 4 inserted into one another. It is set up directly on the thixotropic mass (bentonite slurry) of the excavated earth slot. Thereafter, in-situ concrete is applied from the bottom to the nubbed back of the waterproofing membrane. The in-situ concrete is shown in the drawing on one of the sealing membrane elements 1 and is designated by 3. The in-situ concrete is applied in layers, with the individual layers extending over the length of the waterproofing membrane. This in-situ concrete application causes the sealing membrane elements to slowly sink into the thixotropic mass, so that the thixotropic mass itself forms a formwork or support for the sealing membrane elements 1 with the sprayed-on in-situ concrete until it has set.

Im Ausführungsbeispiel hat die Abdichtungsbahn 1 unter Berücksichtigung der Noppen eine Dicke von 4 mn und liegt damit in einem bevorzugten Bereich von 3 bis 5 mm.In the exemplary embodiment, the sealing membrane 1, taking into account the knobs, has a thickness of 4 mm and is therefore in a preferred range of 3 to 5 mm.

Die Rohre 2 und 4 können jeweils auch so angeordnet werden, daß eine Abdichtungsbahn 1 an jedem Ende mit einem Rohr 2 und die korrespondierenden Abdichtungsbahnen an jedem Ende mit einem Rohr 4 und umgekehrt versehen sind.The tubes 2 and 4 can also each be arranged such that a sealing membrane 1 is provided with a tube 2 at each end and the corresponding sealing membranes are provided with a tube 4 at each end and vice versa.

Eine besonders vorteilhafte Anwendung der erfindungsgemäßen Schlitzwände ist die Abdichtung von Deponien, flüssigkeitsführenden und flüssigkeitshaltenden Systemen. Bei Deponien stellt sich häufig das Problem, das Eindringen von Giftstoffen aus der Deponie in das Grundwasser zu verhindern. In solchen Fällen werden um die Deponie herum bzw. an gefahrbringenden Seiten Erdschlitze mit einer Tiefe bis zu einem sicheren Untergrund ausgehoben. In die Erdschlitze werden nach Einfüllen von Bentonitschlempe die erfindungsgemäßen Dichtungsbahnelemente eingebracht.A particularly advantageous application of the diaphragm walls according to the invention is the sealing of landfills, liquid-carrying and liquid-holding systems. In landfills, there is often the problem of preventing toxins from entering the groundwater from the landfill. In such cases, earth slots with a depth to a safe subsoil are dug around the landfill or on dangerous sides. The geomembrane elements according to the invention are introduced into the earth slots after filling with bentonite slurry.

Dieses Verfahren läßt sich auch anwenden auf flüssigkeitsführende Systeme wie Flußläufe und dergleichen. Hier kann mit Hilfe erfindungsgemäßer Schlitzwände das Flußwasser in seinem Bett gehalten werden. Das ist insbesondere in Trockenzonen und im Kanalbau von Vorteil.This method can also be applied to liquid-carrying systems such as river courses and the like. Here the river water can be kept in his bed with the help of diaphragm walls according to the invention. This is particularly advantageous in dry zones and in sewer construction.

Flüssigkeitshaltende Systeme sind z. B. Teiche oder Seen oder Dämme, wobei die zurückzuhaltende Flüssigkeit auch eine andere als Wasser sein kann.Liquid holding systems are e.g. B. ponds or lakes or dams, the liquid to be retained can also be other than water.

Claims (5)

1. Schlitzwände, insbesondere für Tiefbauten und Tunnelbauten, wobei zunächst Erdschlitze ausgehoben und mit thixotroper Masse gefüllt werden und anschließend Dichtungselemente in die thixotrope Masse abgesenkt werden, dadurch gekennzeichnet, daß die Dichtungselemente aus Kunststoffdichtungsbahnen mit aufgebrachtem Ortbeton bestehen.1. diaphragm walls, in particular for civil engineering and tunnel structures, where first earth slots are excavated and filled with thixotropic mass and then sealing elements are lowered into the thixotropic mass, characterized in that the sealing elements consist of plastic sealing sheets with applied in-situ concrete. 2. Schlitzwände nach Anspruch 1, dadurch gekennzeichnet, daß die Dichtungsbahnen (1) als Noppenbahnen ausgebildet sind und der Ortbeton an der Noppenseite aufgebracht ist.2. diaphragm walls according to claim 1, characterized in that the sealing sheets (1) are designed as knobbed sheets and the in-situ concrete is applied to the knob side. 3. Schlitzwände nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Dichtungsbahnen mit Verbindungselementen versehen sind.3. diaphragm walls according to claim 1 or 2, characterized in that the sealing sheets are provided with connecting elements. 4. Schlitzwände nach Anspruch 3, dadurch gekennzeichnet, die Verbindungselemente aus ineinandersteckbaren, mit den Kunststoffbahnen (1) verschweißten Rohren (2, 4) bestehen, von denen das äußere Ronr einen Längsschlitz aufweist.4. slotted walls according to claim 3, characterized in that the connecting elements consist of nested, with the plastic sheets (1) welded tubes (2, 4), of which the outer ring has a longitudinal slot. 5. Schlitzwände nach einem oder mehreren der Ansprüche 1 bis 4, gekennzeichnet durch die Anwendung auf Deponien und/oder flüssigkeitsführenden und/oder flüssigkeitshaltenden Systemen.5. diaphragm walls according to one or more of claims 1 to 4, characterized by the application to landfills and / or liquid-carrying and / or liquid-holding systems.
EP85102150A 1984-06-15 1985-02-27 Diaphragm walls Withdrawn EP0164496A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3422275 1984-06-15
DE19843422275 DE3422275A1 (en) 1984-06-15 1984-06-15 SLOT WALLS

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EP0164496A2 true EP0164496A2 (en) 1985-12-18
EP0164496A3 EP0164496A3 (en) 1986-08-06

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DE2918276A1 (en) * 1979-05-07 1980-11-20 Friedrichsfeld Gmbh Concrete slab butt joint seal - by plastic filler material in recesses and seal rings
FR2526825A1 (en) * 1982-05-14 1983-11-18 Soletanche ELEMENT FOR PRODUCING MOLDED WALL PANELS IN THE SOIL, WALLS COMPRISING SUCH AN ELEMENT AND METHOD FOR PRODUCING SUCH WALL
WO1984003315A1 (en) * 1983-02-22 1984-08-30 Finic Bv Environmental cut-off for deep excavations

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Publication number Priority date Publication date Assignee Title
FR2252012A5 (en) * 1973-11-16 1975-06-13 Pasquiet Daniel Panel for underground chamber construction - comprises inner and outer concrete layers sandwiching waterproof membrane
DE2918276A1 (en) * 1979-05-07 1980-11-20 Friedrichsfeld Gmbh Concrete slab butt joint seal - by plastic filler material in recesses and seal rings
FR2526825A1 (en) * 1982-05-14 1983-11-18 Soletanche ELEMENT FOR PRODUCING MOLDED WALL PANELS IN THE SOIL, WALLS COMPRISING SUCH AN ELEMENT AND METHOD FOR PRODUCING SUCH WALL
WO1984003315A1 (en) * 1983-02-22 1984-08-30 Finic Bv Environmental cut-off for deep excavations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343851C1 (en) * 1993-12-22 1995-06-29 Bauer Spezialtiefbau Reinforced concrete underground curtain

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DE3422275A1 (en) 1985-12-19

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