EP0164496A2 - Parois diaphragme - Google Patents

Parois diaphragme 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Withdrawn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)
English (en)
Other versions
EP0164496A3 (fr
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/fr
Publication of EP0164496A3 publication Critical patent/EP0164496A3/fr
Withdrawn legal-status Critical Current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
    • 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.

Landscapes

  • 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)
EP85102150A 1984-06-15 1985-02-27 Parois diaphragme Withdrawn EP0164496A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3422275 1984-06-15
DE19843422275 DE3422275A1 (de) 1984-06-15 1984-06-15 Schlitzwaende

Publications (2)

Publication Number Publication Date
EP0164496A2 true EP0164496A2 (fr) 1985-12-18
EP0164496A3 EP0164496A3 (fr) 1986-08-06

Family

ID=6238449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85102150A Withdrawn EP0164496A3 (fr) 1984-06-15 1985-02-27 Parois diaphragme

Country Status (2)

Country Link
EP (1) EP0164496A3 (fr)
DE (1) DE3422275A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343851C1 (de) * 1993-12-22 1995-06-29 Bauer Spezialtiefbau Ortbetonschlitzwand mit Abdichtungsmembran

Citations (4)

* Cited by examiner, † Cited by third party
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 (de) * 1979-05-07 1980-11-20 Friedrichsfeld Gmbh Stossfugenverschluss fuer betonformteile
FR2526825A1 (fr) * 1982-05-14 1983-11-18 Soletanche Element pour la realisation de panneaux de parois moulees dans le sol, parois comportant un tel element et procede pour la realisation d'une telle paroi
WO1984003315A1 (fr) * 1983-02-22 1984-08-30 Finic Bv Barriere de protection de l'environnement pour excavations profondes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8200466A (nl) * 1982-02-08 1983-09-01 Stevin Volker Beton Water Werkwijze voor het vervaardigen van een de stroming van grondwater afsluitend scherm.

Patent Citations (4)

* Cited by examiner, † Cited by third party
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 (de) * 1979-05-07 1980-11-20 Friedrichsfeld Gmbh Stossfugenverschluss fuer betonformteile
FR2526825A1 (fr) * 1982-05-14 1983-11-18 Soletanche Element pour la realisation de panneaux de parois moulees dans le sol, parois comportant un tel element et procede pour la realisation d'une telle paroi
WO1984003315A1 (fr) * 1983-02-22 1984-08-30 Finic Bv Barriere de protection de l'environnement pour excavations profondes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343851C1 (de) * 1993-12-22 1995-06-29 Bauer Spezialtiefbau Ortbetonschlitzwand mit Abdichtungsmembran

Also Published As

Publication number Publication date
DE3422275A1 (de) 1985-12-19
EP0164496A3 (fr) 1986-08-06

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Inventor name: SCHLUETTER, ALOYS