EP0190409B1 - Underground walls with impermeable sheets - Google Patents
Underground walls with impermeable sheets Download PDFInfo
- Publication number
- EP0190409B1 EP0190409B1 EP85114254A EP85114254A EP0190409B1 EP 0190409 B1 EP0190409 B1 EP 0190409B1 EP 85114254 A EP85114254 A EP 85114254A EP 85114254 A EP85114254 A EP 85114254A EP 0190409 B1 EP0190409 B1 EP 0190409B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- grooves
- outer tube
- elements
- connecting elements
- 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.)
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- 238000007789 sealing Methods 0.000 claims abstract description 30
- 230000009974 thixotropic effect Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 239000011343 solid material Substances 0.000 claims description 5
- 239000012528 membrane Substances 0.000 description 26
- 238000011065 in-situ storage Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 239000002002 slurry Substances 0.000 description 5
- 238000004078 waterproofing Methods 0.000 description 5
- 229910000278 bentonite Inorganic materials 0.000 description 4
- 239000000440 bentonite Substances 0.000 description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 108700012359 toxins Proteins 0.000 description 1
Images
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
-
- 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
Definitions
- the invention relates to diaphragm walls, in particular for civil engineering and tunnel constructions, in which first earth slots are excavated and filled with thixotropic mass and then sealing elements are lowered into the thixotropic mass, these sealing membranes formed by plastic sheets being provided with connecting elements and the connecting elements being made of nested, with the plastic sheets welded tubes exist, of which the outer tube has a longitudinal slot.
- diaphragm walls are z. B .. created by filling the excavated earth slots with a thixotropic mass.
- a thixotropic mass z. B. serve Bentonitschlempe. It is a key.
- the thixotropic mass has the task of keeping the side walls of the earth slot stable. Then concrete. Slabs of waterproof concrete are introduced or the bentonite slurry is filled with a suitable concrete so that the diaphragm wall remains watertight and prevents the passage of adjacent liquids.
- the special behavior of thixotropic masses facilitates the introduction of concrete slabs or suitable concrete.
- Thixotropic masses form a relatively solid structure in the rest position. I.e.
- the diaphragm walls are 15-20 cm wide. However, diaphragm walls with a thickness of 50 cm and more are also used.
- the effort for such diaphragm walls can be reduced by using sealing sheets made of plastic for the diaphragm walls, which are provided with nubs on one side and provided with a thin layer of in-situ concrete at the construction site, so that slabs are formed which are instead of the usual ones Allow concrete slabs to be slightly lowered into the thixotropic mass filling the respective earth slot.
- 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 outer, slotted tube sits with a relatively large amount of play on the inner closed tube.
- the slot in the outer tube inevitably has a lot of play, so that the welded sealing membrane is not cut through by the sharp tube edges when the outer tube is pushed onto the inner tube or, conversely, the inner tube is pushed into the outer one.
- the object of the invention is to improve the known connecting elements. According to the invention this is achieved in that the outer tube has grooves or grooves on the inside and the inner tube is provided with webs which fit into the grooves. The webs sliding into the grooves form a seal.
- 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 without any noteworthy Workload possible.
- 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 sealing membrane elements 1 To assemble the sealing membrane elements 1, these are either erected individually or up to a partial length or the entire length with tubes 2 and 4 inserted into one another. The installation takes place 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 is set.
- the waterproofing membrane can also be weighted down with a steel rail, which causes the waterproofing membrane to sink in.
- 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.
- the sealing membrane elements 1 have a length of 0.5 to 2 m and are provided laterally instead of the tubes 2 with welded tubes 6 and instead of the tubes 4 with welded solid material 8.
- the tubes 6 have grooves or grooves 7 on the inside.
- the other solid material 8 is provided with webs 9, so that the material 8 with these webs 9 can be inserted into the grooves 7 of the neighboring tube 6 and slide downward therein.
- a tongue and groove system ensures the sealing of the pipe connections and at the same time serves to stiffen the elements with one another.
- the diameters of the two nested parts are to be coordinated so that the inner material 8 exerts a kind of wedge effect on the outer tube 6 and the wedges are pressed firmly into the groove. This creates a labyrinth seal.
- the outer tube 6 and the solid material 8 are preferably made of polyethylene.
- the polyethylene develops a higher sliding effect at higher pressures. This is extremely beneficial to the press fit according to the invention between the tube 6 and the solid material 8.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
- Revetment (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Die Erfindung betrifft 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, wobei diese von Kunststoffbahnen gebildeten Dichtungsbahnen mit Verbindungselementen versehen sind und die Verbindungselemente aus ineinandersteckbaren, mit den Kunststoffbahnen verschweißten Rohren bestehen, von denen das äußere Rohr einen Längsschlitz aufweist.The invention relates to diaphragm walls, in particular for civil engineering and tunnel constructions, in which first earth slots are excavated and filled with thixotropic mass and then sealing elements are lowered into the thixotropic mass, these sealing membranes formed by plastic sheets being provided with connecting elements and the connecting elements being made of nested, with the plastic sheets welded tubes exist, of which the outer tube has a longitudinal slot.
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 gegen 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 allow water to pass 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. B. Bentonitschlempe dienen. Das ist eine Tonart. Die thixotrope Masse hat die Aufgabe, die Seitenwände des Erdschlitzes stabil zu halten. Anschließend können Beton- . platten 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 besondere Verhalten thixotroper Massen erleichtert. Thixotrope Massen bilden in der Ruhelage ein relativ festes Gebilde. D. h. nach Einbringen der Betonitschlempe 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 Betons 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. B. serve Bentonitschlempe. It is a key. The thixotropic mass has the task of keeping the side walls of the earth slot stable. Then concrete. Slabs of waterproof concrete are introduced or the bentonite slurry is filled with a suitable concrete so that the diaphragm wall remains watertight and prevents the passage of adjacent liquids. The special behavior of thixotropic masses facilitates the introduction of concrete slabs or suitable concrete. Thixotropic masses form a relatively solid structure in the rest position. I.e. after inserting the concrete slurry, it practically solidifies in the 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 are 15-20 cm wide. However, diaphragm walls with a thickness of 50 cm and more are also used.
Nach einem älteren Vorschlag kann der Aufwand für derartige Schlitzwände dadurch verringert werden, 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 jeweiligen 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.According to an older proposal, the effort for such diaphragm walls can be reduced by using sealing sheets made of plastic for the diaphragm walls, which are provided with nubs on one side and provided with a thin layer of in-situ concrete at the construction site, so that slabs are formed which are instead of the usual ones Allow concrete slabs to be slightly lowered into the thixotropic mass filling the respective earth slot. 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.
Bei den Dichtungsbahnen aus Kunststoff stellt sich für Erdschlitze die Frage der Handhabung bei größeren Schlitzlängen. Nach der WO-A-8 403 315 soll dieses Problem dadurch gelöst werden, daß die Dichtungsbahnelemente an den Stoßenden mit Verbindungselementen versehen sind, die eine kraftschlüssige und dichte Verbindung zwischen den einzelnen Dichtungsbahnelementen sicherstellen. Als Verbindungselemente sind Rohre aus einem verwandten Kunststoffmaterial vorgesehen. 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 geschlitzt, daß beim Aufstecken die am Rohr angeschweißte Dichtungsbahn den Verbindungsvorgang nicht behindert.In the case of geomembranes made of plastic, the question of how to handle larger slot lengths arises. According to WO-A-8 403 315 this problem is to be solved in that the sealing membrane elements are provided at the butt ends with connecting elements which ensure a non-positive and tight connection between the individual sealing membrane elements. Pipes made of a related plastic material are provided 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 attached is slotted on the outside on one side to such an extent that the sealing membrane welded to the pipe does not hinder the connection process when attached.
Bei den bekannten Verbindungselementen sitzt das äußere, geschlitze Rohr mit relativ großem Spiel auf dem inneren geschlossenen Rohr. Zugleich hat zwangsläufig der Schlitz im äußeren Rohr großes Spiel, damit die angeschweißte Abdichtungsbahn nicht von den scharfen Rohrkanten durchtrennt wird, wenn das äußere Rohr auf das innere Rohr geschoben wird bzw. umgekehrt das innere Rohr in das äußere geschoben wird. Bei derartigen Verbindungselementen ist zwangsläufig eine erhebliche Undichtigkeiten durch das vorhandene Spiel gegeben.In the known connecting elements, the outer, slotted tube sits with a relatively large amount of play on the inner closed tube. At the same time, the slot in the outer tube inevitably has a lot of play, so that the welded sealing membrane is not cut through by the sharp tube edges when the outer tube is pushed onto the inner tube or, conversely, the inner tube is pushed into the outer one. With such connecting elements, there is inevitably a considerable amount of leakage due to the existing game.
Der Erfindung liegt die Aufgabe zugrunde, die bekannten Verbindungselemente zu verbessern. Nach der Erfindung wird das dadurch erreicht, daß das äußere Rohr an der Innenseite Rillen oder Nuten aufweist und das innere Rohr mit in die Nuten passenden Stegen versehen ist. Die in die Nuten gleitenden Stege bilden eine Dichtung.The object of the invention is to improve the known connecting elements. According to the invention this is achieved in that the outer tube has grooves or grooves on the inside and the inner tube is provided with webs which fit into the grooves. The webs sliding into the grooves form a seal.
In der Zeichnung sind zwei Ausführungsbeispiele der Erfindung dargestellt.Two exemplary embodiments of the invention are shown in the drawing.
Mit 1 sind in Fig. 1 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 vorgesehehen 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.1 in Fig. 1 different geomembrane elements are designated. 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 without any noteworthy Workload possible. 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 erfogt 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 Dichtungsbahnelemente 1 mit dem aufgespritzten Ortbeton bilden, bis dieser abgebunden ist.To assemble the sealing membrane elements 1, these are either erected individually or up to a partial length or the entire length with tubes 2 and 4 inserted into one another. The installation takes place 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 is set.
Wahlweise lassen sich die Abdichtungsbahnen auch unten mit einer Stahlschiene beschweren, die die Abdichtungsbahnen zum Einsinken bringen.Optionally, the waterproofing membrane can also be weighted down with a steel rail, which causes the waterproofing membrane to sink in.
Im Ausführungsbeispiel hat die Abdichtungsbahn 1 unter Berücksichtigung der Noppen eine Dicke von 4 mm 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.
Nach Fig. 2 haben die Dichtungsbahnelemente 1 eine Länge von 0,5 bis 2 m und sind seitlich anstelle der Rohre 2 mit angeschweißten Rohren 6 und anstelle der Rohre 4 mit angeschweißtem Vollmaterial 8 versehen. Die Rohre 6 besitzen innen Rillen oder Nuten 7.2, the sealing membrane elements 1 have a length of 0.5 to 2 m and are provided laterally instead of the tubes 2 with welded
Passend zu diesen Nuten ist das andere Vollmaterial 8 mit aufgesetzten Stegen 9 versehen, so daß das Material 8 mit diesen Stegen 9 in die Nuten 7 des Nachbarrohres 6 eingeführt werden kann und darin abwärts gleitet. Ein solches Nut-Federsystem gewährleistet die Dichtung der Rohrverbindungen und dient gleichzeitig der Aussteifung der Elemente untereinander. Die Durchmesser der beiden ineinandergesteckten Teile sind so aufeinander abzustimmen, daß das innenliegende Material 8 eine Art Keilwirkung auf das äußere Rohr 6 ausübt und die aufgesetzten Keile fest in die Nut eingepreßt werden. Auf diese Weise wird eine Labyrinthdichtung bewirkt.Matching these grooves, the other
Vorzugsweise bestehen das äußere Rohr 6 und das Vollmaterial 8 aus Polyethylen. Das Polyethylen entwickelt bei höheren Drücken eine höhere Gleitwirkung. Das ist der erfindungsgemäßen Preßpassung zwischen dem Rohr 6 und dem Vollmaterial 8 ausgesprochen förderlich.The
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT85114254T ATE38066T1 (en) | 1985-02-07 | 1985-11-08 | DAP WALLS WITH SEALING MEMBRANES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853504119 DE3504119A1 (en) | 1985-02-07 | 1985-02-07 | SLOT WALLS WITH SEALING SHEETS |
| DE3504119 | 1985-02-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0190409A1 EP0190409A1 (en) | 1986-08-13 |
| EP0190409B1 true EP0190409B1 (en) | 1988-10-19 |
Family
ID=6261877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85114254A Expired EP0190409B1 (en) | 1985-02-07 | 1985-11-08 | Underground walls with impermeable sheets |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0190409B1 (en) |
| AT (1) | ATE38066T1 (en) |
| DE (2) | DE3504119A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4418629A1 (en) * | 1994-05-27 | 1995-11-30 | Sued Chemie Ag | Process for the production of sealing walls |
| CN102505701B (en) * | 2011-09-28 | 2014-01-29 | 中国水利水电第七工程局成都水电建设工程有限公司 | Self-compaction mortar and deep hole curtain pouring construction method |
| CN112922353B (en) * | 2021-02-01 | 2022-04-12 | 中建八局第三建设有限公司 | Construction method for forward and reverse combination of steel structure frame outer curtain wall |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR916315A (en) * | 1945-06-12 | 1946-12-03 | Improvements made to sheet piles | |
| NL7102851A (en) * | 1971-03-03 | 1972-09-05 | ||
| NL8200466A (en) * | 1982-02-08 | 1983-09-01 | Stevin Volker Beton Water | METHOD FOR MANUFACTURING A DISPLAY CONTAINING THE FLOW OF GROUNDWATER |
| NL8300596A (en) * | 1983-02-17 | 1984-09-17 | Stork Kst B V | Clean and or contaminated soil partition wall - has plastics panel with interlocking edges and cavity filled with foam |
| US4601615A (en) * | 1983-02-22 | 1986-07-22 | Finic, B.V. | Environmental cut-off for deep excavations |
| US4519729A (en) * | 1983-05-10 | 1985-05-28 | Schlegel Corporation | Segmented membrane barrier |
-
1985
- 1985-02-07 DE DE19853504119 patent/DE3504119A1/en not_active Withdrawn
- 1985-11-08 DE DE8585114254T patent/DE3565700D1/en not_active Expired
- 1985-11-08 AT AT85114254T patent/ATE38066T1/en not_active IP Right Cessation
- 1985-11-08 EP EP85114254A patent/EP0190409B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3565700D1 (en) | 1988-11-24 |
| ATE38066T1 (en) | 1988-11-15 |
| DE3504119A1 (en) | 1986-08-07 |
| EP0190409A1 (en) | 1986-08-13 |
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