EP0667417A1 - Method for sealing an impervious barrier in soil - Google Patents

Method for sealing an impervious barrier in soil Download PDF

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Publication number
EP0667417A1
EP0667417A1 EP94890034A EP94890034A EP0667417A1 EP 0667417 A1 EP0667417 A1 EP 0667417A1 EP 94890034 A EP94890034 A EP 94890034A EP 94890034 A EP94890034 A EP 94890034A EP 0667417 A1 EP0667417 A1 EP 0667417A1
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EP
European Patent Office
Prior art keywords
sections
sealing
diaphragm wall
reinforcement cages
wall
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EP94890034A
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German (de)
French (fr)
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EP0667417B1 (en
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Rudolf G. Hofinger
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Priority to DE59402603T priority Critical patent/DE59402603D1/en
Priority to EP94890034A priority patent/EP0667417B1/en
Priority to AT94890034T priority patent/ATE152497T1/en
Priority to DK94890034.5T priority patent/DK0667417T3/en
Publication of EP0667417A1 publication Critical patent/EP0667417A1/en
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    • 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
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • 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 present invention relates to a method for sealing the construction joints existing between the individual sections of a diaphragm wall by means of a sealing material which is introduced into the sections of the slot produced in the floor by means of reinforcement cages and after the production of two adjacent sections of the diaphragm wall in the areas of there are construction joints between these sections.
  • a bentonite suspension is introduced into these sections, which serves as a support.
  • reinforcement cages are used in these sections.
  • underwater concrete is introduced into these sections by means of at least one tube immersed in the bentonite suspension and the bentonite suspension displaced thereby is pumped off at the top.
  • the individual sections which are located at approximately equal distances from one another, are produced in succession. As soon as the concrete in the relevant wall section has hardened, the formwork tubes that delimit its ends are pulled out of the ground.
  • the object of the present invention is therefore to provide a method by which a simple and effective sealing of the construction joints formed between the individual sections of a diaphragm wall and, if appropriate, the outside of the diaphragm wall is ensured.
  • This is achieved according to the invention in that the reinforcement cages are at least partially provided in the areas of their two end walls and one side wall with sealing mats which, after the two adjacent sections of the diaphragm wall have been produced, lie along the construction joints between the sections of the diaphragm wall and preferably also on the outside along the sections extend the diaphragm wall.
  • the sealing mats preferably extend over the entire end faces of the reinforcement cages.
  • the sealing mats can also extend over the entire outside of the reinforcement cages.
  • the sealing mats are double-layered in a manner known per se, a bentonite filling being located between the two layers.
  • first slot sections 11 are dredged, into which a bentonite suspension is introduced, as a result of which these slot sections 11 are supported.
  • the two ends of these sections 11 are then delimited by formwork tubes 12 and 13 and reinforcement cages 14 are introduced into these sections 11.
  • Sections 20, which still contain the soil, are located between two sections 11 of the primary slot which are at a distance from one another.
  • the reinforcement cages 14 are equipped with sealing mats 15 on those sides which are assigned to the outside of the diaphragm wall which is to be erected, and which extend into the region of the end walls of the reinforcement cages 14 extend.
  • the sealing mats 25 extend over the outer sides and over the end walls of the reinforcement cages 24, whereby a sealing of the sealing mats through the outer portions of the sealing mats 25, which are pressed against the outer wall of the slot Trench wall is effected, and the necessary sealing of the construction joints is effected by the parts located on the end walls of the reinforcement cages 24 which enter the construction joints which form between the primary sections and the secondary sections of the trench wall.
  • two-layer mats are preferably used, one layer being made of polypropylene and the other layer being made of a non-woven fabric, and powdered bentonite being located between these two layers.
  • the two layers are connected to one another point-wise over their entire surface. This can be done, for example, by needling.
  • sealing effect of these sealing mats 15, 25, 25a is achieved in that the bentonite contained in the sealing mat 15, 25, 25a swells when moisture penetrates, as a result of which the construction joint located between two sections 18, 28 of the diaphragm wall prevents the passage of moisture is completely closed.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Package Closures (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Revetment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The reinforcement baskets (24) are provided at least partly in the areas of their two face walls and one side wall with sealing mats (15,25), which extend after prodn. of the two adjacent sections (18,28) of the slot wall along the work seams between the sections of the slot wall and pref. also outside along the sections of the slot wall. The sealing mats extend over the complete face surfaces of the reinforcement baskets. They are doubly coated, with a bentonite filling between the two coats.

Description

Die gegenständliche Erfindung betrifft ein Verfahren zur Abdichtung der zwischen den einzelnen Abschnitten einer Schlitzwand bestehenden Arbeitsfugen mittels eines Dichtungsmaterials, welches mittels Bewehrungskörben in die im Boden hergestellten Abschnitte des Schlitzes eingebracht wird und sich nach der Herstellung von zwei nebeneinander befindlichen Abschnitten der Schlitzwand in den Bereichen der sich zwischen diesen Abschnitten ausbildenden Arbeitsfugen befindet.The present invention relates to a method for sealing the construction joints existing between the individual sections of a diaphragm wall by means of a sealing material which is introduced into the sections of the slot produced in the floor by means of reinforcement cages and after the production of two adjacent sections of the diaphragm wall in the areas of there are construction joints between these sections.

Bei der Errichtung von Wänden nach dem sogenannten Schlitzwandverfahren werden in derjenigen Linie, längs welcher die Schlitzwand errichtet werden soll, im Abstand voneinander befindliche Leitwände, nämlich parallele Wände, welche sich oberhalb der zu errichtenden Schlitzwand befinden, hergestellt. In der Folge werden zwischen diesen Leitwänden erste Abschnitte des Schlitzes, nämlich Abschnitte eines sog. Primärschlitzes, ausgebaggert, deren Längen der mehrfachen Arbeitslänge der Baggerschaufel entsprechen. Sobald ein erster Abschnitt die erforderliche Tiefe aufweist, wird dieser an seinen beiden Enden dadurch begrenzt, daß in diesen Rohre, sog. Schalrohre, eingetrieben werden. Beispielsweise beträgt die Länge der Abschnitte des Primärschlitzes 6 m, ihre Breite 60 cm bis 120 cm und ihre Tiefe bis 50 m.When walls are erected according to the so-called diaphragm wall method, in the line along which the diaphragm wall is to be built, guide walls located at a distance from one another, namely parallel walls, which are located above the diaphragm wall to be erected, are produced. Subsequently, first sections of the slot, namely sections of a so-called primary slot, are dredged between these guide walls, the lengths of which correspond to the multiple working length of the excavator bucket. As soon as a first section has the required depth, it is limited at both ends by driving tubes, so-called formwork tubes, into these. For example, the length of the sections of the primary slot is 6 m, their width is 60 cm to 120 cm and their depth is up to 50 m.

Während des Aushubes des Erdreiches wird in diese Abschnitte eine Bentonitsuspension eingebracht, welche zur Abstützung dient. In der Folge werden in diese Abschntite Bewehrungskörbe eingesetzt. Hierauf wird in diese Abschnitte mittels mindestens eines in die Bentonitsuspension eintauchenden Rohres Unterwasserbeton eingebracht und wird die hierdurch verdrängte Bentonitsuspension an der Oberseite abgepumpt. Die Herstellung der einzelnen, in etwa gleichen Abständen voneinander befindlichen Abschnitte erfolgt aufeinanderfolgend. Sobald der Beton im betreffenden Wandabschnitt erhärtet ist, werden die seine Enden begrenzenden Schalrohre aus dem Erdreich herausgezogen.During the excavation of the soil, a bentonite suspension is introduced into these sections, which serves as a support. As a result, reinforcement cages are used in these sections. Subsequently, underwater concrete is introduced into these sections by means of at least one tube immersed in the bentonite suspension and the bentonite suspension displaced thereby is pumped off at the top. The individual sections, which are located at approximately equal distances from one another, are produced in succession. As soon as the concrete in the relevant wall section has hardened, the formwork tubes that delimit its ends are pulled out of the ground.

Hierauf wird das zwischen diesen primären Abschnitten der Schlitzwand befindliche Material ausgebaggert, wodurch Abschnitte des sogenannten Sekundärschlitzes hergestellt werden, welche gleichfalls durch eine Bentonitsuspension abgestützt werden, werden weiters in die zwischen den primären Abschnitten der Schlitzwand befindlichen sekundären Abschnitte des Schlitzes Bewehrungskörbe eingesetzt und wird auch in diese sekundären Abschnitte des Schlitzes Beton eingebracht. Hierdurch wird eine durchgehende Schlitzwand hergestellt.Then the material located between these primary sections of the diaphragm wall is dredged, whereby sections of the so-called secondary slot are produced, which are also supported by a bentonite suspension, are further inserted into the secondary sections of the slot located between the primary sections of the diaphragm wall and are also used in these secondary sections of the slot are brought in concrete. This creates a continuous diaphragm wall.

Bei der Herstellung derartiger Schlitzwände tritt allerdings das Problem auf, daß sich zwischen den primären Abschnitten und den sekundären Abschnitten der Schlitzwand Arbeitsfugen ausbilden, welche abgedichtet werden müssen. Der Grund hierfür liegt einerseits darin, daß sich die nebeneinander liegenden primären und sekundären Abschnitte der Schlitzwand miteinander nicht hinreichend verbinden, wodurch sich durch thermisch bedingte Bewegungen bzw. durch den Gebirgsdruck zwischen den Betonkörpern Fugen ausbilden können, welche für Flüssigkeiten durchlässig sind. Andererseits kann die mangelnde Abdichtung auch dadurch verursacht werden, daß im Bereich der Arbeitsfugen Fremdkörper, wie Steine oder Einschlüsse, verbleiben. Soferne durch Arbeitsfugen Flüssigkeit hindurchtritt, werden die Arbeitsfugen mehr und mehr ausgespült.When producing such diaphragm walls, however, the problem arises that working joints form between the primary sections and the secondary sections of the diaphragm wall, which must be sealed. The reason for this is, on the one hand, that the adjacent primary and secondary sections of the diaphragm wall do not adequately connect with one another, as a result of which movements which are permeable to liquids can form between the concrete bodies as a result of thermal movements or due to the rock pressure. On the other hand, the lack of sealing can also be caused by foreign bodies such as stones or inclusions remaining in the area of the construction joints. As soon as liquid passes through construction joints, the construction joints are rinsed out more and more.

Zudem besteht oftmals auch das Erfordernis, die Schlitzwand selbst abzudichten. Der Grund hierfür liegt darin, daß an sich wasserdichter Beton gegenüber aggressiven Medien nicht bestandfähig ist, weswegen das Erfordernis bestehen kann, den Zutritt von aggressiven Flüssigkeiten zu verhindern.In addition, there is often also the need to seal the diaphragm wall itself. The reason for this is that waterproof concrete as such cannot withstand aggressive media, which is why there may be a need to prevent the entry of aggressive liquids.

Die Abdichtung der Arbeitsfugen bzw. die Abdichtung der Schlitzwand gegenüber aggressiven Medien könnte nach dem Aushub des innerhalb der Schlitzwände befindlichen Materials dadurch erzielt werden, daß deren Innenseite abgedichtet wird. Da jedoch die Flüssigkeit an der Außenseite der Schlitzwände auftritt, kann hiedurch niemals eine vollständige Abdichtung gewährleistet werden. Eine vollständige Abdichtung könnte vielmehr nur dadurch erzielt werden, daß die Außenseite der Schlitzwand freigelegt und mit einer Dichtung versehen wird. Diese Vorgangsweise wäre jedoch so aufwendig, daß sie wirtschaftlich nicht vertretbar ist.The sealing of the construction joints or the sealing of the diaphragm wall against aggressive media could be achieved after excavating the material located within the diaphragm walls by sealing the inside thereof. However, since the liquid appears on the outside of the diaphragm walls, a complete seal can never be guaranteed. A complete seal could only be achieved by exposing the outside of the diaphragm wall and providing it with a seal. However, this procedure would be so complex that it is not economically justifiable.

Aus der DE-OS 1 484 534 ist ein Verfahren zum Abdichten der Fugen einer Schlitzwand bekannt, welches darin besteht, daß mit den Bewehrungskörben in die Abschnitte des Schlitzes Dichtungsleisten eingebracht werden. Da sich jedoch diese Dichtungsleisten quer zur Arbeitsfuge erstrecken, wodurch sich um die Dichtungsleisten herum eine Flüssigkeitsströmung ausbilden kann, wird durch diese eine nur sehr wenig wirksame Abdichtung bewirkt.From DE-OS 1 484 534 a method for sealing the joints of a diaphragm wall is known, which consists in that sealing strips are introduced into the sections of the slot with the reinforcement cages. However, since these sealing strips extend transversely to the construction joint, as a result of which a liquid flow can form around the sealing strips, an only very ineffective seal is brought about by them.

Der gegenständlichen Erfindung liegt demnach die Aufgabe zugrunde, ein Verfahren zu schaffen, durch welches eine einfache und wirkungsvolle Abdichtung der sich zwischen den einzelnen Abschnitten einer Schlitzwand ausbildenden Arbeitsfugen und gegebenenfalls der Außenseite der Schlitzwand gewährleistet wird. Dies wird erfindungsgemäß dadurch erzielt, daß die Bewehrungskörbe zumindest teilweise in den Bereichen ihrer beiden Stirnwände und einer Seitenwand mit Dichtungsmatten versehen werden, welche sich nach Herstellung der beiden aneinanderliegenden Abschnitte der Schlitzwand längs der Arbeitsfugen zwischen den Abschnitten der Schlitzwand und vorzugsweise auch außenseitig längs der Abschnitte der Schlitzwand erstrecken.The object of the present invention is therefore to provide a method by which a simple and effective sealing of the construction joints formed between the individual sections of a diaphragm wall and, if appropriate, the outside of the diaphragm wall is ensured. This is achieved according to the invention in that the reinforcement cages are at least partially provided in the areas of their two end walls and one side wall with sealing mats which, after the two adjacent sections of the diaphragm wall have been produced, lie along the construction joints between the sections of the diaphragm wall and preferably also on the outside along the sections extend the diaphragm wall.

Vorzugsweise erstrecken sich die Dichtungsmatten, wie an sich bekannt, über die gesamten Stirnflächen der Bewehrungskörbe. Zudem können sich die Dichtungsmatten auch über die gesamten Außenseiten der Bewehrungskörbe erstrecken.As is known per se, the sealing mats preferably extend over the entire end faces of the reinforcement cages. In addition, the sealing mats can also extend over the entire outside of the reinforcement cages.

Nach einem bevorzugten Ausführungsbeispiel sind die Dichtungsmatten in an sich bekannter Weise doppelschichtig ausgebildet, wobei sich zwischen den beiden Schichten eine Bentonitfüllung befindet.According to a preferred embodiment, the sealing mats are double-layered in a manner known per se, a bentonite filling being located between the two layers.

Das erfindungsgemäße Verfahren ist nachstehend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigen:

  • Die Fig. 1a, 1 und 1 c
  • aufeinanderfolgende Schritte der Herstellung von primären Abschnitten einer Wand nach dem Schlitzwandverfahren, in Vorderansicht,
  • die Fig. 2a, 2b und 2c
  • diese Verfahrensschritte in Draufsicht,
  • Fig. 3a
  • eine Seitenansicht des Verfahrensschrittes gemäß Fig. 1 a,
  • die Fig. 4a, 4b und 4c
  • aufeinanderfolgende Schritte der Herstellung von sekundären Abschnitten dieser Schlitzwand, und
  • die Fig. 5a, 5b und 5c
  • diese Schritte, in Draufsicht.
The method according to the invention is explained in more detail below with reference to exemplary embodiments shown in the drawing. Show it:
  • 1a, 1 and 1 c
  • successive steps of the production of primary sections of a wall according to the diaphragm wall process, in front view,
  • 2a, 2b and 2c
  • these process steps in top view,
  • Fig. 3a
  • 2 shows a side view of the method step according to FIG. 1 a,
  • 4a, 4b and 4c
  • successive steps of manufacturing secondary sections of this diaphragm wall, and
  • 5a, 5b and 5c
  • these steps, top view.

Wie dies in den Fig. 1 bis 3 dargestellt ist, werden zur Herstellung eines primären Abschnittes der Schlitzwand zwischen zwei Leitwänden 1 erste Schlitzabschnitte 11 ausgebaggert, in welche eine Bentonitsuspension eingebracht wird, wodurch diese Schlitzabschnitte 11 abgestützt werden. Hierauf werden die beiden Enden dieser Abschnitte 11 durch Schalrohre 12 und 13 begrenzt und werden in diese Abschnitte 11 Bewehrungskörbe 14 eingebracht. Zwischen zwei voneinander im Abstand befindlichen Abschnitten 11 des Primärschlitzes befinden sich Abschnitte 20, welche noch das Erdreich enthalten.As shown in FIGS. 1 to 3, to produce a primary section of the diaphragm wall between two guide walls 1, first slot sections 11 are dredged, into which a bentonite suspension is introduced, as a result of which these slot sections 11 are supported. The two ends of these sections 11 are then delimited by formwork tubes 12 and 13 and reinforcement cages 14 are introduced into these sections 11. Sections 20, which still contain the soil, are located between two sections 11 of the primary slot which are at a distance from one another.

Wie dies insbesondere aus den Fig. 2a und 2b ersichtlich ist, sind die Bewehrungskörbe 14 an denjenigen Seiten, welche der Außenseite der Schlitzwand, welche errichtet werden soll, zugeordnet sind, mit Dichtungsmatten 15 bestückt, welche sich bis in den Bereich der Stirnwände der Bewehrungskörbe 14 erstrecken.As can be seen in particular from FIGS. 2a and 2b, the reinforcement cages 14 are equipped with sealing mats 15 on those sides which are assigned to the outside of the diaphragm wall which is to be erected, and which extend into the region of the end walls of the reinforcement cages 14 extend.

Während des Aushubes des Erdreiches zur Herstellung der Abschnitte 11 des Primärschlitzes werden diese durch Einbringen einer Bentonitsuspension abgestützt. Nach dem vollständigen Aushub dieser Abschnitte 11 des Primärschlitzes wird in diese durch in die Bentonitsuspension eintauchende Förderrohre 16 Unterwasserbeton 17 eingebracht und wird gleichzeitig die hierdurch verdrängte Bentonitsuspension an der Oberseite abgepumpt. Durch das Einbringen des Unterwasserbetons 17 werden die Dichtungsmatten 15 an die Außenwand des Schlitzes gepreßt, wie dies in Fig. 2c dargestellt ist.During the excavation of the soil to produce the sections 11 of the primary slot, these are supported by introducing a bentonite suspension. After these sections 11 of the primary slot have been completely excavated, underwater concrete 17 is introduced into them by conveying pipes 16 immersed in the bentonite suspension, and at the same time the bentonite suspension displaced thereby is pumped off at the top. By inserting the underwater concrete 17, the sealing mats 15 are pressed against the outer wall of the slot, as shown in Fig. 2c.

Sobald der Unterwasserbeton 17 hinreichend erhärtet ist, wodurch primäre Abschnitte 18 der Schlitzwand hergestellt wurden, werden die Schalrohre 12 und 13 herausgezogen und werden, wie dies in den Fig. 4a bis 4c und in den Fig. 5a bis 5c dargestellt ist, dadurch die sekundären Abschnitte 28 der Schlitzwand hergestellt, daß das sich zwischen den primären Abschnitten 18 befindliche Erdreich ausgebaggert wird, in die sekundären Abschnitte 21 des Schlitzes Stützflüssigkeit eingebracht wird, in diese Abschnitte 21 gleichfalls mit Dichtungsmatten 25 bestückte Bewehrungskörbe 24 abgesenkt werden und in der Folge mittels Förderrohren 16 auch in diese Abschnitte 21 Unterwasserbeton 17 eingebracht wird, wodurch die sekundären Abschnitte 28 der Schlitzwand hergestellt werden.As soon as the underwater concrete 17 has hardened sufficiently, whereby primary sections 18 of the diaphragm wall have been produced, the formwork tubes 12 and 13 are pulled out and, as shown in FIGS. 4a to 4c and in FIGS. 5a to 5c, thereby become the secondary ones Sections 28 of the diaphragm wall are produced such that the soil located between the primary sections 18 is dredged, supporting liquid is introduced into the secondary sections 21 of the slot, reinforcement cages 24 equipped with sealing mats 25 are also lowered into these sections 21 and subsequently by means of conveyor pipes 16 underwater concrete 17 is also introduced into these sections 21, as a result of which the secondary sections 28 of the diaphragm wall are produced.

Wie dies aus den Fig. 5a bis 5c ersichtlich ist, erstrecken sich die Dichtungsmatten 25 über die Außenseiten und über die Stirnwände der Bewehrungskörbe 24, wobei durch die außen liegenden Abschnitte der Dichtungsmatten 25, welche an die Außenwand des Schlitzes gepreßt werden, eine Abdichtung der Schlitzwand bewirkt wird, und durch die an den Stirnwänden der Bewehrungskörbe 24 befindlichen Teile, welche in die Arbeitsfugen, welche sich zwischen den primären Abschnitten und den sekundären Abschnitten der Schlitzwand ausbilden, gelangen, die erforderliche Abdichtung der Arbeitsfugen bewirkt wird.As can be seen from FIGS. 5a to 5c, the sealing mats 25 extend over the outer sides and over the end walls of the reinforcement cages 24, whereby a sealing of the sealing mats through the outer portions of the sealing mats 25, which are pressed against the outer wall of the slot Trench wall is effected, and the necessary sealing of the construction joints is effected by the parts located on the end walls of the reinforcement cages 24 which enter the construction joints which form between the primary sections and the secondary sections of the trench wall.

Als Dichtungsmatten 15, 25, 25a werden vorzugsweise zweischichtig ausgebildete Matten verwendet, wobei die eine Schichte aus Polypropylen und die andere Schichte aus einem Faservlies gefertigt ist und sich zwischen diesen beiden Schichten pulverförmiges Bentonit befindet. Um zu gewährleisten, daß die Bentonitfüllung auch bei senkrechter Lage der Dichtungsmatte 15, 25, 25a gleichmäßig über die Fläche verteilt bleibt, sind die beiden Schichten über ihre gesamte Fläche miteinander punktförmig verbunden. Dies kann beispielsweise durch Vernadelung bewirkt werden.As a sealing mat 15, 25, 25a, two-layer mats are preferably used, one layer being made of polypropylene and the other layer being made of a non-woven fabric, and powdered bentonite being located between these two layers. In order to ensure that the bentonite filling remains evenly distributed over the surface even when the sealing mat 15, 25, 25a is in a vertical position, the two layers are connected to one another point-wise over their entire surface. This can be done, for example, by needling.

Die abdichtende Wirkung dieser Dichtungsmatten 15, 25, 25a wird dadurch erzielt, daß das in der Dichtungsmatte 15, 25, 25a enthaltene Bentonit bei Eindringen der Feuchtigkeit aufquillt, wodurch die zwischen jeweils zwei Abschnitten 18, 28 der Schlitzwand befindliche Arbeitsfuge gegenüber dem Durchtritt von Feuchtigkeit vollständig verschlossen wird.The sealing effect of these sealing mats 15, 25, 25a is achieved in that the bentonite contained in the sealing mat 15, 25, 25a swells when moisture penetrates, as a result of which the construction joint located between two sections 18, 28 of the diaphragm wall prevents the passage of moisture is completely closed.

Claims (4)

1. Verfahren zur Abdichtung der zwischen den einzelnen Abschnitten einer Schlitzwand bestehenden Arbeitsfugen mittels eines Dichtungsmaterials, welches mittels Bewehrungskörben in die im Boden hergestellten Abschnitte des Schlitzes eingebracht wird und sich nach der Herstellung von zwei nebeneinander befindlichen Abschnitten der Schlitzwand in den Bereichen der sich zwischen diesen Abschnitten ausbildenden Arbeitsfugen befindet, dadurch gekennzeichnet, daß die Bewehrungskörbe (14, 24) zumindest teilweise in den Bereichen ihrer beiden Stirnwände und einer Seitenwand mit Dichtungsmatten (15, 25, 25a) versehen werden, welche sich nach Herstellung der beiden aneinanderliegenden Abschnitte (18, 28) der Schlitzwand längs der Arbeitsfugen zwischen den Abschnitten (18, 28) der Schlitzwand und vorzugsweise auch außenseitig längs der Abschnitte (18, 28) der Schlitzwand erstrecken.1. Method for sealing the construction joints existing between the individual sections of a diaphragm wall by means of a sealing material which is introduced into the sections of the slot produced in the floor by means of reinforcement cages and after the production of two adjacent sections of the diaphragm wall in the areas of between them Construction joints forming sections, characterized in that the reinforcement cages (14, 24) are at least partially provided in the areas of their two end walls and one side wall with sealing mats (15, 25, 25a) which are produced after the two sections (18, 28) of the diaphragm wall along the construction joints between the sections (18, 28) of the diaphragm wall and preferably also on the outside along the sections (18, 28) of the diaphragm wall. 2. Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, daß sich die Dichtungsmatten (25), wie an sich bekannt, über die gesamten Stirnflächen der Bewehrungskörbe (24) erstrecken (Fig. 5a bis 5c).2. The method according to claim 1, characterized in that the sealing mats (25), as known per se, extend over the entire end faces of the reinforcement cages (24) (Fig. 5a to 5c). 3. Verfahren nach einem der Patentansprüche 1 und 2, dadurch gekennzeichnet, daß sich die Dichtungsmatten (25A) über die gesamte Außenseite der Bewehrungskörbe (24) erstrekken.3. The method according to any one of claims 1 and 2, characterized in that the sealing mats (25A) over the entire outside of the reinforcement cages (24). 4. Verfahren nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, daß die Dichtungsmatten (15, 25, 25a) in an sich bekannter Weise doppelschichtig ausgebildet sind, wobei sich zwischen den beiden Schichten eine Bentonitfüllung befindet.4. The method according to any one of claims 1 to 3, characterized in that the sealing mats (15, 25, 25a) are double-layered in a manner known per se, with a bentonite filling between the two layers.
EP94890034A 1994-02-08 1994-02-08 Method for sealing an impervious barrier in soil Expired - Lifetime EP0667417B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59402603T DE59402603D1 (en) 1994-02-08 1994-02-08 Process for sealing diaphragm walls
EP94890034A EP0667417B1 (en) 1994-02-08 1994-02-08 Method for sealing an impervious barrier in soil
AT94890034T ATE152497T1 (en) 1994-02-08 1994-02-08 METHOD FOR SEALING SLIT WALLS
DK94890034.5T DK0667417T3 (en) 1994-02-08 1994-02-08 Method for sealing slit walls.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94890034A EP0667417B1 (en) 1994-02-08 1994-02-08 Method for sealing an impervious barrier in soil

Publications (2)

Publication Number Publication Date
EP0667417A1 true EP0667417A1 (en) 1995-08-16
EP0667417B1 EP0667417B1 (en) 1997-05-02

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EP94890034A Expired - Lifetime EP0667417B1 (en) 1994-02-08 1994-02-08 Method for sealing an impervious barrier in soil

Country Status (4)

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EP (1) EP0667417B1 (en)
AT (1) ATE152497T1 (en)
DE (1) DE59402603D1 (en)
DK (1) DK0667417T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2771427A1 (en) * 1997-11-21 1999-05-28 Sol Comp Du ANTI-FRICTION DEVICE FOR AN UNDERGROUND STRUCTURE
BE1017368A5 (en) * 2006-11-22 2008-07-01 Olivier Ind Nv Process for forming a retaining wall and a retaining wall formed in accordance with such a process.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103522A (en) * 1966-01-21 1968-02-14 Gino Wey Method of producing a continuous wall of piles
GB2136861A (en) * 1983-03-18 1984-09-26 Intrafor Cofor Process for the construction of insulated sites in particular for the discharge of polluant products or the formation of impervious barricades or barriers, and works thereby constructed
EP0278419A2 (en) * 1987-02-13 1988-08-17 NAUE-FASERTECHNIK GMBH & CO. KG Waterproof sealing mat, essentially composed of a supporting layer, and intermediate layer of expandable clay, and a covering layer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103522A (en) * 1966-01-21 1968-02-14 Gino Wey Method of producing a continuous wall of piles
GB2136861A (en) * 1983-03-18 1984-09-26 Intrafor Cofor Process for the construction of insulated sites in particular for the discharge of polluant products or the formation of impervious barricades or barriers, and works thereby constructed
EP0278419A2 (en) * 1987-02-13 1988-08-17 NAUE-FASERTECHNIK GMBH & CO. KG Waterproof sealing mat, essentially composed of a supporting layer, and intermediate layer of expandable clay, and a covering layer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2771427A1 (en) * 1997-11-21 1999-05-28 Sol Comp Du ANTI-FRICTION DEVICE FOR AN UNDERGROUND STRUCTURE
GB2331533B (en) * 1997-11-21 2002-03-27 Cie Du Sol An antifriction assembly and method of making a cast wall fitted with the assembly
BE1017368A5 (en) * 2006-11-22 2008-07-01 Olivier Ind Nv Process for forming a retaining wall and a retaining wall formed in accordance with such a process.

Also Published As

Publication number Publication date
EP0667417B1 (en) 1997-05-02
DE59402603D1 (en) 1997-06-05
ATE152497T1 (en) 1997-05-15
DK0667417T3 (en) 1997-11-03

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