EP0391127B1 - Device for placing a sealing-membrane in a slot in the earth filled with suspension - Google Patents

Device for placing a sealing-membrane in a slot in the earth filled with suspension Download PDF

Info

Publication number
EP0391127B1
EP0391127B1 EP90105259A EP90105259A EP0391127B1 EP 0391127 B1 EP0391127 B1 EP 0391127B1 EP 90105259 A EP90105259 A EP 90105259A EP 90105259 A EP90105259 A EP 90105259A EP 0391127 B1 EP0391127 B1 EP 0391127B1
Authority
EP
European Patent Office
Prior art keywords
guide rails
membrane
rails
slot
spacer
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.)
Expired - Lifetime
Application number
EP90105259A
Other languages
German (de)
French (fr)
Other versions
EP0391127A1 (en
Inventor
Günther Dipl-Ing. Körber
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.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau 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 Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to AT90105259T priority Critical patent/ATE82606T1/en
Publication of EP0391127A1 publication Critical patent/EP0391127A1/en
Application granted granted Critical
Publication of EP0391127B1 publication Critical patent/EP0391127B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/06Restraining of underground water
    • E02D19/12Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/18Restraining 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 invention relates to a device for introducing a sealing membrane into a suspension-filled earth slot, wherein membrane sheets are successively attached laterally and connected to one another at the attachment point, according to the preamble of claim 1.
  • Such devices are used in civil engineering for the production of sealed, vertical diaphragm walls, which usually consist of a suspension of water, cement, clay or bentonite and other additives. They serve as a barrier in the ground.
  • the sealing membranes made of stainless steel or plastic are integrated for complete and reliable sealing. As the construction progresses, individual membrane sheets must be continuously attached to one another and connected to one another.
  • the rails each consist of two opposite half-shells, which are arranged in such a way that the vertical edges of the shells each form a first and a second guide gap for two foils to be attached to one another.
  • Two guides are used alternately at the respective attachment point or at the free edge of the next membrane sheet to be drawn in, with one guide remaining in its position unchanged in two successive pulling-in processes and the other guide being laterally offset by the width of the two membrane sheets in question.
  • the guides are not arranged absolutely parallel and vertically, considerable friction in the film locks is inevitable.
  • a generic device is known from DE-OS 37 27 202.
  • Hollow bodies spaced apart from one another and lowered into a suspension-filled earth slot have longitudinal slots for guiding the vertical edges of a membrane web to be inserted into the bottom slot.
  • the side edges of the membrane web are gripped by insertion tools and pulled downwards by them.
  • the invention has for its object to provide a device of the type mentioned, with which the membrane sheets to be connected can be retracted precisely into the earth slot filled with suspension with little design effort and little space.
  • the invention has the advantage that tearing of the membrane sheets is reliably prevented. Furthermore, the guide rails, for example designed as a hollow body, can be quickly and easily adapted to different diaphragm wall depths.
  • Tilting of locks or the retracting devices used is prevented by at least one of the two hollow bodies used as guide rails is swinging. This measure simplifies the necessary alignment of the hollow bodies or guide rails used on the one hand in an absolutely vertical position and on the other hand at an equal distance over the entire length. The parallel alignment can take place automatically if the weight-loaded spacer, which is guided on two adjacent hollow bodies, is used.
  • the self-aligning bearing is arranged to be longitudinally displaceable on the membrane guide rail in question, it can be easily adapted to different slot depths and / or to the position of the guide wall in question.
  • a particularly expedient and simple embodiment of the self-aligning bearing consists in the fact that it consists of two pins which are arranged on the opposite sides of the membrane guide rail or on the outer sides of the two half-shells if the guide rail consists of two half-shells.
  • the carriages arranged at both ends of the spacer are provided with a ballast weight. These weights ensure that the film attached to the spacer is lowered substantially automatically.
  • each carriage In order to prevent the carriages from jamming within their guide rails, it is expedient to provide each carriage with at least two rollers lying one behind the other in the direction of movement.
  • the rail or the carriage receiving the rail is expediently provided with a U-profile, the U-legs of which serve on the inside as a running surface for the rollers. The roles are further secured in position by an L-leg.
  • the rail can be advantageous to design the rail as a T-piece and to provide a pair of roller arrangement, the inner sides of the T-legs each serving as a running surface for one of the rollers.
  • a carriage guide designed in this way also proves to be protected against tilting transversely to the film or to the longitudinal axis of the slot.
  • the earth slot 10 illustrated in the figures is used to produce a diaphragm wall.
  • the earth slot 10 is filled with a suspension 11 of water, cement, clay or bentonite and other additives.
  • a membrane 12 is introduced, which consists of membrane sheets welded or to be welded together 12a and 12b is composed. Plastic or stainless steel can be used as the membrane material.
  • Hollow bodies are used as lateral guide rails 13, 14 for the vertical edges of the membrane tracks 12a, 12b, each consisting of a first and a second half-shell 17, 18. Since both hollow bodies are the same, only reference is made to the left-hand hollow body in the following description in connection with the structural details.
  • the half-shells 17, 18 are each made of steel and their length is dimensioned such that they extend from the bottom of the slot 10 to the surface of the suspension 11. Each half-shell 17, 18 has a bulge to form a cavity 20, a left and right vertical sealing edge 21, 22 and a bottom. In the example shown here, the left and right sealing edges 21, 22 are designed as an outwardly projecting band which can carry an elastic sealing lip. If the first and second half-shells 17, 18 are pressed against one another at their sealing edges 21, 22, a cavity which is open at the top and is otherwise sealed is created.
  • first and second half-shells 17, 18 are held at a predetermined distance from one another, a first and a second vertical guide gap 23, 24 are formed between the pairs of opposite shell edges, between which the edge regions 25, 26 of the membrane membranes 12a, 12b in question are reliable and can be inserted into the earth slot 10 with a precise fit.
  • a spacer 31 is guided in the manner described below by means of two carriages 29, 30, with which the two guide rails 13, 14 are aligned parallel to one another.
  • releasable clamping devices 32 for fastening the lower end of the membrane web 12b.
  • the carriages 29, 30 each comprise a pair of rollers 33, 34 arranged one behind the other in the direction of movement.
  • the rollers 33, 34 are connected via axis extensions 35 and intermediate pieces 36 to the spacer 31 which is suspended, for example, from a crane (not shown) and which is provided with a ballast weight.
  • the slide rails 27, 28 have a U-cross section with an opening directed away from the membrane 12, so that the inner sides of the U-legs serve as running surfaces for the rollers 33, 34.
  • one of the U-legs is provided with an L-leg 37 encompassing the rollers 33, 34.
  • Each of the two guide rails 13, 14 is provided with a self-aligning bearing 38, 39 for support or for collection on a guide wall 40 (FIG. 2).
  • pins 41 and 42 are arranged longitudinally displaceably on brackets 43, 44 on each outer side of the half-shells 17, 18 transversely to the membrane plane.
  • a vertical guide for the membrane web 12b is also illustrated in accordance with FIG. 1.
  • the associated sealing edge 22 is provided with a vertical groove 46, in which a web 47, which is applied to the membrane web 12b, is guided.
  • the vertical pull of the carriages 29, 30 relieves these film locks, and none of them can lateral forces due to canting occur.
  • the membrane sheet 12a and the rail 13 are already lowered in the earth slot 10.
  • the second guide rail 14 is then lowered into the earth slot at a distance corresponding to the width of the membrane 12b and supported on the pendulum bearing 39. Due to its own weight, the guide rail 14, like the guide rail 13, is oriented exactly vertically, the pendulum axis extending transversely to the membrane 12. Then the lower end of the membrane sheet 12b to be inserted is clamped in with the aid of the fastening devices 32, and the two carriages 29, 30 are inserted into the slide rails 27 'and 28, the spacer 31 being held on a crane by means of a cable suspension 48.
  • the spacer 31, in cooperation with the carriages 29, 30, ensures a very high accuracy of the parallelism of the two guide rails 13, 14 and an essentially smooth movement. If it is necessary to compensate, the two guide rails 13, 14 can pivot relative to one another during the lowering.
  • the fastening devices are released, for example with the aid of a cable (not shown), and the spacer 31 with the carriages 29, 30 can be withdrawn.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Tents Or Canopies (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The device consists of guide rails (13, 14) inserted in pairs into a suspension-filled slot (10) in the earth. The ends of a sealing membrane (12) are guided on the guide rails (13, 14) during the lowering. The two rails (13, 14) are mounted on the guiding wall (40) of the slot (10) in the earth by self-aligning bearings (38, 39) so that they can be aligned exactly vertically and parallel to one another on account of their dead weight. In addition, both guide rails (13, 14) are provided with sliding rails (27, 28). The membrane sheet (12a, 12b) to be lowered is fastened to a weighted horizontal spacer (31) which is guided laterally in the sliding rails (27, 28) via carriages (29, 30). In this way, canting of the membrane sheet (12a, 12b) in the guide rails (13, 14) is avoided during lowering, the spacer (31) ensuring the parallelism and alignment of the guide rails (13, 14). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Einbringen einer Dichtungsmembran in einen suspensionsgefüllten Erdschlitz, wobei Membranbahnen fortlaufend nacheinander jeweils seitlich angesetzt und an der Ansatzstelle miteinander verbunden werden, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for introducing a sealing membrane into a suspension-filled earth slot, wherein membrane sheets are successively attached laterally and connected to one another at the attachment point, according to the preamble of claim 1.

Derartige Vorrichtungen werden im Tiefbau bei der Herstellung von abgedichteten, vertikalen Schlitzwänden eingesetzt, die in der Regel aus einer Suspension von Wasser, Zement, Ton oder Bentonit und sonstigen Zusatzmitteln oder Zusatzstoffen bestehen. Sie dienen im Erdreich als Absperrung. Die Dichtungsmembranen aus Edelstahl oder Kunststoff werden zur vollständigen und zuverlässigen Abdichtung integriert. Im Zuge des Baufortschritts müssen einzelne Membranbahnen fortlaufend aneinander angesetzt und miteinander verbunden werden.Such devices are used in civil engineering for the production of sealed, vertical diaphragm walls, which usually consist of a suspension of water, cement, clay or bentonite and other additives. They serve as a barrier in the ground. The sealing membranes made of stainless steel or plastic are integrated for complete and reliable sealing. As the construction progresses, individual membrane sheets must be continuously attached to one another and connected to one another.

Aus der DE-OS 35 40 270 ist bekannt, Kunststoffbahnen auf biegesteife, rahmenartige Tragelemente aufzuspannen und in den suspensionsgefüllten Erdschlitz abzusenken. Besonders bei großen Windkräften kann dies zu erheblichen Schwierigkeiten führen, da der bespannte Rahmen außerhalb des Erdschlitzes große Windangriffsflächen bietet. Ferner müssen die vertikalen Folienränder zumindest teilweise mit ineinander greifenden, schloßartigen Elementen versehen sein, um eine dichte Verbindung mit der benachbarten Folie zu halten. In der praktischen Anwendung ist es meistens unvermeidlich, daß das betreffende Tragelement stark exzentrisch vom Verbindungsschloß angreift. Dadurch entstehen Verkantungen, was zu Verformungen der Folie bzw. zu Schwierigkeiten beim Einziehen der Folie in das Schloß durch erhöhte Schloßreibung führen kann.From DE-OS 35 40 270 it is known to stretch plastic sheets onto rigid, frame-like support elements and to lower them into the suspension-filled earth slot. This can lead to considerable difficulties, particularly in the case of large wind forces, since the covered frame offers large areas exposed to wind outside the earth slot. Furthermore, the vertical film edges must at least partially be provided with interlocking, lock-like elements in order to maintain a tight connection with the adjacent film. In practical use, it is usually inevitable that the support element in question acts strongly eccentrically from the connecting lock. This causes canting, which leads to deformation of the film or difficulties in pulling the film into the lock can lead to increased lock friction.

Außerdem ist aus der DE-OS 34 28 297 bekannt, die Dichtungsmembranen mit Hilfe von Schienen in den Erdschlitz einzuziehen, in welchen die vertikalen Seitenränder der betreffenden Membranen geführt sind. Die Schienen bestehen jeweils aus zwei gegenüberliegenden Halbschalen, die so angeordnet sind, daß die vertikalen Schalenränder jeweils paarweise einen ersten und einen zweiten Führungsspalt für zwei aneinanderzusetzende Folien bilden. Jeweils zwei Führungen werden im Wechsel an der jeweiligen Ansatzstelle bzw. am freien Rand der jeweils nächsten einzuziehenden Membranbahn eingesetzt, wobei eine Führung bei zwei aufeinanderfolgenden Einziehvorgängen unverändert in ihrer Position verbleibt und die andere Führung um die Breite der beiden betreffenden Membranbahnen seitlich versetzt wird. Wenn jedoch die Führungen nicht absolut parallel und vertikal angeordnet sind, ist eine erhebliche Reibung in den Folienschlössern unvermeidlich.
Außerdem kann es sich als schwierig erweisen, daß eine Membranbahn bezüglich der beiden Ränder vollständig synchron eingezogen wird. Ansonsten besteht die Gefahr, daß die Membranbahn verkantet, was wiederum zu einer hohen Reibung in den Schlössern führt.
It is also known from DE-OS 34 28 297 to pull the sealing membranes into the earth slot with the aid of rails, in which the vertical side edges of the membranes in question are guided. The rails each consist of two opposite half-shells, which are arranged in such a way that the vertical edges of the shells each form a first and a second guide gap for two foils to be attached to one another. Two guides are used alternately at the respective attachment point or at the free edge of the next membrane sheet to be drawn in, with one guide remaining in its position unchanged in two successive pulling-in processes and the other guide being laterally offset by the width of the two membrane sheets in question. However, if the guides are not arranged absolutely parallel and vertically, considerable friction in the film locks is inevitable.
In addition, it can be difficult for a membrane sheet to be drawn in completely synchronously with respect to the two edges. Otherwise there is a risk that the membrane web will tilt, which in turn leads to high friction in the locks.

Eine gattungsgemäße Vorrichtung ist aus der DE-OS 37 27 202 bekannt. Voneinander beabstandete Hohlkörper, die in einen suspensionsgefüllen Erdschlitz abgesenkt werden, weisen Längsschlitze zur Führung der vertikalten Ränder einer in den Bodenschlitz einzubringenden Membranbahn auf. Im Innenraum der Hohlkörper werden die Seitenkanten der Membranbahn von Einführwerkzeugen ergriffen und von diesen nach unten gezogen.A generic device is known from DE-OS 37 27 202. Hollow bodies spaced apart from one another and lowered into a suspension-filled earth slot have longitudinal slots for guiding the vertical edges of a membrane web to be inserted into the bottom slot. In the interior of the hollow body, the side edges of the membrane web are gripped by insertion tools and pulled downwards by them.

Es werden komplizierte und somit kostenintensive Einführwerkzeuge benötigt, wobei eine synchrone Absenkbewegung der Einführwerkzeuge nicht gewährleistet ist. Außerdem wird die Membranbahn nur an ihren äußeren Seitenkanten ergriffen, wodurch die Gefahr eines Einreißens der Membranhan im Mittelbereich gegeben ist. Ferner ist es nicht ohne weiteres möglich, eine schnelle Anpassung an verschiedene Schlitztiefen durchzuführen.Complicated and therefore cost-intensive insertion tools are required, and a synchronous lowering movement of the insertion tools is not guaranteed. In addition, the membrane sheet is gripped only on its outer side edges, which means that there is a risk of the membrane membrane tearing in the central region. Furthermore, it is not readily possible to quickly adapt to different slot depths.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art anzugeben, mit welcher die zu verbindenden Membranbahnen mit geringem konstruktivem Aufwand und bei wenig Platzbedarf zielgenau in den mit Suspension gefüllten Erdschlitz eingezogen werden können.The invention has for its object to provide a device of the type mentioned, with which the membrane sheets to be connected can be retracted precisely into the earth slot filled with suspension with little design effort and little space.

Diese Aufgabe wird gemäß dem kennzeichnenden Teil des unabhängigen Patentanspruchs gelöst.This object is achieved according to the characterizing part of the independent claim.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteansprüchen und der Figurenbeschreibung enthalten.Advantageous refinements and developments of the invention are contained in the subclaims and the description of the figures.

Die Erfindung hat den Vorteil, daß ein Reißen der Membranbahnen zurverlässig verhindert wird. Ferner können die beispielsweise als Hohlkörper ausgeführten Führungsschienen schnell und unaufwendig an verschiedene Schlitzwandtiefen angepaßt werden.The invention has the advantage that tearing of the membrane sheets is reliably prevented. Furthermore, the guide rails, for example designed as a hollow body, can be quickly and easily adapted to different diaphragm wall depths.

Ein Verkanten von Schlössern oder der verwendeten Einziehvorrichtungen wird dadurch verhindert, daß wenigstens einer der beiden als Führungsschienen verwendeten Hohlkörper pendelnd aufgelagert ist. Durch diese Maßnahme vereinfacht sich das notwendige Ausrichten der verwendeten Hohlkörper bzw. Führungschienen einerseits in eine absolut vertikale Lage und andererseits auf einen gleichen Abstand über die gesamte Länge. Die parallele Ausrichtung kann selbsttätig erfolgen, wenn der an zwei benachbarten Hohlkörpern schienengeführte, gewichts-belastete Abstandhalter eingesetzt wird.Tilting of locks or the retracting devices used is prevented by at least one of the two hollow bodies used as guide rails is swinging. This measure simplifies the necessary alignment of the hollow bodies or guide rails used on the one hand in an absolutely vertical position and on the other hand at an equal distance over the entire length. The parallel alignment can take place automatically if the weight-loaded spacer, which is guided on two adjacent hollow bodies, is used.

Da das Pendellager längsverschieblich an der betreffenden Membranführungsschiene angeordnet ist, kann auf einfache Weise eine Anpassung an unterschiedliche Schlitztiefen und/oder an die Position der betreffenden Leitwand vorgenommen werden.Since the self-aligning bearing is arranged to be longitudinally displaceable on the membrane guide rail in question, it can be easily adapted to different slot depths and / or to the position of the guide wall in question.

Werden beide Führungschienen pendelnd aufgelagert, so hat dies den Vorteil, daß aufgrund des Eigengewichts auch eine selbsttätige lotrechte Ausrichtung erfolgt.If both guide rails are supported in an oscillating manner, this has the advantage that an automatic vertical alignment also takes place due to its own weight.

Eine besonders zweckmäßige und einfache Ausgestaltung des Pendellagers besteht darin, daß es aus zwei Zapfen besteht, die auf den gegenüberliegenden Seiten der Membranführungsschiene bzw. auf den Außenseiten der beiden Halbschalen angeordnet sind, wenn die Führungsschiene aus zwei Halbschalen besteht.A particularly expedient and simple embodiment of the self-aligning bearing consists in the fact that it consists of two pins which are arranged on the opposite sides of the membrane guide rail or on the outer sides of the two half-shells if the guide rail consists of two half-shells.

Im Zusammenhang mit dem auf Schienen geführten Abstandhalter ist es grundsätzlich ausreichend,
daß die an beiden Enden des Abstandhalters angeordneten Wagen mit einem Ballastgewicht versehen sind. Diese Gewichte stellen sicher, daß die am Abstandhalter befestigte Folie im wesentlichen selbsttätig abgesenkt wird.
Alternativ dazu kann es auch zweckmäßig sein, die beiden Wagen und/oder den Abstandshalter mit Hilfe von Schubstangen, insbesondere "Teleskopstangen", oder mit Hilfe von Seilzügen abzusenken.
In connection with the spacer guided on rails, it is generally sufficient
that the carriages arranged at both ends of the spacer are provided with a ballast weight. These weights ensure that the film attached to the spacer is lowered substantially automatically.
As an alternative to this, it can also be expedient to lower the two carriages and / or the spacer with the aid of push rods, in particular “telescopic rods”, or with the aid of cable pulls.

Um zu verhindern, daß sich die Wagen innerhalb ihrer Führungsschienen verkanten, ist es zweckmäßig, jeden Wagen mit mindestens zwei in Bewegungsrichtung hintereinanderliegenden Rollen zu versehen.In order to prevent the carriages from jamming within their guide rails, it is expedient to provide each carriage with at least two rollers lying one behind the other in the direction of movement.

Zweckmäßigerweise ist die die Rollen bzw. die Wagen aufnehmende Schiene mit einem U-Profil versehen, dessen U-Schenkel innenseitig als Lauffläche für die Rollen dienen. Die Rollen sind ferner seitlich durch einen L-Schenkel in ihrer Position gesichert.The rail or the carriage receiving the rail is expediently provided with a U-profile, the U-legs of which serve on the inside as a running surface for the rollers. The roles are further secured in position by an L-leg.

Alternativ dazu kann es vorteilhaft sein, die Schiene als T-Stück auszubilden sowie eine paarweise Rollenanordnung vorzusehen, wobei die Innenseiten der T-Schenkel jeweils als Lauffläche für eine der Rollen dienen.
Eine in dieser Art ausgestaltete Wagenführung erweist sich auch gegen ein Verkanten quer zur Folie bzw. zur Schlitzlängsachse geschützt.
Alternatively, it can be advantageous to design the rail as a T-piece and to provide a pair of roller arrangement, the inner sides of the T-legs each serving as a running surface for one of the rollers.
A carriage guide designed in this way also proves to be protected against tilting transversely to the film or to the longitudinal axis of the slot.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles weiter beschrieben.

  • Fig. 1 zeigt schematisch eine Aufsicht auf einen suspensionsgefüllten Erdschlitz und eine darin abgesenkte Vorrichtung zum Einbringen einer Membranbahn.
  • Fig. 2 zeigt eine Teil-Seitenansicht der Vorrichtung.
  • Fig. 3 zeigt schematisch einen Vertikal-Längsschnitt durch die Vorrichtung gemäß Figur 1 entlang der Schnittlinie II-II.
The invention is described below with reference to an embodiment shown in the drawing.
  • 1 schematically shows a top view of a suspension-filled earth slot and a device for inserting a membrane web lowered therein.
  • Fig. 2 shows a partial side view of the device.
  • 3 schematically shows a vertical longitudinal section through the device according to FIG. 1 along the section line II-II.

Der in den Figuren veranschaulichte Erdschlitz 10 dient zur Herstellung einer Schlitzwand. Der Erdschlitz 10 ist mit einer Suspension 11 von Wasser, Zement, Ton oder Bentonit und weiteren Zusätzen gefüllt. Zur zuverlässigen Abdichtung der Schlitzwand wird eine Membran 12 eingebracht, die aus miteinander verschweißten bzw. zu verschweißenden Membranbahnen 12a und 12b zusammengesetzt ist. Als Membranmaterial kann Kunststoff oder Edelstahl verwendet werden.The earth slot 10 illustrated in the figures is used to produce a diaphragm wall. The earth slot 10 is filled with a suspension 11 of water, cement, clay or bentonite and other additives. For reliable sealing of the diaphragm wall, a membrane 12 is introduced, which consists of membrane sheets welded or to be welded together 12a and 12b is composed. Plastic or stainless steel can be used as the membrane material.

Als seitliche Führungsschienen 13, 14 für die vertikalen Ränder der Membranbahnen 12a, 12b werden jeweils Hohlkörper verwendet, die jeweils aus einer ersten und einer zweiten Halbschale 17, 18 bestehen. Da beide Hohlkörper gleich sind, wird in der nachfolgenden Beschreibung im Zusammenhang mit den konstruktiven Einzelheiten lediglich auf den linksseitigen Hohlkörper Bezug genommen.Hollow bodies are used as lateral guide rails 13, 14 for the vertical edges of the membrane tracks 12a, 12b, each consisting of a first and a second half-shell 17, 18. Since both hollow bodies are the same, only reference is made to the left-hand hollow body in the following description in connection with the structural details.

Die Halbschalen 17, 18 sind jeweils aus Stahl hergestellt und ihre Länge ist so bemessen, daß sie von der Sohle des Erdschlitzes 10 bis über die Oberfläche der Suspension 11 reichen. Jede Halbschale 17, 18 weist eine Ausbauchung zur Bildung eines Hohlraumes 20, einen linken und rechten vertikalen Dichtrand 21, 22 sowie einen Boden auf.
In dem hier dargestellten Beispiel ist der linke und der rechte Dichtrand 21, 22 als nach außen überstehendes Band ausgebildet, welches eine elastische Dichtlippe tragen kann. Werden die erste und zweite Halbschale 17, 18 an ihren Dichträndern 21, 22 aneinander gedrückt, so entsteht ein nach oben offener und ansonsten dicht abgeschlossener Hohlraum.
The half-shells 17, 18 are each made of steel and their length is dimensioned such that they extend from the bottom of the slot 10 to the surface of the suspension 11. Each half-shell 17, 18 has a bulge to form a cavity 20, a left and right vertical sealing edge 21, 22 and a bottom.
In the example shown here, the left and right sealing edges 21, 22 are designed as an outwardly projecting band which can carry an elastic sealing lip. If the first and second half-shells 17, 18 are pressed against one another at their sealing edges 21, 22, a cavity which is open at the top and is otherwise sealed is created.

Werden die erste und zweite Halbschale 17, 18 in einem vorgegebenen Abstand voneinander gehalten, so werden zwischen den paarweise gegenüberliegenden Schalenrändern ein erster und ein zweiter vertikaler Führungsspalt 23, 24 gebildet, zwischen welchen die Randbereiche 25, 26 der betreffenden Membranbahnen 12a, 12b zuverlässig und paßgenau in den Erdschlitz 10 eingeführt werden können.If the first and second half-shells 17, 18 are held at a predetermined distance from one another, a first and a second vertical guide gap 23, 24 are formed between the pairs of opposite shell edges, between which the edge regions 25, 26 of the membrane membranes 12a, 12b in question are reliable and can be inserted into the earth slot 10 with a precise fit.

Auf den Dichträndern 21, 22 einer Halbschale 17 eines Hohlkörpers sind in unmittelbarer Nähe der beiden Führungsspalten 23,24 parallel zu diesen Gleitschienen 27, 28 angeordnet. Die betreffenden Halbschalen 17, 17′ liegen jeweils auf der gleichen Seite der Membran 12. In den Gleitschienen 28 bzw. 27′ wird in der nachfolgend beschriebenen Weise mittels zweier Wagen 29, 30 ein Abstandhalter 31 geführt, mit welchem einerseits die beiden Führungsschienen 13, 14 parallel zueinander ausgerichtet werden. Andererseits ist er mit lösbaren Klemmvorrichtungen 32 zur Befestigung des unteren Endes der Membranbahn 12b versehen.On the sealing edges 21, 22 of a half-shell 17 of a hollow body in the immediate vicinity of the two guide gaps 23, 24 are arranged parallel to these slide rails 27, 28. The relevant half-shells 17, 17 'are each on the same side of the membrane 12. In the slide rails 28 and 27 ', a spacer 31 is guided in the manner described below by means of two carriages 29, 30, with which the two guide rails 13, 14 are aligned parallel to one another. On the other hand, it is provided with releasable clamping devices 32 for fastening the lower end of the membrane web 12b.

Die Wagen 29, 30 umfassen in dem hier dargestellten Beispiel jeweils ein Paar von in Bewegungsrichtung hintereinander angeordneten Rollen 33,34. Die Rollen 33,34 sind über Achsverlängerungen 35 und Zwischenstücke 36 mit dem beispielsweise an einem Kran (nicht dargestellt) aufgehängten Abstandhalter 31 verbunden, der mit einem Ballastgewicht versehen ist.In the example shown here, the carriages 29, 30 each comprise a pair of rollers 33, 34 arranged one behind the other in the direction of movement. The rollers 33, 34 are connected via axis extensions 35 and intermediate pieces 36 to the spacer 31 which is suspended, for example, from a crane (not shown) and which is provided with a ballast weight.

Bei dieser konstruktiven Ausgestaltung der Wagen 29, 30 weisen die Gleitschienen 27, 28 einen U-Querschnitt mit einer von der Membran 12 weggerichteten Öffnung auf, so daß die Innenseiten der U-Schenkel als Laufflächen für die Rollen 33, 34 dienen. Um eine Führung in Achsrichtung zu gewährleisten, ist in dem dargestellten Beispiel einer der U-Schenkel mit einem die Rollen 33, 34 umgreifenden L-Schenkel 37 versehen. Jede der beiden Führungsschienen 13, 14 ist mit einem Pendellager 38, 39 zur Auflagerung bzw. zum Auffangen auf einer Leitwand 40 (Figur 2) versehen. Hierzu sind an jeder Außenseite der Halbschalen 17, 18 quer zur Membranebene Zapfen 41 bzw. 42 über Halterungen 43, 44 längsverschiebbar angeordnet. Durch eine Verschiebung der Halterungen 43, 44 gemäß Pfeil 45 kann die Position der Pendellager 38,39 an unterschiedliche Erdschlitztiefen angepaßt werden.In this design of the carriage 29, 30, the slide rails 27, 28 have a U-cross section with an opening directed away from the membrane 12, so that the inner sides of the U-legs serve as running surfaces for the rollers 33, 34. In order to ensure guidance in the axial direction, in the example shown one of the U-legs is provided with an L-leg 37 encompassing the rollers 33, 34. Each of the two guide rails 13, 14 is provided with a self-aligning bearing 38, 39 for support or for collection on a guide wall 40 (FIG. 2). For this purpose, pins 41 and 42 are arranged longitudinally displaceably on brackets 43, 44 on each outer side of the half-shells 17, 18 transversely to the membrane plane. By moving the brackets 43, 44 according to arrow 45, the position of the self-aligning bearings 38, 39 can be adapted to different earth slot depths.

Am Beispiel der Halbschale 18 ist ferner gemäß Figur 1 eine Vertikalführung für die Membranbahn 12b veranschaulicht. Der zugehörige Dichtrand 22 ist mit einer Vertikalnut 46 versehen, in welcher ein auf der Membranbahn 12b aufgebrachter Steg 47 geführt ist. Durch den Vertikalzug der Wagen 29, 30 sind diese Folienschlösser entlastet, und es können keine seitlichen Zwängungskräfte aufgrund von Verkantungen auftreten.Using the example of the half-shell 18, a vertical guide for the membrane web 12b is also illustrated in accordance with FIG. 1. The associated sealing edge 22 is provided with a vertical groove 46, in which a web 47, which is applied to the membrane web 12b, is guided. The vertical pull of the carriages 29, 30 relieves these film locks, and none of them can lateral forces due to canting occur.

Nachfolgend wird die Funktion der Vorrichtung anhand der Figuren 1 bis 3 näher erläutert. Es wird hierbei davon ausgegangen, daß die Membranbahn 12a sowie die Schiene 13 bereits im Erdschlitz 10 abgesenkt sind. Anschließend wird die zweite Führungsschiene 14 in dem der Breite der Membran 12b entsprechenden Abstand in den Erdschlitz abgesenkt und an der Pendellagerung 39 aufgelagert.
Aufgrund ihres Eigengewichts richtet sich die Führungsschiene 14 ebenso wie die Führungsschiene 13 genau vertikal aus, wobei die Pendelachse quer zur Membran 12 verläuft.
Anschließend wird das unterseitige Ende der einzuführenden Membranbahn 12b mit Hilfe der Befestigungsvorrichtungen 32 eingeklemmt,und die beiden Wagen 29, 30 werden in die Gleitschienen 27′ bzw. 28 eingesetzt, wobei der Abstandhalter 31 über eine Seilaufhängung 48 an einem Kran gehalten wird. Während des anschließenden Absenkens gewährleistet der Abstandhalter 31 im Zusammenwirken mit den Wagen 29, 30 eine sehr hohe Genauigkeit der Parallelität der beiden Führungsschienen 13, 14 und eine im wesentlichen reibungslose Bewegung. Falls es zum Ausgleich erforderlich ist, können sich die beiden Führungsschienen 13, 14 während des Absenkens relativ zueinander verschwenken.
Wenn die Membranbahn 12b auf Endtiefe eingezogen ist, werden die Befestigungsvorrichtungen, beispielsweise mit Hilfe eines Seilzuges (nicht dargestellte), gelöst,und der Abstandhalter 31 mit den Wagen 29, 30 kann zurückgezogen werden.
The function of the device is explained in more detail below with reference to FIGS. 1 to 3. It is assumed here that the membrane sheet 12a and the rail 13 are already lowered in the earth slot 10. The second guide rail 14 is then lowered into the earth slot at a distance corresponding to the width of the membrane 12b and supported on the pendulum bearing 39.
Due to its own weight, the guide rail 14, like the guide rail 13, is oriented exactly vertically, the pendulum axis extending transversely to the membrane 12.
Then the lower end of the membrane sheet 12b to be inserted is clamped in with the aid of the fastening devices 32, and the two carriages 29, 30 are inserted into the slide rails 27 'and 28, the spacer 31 being held on a crane by means of a cable suspension 48. During the subsequent lowering, the spacer 31, in cooperation with the carriages 29, 30, ensures a very high accuracy of the parallelism of the two guide rails 13, 14 and an essentially smooth movement. If it is necessary to compensate, the two guide rails 13, 14 can pivot relative to one another during the lowering.
When the membrane sheet 12b has been drawn in to the final depth, the fastening devices are released, for example with the aid of a cable (not shown), and the spacer 31 with the carriages 29, 30 can be withdrawn.

Anschließend werden die Dichtränder 21, 22 aneinander gepreßt, um den linken Hohlraum 20 abzudichten. Nachdem die darin enthaltene Suspension entfernt ist, werden die betreffenden Membranränder miteinander verklebt und die Führungsschiene 13 entfernt.Then the sealing edges 21, 22 are pressed together to seal the left cavity 20. After the suspension contained therein is removed, the membrane edges in question are glued together and the guide rail 13 is removed.

Claims (7)

  1. Apparatus for introducing a sealing diaphragm (12) into a suspension-filled earth slot (10), in which diaphragm webs (12a,12b) with a pair of lateral guide rails (13,14) are successively lowered, in each case laterally applied and interconnected at the application point and on at least one of the two guide rails is provided a self-aligning bearing (38,39) for bearing on a guide wall (40) or the like and in which the oscillating axis is at right angles to the slot direction or to the diaphragm, characterized in that the self-aligning bearing (38,39) is longitudinally displaceably located on the guide rail (13,14), that the guide rails (13,14) are provided with a slide rail (27,28) running parallel to the longitudinal axis, that a movable, horizontally aligned spacer (31) is provided, on each of whose ends there is a carriage (29,30), that detachable fastening devices (32) for the diaphragm web (12b) to be lowered are provided on the spacer (31) and that on lowering the diaphragm web (12b) in each case one carriage (29) is guided in one of the slide rails (27,28).
  2. Apparatus according to claim 1, characterized in that the self-aligning bearing (38,39) comprises two guide rail side journals (41,42).
  3. Apparatus according to claims 1 or 2, characterized in that both guide rails (13,14) bear with a self-aligning bearing (38,39).
  4. Apparatus according to one of the claims 1 to 3, characterized in that the spacer (31) is provided with a ballast weight.
  5. Apparatus according to one of the claims 1 to 4, characterized in that each carriage (29,30) is provided with at least two rolls (33,34) located behind one another in the movement direction.
  6. Apparatus according to one of the claims 1 to 5, characterized in that the carriages (29,30) have at least two rolls (33,34) juxtaposed in the axial direction.
  7. Apparatus according to one of the claims 1 to 6, characterized in that the slide rails (27,28) have a U or T-shaped cross-section and that the insides of the U or T-legs serve as a rolling surface for the rolls (33,34).
EP90105259A 1989-04-05 1990-03-20 Device for placing a sealing-membrane in a slot in the earth filled with suspension Expired - Lifetime EP0391127B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90105259T ATE82606T1 (en) 1989-04-05 1990-03-20 DEVICE FOR INSTALLING A SEALING MEMBRANE INTO A SUSPENSION-FILLED EARTH STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911043 1989-04-05
DE3911043A DE3911043A1 (en) 1989-04-05 1989-04-05 DEVICE FOR INSERTING A SEALING MEMBRANE IN A SUSPENSION-FILLED EARTH SLOT

Publications (2)

Publication Number Publication Date
EP0391127A1 EP0391127A1 (en) 1990-10-10
EP0391127B1 true EP0391127B1 (en) 1992-11-19

Family

ID=6377936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105259A Expired - Lifetime EP0391127B1 (en) 1989-04-05 1990-03-20 Device for placing a sealing-membrane in a slot in the earth filled with suspension

Country Status (3)

Country Link
EP (1) EP0391127B1 (en)
AT (1) ATE82606T1 (en)
DE (2) DE3911043A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005518579A (en) 2002-01-31 2005-06-23 インスツルメンテル リミテッド Reverse search system and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3428297C3 (en) * 1984-08-01 1994-02-24 Zueblin Ag Method of connecting membranes serving as additional flow and / or diffusion barrier and connecting tube for use in this method
DE3444691A1 (en) * 1984-12-07 1986-06-12 Ed. Züblin AG, 7000 Stuttgart Method and apparatus for placing planar sealing elements in trench walls
DE3444690A1 (en) * 1984-12-07 1986-06-12 Ed. Züblin AG, 7000 Stuttgart METHOD AND DEVICE FOR INSERTING PANELS IN SLOT WALL
DE3540270A1 (en) * 1985-11-13 1987-05-14 Wayss & Freytag Ag Method of producing a diaphragm wall and apparatus for carrying out the method
DE3727202A1 (en) * 1987-08-14 1989-03-02 Held & Francke Bau Ag Method of constructing sealing trench walls

Also Published As

Publication number Publication date
DE59000475D1 (en) 1992-12-24
ATE82606T1 (en) 1992-12-15
DE3911043A1 (en) 1990-10-11
EP0391127A1 (en) 1990-10-10
DE3911043C2 (en) 1992-04-23

Similar Documents

Publication Publication Date Title
EP2010717B1 (en) Method for lining ditches
DE2302053C3 (en) Shoring device for a line trench or the like. with a stepped cross-section
DE2349802C2 (en) Shoring device for cable trenches
EP0106124A2 (en) Apparatus for forming flanges at air ducts
DE2323321B2 (en) Device for trench sheeting
DE3228315C2 (en) Sealing device for sealing expansion joints on the building site
DE2654229C3 (en) Device for stiffening trenches or the like.
DE2943974A1 (en) PRESS RELEASE FOR A PAPER MACHINE
EP0046553A1 (en) Apparatus for shoring trenches with lining panels
EP0391127B1 (en) Device for placing a sealing-membrane in a slot in the earth filled with suspension
DE2352476A1 (en) Two-part steel door case for double concrete wall - with both parts able to slide together telescopically
AT395740B (en) METHOD FOR PRODUCING A VERTICAL SEALING MEMBRANE IN A SUSPENSION-FILLED EARTH SLOT, AND DEVICE FOR CARRYING OUT THE METHOD
EP0393448B1 (en) Shoring apparatus for retaining trenches
EP2722443A1 (en) Method and device for shoring deep trenches
EP3636848B1 (en) Wedge element, spacer comprising at least one such wedge element, positioning device comprising such a spacer and method for positioning wall formwork
DE3112750C2 (en) Shoring plate for supporting trench walls
DE3109165C2 (en) Device for inserting an elastic sealing strip into a joint
DE4428513A1 (en) Method of arranging a seal between two zones of a cast wall and apparatus for carrying out this method
DE3320829C1 (en) Completely resilient extension arch for pit lines, tunnels or the like
DE3811933A1 (en) Device for connecting two tubes
DE3042942C2 (en) Process for creating tunnels
DE4236489C2 (en) Method for installing sealing wall foils in a sealing slot wall and device for carrying out the method
DE2026902C3 (en) Pre-pledging cap for support frames
EP0678629A1 (en) Shoring device
DE2560181C2 (en) Device for laying a pipe string in a trench

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19900818

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE LI

17Q First examination report despatched

Effective date: 19920109

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE LI

REF Corresponds to:

Ref document number: 82606

Country of ref document: AT

Date of ref document: 19921215

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59000475

Country of ref document: DE

Date of ref document: 19921224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19930331

Ref country code: CH

Effective date: 19930331

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19950331

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19950427

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19960320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19961203