EP0191849A1 - Procede et dispositif d'enfoncement d'un agencement entourant un materiau souple de surface dans un fosse rempli de boue thixotrope - Google Patents

Procede et dispositif d'enfoncement d'un agencement entourant un materiau souple de surface dans un fosse rempli de boue thixotrope

Info

Publication number
EP0191849A1
EP0191849A1 EP19850904420 EP85904420A EP0191849A1 EP 0191849 A1 EP0191849 A1 EP 0191849A1 EP 19850904420 EP19850904420 EP 19850904420 EP 85904420 A EP85904420 A EP 85904420A EP 0191849 A1 EP0191849 A1 EP 0191849A1
Authority
EP
European Patent Office
Prior art keywords
movement
arrangement
lower edge
traction
surface material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19850904420
Other languages
German (de)
English (en)
Inventor
Heiner I. Hammer
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.)
Schlegel Lining Technology GmbH
Original Assignee
Schlegel Lining Technology 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 Schlegel Lining Technology GmbH filed Critical Schlegel Lining Technology GmbH
Publication of EP0191849A1 publication Critical patent/EP0191849A1/fr
Withdrawn legal-status Critical Current

Links

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

Definitions

  • the invention relates to a method and a device for sinking an arrangement comprising a flexible surface material with an essentially vertical extension, for example a plastic film, into a trench filled with a thixotropic slurry.
  • the known method can encounter difficulties if the pocket-shaped double film on the walls of the Trench finds strong frictional resistance because the sand filling of the bag not only pulls it down, but also presses the film against the vertical side walls, and it is difficult to check whether the bag actually reached the desired depth in the correct position during the lowering.
  • the invention has for its object to provide a method and an apparatus which allows the easier and controllable lowering of an arrangement which comprises a flexible surface material, for example a plastic film.
  • the solution according to the invention consists in that the lower edge of the arrangement to be lowered is subjected to an essentially vertically pulling force and additionally to a constant relative movement with respect to the slug.
  • the relative movement of the lower edge of the assembly can be of any type provided that the goal of liquefaction of the thixotropic slurry is achieved.
  • a vibration movement is preferred, which expediently comprises a component running transversely to the plane of extent of the sheet material.
  • a vibration movement running in the vertical direction has also proven itself, whereby this can be connected in particular with a horizontal vibration movement, for example in the form of a rotary vibration about a rotation axis parallel to the direction of the edge. Vibration in the direction of the lower edge of the arrangement can also be expedient in some cases.
  • a swelling vibration if the said edge is formed by a flexible hose which is subjected to changing pressure.
  • a rotation movement is provided, specifically by means of roller-shaped components which can be rotated and driven along the lower edge of the arrangement about axes of rotation running parallel to it.
  • a traction and movement apparatus is used to apply the tensile forces and the relative movement, in the arrangement to be lowered with the lower edge of the flexible surface material connected is.
  • it can be connected from the outside to the edge of the sheet material, for example clamped onto it.
  • it is placed in a pocket forming the lower edge of the surface material, it being irrelevant whether it is provided only as a hem or represents the lower end of a double film which is closed in the form of a pocket.
  • the arrangement of the apparatus in a pocket has the advantage that the vertically downward forces do not have to be transmitted from the apparatus to the film edge by additional connecting means.
  • the traction and movement apparatus connected to the lower edge of the sheet material can be provided with the mechanism causing the movement, for example with unbalance vibrators, or contain such mechanisms. If it is heavy enough, its own weight can exert the desired tractive force on the surface material.
  • the lower edge is formed by an elongate support which can be connected to the flexible surface material and which is connected or can be connected to at least one vertical support rod, the mechanism causing the movement (for example vibrator) is connected to the support rod in its part projecting beyond the surface of the earth and the support rod transmits the movement to the elongated support.
  • the sinking force can also be transmitted to the carrier via the support rod.
  • several supporting rods with a corresponding number of vibrators can be provided.
  • the carrier can on the support rod or the support rods after the sinking has ended and after the connection has been released from the surface material from the trench. In some cases it may also be easier to provide an inseparable connection between the carrier and the lower edge of the surface material, to leave the carrier in the trench and only to lift the support rod or support rods from the support once they have been released.
  • the so-called lower edge of the arrangement is formed by the lower edge of the sheet material, namely when this material as such forms the edge which moves downwards and moves relative to the clamp. This is the case when the traction and movement apparatus is accommodated within a pocket which forms the lower edge of the surface material.
  • the lower edge of the arrangement is formed by the traction and movement apparatus itself, for example the elongate support connected to the lower edge of the sheet material.
  • the relative movement is exerted as a vibration, it expediently lies in a frequency range of approximately 1-300 Hz.
  • Fig. 2 is a side end view of the
  • a trench 3 is introduced, which is filled with a thixotropic slug 4, which is indicated by dots and may consist of a bentonite slurry, possibly with cement additives.
  • a section 5 of a flexible surface material has already been introduced into the trench, for example of the type described in German patent application P 34 16 568, which consists of a polyethylene film of a few millimeters thick and has connecting profiles 6 on the vertical edges.
  • a carrier 10 is connected to the lower edge 9 of the sheet material in a manner not shown.
  • the rod forming the carrier 10 can, for example, be firmly or releasably clamped to the edge of the sheet material at a plurality of locations.
  • the carrier 10 is rigidly connected to a support rod 11 which protrudes from the trench 3 at the top and is in turn rigidly connected to a vibrator 12. With the progress of the depression process, the support rod 11 can be gradually extended, as indicated at 11 ', until the arrangement consisting of the sheet material 5,: " .
  • the carrier 10 and the support rod 11 to the desired depth in the trench 3 is sunk.
  • Devices (not shown) can be provided, which form a lateral holder for the support rod 11 and / or the vibrator 12.
  • the task of the carrier 10 is to apply a tensile force downward to the surface material 5 from the lower edge in order to pull it downward into the trench.
  • the weight of the arrangement and of the vibrator 12 can be sufficient to generate the tensile force.
  • the carrier 10 does no harm if the slurry solidifies again, because it does not significantly affect the friction on the smooth and cross-sectionally constant material 5.
  • the vibration exerted on the carrier 10 is also planted with the surface material 5 to a certain extent, so that the sludge adjacent to the surface material can also be liquefied to a certain degree.
  • the use of the device which draws the surface material into the trench from the lower edge has the advantage that there is a guarantee that the lower film edge actually reaches the intended depth in the trench. In the case of reliable groundwater protection, this is of crucial importance, especially since the depths of groundwater protection walls can be considerable.
  • the dimensions of the film sections to be introduced into the trench in the manner described are also correspondingly large. With a width of about 10 m, they have a length of, for example, 30-50 m.
  • the carrier 10 can be permanently connected to the support rod 11. In this case, it can either be provided that the devices 15 for connecting the carrier 10 to the lower edge 9 of the flexible sheet material 5 can be detached from the upper end of the support rod 11 by means not shown, as soon as the arrangement has reached the intended vertical position , or the carrier 10 and the parts of the support rod 11 which are inseparably connected therewith remain in the trench with the arrangement.
  • FIG. This consists of the flexible sheet material 16 closed at the bottom in a pocket-like manner and the traction and movement apparatus 17 arranged therein, which is designed as an elongated tube or as a sequence of tube sections in which an imbalance schematically indicated at 18 is shown Vibrator is arranged.
  • the apparatus 17 is located in the lower end of the pocket and, due to its weight, pulls it downward, while it liquefies the sludge in the vicinity due to the unbalance vibration. If the weight of the apparatus 17 is not sufficient for the train, a further lowering force (arrow) can be exerted via the support rod 11. After lowering, the apparatus 17 can be lifted out of the pocket again by means of the rod 11.
  • a carrier 10 of the type described with reference to FIGS. 1 and 2 is fastened from the outside to the lower edge 9 of the sheet material.
  • the fasteners are not shown in these figures. They are preferably of a remotely releasable type, so that the traction and movement apparatus can be detached from and recovered from the surface material after it has been countersunk.
  • a movement apparatus Arranged under the carrier 10 is in each case a movement apparatus, which in the example of FIG. 4 is formed by an expandable hose 19 which is closed at the ends and can be connected to a pressure source, which in the relaxed state has the cross-sectional shape shown with solid lines and when pressurized can stretch to the dot-dash position.
  • a pressure medium source From a pressure medium source, it is periodically pressurized with pressure medium and relaxed, so that its shape changes between the solid and dash-dotted lines.
  • the alternating swelling movement can lead to liquefaction of the sludge in the adjacent area.
  • it has the effect of displacing the surrounding sludge when the hose is stretched, thereby creating space for the lowering movement of the device during the subsequent shrinkage of the hose. Even if the sludge is not completely liquefied, a gradual lowering advance of the arrangement is made possible with little energy expenditure.
  • a sequence of aligned rollers 20 is mounted below the carrier 10 on the latter via bearing devices, not shown, which can be driven in rotation about an axis running parallel to the longitudinal direction of the carrier 10.
  • the rotation is liquefied by the rotational movement and the thrust forces exerted by the surface of the rollers on the surrounding slurry, thereby creating the prerequisite for the lowering movement of the arrangement.
  • the embodiment according to FIG. 6 has two rollers 21 beneath the carrier 10, which rotate in the opposite direction, in such a way that their outside moves from bottom to top in order to convey a force to the liquid at the same time as the slurry is liquefied Exercise from bottom to top.

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)
  • Revetment (AREA)

Abstract

Un procédé et un dispositif permettant de former une cloison verticale dans le sol (1) en enfonçant un matériau souple de surface (5) dans un fossé (3) rempli de boue thixiotrope (3). Le matériau de surface (5) est tiré dans le fossé (3) par un transporteur (10) connecté au bord inférieur (2) du matériau de surface. Afin d'obtenir une liquéfaction partielle de la boue thixotrope (4), le bord inférieur de l'agencement formé par le transporteur et par le matériau de surface est soumis à un mouvement relatif par rapport à la boue (4), par exemple à un mouvement vibratoire.
EP19850904420 1984-08-29 1985-08-29 Procede et dispositif d'enfoncement d'un agencement entourant un materiau souple de surface dans un fosse rempli de boue thixotrope Withdrawn EP0191849A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3431733 1984-08-29
DE19843431733 DE3431733A1 (de) 1984-08-29 1984-08-29 Verfahren und vorrichtung zum einsenken einer ein flexibles flaechenmaterial umfassenden anordnung in einen mit thixotroper schlemme gefuellten graben

Publications (1)

Publication Number Publication Date
EP0191849A1 true EP0191849A1 (fr) 1986-08-27

Family

ID=6244183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850904420 Withdrawn EP0191849A1 (fr) 1984-08-29 1985-08-29 Procede et dispositif d'enfoncement d'un agencement entourant un materiau souple de surface dans un fosse rempli de boue thixotrope

Country Status (3)

Country Link
EP (1) EP0191849A1 (fr)
DE (1) DE3431733A1 (fr)
WO (1) WO1986001553A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610949A1 (de) * 1986-04-02 1987-10-15 Dyckerhoff & Widmann Ag Verfahren zur herstellung einer schmalwand in erdboeden, sowie dazu dienende einrichtungen und elemente
DE3826869C2 (de) * 1988-08-08 1995-09-07 Bauer Spezialtiefbau Verfahren zum Herstellen einer Dichtungsmembran in einem Erdschlitz und Vorrichtung zur Durchführung des Verfahrens
DE4229941C2 (de) * 1992-09-08 1995-10-12 Bilfinger Berger Bau Verfahren zur Herstellung einer Dichtwand
DE4303742C1 (de) * 1993-02-09 1994-08-04 Keller Grundbau Gmbh Verfahren zur Entwässerung von Böden mit hohem Wasseranteil

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1105805B (de) * 1958-06-18 1961-04-27 Hans Lorenz Dr Ing Verfahren und Einrichtung zur Herstellung von Dichtungsschuerzen im Untergrund
DE1213802B (de) * 1960-06-08 1966-03-31 Hans Lorenz Dr Ing Eindringkoerper zur Herstellung einer Dichtungsschuerze im Untergrund
FR1469001A (fr) * 1965-12-08 1967-02-10 Soletanche Perfectionnements à la consolidation ou à l'étanchement des sols par injection
GB1297948A (fr) * 1969-03-21 1972-11-29
DE2138123A1 (de) * 1970-08-04 1973-02-08 Welzow Braunkohle Schachtbau Dichtungswand, vorzugsweise fuer abriegelungen im untergrund
DE2546946A1 (de) * 1975-10-20 1977-04-28 Eurosond Gmbh Spezialunternehm Verfahren zum herstellen einer dichtungsschlitzwand im untergrund
NL191153C (nl) * 1981-09-15 1995-02-16 Stevin Volker Beton Water Werkwijze voor het vervaardigen van een de stroming van grondwater beperkend scherm in de grond alsmede vel en lans voor toepassing bij deze werkwijze.
NL8200466A (nl) * 1982-02-08 1983-09-01 Stevin Volker Beton Water Werkwijze voor het vervaardigen van een de stroming van grondwater afsluitend scherm.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8601553A1 *

Also Published As

Publication number Publication date
DE3431733A1 (de) 1986-03-13
WO1986001553A1 (fr) 1986-03-13

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Inventor name: HAMMER, HEINER, I.