EP0509385A1 - Procédé pour la fabrication de corps en béton et de corps en ciment dans le sol - Google Patents

Procédé pour la fabrication de corps en béton et de corps en ciment dans le sol Download PDF

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Publication number
EP0509385A1
EP0509385A1 EP92106097A EP92106097A EP0509385A1 EP 0509385 A1 EP0509385 A1 EP 0509385A1 EP 92106097 A EP92106097 A EP 92106097A EP 92106097 A EP92106097 A EP 92106097A EP 0509385 A1 EP0509385 A1 EP 0509385A1
Authority
EP
European Patent Office
Prior art keywords
injection
sheet pile
columns
concrete
reinforcement
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.)
Granted
Application number
EP92106097A
Other languages
German (de)
English (en)
Other versions
EP0509385B1 (fr
Inventor
Albert Pielsticker
Veiko Warrelmann
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.)
Keller Grundbau GmbH
Original Assignee
Keller Grundbau 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 Keller Grundbau GmbH filed Critical Keller Grundbau GmbH
Priority to AT92106097T priority Critical patent/ATE103026T1/de
Publication of EP0509385A1 publication Critical patent/EP0509385A1/fr
Application granted granted Critical
Publication of EP0509385B1 publication Critical patent/EP0509385B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
    • 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
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/24—Placing by using fluid jets

Definitions

  • the invention relates to a method for producing wall-shaped or ceiling-shaped concrete or cement bodies in the floor, in which injection columns or vibrating columns, which are at least tangent to one another, are created one after the other and, after curing, the wall-shaped or ceiling-shaped concrete or cement body in the floor (floor body) form whereby at least one group of adjacent injection columns is created fresh-in-fresh before the binding of individual columns with mutual penetration.
  • the overall wall-shaped body can be generated in any inclined position between vertical and horizontal and also to several z. B. be arranged in a desk or gable shape.
  • the injection columns are made of cement suspension in parallel with one another in the nozzle jet method by means of an injection rod with at least one nozzle which is driven into the ground;
  • the vibrating columns are made of precast concrete in parallel with one another by means of a deep vibrator that is driven into the ground. After creating an injection or vibrating column, the injection rod or deep vibrator is pulled again.
  • the present invention has for its object to provide a method for producing wall or ceiling-shaped concrete or cement bodies, which enables the easy insertion of sheet pile elements or reinforcement elements.
  • sheet piling or reinforcement elements are each sunk individually within an injection column at the same time with an injection rod, and each remain in the injection column when the injection rod is pulled.
  • This advantageously saves a separate operation for lowering the sheet pile elements or the reinforcement elements. It is particularly advantageous that they can be brought down in the manner according to the invention in a completely vibration-free manner in the nozzle jet process. Since the sheet pile wall elements only have to be gripped and guided laterally, it can be brought down directly in front of the wall, ie directly on a structure to be supported. Reinforcement cages are operated with much lower forces than required when bringing them down into a concrete or cement column that has already been created.
  • the forces act as tensile forces so that there is no fear of the reinforcement elements buckling.
  • the drilling and injection process can be done in several steps, with the last injection step according to the invention of the sheet pile or reinforcement element is sunk with the injection rod.
  • an injection pressure of approximately 200-400 bar is preferably used for the concrete or cement suspension.
  • the volume flow can be more than 90 l / min.
  • the orientation of the at least one nozzle is essentially perpendicular to the axis of the injection rod. It can be used to create columns with a radius between 50 to 250 cm.
  • the method of operation of this method is that the soil is transferred into the suspension, a liquid phase of new composition being formed. It is therefore a soil erosion and suspension process that must not be equated with drilling mud processes for discharge from the drillings.
  • a second solution is that sheet piling or reinforcement elements are sunk simultaneously with a deep vibrator, either individually or in groups, with the deep vibrator parallel to its longitudinal axis, which remain in the ground parallel to the resulting concrete vibrating column when the deep vibrator is pulled.
  • reinforcement elements will be partially integrated into the resulting concrete body.
  • the method described here is of course not vibration-free, but can also be carried out directly in front of the wall with a suitable design of the corresponding device and also ensures that the reinforcement elements are brought down without compressive forces, which prevents the reinforcement elements from buckling.
  • the sheet pile or reinforcement elements can be axially lowered are constantly loaded, in particular by means of cable pulling means acting on the drill head slide of a drill or injection rod or the guide slide of a deep vibrator.
  • the tractive force is particularly variable during the lowering depending on the nature of the ground and sinking speed.
  • the sheet piling or reinforcement elements can be axially and possibly laterally shaken when sunk, in particular by means of a top vibrator or top impact tool placed thereon.
  • the sheet pile or reinforcement elements are held and guided at their upper end in a tensioning device with suitable means and are guided underneath in a different way for a second time.
  • the upper guide and tensioning device is fastened to the drilling or injection head of the injection rod or to the guide and mounting slide of the deep vibrator and moves with them in each case.
  • the lower guide device can be fixed in place like a guide of the injection linkage on the drill or as a guide and mounting device directly on the deep vibrator and can be lowered with it.
  • the vibrator tip or the nozzle holder of the injection rod is at a distance of 0.1 to 1.5 m, preferably 0.3 to 0.5 m in the direction of advance in front of the front edge of the respective sheet pile element or reinforcement element, so that the element in the area of freshly injected column or vibrated opening is inserted.
  • the clamping on the tensioning device is released so that the respective sheet pile element or reinforcement element remains in the column just created.
  • the reinforcement elements can be known baskets, profiles or sheet piling elements that are permanent remain in the concrete or cement body, while the sheet piling elements can be pulled again after all floor work has been completed.
  • the profile locks of the sheet pile elements to be lowered in each case of newly created columns can be latched into the columns of the already completed adjacent sheet pile wall elements of already finished columns.
  • these profile locks can be protected, for example, from a previous grease filling against the ingress of cement or soil.
  • sheet pile wall elements are inserted individually into a part of the pillars or used in groups with their profile locks, if this is sufficient for the desired strength.
  • a favorable procedure which leads to economical use of concrete or cement suspension consists in that at least the injection columns provided with sheet pile wall or reinforcement elements are created with a circular sector cross section.
  • This cross-section can accommodate the elements mentioned symmetrically and approximately in the middle.
  • the circle sector can be of the order of 180 °. It is also possible to have two smaller circular sectors lying opposite one another.
  • two or more pre-assembled sheet piling profiles can be brought down together with it.
  • At least groups of injection or vibrating columns are created fresh-in-fresh, the above-mentioned latching of the profile locks being possible without further ado. It comes due to interruptions in work or for other reasons to a column connection freshly tied, in a first preferred embodiment at the joint of the resulting wall parts additional columns have to be created for reinforcement, which can be attached to the wall parts on one or both sides.
  • Another or additional option is to use a suspension that can be freshly tied to a column connection by a sheet pile wall or reinforcement element of a new column in the area of the profile lock of a sheet pile wall or reinforcement element of an already set column, e.g. one with little Cement or with concrete or retarder.
  • the sheet pile or reinforcement element is connected to a non-rotating part of the injection rod during the sinking and an injection head with the injection nozzle or nozzles is driven to rotate or pivot relative to this configuration.
  • the reinforcement element can be lowered without excessive resistance, while the injection column is created in the desired cross-sectional shape.
  • a suitable one The device for carrying out the above-mentioned method is characterized in that an injection rod made up of a plurality of nested tubes has an outer non-rotating part to which the guiding and intercepting devices for holding the sheet pile and reinforcing element are attached, and a part that does not rotate relative to the latter Includes rotating or pivotally drivable injection head.
  • this can be connected in a rotationally fixed manner to an inner part of the injection rod, which in turn is driven in a corresponding manner by the drill head in a rotating or pivoting manner.
  • the injection head can, however, also consist of several parts, with a holder being connected in a rotationally fixed manner to any part of the injection linkage located outside or inside, and a nozzle support part which can be driven in rotation or pivoting is provided, the movement of which is generated by a pressure medium.
  • This pressure medium can in particular be water which is supplied via one of the channels formed by the plurality of tubes lying one inside the other. The pressure medium can leave the nozzle carrier essentially without pressure.
  • the additional amount of liquid is then to be taken into account in the composition of the suspension added to the drill head via another of the channels. It is also possible to return the pressure medium in a further one of the channels formed by the tubes lying one inside the other up to the drill head and let it exit there. An influence on the suspension is avoided.
  • the individual injection columns or vibrating columns can be created purely linearly, but also with drill pipe or vibrator positions jumping towards each other in a zigzag shape. Curved or semicircular courses of the column lines, through which vault effects can be achieved, can also be particularly favorable. Further details emerge from the drawings, in which some exemplary embodiments are described below.
  • FIGS. 1a to 1c parts that correspond to one another are assigned the same numbers.
  • a caterpillar vehicle 1 with a drilling rig 2, a drilling and injecting head 3 and a guiding and intercepting device 4 is symbolically recognizable.
  • FIG. 1a a sheet pile wall element 6 is pulled with one end in the direction of the drilling and injecting head 3 over a symbolically illustrated winch rope 5.
  • a clamping device 7 On the drilling and injecting head 3 there is a clamping device 7 to be described in more detail and on the drilling stand 2 below a known guiding and intercepting device 8 for the drilling and injecting rods.
  • the sheet pile wall element 6 has been transferred into a vertical position via the winch cable 5 and has been inserted from below or laterally into the tensioning device 7 and the guide device 8.
  • the lower end of the drilling and injecting rod 9 stands on the floor, while the lower edge of the sheet pile element, on the other hand, stands back slightly in the vertical working direction.
  • the drilling and injection linkage 9 has already been partially lowered into the ground, a cutting beam 10 acting and thereby creating a bottom opening 11.
  • the drilling and injecting head 3 is pulled downwards via a winch arrangement (not shown in detail) together with the tensioning device 7 in the drilling frame 2, while the guiding and intercepting devices 4 and 8 are recognizably stationary.
  • FIG 1d the end position of the drilling and injection rod 9 and the sheet pile element 6 is shown.
  • the floor opening 11 is filled with a cement-floor mixture 12.
  • the suspension used can form the cutting jet itself or can be fed through the drilling and injection rod independently of a cutting jet of water via a further nozzle.
  • the tensioning device 7 will have to be released. If the drilling and injection head 3 with the When the drilling and injection rods 9 are withdrawn into the position a via the positions in FIGS. B and c, the sheet pile wall element 6 remains in its position, whereupon it still sags vertically - held by the guiding and intercepting device 8.
  • the caterpillar vehicle can now be moved laterally and a further process of the same type can be started, the floor openings 11 cutting and the profile locks of adjacent sheet pile elements being inserted into one another.
  • FIGS. 2a to 2c parts which correspond to one another are assigned the same numbers, which correspond to those in FIGS. 1a to 1c again.
  • a crawler vehicle 1 with a drilling stand 2, a deep vibrator 32 and a vibrating stand 2 can be seen in each case.
  • a sheet pile wall element 6 is pulled with one end in the direction of the upper end of the deep vibrator 32 via a winch rope 5.
  • a clamping device 7 to be described in more detail is arranged at the lower end of the vibrating frame 2, a known guiding device 24 and at the lower part of the deep vibrator a guiding device 26.
  • the sheet pile wall element 6 has been transferred into a vertical position via the winch cable 5 and has been inserted from below or laterally into the tensioning device 7 and into the guide device 26.
  • the lower end of the deep vibrator 32 stands on the floor, while the lower edge of the sheet pile element 6, on the other hand, stands back in the vertical working direction.
  • the deep vibrator 32 has already been partially vibrated into the ground, the sheet pile element advancing parallel to the deep vibrator guided over the guide device.
  • FIG. 2d The end position of the deep vibrator 32 and the sheet pile element 6 is shown in FIG. 2d.
  • the latter is located laterally in the bottom opening 31.
  • the tensioning device 7 After loosening the tensioning device 7, the deep vibrator 32 is now pulled while filling in cement suspension or concrete and thus filling the borehole 31, the sheet pile wall element being provided with a laterally sealing position for this purpose. If a reinforcement body with perforations is used instead of the sheet pile wall element, the reinforcement element is integrated into the resulting column.
  • the drilling head 3 with the drilling and injection rod 9 is shown in cross section without the connection to the slide, the clamping device 7 with a sheet pile element 6 held therein being shown systematically.
  • This consists of a U-profile 13 with two claw parts 14, 15 fastened at the ends and pivotable as well as a support plate 16 for the sheet pile element 6.
  • the size of the U-profile and the claws attached to it is such that the corresponding profile when the claws are open 14, 15 can be inserted laterally and can be held by the claws with support on the support plate 16.
  • the sheet pile section 6 can also be held in the clamping device 7 in a position rotated by 180 °.
  • the guide devices 8 and 26 are constructed in principle in the same way, but without a fixed clamping, but so that a guide with play is created.
  • FIG. 4 the drilling head 3 with the drilling and injection linkage 9 is shown in cross section in the same way as in FIG. 3, the tensioning device 7 ′ being shown systematically with a sheet pile element held therein.
  • the cross section consists of a symmetrical guide piece 33 and therein cross-movable claws 14 ', 15', into which a sheet pile element 6 can be inserted laterally and can be clamped by the movable claws with support on a support plate 16 '.
  • the claws engage in side walls of the sheet pile wall element so that they can be brought down sliding along the edge of the building with the free legs of the U-profile. This will bring your distance to the development to zero.
  • FIG. 5a shows a cross section through a column which can be seen in its position in relation to the drill head 3 and the drill pipe 9 and which was created by a nozzle jet covering only an angle of somewhat more than 180 °.
  • Drill head 3, linkage 9 and support plate 16 lie above the cutting plane and are shown in dashed lines.
  • the sheet pile wall profile 6 is set in reverse relative to that from FIG. 2 against the support plate 16.
  • the holding claws, not shown, would accordingly be used in a modified form.
  • the bottom opening 11 with the suspension 12 can reach as underpinning under a building edge 17 shown in dashed lines.
  • FIG. 5b it can be seen how along the edge of the building 17 in a row floor bodies 11 according to Figure 3a and circular floor bodies 18 according to the usual SOILCRETE method with a circumferential jet or in pure injection technology in a specific arrangement in a row. Only the floor elements 11 accommodate the sheet pile elements 6 mentioned for reinforcement or as reinforcement. Two of the floor bodies 18 alternate with one of the floor bodies 11.
  • the axial distance "x" between two floor bodies 11 of the first type is, for example, approximately 200 cm if the width b, according to FIG. 5a, is approximately 100 cm.
  • the protrusion from the edge of the building to the front edge of the sheet pile wall profile is denoted by “y” (eg 40 cm)
  • the protrusion of the pillar body itself from the edge of the building 17 is denoted by “z” (eg 50 cm).
  • FIG. 5c shows how along the edge of the building 17 floor elements 11 according to FIG. 5a and circular floor elements 18 are assembled in a curved line to form a vertical barrel vault according to the usual SOILCRETE method. Only the floor elements 11 have sheet pile elements 6 as reinforcement.
  • the axial grid dimension "x" between two floor bodies 11 of the first type can be of the order of 200 cm, as shown in FIG. 5b.
  • first floor body 19 with an opening angle of approximately 90-120 ° and a radius r 1 and second floor body 20 with an opening angle ⁇ of approximately 200 ° and a radius r 2 are alternately arranged to each other so that each is oppositely oriented Sheet piles with their profile locks, which lie on a line 21, are locked together.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Piles And Underground Anchors (AREA)
  • Artificial Fish Reefs (AREA)
EP92106097A 1991-04-10 1992-04-09 Procédé pour la fabrication de corps en béton et de corps en ciment dans le sol Expired - Lifetime EP0509385B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT92106097T ATE103026T1 (de) 1991-04-10 1992-04-09 Verfahren zum herstellen von beton- und zementkoerpern im boden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4111604 1991-04-10
DE4111604A DE4111604A1 (de) 1991-04-10 1991-04-10 Verfahren zum herstellen von beton- und zementkoerpern im boden

Publications (2)

Publication Number Publication Date
EP0509385A1 true EP0509385A1 (fr) 1992-10-21
EP0509385B1 EP0509385B1 (fr) 1994-03-16

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EP92106097A Expired - Lifetime EP0509385B1 (fr) 1991-04-10 1992-04-09 Procédé pour la fabrication de corps en béton et de corps en ciment dans le sol

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EP (1) EP0509385B1 (fr)
AT (1) ATE103026T1 (fr)
DE (2) DE4111604A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2113226A2 (es) * 1991-11-13 1998-04-16 Sicapi Italiana Spa Mejoras en el objeto de la patente p 9201168, por "sistema para realizar diafragmas de espesor constante en terrenos a consolidar y similares.

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4229940C2 (de) * 1992-09-08 1998-07-02 Bilfinger Berger Bau Verfahren und Vorrichtung zum Einbringen und Erstellen von Verbauelementen
DE4312231C2 (de) * 1993-04-14 2002-01-31 Bilfinger Berger Bau Verfahren und Vorrichtung zur Herstellung von flächigen Bauelementen im Boden
DE29509386U1 (de) * 1995-06-08 1995-08-24 Stange, Ulrich, 42105 Wuppertal Injektionslanze zum Einpressen von Injektionskörpern in das Erdreich
DE19524775B4 (de) * 1995-07-07 2013-09-05 Bilfinger SE Vorrichtung zum Herstellen einer Schmalwand
DE19538764A1 (de) * 1995-10-18 1997-04-24 Ursel Ramm Vorrichtung und Verfahren zum Setzen von Trägern und dergleichen
DE19721361C2 (de) * 1997-05-22 2001-01-04 Zueblin Ag Verfahren zur Herstellung von Pfählen und solchermaßen hergestellte Pfähle
DE19953819A1 (de) * 1999-11-09 2001-05-10 Zueblin Ag Kombination aus HDI-Verfahren und Bodenvereisung zur Herstellung von Dichtwänden
DE10219862B4 (de) * 2002-05-03 2005-07-14 Bauer Spezialtiefbau Gmbh Verfahren und Tiefbauvorrichtung zur Herstellung einer Gründungssäule in einem Boden
PL2728071T3 (pl) 2012-11-05 2016-05-31 Keller Holding Gmbh Sposób i urządzenie do wytwarzania ścianowych elementów gruntowych

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BE627142A (fr) *
FR1405651A (fr) * 1964-08-10 1965-07-09 Typenprojektierung Bei Der Deu Procédé et dispositif pour mettre en place des palplanches de béton armé par remblayage hydraulique
GB1441473A (en) * 1974-01-23 1976-06-30 Soil Mechanics Ltd Contiguous bored pile walls
FR2341014A1 (fr) * 1976-02-16 1977-09-09 Ccp Italia Spa Procede pour consolider des terrains par injection de liquides dans le sous-sol, et moyens relatifs de mise en oeuvre
DE3415738A1 (de) * 1984-04-27 1985-10-31 Gkn Keller Gmbh, 6050 Offenbach Verfahren zum herstellen von gruendungen, insbesondere pfahlgruendungen

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DE2236901A1 (de) * 1971-08-04 1973-02-22 Rella & Co Bauges Vorrichtung zur herstellung von ortbetonpfaehlen oder schmalwaenden
DE2208616A1 (de) * 1972-02-24 1973-09-06 Herbert Dahlhaus Verfahren zum niederbringen von spundbohlen in wechselseitiger anordnung unter bildung von spundwaenden
JPS54155607A (en) * 1978-04-06 1979-12-07 Hisaharu Nakashima Method of pile driving construction to base rock
DE2907587A1 (de) * 1979-02-27 1980-08-28 Nt Ob Gorsistemotechnika Verfahren und anlage zur herstellung von ortpfaehlen
DE3002680A1 (de) * 1980-01-25 1981-07-30 Gkn Keller Gmbh, 6050 Offenbach Verfahren und vorrichtung zur herstllung von unterfangungskoerpern unter fundamenten oder von abdichtungsmembranen
FR2517717A1 (fr) * 1981-12-09 1983-06-10 Soletanche Armature de paroi moulee continue, procede de realisation d'une telle paroi, dispositif pour la mise en oeuvre de ce procede et paroi moulee comportant l'armature
DE3644793A1 (de) * 1986-12-31 1988-07-14 Gkn Keller Gmbh Verfahren zum herstellen einer gruendung durch einbinden eines fertigteils, insbesondere einer stuetze, in einen ortfuss
GB8707116D0 (en) * 1987-03-25 1987-04-29 Serf Ltd Sheet piling
DE3831547A1 (de) * 1988-09-16 1990-03-22 Bauer Spezialtiefbau Verfahren zur herstellung einer moertelsaeule im erdreich
DE3941641C1 (en) * 1989-12-16 1991-03-21 Dyckerhoff & Widmann Ag, 8000 Muenchen, De Drive unit for foundation I beams - has ground drills within beams, retrieved after beams are properly installed
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Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
BE627142A (fr) *
FR1405651A (fr) * 1964-08-10 1965-07-09 Typenprojektierung Bei Der Deu Procédé et dispositif pour mettre en place des palplanches de béton armé par remblayage hydraulique
GB1441473A (en) * 1974-01-23 1976-06-30 Soil Mechanics Ltd Contiguous bored pile walls
FR2341014A1 (fr) * 1976-02-16 1977-09-09 Ccp Italia Spa Procede pour consolider des terrains par injection de liquides dans le sous-sol, et moyens relatifs de mise en oeuvre
DE3415738A1 (de) * 1984-04-27 1985-10-31 Gkn Keller Gmbh, 6050 Offenbach Verfahren zum herstellen von gruendungen, insbesondere pfahlgruendungen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2113226A2 (es) * 1991-11-13 1998-04-16 Sicapi Italiana Spa Mejoras en el objeto de la patente p 9201168, por "sistema para realizar diafragmas de espesor constante en terrenos a consolidar y similares.

Also Published As

Publication number Publication date
DE4111604A1 (de) 1992-10-15
ATE103026T1 (de) 1994-04-15
EP0509385B1 (fr) 1994-03-16
DE59200085D1 (de) 1994-04-21

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