EP0258905A1 - Verfahren und Vorrichtung zum Auskleiden und Sichern eines im Schildvortrieb ausgefahrenen, unterirdischen Hohlraumes - Google Patents

Verfahren und Vorrichtung zum Auskleiden und Sichern eines im Schildvortrieb ausgefahrenen, unterirdischen Hohlraumes Download PDF

Info

Publication number
EP0258905A1
EP0258905A1 EP87112927A EP87112927A EP0258905A1 EP 0258905 A1 EP0258905 A1 EP 0258905A1 EP 87112927 A EP87112927 A EP 87112927A EP 87112927 A EP87112927 A EP 87112927A EP 0258905 A1 EP0258905 A1 EP 0258905A1
Authority
EP
European Patent Office
Prior art keywords
shield
injection
soil
surrounding
lining
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Withdrawn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
EP87112927A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jürgen Dipl.-Ing. Faltin
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.)
Strabag Bau AG
Original Assignee
STRABAG BAU - AG
Strabag Bau AG
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 STRABAG BAU - AG, Strabag Bau AG filed Critical STRABAG BAU - AG
Publication of EP0258905A1 publication Critical patent/EP0258905A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001—Improving soil or rock, e.g. by freezing; Injections
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
    • E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
    • E21D9/0873—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines the shield being provided with devices for lining the tunnel, e.g. shuttering

Definitions

  • the invention relates to a method and a device for lining and securing a subterranean cavity which has been opened in shield driving and in which a flowable, hardening mass is injected into the mountains surrounding the cavity.
  • Prefabricated segments made of reinforced concrete or steel are mostly used for lining and securing tunnels and tunnels, which are then installed one after the other in close proximity to the shield tail under the protection of the shield tail.
  • the tubbing must be brought from the surface through the entire tunnel or gallery, which has now been completed, and then first set up and attached to the last tubbing installed.
  • the longitudinal transport of the tubbings through the completed tunnel takes up a lot of space and hinders the removal of the pile detached from the face.
  • the excavation cross-section must always be slightly larger than the outer circumference of the tunnel lining, so that correspondingly large shields are also required.
  • tunnel or tunnel lining in in-situ concrete, which is placed in a formwork which limits the inner surface of the tunnel lining and must be stiffened accordingly.
  • the fresh concrete for the tunnel lining can be transported through pipelines, but the excavation cross-section here also depends on the outer circumference of the tunnel lining.
  • the object of the invention is to simplify the manufacture of the lining of tunnels and tunnels excavated in shield driving and to reduce the excavation cross section.
  • This object is achieved with the invention by a method in which the soil surrounding the shield is mixed at least over a part of the shield length from the shield in such a thickness with the hardening mass that it forms the load-bearing lining of the open cavity after hardening .
  • Such a method has the advantage that the surrounding mountains, especially rolling soils, such as sand or gravel mixtures, which can also be interspersed with larger stones and cohesive constituents, in place in the load-bearing part, namely in the lining of the tunnel to be created or Stollens, is converted.
  • This not only eliminates considerable material transport for the lining, such as fresh concrete or tubbings, but also the excavation cross-section is considerably smaller, since the finished tunnel lining then lies outside the shield casing and not inside, as is the case with lining segments or in-situ concrete.
  • a cement suspension is expediently used as the hardening mass, to which bentonite can also be added and which is injected under high pressure into the soil surrounding the shield.
  • the introduction of the suspension under high pressure causes the surrounding soil to be cut open and moved as if with a knife, whereby it mixes intimately with the injected suspension.
  • the cement suspension is pressed into the soil surrounding the shield jacket with such high pressure and speed that there is any water present there cannot be slowly displaced into cavities farther away and part of the soil that is displaced by the injected cement suspension must also be removed.
  • excess material is removed from the lining area produced in each case through openings in the shield or in a formwork following it, collected and passed on for days.
  • the hardening mass is expediently prepared for days, conveyed to the shield and passed through it into the surrounding earth.
  • a device for lining a subterranean cavity that has been excavated in the shield drive which consists of a shield and a formwork that surrounds the exposed cavity or shielding expansion elements that adjoins the shield, and that can be used to carry out the method according to the invention, is on the shield attached devices for injecting a hardening Mass characterized in the soil surrounding the shield, either the injection devices or special devices for mixing this soil with the hardening mass are suitably attached to the outside of the shield.
  • the injection device is expediently a high-pressure injection device for cement suspension, which has injection nozzles for the hardening mass.
  • the cement suspension can be continuously pressed into the soil surrounding the tail of the shield according to the shield advance.
  • openings for the drainage of excess soil and consolidation material are arranged in the shield, which are closed by pressure valve closures. These closures open as soon as the pressure in the soil outside the shield jacket exceeds a predetermined value. They then allow water, soil material and / or cement suspension to enter the interior of the cavity, where these excess amounts are collected and, appropriately separated from the excavated material detached from the face, are conveyed over days.
  • the injection nozzles are arranged in the walls of injection tubes, which pivot about their longitudinal axes on the outside of the shield jacket approximately parallel to its generatrix are stored in cash.
  • This configuration has the advantage that the working space in the shield is practically not restricted and that a relatively large injection space can be reached in the circumferential direction of the shield from each injection tube. So that the injection tubes do not form any additional resistance when propelling the shield, they are expediently housed in depressions in the shield shell.
  • the injection nozzles can be arranged in a ring arranged on the outside of the shield jacket and rotatable about the longitudinal axis of the shield. It is then sufficient to accommodate relatively few injection nozzles in the ring and to bring the nozzle outlet openings to all parts of the shield circumference by rotating the ring in order to achieve a good mortaring of the soil surrounding the shield jacket.
  • a rotatingly driven mixing and milling disc or worm can be arranged on the outer circumference of the shield, the mixing and milling blades of which have a radial expansion that corresponds to the desired outer circumference of the lining and which carry the injection nozzles for the hardening mass.
  • injection lances can be provided which can be moved approximately radially outwards and inwards in the shield casing and which carry injection nozzles at their ends which protrude into the surrounding earth. These injection lances are then first pressed into the surrounding soil from the shield casing until they have approximately reached the outer contour of the lining to be produced. Then you inject suspension for injection the nozzles arranged at the end of the injection lances, which sets the surrounding soil in motion and mixes with the earth's masses, while the injection lances are slowly withdrawn again. The openings for the drainage of excess soil and consolidation material surround the injection lances in a ring, so that this excess material can enter the interior of the tunnel along the injection lances and be removed there.
  • a plurality of injection lances are expediently arranged next to one another in the longitudinal direction of the shield in such a way that the lances which are adjacent to the injection jets and which are mixed with the injection mortar, overlap and solidify and form a coherent lining shell.
  • high pressure injection with lances for the production of earth piles or foundation bodies arranged deep in the earth is known per se (brochure "High Pressure Injection HDI" from Karl Bauer Spezialtiefbau GmbH & Co. KG).
  • the discharge openings for the excess soil material can be connected to a discharge ring line and the injection nozzles can be connected to an inflow ring line inside the shield, which in turn is then connected to a delivery line or to a suspension feed line.
  • 10 denotes a cavity, for example a tunnel with a circular cross section, which is driven up in shield driving in rolling mountains 11, which consists for example of coarse gravel-sand mixtures.
  • the tunnel 10 is driven from a shaft 12 in which the feed line 13 and the delivery line 14 for the tunneling, a suspension line 15 for a cement suspension and a return line 16 for water and excess soil material are guided from underground to underground.
  • the tunneling shield 18 In front of the face 17 is the tunneling shield 18, which can be an open shield, a compressed air shield or hydro shield, but also a knife shield. In the illustrated embodiment, it has a cutting wheel 19 in the cutting area for loosening the soil material in the area of the working face 17 in full section.
  • the excavated material is slurried with water and conveyed through the conveying line 14 into a separating system arranged above ground, which is designated 20 in its entirety. There, the solids are separated in a collecting container 21, while the conveying liquid is fed back through the feed line 13 to the face 17 for propulsion.
  • the feed presses 22 for the shield which are supported towards the rear against the last formwork element 23a of a walking formwork 23, which is arranged in the tunnel space 10 behind it.
  • the formwork element 23a is overlapped by the shield tail 24, which is sealed at its rear edge with a suitable sealing lamella 25 against the formwork 23.
  • An injection device 26 for injecting a hardening mass into the soil 27 surrounding the shield is arranged in the region of the shield tail 24.
  • this injection device 26 consists of a large number of injections distributed over the circumference of the shield jacket 28 nozzles 30, all of which are connected to an inflow ring line 31, which is located inside the shield 18 and to which the suspension line 15 is connected.
  • the injection nozzles 30 in the shield jacket are arranged radially and obliquely in the direction of advance and obliquely against the direction of advance 32.
  • This drain line 16 leads into a separating tank 36, where liquid constituents are separated and the solid constituents are conveyed through a line 37 to a suitable landfill.
  • a processing plant for the production of a cement suspension is located above ground and is designated 38 in its entirety.
  • the cement is fed from a cement silo 39 via a balance 40 into a mixer 41, into which water is simultaneously added from a container 42 and, if desired, bentonite is also added from a weighing funnel 43 to improve the processability.
  • Cement, water and possibly bentonite are mixed thoroughly in the mixer 41 and pass through a storage container 44 into the suspension line 15, which leads to a high-pressure pump 45.
  • the cement suspension is passed through the high-pressure line 15b into the inflow ring line 31 and from there into the injection nozzles 30, through which the suspension is pressed into the earth space 27 surrounding the shield jacket 28 under high pressure.
  • the pressure generated by the high pressure pump 45 is between 300 and 700 bar.
  • the cement suspension pressed out under this high pressure by the injection nozzles 30 sets the soil surrounding the shield jacket in motion and mixes intensively with it, filling all cavities and pressing the ground water contained in the soil through the outlet openings 33 into the outlet ring lines 35.
  • the cement suspension forms here, together with the rolling soil surrounding the shield casing, a concrete shell, which then hardens and forms the lining of the opened cavity 10, which supports it against the rock pressure.
  • the rearmost formwork element 23b of the formwork 23 can then be removed and brought forward into the area of the shield tail 24 after the shield 18 has been advanced by the length of a formwork element 23a or 23b.
  • the injection nozzles 30 are arranged at such a distance from one another in the circumferential direction that the suspension jets emerging from them overlap and as a result the soil is mixed and solidified over the entire circumference of the shield jacket 28.
  • the procedure according to the invention is such that the shield 18 is first driven by the length of a formwork element 23a or 23b.
  • the rearmost formwork element 23b is then moved forward into the area of the shield tail 24 and the earth space 27 surrounding the shield jacket 28 in the region of the shield tail 24 is solidified with cement suspension, which is pressed into the surrounding earth 27 by the injection nozzles 30.
  • the shield 18 is then advanced further.
  • the injection nozzles 30 are arranged in the walls 49 of injection tubes 50, which pivot about their longitudinal axes in depressions 51 on the outside of the shield jacket 28 are stored in cash.
  • the outflow openings 33 for discharging the excess soil material are located between these injection pipes 50.
  • all injection pipes 50 can be connected to an inflow ring line, which is not shown in the drawing, however.
  • the injection nozzles 30 are arranged in a rotatable ring 52, which is rotatable on the outside of the shield jacket 28 in a recess about the longitudinal axis of the shield 18. Since the rotatable ring 52 takes up a little more space, the pre-press cylinders 22 are set somewhat inwards and are supported on inwardly projecting brackets 54 of a formwork element 55 which is pulled forward together with the shield 18. The formwork element 23a brought forward is then installed immediately behind the element 55.
  • the ring 52 in the shield 18 can be rotated through 360 °, only a few injection nozzles 30 need to be arranged on its circumference, which mix and solidify the part of the base lying in the region of the shield tail with cement suspension when the ring is rotated fully.
  • a rotatable ring 52 is also arranged on the outer circumference of the shield shell 28, which carries a mixing and milling disk or worm 56.
  • the mixing or milling blades 57 of this milling disk 56 have a radial dimension d which corresponds to the desired outer circumference 58 of the lining 60.
  • the injection nozzles 30 are arranged in the mixing blades 57 of the mixing screw 56, through which the cement suspension is pressed under high pressure into the soil 27 surrounding the shield jacket 28, the nozzles being directed towards the rear.
  • FIGS. 9 and 10 Another embodiment is shown in FIGS. 9 and 10, which is designed somewhat differently than the previous ones.
  • a large number of injection lances 63 are arranged distributed over the circumference of the shield jacket 28, which are staggered in two rows one behind the other in the longitudinal direction of the shield.
  • the injection lances 63 are rotatably and axially displaceably guided in the shield jacket 28 and can be moved radially into the soil 27 surrounding the shield jacket 28 and pulled back into the interior of the shield. They have 62 injection nozzles 30 at their outer ends, which are located on radially opposite sides and through which the suspension liquid is pressed out.
  • the injection lances 63 can be rotated about their longitudinal axis.
  • the openings 33 for the discharge of excess soil and solidification material surround the injection lances 63 in a ring shape, so that the excess material exits along the lances into the interior of the cavity to be opened, where it or the like in suitable channels. can be collected, which are not shown in the drawing.
  • the shield 18 can be driven continuously while at the same time cement suspension is injected into the soil surrounding the shield jacket 28 under high pressure, in the embodiment according to FIGS. 9 and 10 the shield 18 must be stopped when the solidification of the surrounding the shield mantle.
  • the injection lances 63 are first pushed one by one into the ground as far as the thickness of the lining shell to be produced. Then, while cement suspension is sprayed under high pressure from the openings 30 of the injection lance 63, this lance 63 slowly withdrawn in the radial direction into the interior of the shield 18, the emerging cement suspension cutting open the surrounding soil, circulating and mixing with the soil, while excess material emerges inwardly through the ring opening 33 surrounding the lance.
  • the shield can be advanced further and the last formwork element 23b can be moved forward.
  • the invention is not limited to the exemplary embodiments shown and described, but several changes and additions are possible without leaving the scope of the invention.
  • the excess material accumulating during the consolidation of the soil surrounding the shield, as well as the pile detached from the face can also be conveyed to the shaft by conveyor belts or wagons and from there to the surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Soil Sciences (AREA)
  • Civil Engineering (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
EP87112927A 1986-09-05 1987-09-04 Verfahren und Vorrichtung zum Auskleiden und Sichern eines im Schildvortrieb ausgefahrenen, unterirdischen Hohlraumes Withdrawn EP0258905A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3630240 1986-09-05
DE19863630240 DE3630240A1 (de) 1986-09-05 1986-09-05 Verfahren und vorrichtung zum auskleiden und sichern eines im schildvortrieb aufgefahrenen, unterirdischen hohlraumes

Publications (1)

Publication Number Publication Date
EP0258905A1 true EP0258905A1 (de) 1988-03-09

Family

ID=6308972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87112927A Withdrawn EP0258905A1 (de) 1986-09-05 1987-09-04 Verfahren und Vorrichtung zum Auskleiden und Sichern eines im Schildvortrieb ausgefahrenen, unterirdischen Hohlraumes

Country Status (3)

Country Link
EP (1) EP0258905A1 (enrdf_load_stackoverflow)
DE (1) DE3630240A1 (enrdf_load_stackoverflow)
WO (1) WO1988001679A2 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1015097C2 (nl) * 2000-05-03 2001-12-12 I T M Ind Tunnelbouw Methode C Inrichting voor het bouwen van een tunnel.
CN101363320B (zh) * 2007-08-08 2012-06-27 上海市机械施工有限公司 顶盾合一隧道掘进机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19859821A1 (de) * 1998-12-23 1999-11-18 Tachus Gmbh Verfahren und Vorrichtung für den Tunnelbau

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889480A (en) * 1971-09-27 1975-06-17 Gewerk Eisenhuette Westfalia Process of, and a plant for, constructing tunnels
DE2108591B2 (de) * 1970-02-25 1977-06-08 Krismer jun., Josef, Landeck, Tirol (Österreich) Einrichtung und verfahren zur durchfuehrung der schildbauweise fuer die errichtung von tunnels und stollen
DE2653954B2 (de) * 1976-11-27 1979-06-21 Gewerkschaft Eisenhuette Westfalia, 4670 Luenen Vortriebsmesser
EP0122540A2 (en) * 1983-04-14 1984-10-24 Kabushiki Kaisha Iseki Kaihatsu Koki Method and apparatus for thrusting a shield for use in tunneling
GB2169020A (en) * 1984-12-21 1986-07-02 Petromine As A method of reducing pressures on tunnelling shields and tunnel linings in weak rock

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2108591B2 (de) * 1970-02-25 1977-06-08 Krismer jun., Josef, Landeck, Tirol (Österreich) Einrichtung und verfahren zur durchfuehrung der schildbauweise fuer die errichtung von tunnels und stollen
US3889480A (en) * 1971-09-27 1975-06-17 Gewerk Eisenhuette Westfalia Process of, and a plant for, constructing tunnels
DE2653954B2 (de) * 1976-11-27 1979-06-21 Gewerkschaft Eisenhuette Westfalia, 4670 Luenen Vortriebsmesser
EP0122540A2 (en) * 1983-04-14 1984-10-24 Kabushiki Kaisha Iseki Kaihatsu Koki Method and apparatus for thrusting a shield for use in tunneling
GB2169020A (en) * 1984-12-21 1986-07-02 Petromine As A method of reducing pressures on tunnelling shields and tunnel linings in weak rock

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1015097C2 (nl) * 2000-05-03 2001-12-12 I T M Ind Tunnelbouw Methode C Inrichting voor het bouwen van een tunnel.
WO2001083949A3 (en) * 2000-05-03 2002-04-18 I T M Ind Tunnelbouw Methode C Tunnel building device
CN101363320B (zh) * 2007-08-08 2012-06-27 上海市机械施工有限公司 顶盾合一隧道掘进机

Also Published As

Publication number Publication date
WO1988001679A3 (fr) 1988-03-24
DE3630240A1 (de) 1988-03-10
DE3630240C2 (enrdf_load_stackoverflow) 1991-05-29
WO1988001679A2 (en) 1988-03-10

Similar Documents

Publication Publication Date Title
DE1534660C3 (de) Tunne!vortriebsmaschine fur den Schildvortrieb
DE2158764A1 (de) Verfahren zum Herstellen einer unterirdischen Wandung
DE2431652A1 (de) Verfahren und vorrichtung zur herstellung von unterirdischen hohlraeumen
DE3811585A1 (de) Verfahren und vorrichtung zur verarbeitung von moertel und beton im tunnel- und stollenbau
DE2240091C2 (de) Betonierverfahren in Verbindung mit sich am Ortbeton abstützendem Vortriebsschild oder Schneidschuh und Einrichtung zur Durchführung des Verfahrens
DE2108591C3 (de) Einrichtung und Verfahren zur Durchführung der Schildbauweise für die Errichtung von Tunnels und Stollen
DE2550050A1 (de) Einrichtung und verfahren zum auffahren von tunneln u.dgl. mittels eines verbauschildes unter einbringen einer betonauskleidung
DE2921907C2 (enrdf_load_stackoverflow)
DE3514563A1 (de) Tunnelvortriebsmaschine
EP2758633B1 (de) Schildvortriebsvorrichtung
DE2544834C3 (de) Vorrichtung zum Abteufen von Schächten in nicht standfestem Gebirge
DE3630240C2 (enrdf_load_stackoverflow)
DE2706244C2 (de) Messervortriebsverfahren und Messer zum Vortrieb von Tunneln, Stollen u.dgl. unter gleichzeitigem Einbringen einer Betonauskleidung
DE3627270A1 (de) Vortriebsschild, insbesondere fuer den vortrieb mit erddruckgestuetzter ortsbrust, mit einem schneckenfoerderer fuer die bodenfoerderung
AT352774B (de) Vorrichtung zum abbau und ausbringen des boden- materials bei rohrvortrieben
DE3853431T2 (de) Verfahren und gerät zum verbinden von schildtunnelhälften unter tage.
DE4226324A1 (de) Verfahren und einrichtung zum abbau eines untertage-vorkommens
DE3739680A1 (de) Maschine und verfahren zum kontinuierlichen loesen von gestein od. dgl. und abfoerdern des geloesten, zerkleinerten haufwerks im berg-, erd- und tunnelbau
DE102017009069B3 (de) Vorrichtung und Verfahren zur Errichtung eines Wetterdammes
DE7031383U (de) Strebausbauelement fuer den strebausbau im bereich eines dem streo nachzufuehrenden bergedammes.
EP0233979B1 (de) Abdichtung von Deponien
DE2548252A1 (de) Verfahren und vorrichtung zum abbau von kohlehaltigem material
DE3610118A1 (de) Verfahren zum einbringen von beton in eine schalung zum herstellen einer tunnelauskleidung in ortbeton sowie vorrichtungen zur durchfuehrung des verfahrens
DE19619532C2 (de) Verfahren zur Herstellung einer begehbarer Tunnelverbindung zwischen zwei benachbarten, verbohrten Schachtbohrungen und Vorrichtung zur Durchführung des Verfahrens
DE2249708B2 (de) Vorrichtung zum Rohrvorpressen mittels eines am vorzupressenden Rohrstrang stirnseitig angeordneten Schneidschuhes

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE ES FR GB IT NL

17P Request for examination filed

Effective date: 19880907

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900403

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FALTIN, JUERGEN, DIPL.-ING.