EP0595934A1 - Ajustement radial des lames d'un bouclier de percement porte-lames. - Google Patents

Ajustement radial des lames d'un bouclier de percement porte-lames.

Info

Publication number
EP0595934A1
EP0595934A1 EP92915969A EP92915969A EP0595934A1 EP 0595934 A1 EP0595934 A1 EP 0595934A1 EP 92915969 A EP92915969 A EP 92915969A EP 92915969 A EP92915969 A EP 92915969A EP 0595934 A1 EP0595934 A1 EP 0595934A1
Authority
EP
European Patent Office
Prior art keywords
support frame
wedge
knife
intermediate bearing
radial control
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
EP92915969A
Other languages
German (de)
English (en)
Other versions
EP0595934B1 (fr
Inventor
Heinz-Theo Dipl-Ing Walbroehl
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.)
WALBROEHL H T DIPL ING
Original Assignee
WALBROEHL H T DIPL ING
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 WALBROEHL H T DIPL ING filed Critical WALBROEHL H T DIPL ING
Publication of EP0595934A1 publication Critical patent/EP0595934A1/fr
Application granted granted Critical
Publication of EP0595934B1 publication Critical patent/EP0595934B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • E21D9/0692—Cutter drive shields

Definitions

  • the invention relates to a radial control of knives of a knife shield driving device, as described in claim 1.
  • DE-AS 27 42 332 discloses a method and a device for controlling the propulsion device of a knife blade.
  • the radial control of the knives takes place via an interaction of a pivotable knife tip and adjustable wedge surfaces on the underside of the knives in the area of the support frame.
  • the wedges or the wedge surfaces can be adjusted by means of adjusting screws which are actuated by hand.
  • the adjustment device which consists of wedges only, for the inclination of the knives cannot be damaged even by high pressure forces.
  • the drive device can advantageously be designed to be automatically operated and centrally controllable. This eliminates the very time-consuming and labor-intensive manual operation of the adjusting means for the radial control of the knives.
  • the wedges are expediently arranged such that the inclined wedge surfaces of the immovable and the movable wedge lie against one another and have an identical inclination.
  • the wedges rest securely on the support frame and the underside of the knives, since the base surfaces of the wedges opposite the oblique wedge surfaces come to rest on the underside of the knives and on the support frame.
  • the wedge surface of the movable wedge is advantageously longer than the wedge surface of the immovable wedge.
  • An intermediate bearing is expediently arranged between the movable wedge and the front support frame, in order in particular to achieve a perfect support of the movable wedge on the support frame in the arch region of the support frame.
  • the intermediate bearing can advantageously be moved on the support frame in its circumferential direction.
  • this has a flat base plate.
  • the base of the movable wedge can thus lie flat on the flat base plate. This arrangement also keeps the frictional forces between the movable wedge and the intermediate bearing low.
  • a stilt is arranged between the base plate of the intermediate bearing and the support frame, the underside of which, facing the support frame, corresponds to the curvature of the corresponding support frame section.
  • the pressure forces which are guided by the knife into the support frame can thus be introduced into the corresponding support frame section in an evenly distributed manner via the bracing.
  • a merely linear loading of the support frame in the area of the intermediate storage is thus avoided.
  • the elevation advantageously consists of a plurality of sections spaced apart from one another and extending in the circumferential direction of the support frame. During a movement in the circumferential direction of the intermediate bearing on the support frame, the frictional forces can thus be kept low, with a sufficient distribution of the pressure forces taking place at the same time.
  • the intermediate bearings preferably have elements for guiding the knives. This prevents the knives from slipping off the intermediate storage during advance.
  • the elements for guiding the knives expediently consist of side walls oriented at right angles to the base plate, which are arranged, preferably welded, on the side ends of the base plate.
  • the sidewalls as seen towards the mountains or the ground, are led up so far that they overlap a lower area of the knives and the knives are guided with their lower area between the sidewalls.
  • the side cheeks are advantageously formed in the direction of advance beyond the front and rear end of the support frame and, viewed towards the center of the cutout, extend downward over the upper end of the support frame in order to form front and rear stops for the intermediate bearing.
  • the frictional forces which act on the intermediate bearing from a movement of the movable wedge in the direction of advance cannot therefore push the intermediate bearing away from the support frame.
  • the stops represent a position securing in the direction of advance for the intermediate storage.
  • the front part of the side cheeks lying in the forward direction expediently engages under a projection of the support frame in order to lift the intermediate bearing from
  • the rear part of the sidewalls located at the rear in the direction of advance can also engage under a corresponding projection of the support frame, so that lifting off the support frame can be avoided in both tilting and rotating directions of the intermediate bearing.
  • the intermediate bearing preferably comprises the frame and the knife in a clamp-like manner, a device which exerts a compressive force being arranged between the intermediate bearing and the knife and / or the intermediate bearing and the frame.
  • This device can consist, for example, of cylinders or preferably of compression springs.
  • the intermediate storage thus represents a connection between the respective knife and the associated frame.
  • the connection should not be rigid, in order to further allow the knife to be inclined about its transverse axis. If cylinders are used as the device which exerts a compressive force, these could, for example, be cushioned by gas or air pressure in order to enable the inclination of the knife.
  • the proposed embodiment is particularly suitable for the lateral knives of the knife shield advancing device.
  • the desired radial movement of the knives inwards always takes place without any problem when there is a compressive force on the knife towards the tunnel axis.
  • this can be earth pressure as an external force. If there is no earth pressure, this force can also be caused in the ridge knives by the weight of these knives.
  • Such a so-called radial force is, however, only present in a smaller size in the lateral knives.
  • the proposed embodiment can ensure that, in the absence of an earth pressure or own weight load on the knives, they are always pulled radially inward, so that an exact Positions of the wedges corresponding radial movement of the knife towards the tunnel axis can take place.
  • the intermediate storage can also be designed so that it only requires the use of a cylinder for the two pairs of wedges.
  • the immovable wedge is preferably prevented from moving in the direction of advance by stops arranged between the side cheeks.
  • the immovable wedge can thus not be displaced relative to the intermediate storage or to the support frame.
  • the knife advances, its underside slides on the base of the immovable wedge without being able to move it in the direction of advance.
  • the immovable wedge can only perform a movement perpendicular to the direction of propulsion in the direction of the mountain or ground.
  • the arrangement of the stops makes it possible to insert the immovable wedge only between the stops.
  • the immovable wedge can therefore be exchanged without any problems.
  • the pressure force from the knives on the immovable wedge should as far as possible always be effective in the area of the wedge center. Therefore, the base of the immovable wedge facing the knife advantageously has a slightly spherical or curved or curved shape. An edging of the underside of the knife in the direction of advance The front or rear closure of the non-releasable wedge can thus be avoided.
  • the drive device is expediently attached to the intermediate storage, in particular in the form of a hydraulic or pneumatic cylinder on the intermediate storage, in particular to the side walls.
  • the cylinder expediently has an extendable piston rod arranged on the movable wedge, the extension of which causes the movement of the movable wedge in the direction of advance or against it.
  • the cylinder is advantageously articulated on the intermediate bearing, in particular on the side cheeks, just as the piston rod of the cylinder is advantageously articulated on the movable wedge. As a result, bending stresses on the cylinder and the piston rod can be avoided.
  • two pairs of immovable and movable wedges lying against one another are provided.
  • the wedge pairs are preferably arranged in the side areas of the knife and spaced apart.
  • the intermediate bearings can expediently have two additional center cheeks spaced from the side cheeks, a pair of the mutually immovable and movable wedges being arranged between the side cheeks and the respectively adjacent middle cheek.
  • the interaction of the side cheeks with the respective middle cheeks thus provides lateral guidance for the wedge pairs.
  • the central cheeks are preferably essentially identical to the side cheeks.
  • the cross-sectional widths of the immovable and movable wedges which lie against one another are advantageously the same and correspond to the distance between the side cheeks or one side cheek and the respectively adjacent middle cheek. Safe guidance of the wedges can thus be achieved. Even when only one pair of wedges is arranged, the aforementioned cross-sectional widths are preferably the same and correspond to the distance between the side cheeks.
  • the running surface or underside of the knives is expediently formed by two webs which extend downwards to the center of the cutout and each engage in the space between a side cheek and the adjacent center cheek for guiding the knives.
  • the upper end area of the side and middle cheeks facing the mountain or the floor thus overlaps the respective web, so that there is a safe lateral guidance of the knives between the cheeks.
  • the cross section of the respective webs is preferably seen in the circumferential direction of the support frame, as large as the distance between one side cheek and the adjacent middle cheek.
  • the play between the side cheeks and thus between the intermediate bearing and the knife can thus be kept as low as possible.
  • the rear support frame arranged in the direction of the breakout it is understood that this must be made larger in the radial direction than the front support frame in order to compensate for the height resulting from the arrangement of the wedges on the front support frame.
  • a horizontal alignment of the knives there is a so-called zero position of the wedges, in which case the distance between the knife and the front support frame caused by the wedges corresponds to the excess of the rear support frame in the radial direction.
  • Another intermediate storage device may be arranged moderately between the knife and the rear support frame arranged at the rear in the direction of advance. Consequently, the oversize of the rear frame decreases in the radial direction by the thickness of the intermediate bearing between the knife and the rear support frame.
  • the further intermediate store can at least substantially correspond to the intermediate store arranged on the front frame.
  • the upper side of the base plate of the further intermediate bearing facing the knife is preferably slightly spherical or curved or curved. This can be achieved by introducing the pressure force or contact force from the knife into the center of the further intermediate storage. The contact force can thus act in the middle of the further intermediate storage due to the design of the upper side. Edging on the front or rear ends of the further intermediate storage device in the direction of advance when the knife is inclined can thus be avoided.
  • FIG. 1 is a schematic side view of a knife on two support frames with the wedge bearing according to the invention with a horizontal orientation of the knife
  • FIG. 2 shows the position of the knife and the wedge arrangement according to FIG. 1, but when the knife is steered down to the center of the breakout
  • FIG. 3 shows the position of the knife and the wedge arrangement according to FIG. 1, but when the knife is steered upwards towards the mountain or ground
  • 4 shows a side view of the radial control according to the invention according to a section BB from FIG. 7,
  • FIG. 5 is a view of the radial control according to a section A-A of FIG. 7,
  • FIGS. 9 shows a view of another radial control according to a section C - C from FIGS. 9 and
  • FIG. 9 is a side view of the other radial control according to a section D - D from FIG. 8.
  • FIG. 1 to 3 show schematic side views of a knife 2 of a knife shield driving device, which lies on a front support frame 4 and a rear support frame 6. Also shown only schematically are an immovable wedge 10 facing the underside 8 of the knife 2 and a movable wedge 12 facing the front support frame 4 of the radial control according to the invention.
  • 1 shows the knife 2 in a horizontal orientation, the wedges 10, 12 being in the so-called zero position. From Fig. 1 it can be seen that the dimension of the rear support frame 6 in the radial direction by the so-called zero dimension of the wedges 10, 12, i.e. the distance between the knife 2 and the front support frame 6 resulting from the wedges 10, 12 is greater.
  • Fig. 2 shows the knife 2 in a downward position, ie towards the center of the cutout.
  • the movable wedge 2 is pulled back against the direction of advance in order to cause the downward inclination of the knife 2.
  • Fig. 3 shows the control of the knife 2 upwards, i.e. to the mountains or the ground.
  • the movable wedge 12 is moved in the direction of advance so that the knife 2 can tilt towards the mountains.
  • FIG. 4 shows a side view of the radial control according to the invention in accordance with a section B-B from FIG. 7.
  • the immovable wedge 10 On the underside 8 of the knife 2 there is the immovable wedge 10, the base 34 of which faces the underside 8.
  • the wedge surface 14 lying opposite the base surface 34 of the wedge 10 lies on a wedge surface 16 of the movable wedge 12.
  • the base surface 42 lying opposite the wedge surface 16 of the movable wedge 12 rests on an intermediate bearing 18 which is supported on the front support frame 4. Consequently, the immovable wedge 10, the movable wedge 12 and the intermediate bearing 18 are arranged between the knife 2 and the support frame 4, seen from above, towards the center of the breakout.
  • the wedge surfaces 14, 16 of the wedges 10, 12 which cause the wedge effects face one another and have an identical inclination.
  • the base surfaces 34, 42 of the wedges 10, 12 are thus always horizontal, i.e. aligned in the direction of breakout or perpendicular to the main plane of the support frame 4.
  • a change in the inclination of the knife 2 from the horizontal or zero position results from a movement of the movable wedge 12 in the direction of advance or against the direction of advance.
  • This movability of the movable wedge 12 is caused by a preferably hydraulic or pneumatic drive device, one of which is articulated to a side cheek 26 and thus to the intermediate bearing 18 Connected cylinder 36 and a piston rod 44 guided in the cylinder 36 and articulated to the movable wedge 12 are shown.
  • the piston rod 44 is preferably connected to the movable wedge 12 in the end region of the movable wedge 12 opposite the breakout direction.
  • the movable wedge 12 is supported on the front support frame 4 with the interposition of the intermediate bearing 18, the configuration of which is described in more detail later in FIG. 6.
  • the intermediate bearing 18 is immovably arranged on the front support frame 4 in the driving direction, so that when the movable wedge 12 moves in the driving direction, its base surface 42 facing the intermediate bearing 18 is displaced on the intermediate bearing 18 by a relative movement of the movable wedge 12 to the intermediate bearing 18 or to the front support frame 4. So that when the movable wedge 12 is moved in the direction of advance, the immovable wedge 10 cannot also be moved in the direction of advance, it is secured via stops 32 of the intermediate bearing 18 in such a way that it is not relative to the intermediate bearing 18 or to the front support frame 4 can move. It goes without saying that the underside 8 of the knife 2 can slide over the base 34 of the immovable wedge 10 during its propulsion without moving the immovable wedge 10 relative to the intermediate bearing 18 or to the front support frame 4 in the driving direction.
  • the movable wedge 12 In order to control the knife 2 downwards, ie towards the center of the breakout, the movable wedge 12 is moved backwards by actuating the piston rod 44 of the cylinder 36, ie counter to the direction of advance. This reduces the distance between the underside 8 of the knife 2 and the support frame 4. Because the knife 2 on the rear support frame 6, which is arranged at the rear in the advancing direction, is undisturbed in the direction of the rock or ground. is slidably mounted, the reduction in distance between the underside 8 of the knife 2 and the front support frame 4 produces the desired inclination of the knife 2.
  • the movable wedge 12 can be moved in the driving direction by the piston rod 44 of the cylinder 36.
  • the wedge surface 16 of the movable wedge 12 viewed in the direction of advance, is longer than the wedge surface 14 of the immovable wedge 10.
  • the drive device consisting of the cylinder 36 and the piston rod 44 for the Movable wedge 12 is preferably designed to be automatically operated and centrally controllable.
  • the base surface 34 of the immovable wedge 10 is preferably spherical or curved or curved. The positional force or the pressure force from the knife 2 thus always acts on the immovable wedge 10 in its central region.
  • the design of the intermediate storage 18 results in particular from FIGS. 4 and 6.
  • the view of the intermediate storage 18 according to FIG. 6 shows that the intermediate storage 18 consists of an essentially flat base plate 20, at its free side boundaries, in the circumferential direction side cheeks 26 of the support arch 4 are arranged, which are aligned essentially perpendicular to the base plate 20. Adjacent to the side cheeks 26 are formed middle cheeks 38, which are somewhat shorter than the side cheeks in their cross-sectional height, and are somewhat shorter than the side cheeks 26.
  • the base plate 20 of the intermediate bearing 18 serves to support the base 42 of the movable wedge 12.
  • the side cheeks 26 are in the direction of advance over the front and rear end of the front support frame 4 are also formed (FIG.
  • a front part 28 of the side cheeks 26 lying in the forward direction is designed such that it can engage under a projection 30 of the support frame 4 in order to prevent the intermediate bearing 18 from being lifted off the support frame 4 (FIG. 4).
  • the side cheek in the area of the rear stop 48 can have such a grip.
  • the intermediate bearing 18 is provided on a support 22 in the form of sections 24 on the front Support frame 4 stored.
  • the sections 24 have a curvature on the underside facing the front support frame 4 which corresponds to the curvature of the corresponding support frame section.
  • the intermediate bearing 18 and thus the knife 2 can consequently move in the circumferential direction of the front support frame 4.
  • the sections 24 also ensure a distribution of forces of the compressive forces or contact forces acting on the support frame 4 from the knife 2.
  • Three sections 24 are preferably provided between the base plate 20 and the front support frame 4.
  • two pairs of immovable wedges 10 and movable wedges 12 are provided, which are arranged between the side cheeks 26 and the respectively adjacent middle cheek 38.
  • the cross-sectional widths of the wedges 10, 12 lying against one another are the same and correspond approximately to the distance between a side cheek 26 and the respective one adjacent central cheek 38.
  • the underside of the knife 2 is provided with two webs 40 which extend downward towards the center of the cutout and each engage in the space between a side cheek 26 and the adjacent central cheek 38 for guiding the knife 2.
  • the side cheeks 26 and the middle cheeks 38 are consequently formed beyond the lower end of the knife 2, ie the lower end of the webs 40, to form the desired guidance of the knife 2.
  • FIG. 7 also shows the articulation of the cylinder 36 on the side cheeks 26 and the articulation of the piston rod 44 of the cylinder 36 on the movable wedge 12. Also shown in FIG. 7 is the arrangement of the stops 32 for the immovable wedge 10, which are a connecting piece between the side cheeks 36 and the adjacent middle cheek 38 and are preferably welded there.
  • the expedient arrangement of a further intermediate bearing between the knife 2 and the rear support frame 6 arranged at the rear in the direction of advance is not shown.
  • the upper side of the base plate of the further intermediate bearing facing the knife 2 can be slightly crowned or curved or be curved so that the contact force from the knife 2 into the further intermediate storage always acts in its central region.
  • FIG. 8 shows in cross section another embodiment of the radial control according to the invention in accordance with a section C - C from FIG. 9.
  • This further embodiment differs in the clip-like design of an intermediate bearing 118, which is a connection between a knife 102 and a corresponding front support frame 104 forms.
  • Another difference is the use of only one cylinder 136 for the back and forth movement of the two movable wedges 112 in the direction of advance of the two pairs of wedges 110, 112.
  • the intermediate storage 118 has only two side cheeks 126. Middle cheeks as in the previously described exemplary embodiment are not provided.
  • the side cheeks 126 are connected to one another via a base plate 120 and a cover plate 150.
  • the immovable wedge 110 and the movable wedge 112 are arranged between them. The movement of the movable wedge 112 and the position of the immovable wedge 110 are carried out as in the previously described exemplary embodiment.
  • the free ends of the webs 140 of the knife 102 have a projection 152 directed outwards to the side cheeks 126.
  • the free ends of the side cheeks 126 facing the knife 102 are on the one hand led upwards beyond these projections 152 and also have projections 154 which are directed inwards towards the webs 140 and overlap the projections 152.
  • the clamp-like overlapping of the intermediate bearing 118 with the knife 102 is achieved via this configuration of the projections 152, 154.
  • the other free end of the side cheeks 126 facing the tunnel axis is guided in the form of a front 146 and rear stop 148 over the upper end of the support frame 104.
  • the upper end of the support frame 104 is formed by a plate 158, seen in the axial direction of the tunnel, having projections 156 at the front and rear.
  • the free ends 126 of the front 146 and rear stops 148 have the webs 126 connecting webs 160.
  • the webs 160 are formed up to the support frame 104 so that they engage under the projections 156 of the plate 158, the web 160 being arranged at a distance from the projections 156.
  • compression springs 164 and a connecting piece 164 are arranged in the space between the webs 160 and the protrusions 156.
  • the connecting piece 164 faces the plate 158 or the projection 156 and has a curved surface corresponding to the curvature of the support frame 104 for abutment in this area, so that in this case too, a movement of the intermediate bearing 118 in the circumferential direction of the support frame 104 is possible.
  • Each connecting piece has two compression springs 162 in the region of its free ends, which are supported on the one hand on the upper side of the webs 160 and on the other hand on the lower side of the connecting piece 164.
  • the clamp-like connection of the intermediate bearing 118 to the support frame 104 is accordingly carried out via the webs 160, the compression springs 162, the connecting pieces 164 and the projections 156 of the plate 158.
  • the clamp-like connection of the knife 102 to the support frame 104 via the intermediate bearing 118 and the use of the compression springs 162 ensures a radial movement of the knife 102 even in the event that there should be no compressive force acting in the radial direction on the knife 102.
  • the compression springs 162 provide the connection between the knife 102 and the support frame 104 on the one hand, but allow the required inclination of the knife 102 at any time when the movable wedge 112 moves for radial control of the knife 102.
  • cylinders can also be used can be either controllable and / or gas or air pressure cushioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Details Of Cutting Devices (AREA)

Abstract

Une nouvelle commande radiale des lames d'un bouclier de percement porte-lames permet d'éliminer les travaux longs et laborieux d'ajustement des logements de clavettes dans la région située entre une lame d'un bouclier de percement porte-lames et un cadre de support. Pour commander radialement les lames (2) qui sont soutenues sur les cadres de support (4, 6) et qui peuvent être individuellement entraînées en avant dans un ordre prédéterminé, deux clavettes superposées (10, 12) sont agencées entre la face inférieure (8) des lames et le cadre de soutien antérieur (4), vu dans le sens d'avancement. Une clavette (10) est montée sur la face inférieure (8) des lames (2) de manière inamovible dans le sens d'avancement par rapport au cadre de support (4) et l'autre clavette (12) peut être déplacée par rapport au cadre de support (4) au moyen d'un dispositif d'entraînement, notamment hydraulique ou pneumatique, afin d'incliner les lames (2) dans la mesure requise pour les commander radialement.
EP92915969A 1991-07-23 1992-07-22 Ajustement radial des lames d'un bouclier de percement porte-lames Expired - Lifetime EP0595934B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4124419A DE4124419A1 (de) 1991-07-23 1991-07-23 Radialsteuerung von messern einer messerschildvortriebsvorrichtung
DE4124419 1991-07-23
PCT/EP1992/001677 WO1993002275A1 (fr) 1991-07-23 1992-07-22 Ajustement radial des lames d'un bouclier de percement porte-lames

Publications (2)

Publication Number Publication Date
EP0595934A1 true EP0595934A1 (fr) 1994-05-11
EP0595934B1 EP0595934B1 (fr) 1996-04-17

Family

ID=6436844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92915969A Expired - Lifetime EP0595934B1 (fr) 1991-07-23 1992-07-22 Ajustement radial des lames d'un bouclier de percement porte-lames

Country Status (4)

Country Link
EP (1) EP0595934B1 (fr)
DE (2) DE4124419A1 (fr)
ES (1) ES2089542T3 (fr)
WO (1) WO1993002275A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT354504B (de) * 1975-05-10 1979-01-10 Gewerk Eisenhuette Westfalia Vortriebsschild fuer den tunnel- oder stollen- vortrieb u. dgl.
DE2742332C3 (de) * 1977-09-20 1987-01-22 Walbröhl, Heinz-Theo, Dipl.-Ing., 5300 Bonn Lenkbare Messerschildvortriebseinrichtung und Vortriebsmesser
FR2441717A1 (fr) * 1978-11-20 1980-06-13 Sp K Tekhn Bouclier utilise dans la construction de tunnels a revetement monolithe en beton presse
WO1990015222A1 (fr) * 1989-06-09 1990-12-13 Walbroehl H T Dispositif d'ouverture et de soutenement de galeries d'avancement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9302275A1 *

Also Published As

Publication number Publication date
WO1993002275A1 (fr) 1993-02-04
ES2089542T3 (es) 1996-10-01
DE59206064D1 (de) 1996-05-23
DE4124419A1 (de) 1993-01-28
EP0595934B1 (fr) 1996-04-17

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