EP0116303A1 - Lattice truss for tunnelling - Google Patents

Lattice truss for tunnelling Download PDF

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Publication number
EP0116303A1
EP0116303A1 EP84100336A EP84100336A EP0116303A1 EP 0116303 A1 EP0116303 A1 EP 0116303A1 EP 84100336 A EP84100336 A EP 84100336A EP 84100336 A EP84100336 A EP 84100336A EP 0116303 A1 EP0116303 A1 EP 0116303A1
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EP
European Patent Office
Prior art keywords
girder
support
profile
connecting plate
dome
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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
EP84100336A
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German (de)
French (fr)
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EP0116303B1 (en
Inventor
Rudolf Dipl.-Ing. Seiz
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Tunnel Ausbau Technik GmbH
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Tunnel Ausbau Technik GmbH
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Priority to AT84100336T priority Critical patent/ATE20951T1/en
Publication of EP0116303A1 publication Critical patent/EP0116303A1/en
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Publication of EP0116303B1 publication Critical patent/EP0116303B1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D11/14—Lining predominantly with metal
    • E21D11/30—Bases for lower arch members
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements

Definitions

  • the invention relates to a dome foot beam designed as a lattice girder for the leading dome heading in the tunnel partial excavation method, which can be connected at its one end by means of a connection to the free end of the dome foot beam in the forward direction with respect to vertically downward and laterally directed forces and at both ends depending on the bending moment a protruding over the ends of the girder bars of the carrier carrier end plate in the form of the web of a U-profile piece, the legs of which are welded to the girder bars, while a connecting member projects rigidly from a carrier end perpendicularly above the carrier end plate and a passage opening for one on the back of the Carrier end plate of an adjacent dome foot supporting wedge.
  • bending moment stiffly connectable dome foot beams are known, which, however, are not designed as lattice girders.
  • a lattice girder of the type described at the outset is known from DE-OS 30 14 402, but is used in tunnel construction as part of an arched stiffening element.
  • connection coupling of the known lattice girder now has several disadvantages.
  • the U-profile pieces that have to be welded between the straps of the lattice girder ends have to be processed in different ways. While one U-profile piece has to be provided with three holes, whereby a round bar eyelet has to be welded into two of these holes, the second U-profile piece must also have a hole and an elongated hole, which can only be produced by milling, burning out or punching out. In addition to the significant costs involved, the elongated hole considerably reduces the strength of the U-profile web. In addition, however, the workflow when connecting two lattice girder ends is also cumbersome.
  • the round rod eyelet welded into one U-profile piece must be inserted through the elongated hole of the other profile piece and temporarily wedged on its back until the final connection of the beam ends is then established by means of a screw bolt to be tightened with wrenches, each through a hole in the web of the Profile pieces must be inserted, which presupposes that these holes are pretty much aligned.
  • the handling is extremely restricted and therefore difficult to carry out in the very cramped area in which such a bolt has to be inserted and tightened during the advancing dome drive.
  • the invention has for its object to provide such a lattice girder in which the connecting elements of the girder ends to be connected are very simple and are designed in such a way that by driving in clamping wedges one on site particularly easily accessible direction, the exact, final connection is immediately established, which results in the bending stiffness in the required directions and the torsional stiffness.
  • the dome foot beams according to the invention is considerably simplified compared to the conventional one, since only from above, where sufficient space has already been cleared during the leading dome drive, only two clamping wedges need to be driven in to make the final connection, whereby the holes according to the invention are arranged in the Connection plate also ensures an exact alignment of the newly attached lattice girder with respect to the previous one.
  • the two clamping wedges also provide a high bending strength with regard to horizontally acting forces and also a high torsional strength, since the inserted clamping wedges are supported on the inside of the legs of the U-profile pieces. This is ensured by the hole spacing design according to the invention.
  • connection coupling is also easier to manufacture.
  • the U-profile pieces do not require any processing. Only two additional holes for the clamping wedges have to be drilled in the connecting plate.
  • the advantage of simplicity in the handling of the spherical foot beam according to the invention under the difficult working conditions at the place of use is supplemented by the further advantage that, on the one hand, due to the characterized hole spacing, precise alignment in the lateral direction as well as the desired torsional rigidity is ensured by the contact of the clamping wedge bolts on the inside of the U-profile legs, while the vertical support of the connection point on the one hand and on the other hand a counter bearing for the friction forces occurring when the clamping wedges are hammered in are provided by the mounting bracket.
  • the dome foot bar of FIGS. 1 and 2 designated in its entirety by 10, has a rectangular cross-section with four belt bars running at the edges, the upper of which are designated by 11a and the lower by 11b.
  • These belt rods are connected to one another by lattice reinforcements 12 welded to them.
  • At both ends are slightly above the ends of the belt rods 11a, 11b protruding, perpendicular to them support end plates U-profile pieces 13, 14 welded between the belt bars that one leg 13b, 14b of the U-profile pieces 13, 14 an upper and connects a lower belt rod 11a, 11b with each other.
  • the webs 13a, 14a represent the carrier end plates.
  • the one U-profile Piece 14 is stiffened in its interior by welded plates 15 which connect the ends of the legs 14b to the center of the web 14a.
  • a connecting plate 16 is welded onto the upper end of the other U-profile piece 13, which is also welded to the upper belt rods 11a and protrudes away from the lattice girder over the carrier end plate 13a.
  • the connecting plate 16 has two holes 17 which are circular in the present case in order to accommodate clamping wedge bolts, as will be explained later. However, these holes can also be punched slots for flat clamping wedges.
  • the connecting plate 16 opposite is welded to the underside of the U-profile piece 13, a mounting bracket 18, the distance from the connecting plate 16 increases slightly with increasing distance from the carrier end plate 13.
  • FIG. 3 shows the bending moment-resistant connection of two dome foot beams 10 and 10 'according to the invention.
  • the calotte foot beam 10 with its end having the U-profile piece 14 and the calotte foot beam 10 'with its end carrying the U-profile piece 13' and the connecting plate 16 'and the mounting bracket 18' are pushed together, the distance widening between the mounting bracket 18 'and the connecting plate 16' facilitate the advance of the lattice girder 10 up to the girder end plate 13a.
  • connection of the dome foot beams which can be made with very simple means, creates the bending stiffness required for the pre-threading in the required directions and also an exact alignment of the pre-attached dome foot beam with that already anchored in the dome.
  • connection is torsionally rigid.

Abstract

1. Skull-cap-bottom-girder (10) configured as lattice support for the proceeding skull-cap of a tunnel break-out method, which girder is connectable at its one end by means of a connector with a free end of the leading skull-cap-bottom-girder within the propulsion with respect to upright downwardly and laterally directed forces in a bending strength manner, which girder is provided at each end with one support endplate as base of an U-profile piece (13 ; 14) protruding beyond the ends of the latticerods (11a ; 11b) of the support, the arms of the U-profile piece are welded to the lattice-rods, whereas a connecting member (16) rigidly protrudes from one support end vertically over the support endplate and through a passage opening of a tension wedge (19) supported on the backside of the support endplate of an adjacent skull-cap-bottom-girder, characterized in that the connecting member is a connecting plate (16) welded on two girder rods (11a) vertically with respect the direction of the U-profile, which connecting plate is provided symmetrically with respect to the axis of the support with two apertures (17) having an intermediate distance which is less by one apertures diameter than free distance of the arms of the U-profile pieces (13, 14) and that a mounting support (18) protrudes from the support end opposite to the connecting plate (16) and essentially parallel thereto at the opposing end of the U-profile piece (13).

Description

Die Erfindung betrifft einen als Gitterträger ausgebildeten Kalottenfußbalken für den voreilenden Kalottenvortrieb im Tunnel-Teilausbruchverfahren, der mit seinem einen Ende mittels einer Anschlußverbindung mit dem freien Ende des im Vortrieb vordersten Kalottenfußbalkens bezüglich senkrecht nach unten und seitlich gerichteter Kräfte biegemomentsteif verbindbar ist und an beiden Enden je eine über die Enden der Gurtstäbe des Trägers vorstehende Trägerabschlußplatte in Gestalt des Steges eines U-Profilstückes aufweist, dessen Schenkel mit den Gurtstäben verschweißt sind, während ein Verbindungsglied starr von einem Trägerende senkrecht über die Trägerabschlußplatte vorsteht und eine Durchtrittsöffnung für einen sich auf der Rückseite der Trägerabschlußplatte eines angrenzenden Kalottenfußbalkens abstützenden Spannkeil aufweist.The invention relates to a dome foot beam designed as a lattice girder for the leading dome heading in the tunnel partial excavation method, which can be connected at its one end by means of a connection to the free end of the dome foot beam in the forward direction with respect to vertically downward and laterally directed forces and at both ends depending on the bending moment a protruding over the ends of the girder bars of the carrier carrier end plate in the form of the web of a U-profile piece, the legs of which are welded to the girder bars, while a connecting member projects rigidly from a carrier end perpendicularly above the carrier end plate and a passage opening for one on the back of the Carrier end plate of an adjacent dome foot supporting wedge.

Grundsätzlich sind aus der AT-PS 344 887 für das freie Vorpfänden geeignete, biegemomentsteif miteinander verbindbare Kalottenfußbalken bekannt, welche jedoch nicht als Gitterträger ausgebildet sind. Ein Gitterträger eingangs beschriebener Art ist aus der DE-OS 30 14 402 bekannt, findet jedoch im Tunnelausbau seine Anwendung als Teil bogenförmiger Aussteifungselemente.Basically, from the AT-PS 344 887 suitable for the free pre-plating, bending moment stiffly connectable dome foot beams are known, which, however, are not designed as lattice girders. A lattice girder of the type described at the outset is known from DE-OS 30 14 402, but is used in tunnel construction as part of an arched stiffening element.

Die Verbindungskupplung des bekannten Gitterträgers weist nun mehrere Nachteile auf. Die U-Profilstücke, die zwischen die Gurtstäbe der Gitterträgerenden eingeschweißt werden müssen, müssen in unterschiedlicher Weise bearbeitet werden. Während das eine U-Profilstück mit drei Bohrungen versehen werden muß, wobei in zwei dieser Bohrungen eine Rundstaböse einzuschweißen ist, muß das zweite U-Profilstück ebenfalls eine Bohrung und zusätzlich ein Langloch aufweisen, was nur durch Fräsen, Ausbrennen oder Ausstanzen herzustellen ist. Neben den dafür entstehenden wesentlichen Kosten wird durch das Langloch die Festigkeit des U-Profilsteges erheblich vermindert. Darüber hinaus ist jedoch auch der Arbeitsablauf beim Verbinden zweier Gitterträgerenden umständlich. Zunächst muß die in das eine U-Profilstück eingeschweißte Rundstaböse durch das Langloch des anderen Profilstückes hindurchgesteckt und auf dessen Rückseite vorläufig verkeilt werden, bis dann die endgültige Verbindung der Trägerenden mittels eines mit Schraubenschlüsseln festzuziehenden Schraubbolzens hergestellt wird, der durch jeweils ein Loch im Steg der Profilstücke durchgesteckt werden muß, was voraussetzt, daß diese Löcher ziemlich genau fluchten. Oberdies ist in dem sehr beengten Bereich, in dem beim voreilenden Kalottenvortrieb ein solcher Schraubbolzen eingesetzt und festgezogen werden muß, die Handhabung äußerst eingeschränkt und damit schwierig durchzuführen.The connection coupling of the known lattice girder now has several disadvantages. The U-profile pieces that have to be welded between the straps of the lattice girder ends have to be processed in different ways. While one U-profile piece has to be provided with three holes, whereby a round bar eyelet has to be welded into two of these holes, the second U-profile piece must also have a hole and an elongated hole, which can only be produced by milling, burning out or punching out. In addition to the significant costs involved, the elongated hole considerably reduces the strength of the U-profile web. In addition, however, the workflow when connecting two lattice girder ends is also cumbersome. First, the round rod eyelet welded into one U-profile piece must be inserted through the elongated hole of the other profile piece and temporarily wedged on its back until the final connection of the beam ends is then established by means of a screw bolt to be tightened with wrenches, each through a hole in the web of the Profile pieces must be inserted, which presupposes that these holes are pretty much aligned. In addition, the handling is extremely restricted and therefore difficult to carry out in the very cramped area in which such a bolt has to be inserted and tightened during the advancing dome drive.

Aus diesen Gründen liegt, ausgehend von einem als Gitterträger ausgebildeten Kalottenfußbalken eingangs aufgeführter Art, der Erfindung die Aufgabe zugrunde, einen derartigen Gitterträger zu schaffen, bei dem die Verbindungselemente der aneinanderzuschließenden Trägerenden sehr einfach und dabei so ausgebildet sind, daß durch das Einschlagen von Spannkeilen aus einer am Einsatzort besonders gut zugänglichen Richtung sogleich die exakte, endgültige Verbindung hergestellt ist, die die Biegesteifigkeit in den benötigten Richtungen und die Torsionssteifigkeit ergibt.For these reasons, starting from a dome beam designed as a lattice girder of the type mentioned at the outset, the invention has for its object to provide such a lattice girder in which the connecting elements of the girder ends to be connected are very simple and are designed in such a way that by driving in clamping wedges one on site particularly easily accessible direction, the exact, final connection is immediately established, which results in the bending stiffness in the required directions and the torsional stiffness.

Die Lösung dieser Aufgabe geschieht mit den kennzeichnenden Merkmalen des Patentanspruchs.This object is achieved with the characterizing features of the patent claim.

Das Aneinandersetzen der erfindungsgemäßen Kalottenfußbalken ist gegenüber dem Herkömmlichen wesentlich vereinfacht, da lediglich von oben, wo beim voreilenden Kalottenvortrieb bereits ausreichend Raum freigebrochen ist, nur zwei Spannkeile eingeschlagen zu werden brauchen, um die endgültige Verbindung herzustellen, wobei durch die erfindungsgemäße Anordnung der Bohrungen in der Verbindungsplatte auch eine exakte Ausrichtung des neu angesetzten Gitterträgers gegenüber dem vorherigen gewährleistet ist. Neben der Biegesteifigkeit der Verbindung bezüglich vertikal von oben am angesetzten Gitterträger angreifender Belastungskräfte ist außerdem aufgrund der zwei Spannkeile eine hohe Biegefestigkeit bezüglich horizontal angreifender Kräfte und zudem eine hohe Torsionsfestigkeit gegeben, da sich die eingeschlagenen Spannkeile an den Innenseiten der Schenkel der U-Profilstücke abstützen. Hierfür ist durch die erfindungsgemäße Lochabstandsbemessung gesorgt.Placing the dome foot beams according to the invention is considerably simplified compared to the conventional one, since only from above, where sufficient space has already been cleared during the leading dome drive, only two clamping wedges need to be driven in to make the final connection, whereby the holes according to the invention are arranged in the Connection plate also ensures an exact alignment of the newly attached lattice girder with respect to the previous one. In addition to the bending stiffness of the connection with regard to the load forces acting vertically from above on the attached lattice girder, the two clamping wedges also provide a high bending strength with regard to horizontally acting forces and also a high torsional strength, since the inserted clamping wedges are supported on the inside of the legs of the U-profile pieces. This is ensured by the hole spacing design according to the invention.

Die Verbindungskupplung ist auch einfacher zu fertigen. Die U-Profilstücke benötigen keinerlei Bearbeitung. Lediglich in der Verbindungsplatte sind zwei weitere Bohrungen für die Spannkeile anzubringen. Der Vorteil der Einfachheit bei der Handhabung des erfindungsgemäßen Kalottenfußbalkens unter den erschwerten Arbeitsbedingungen am Einsatzort wird ergänzt durch den weiteren Vorteil, daß durch den charakterisierten Lochabstand einerseits eine genaue Ausrichtung in seitlicher Richtung wie auch die gewünschte Torsionssteifigkeit durch die Anlage der Spannkeilbolzen an den Innenseiten der U-Profilschenkel gewährleistet ist, während durch die Montagestütze die vertikale Ausrichtung der Verbindungsstelle einerseits und andererseits ein Gegenlager für die beim Einschlagen der Spannkeile auftretenden Reibungskräfte gegeben sind.The connection coupling is also easier to manufacture. The U-profile pieces do not require any processing. Only two additional holes for the clamping wedges have to be drilled in the connecting plate. The advantage of simplicity in the handling of the spherical foot beam according to the invention under the difficult working conditions at the place of use is supplemented by the further advantage that, on the one hand, due to the characterized hole spacing, precise alignment in the lateral direction as well as the desired torsional rigidity is ensured by the contact of the clamping wedge bolts on the inside of the U-profile legs, while the vertical support of the connection point on the one hand and on the other hand a counter bearing for the friction forces occurring when the clamping wedges are hammered in are provided by the mounting bracket.

Im folgenden wird die Erfindung anhand des in der Zeichnung dargelegten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1 die beiden Enden eines als Gitterträger ausgebildeten Kalottenfußbalkens gemäß der Erfindung in Seitenansicht;
  • Fig. 2 denselben Kalottenfußbalken in Draufsicht;
  • Fig. 3 die Anschlußverbindung zweier zusammengefügter Kalottenfußbalken in Seitenansicht.
The invention is explained in more detail below on the basis of the exemplary embodiment illustrated in the drawing. Show it:
  • Figure 1 shows the two ends of a dome beam designed as a lattice girder according to the invention in side view.
  • Fig. 2 the same dome foot beam in plan view;
  • Fig. 3 shows the connection connection of two joined Kalottenfußbalken in side view.

Der in seiner Gesamtheit mit 10 bezeichnete Kalottenfußbalken der Figuren 1 und 2 hat rechteckigen Querschnitt mit vier an den Kanten verlaufenden Gurtstäben, deren obere mit 11a und deren untere mit 11b bezeichnet sind. Diese Gurtstäbe sind durch mit ihnen verschweißte Gitterversteifungen 12 miteinander verbunden. An beiden Enden sind als geringfügig über die Enden der Gurtstäbe 11a, 11b vorstehende, zu ihnen senkrecht verlaufende Trägerabschlußplatten U-Profilstücke 13, 14 so zwischen die Gurtstäbe eingeschweißt, daß jeweils ein Schenkel 13b, 14b der U-Profilstücke 13, 14 einen oberen und einen unteren Gurtstab 11a, 11b miteinander verbindet. Die Stege 13a, 14a stellen die Trägerabschlußplatten dar. Das eine U-Profilstück 14 ist in seinem Inneren durch eingeschweißte Platten 15 ausgesteift, welche die Enden der Schenkel 14b mit der Mitte des Steges 14a verbinden. Auf das obere Ende des anderen U-Profilstücks 13 ist dagegen eine Verbindungsplatte 16 aufgeschweißt, die zugleich mit den oberen Gurtstäben 11a verschweißt ist und vom Gitterträger weg über die Trägerabschlußplatte 13a vorsteht. In diesem vorstehenden Bereich weist die Verbindungsplatte 16 zwei Löcher 17 auf, die im vorliegenden Fall kreisförmig sind, um, wie später noch erläutert wird, Spannkeilbolzen aufzunehmen. Diese Löcher können jedoch auch eingestanzte Schlitze für flache Spannkeile sein.The dome foot bar of FIGS. 1 and 2, designated in its entirety by 10, has a rectangular cross-section with four belt bars running at the edges, the upper of which are designated by 11a and the lower by 11b. These belt rods are connected to one another by lattice reinforcements 12 welded to them. At both ends are slightly above the ends of the belt rods 11a, 11b protruding, perpendicular to them support end plates U-profile pieces 13, 14 welded between the belt bars that one leg 13b, 14b of the U-profile pieces 13, 14 an upper and connects a lower belt rod 11a, 11b with each other. The webs 13a, 14a represent the carrier end plates. The one U-profile Piece 14 is stiffened in its interior by welded plates 15 which connect the ends of the legs 14b to the center of the web 14a. On the other hand, a connecting plate 16 is welded onto the upper end of the other U-profile piece 13, which is also welded to the upper belt rods 11a and protrudes away from the lattice girder over the carrier end plate 13a. In this protruding area, the connecting plate 16 has two holes 17 which are circular in the present case in order to accommodate clamping wedge bolts, as will be explained later. However, these holes can also be punched slots for flat clamping wedges.

Der Verbindungsplatte 16 gegenüber ist auf der Unterseite des U-Profilstücks 13 eine Montagestütze 18 festgeschweißt, deren Abstand von der Verbindungsplatte 16 mit zunehmender Entfernung von der Trägerabschlußplatte 13 geringfügig zunimmt.The connecting plate 16 opposite is welded to the underside of the U-profile piece 13, a mounting bracket 18, the distance from the connecting plate 16 increases slightly with increasing distance from the carrier end plate 13.

Die Figur 3 zeigt die biegemomentsteife Verbindung zweier erfindungsgemäßer Kalottenfußbalken 10 und 10'. Zur Herstellung dieser Verbindung werden der Kalottenfußbalken 10 mit seinem das U-Profilstück 14 aufweisenden Ende und der Kalottenfußbalken 10' mit seinem das U-Profilstück 13' sowie die Verbindungsplatte 16' und die Montagestütze 18' tragenden Ende aneinandergeschoben, wobei die Abstandserweiterung zwischen der Montagestütze 18' und der Verbindungsplatte 16' das Vordringen des Gitterträgers 10 bis gegen die Trägerabschlußplatte 13a erleichtert.FIG. 3 shows the bending moment-resistant connection of two dome foot beams 10 and 10 'according to the invention. To establish this connection, the calotte foot beam 10 with its end having the U-profile piece 14 and the calotte foot beam 10 'with its end carrying the U-profile piece 13' and the connecting plate 16 'and the mounting bracket 18' are pushed together, the distance widening between the mounting bracket 18 'and the connecting plate 16' facilitate the advance of the lattice girder 10 up to the girder end plate 13a.

Werden im zusammengeschobenen Zustand dann konische Spannkeilbolzen 19 durch die Löcher 17 eingesetzt und eingeschlagen, wobei die Montagestütze 18' das Weggleiten des Kalottenfußbalkens 10 nach unten verhindert, ist eine vollkommen biegesteife, sehr einfache Verbindung der in waagerechter Richtung zueinander ausgerichteten Kalottenfußbalken 10 und 10' hergestellt.If conical clamping wedge bolts 19 are then inserted and hammered in through the holes 17 in the pushed-together state, the mounting bracket 18 'preventing the spherical cap 10 from sliding downward, is a completely rigid, very simple connection of the in horizontally aligned dome foot beams 10 and 10 '.

Für die exakte Ausrichtung der Kalottenfußbalken 10 und 10' in seitlicher Richtung ist dadurch Sorge getragen, daß die Löcher 17 symmetrisch zur Längsachse des Trägers 10 angeordnet und ihr Lochmittenabstand so gewählt ist, daß er um einen Lochdurchmesser geringer als der lichte U-Profilschenkelabstand ist, so daß die Spannkeilbolzen 19 sich nicht nur auf der Innenseite des Steges 14a, sondern auch an den Innenseiten der Schenkel 14b abstützen.Care is taken for the exact alignment of the calotte foot beams 10 and 10 'in the lateral direction in that the holes 17 are arranged symmetrically to the longitudinal axis of the support 10 and their hole center distance is selected such that it is one hole diameter less than the clear U-profile leg distance, so that the clamping wedge bolts 19 are supported not only on the inside of the web 14a, but also on the inside of the legs 14b.

Die mit sehr einfachen Mitteln herzustellende Verbindung der Kalottenfußbalken schafft die für das Vorpfäden erforderliche Biegesteifigkeit in den benötigten Richtungen und außerdem eine exakte Ausrichtung des vorgepfändeten Kalottenfußbalkens gegenüber dem bereits in der Kalotte verankerten. Darüberhinaus ist die Verbindung torsionssteif.The connection of the dome foot beams, which can be made with very simple means, creates the bending stiffness required for the pre-threading in the required directions and also an exact alignment of the pre-attached dome foot beam with that already anchored in the dome. In addition, the connection is torsionally rigid.

Claims (1)

Als Gitterträger ausgebildeter Kalottenfußbalken für den voreilenden Kalottenvortrieb im Tunnel-Teilausbruchverfahren, der mit seinem einen Ende mittels einer Anschlußverbindung mit dem freien Ende des im Vortrieb vordersten Kalottenfußbalkens bezüglich senkrecht nach unten und seitlich gerichteter Kräfte biegemomentsteif verbindbar ist und an beiden Enden je eine über die Enden der Gurtstäbe des Trägers vorstehende Trägerabschlußplatte in Gestalt des Steges eines U-Profilstückes aufweist, dessen Schenkel mit den Gurtstäben verschweißt sind, während ein Verbindungsglied starr von einem Trägerende senkrecht über die Trägerabschlußplatte vorsteht und eine Durchtrittsöffnung für einen sich auf der Rückseite der Trägerabschlußplatte eines angrenzenden Kalottenfußbalkens abstützenden Spannkeil aufweist, dadurch gekennzeichnet , daß das Verbindungsglied eine auf zwei Gurtstäben (11a) aufgeschweißte, senkrecht zum U-Profilverlauf gerichtete Verbindungsplatte (16) ist, in der sich symmetrisch zur Trägerachse zwei Löcher (17) mit einem Lochmittenabstand befinden, der um einen Lochdurchmesser geringer als der lichte Schenkelabstand der U-Profilstücke (13, 14) ist, und daß, der Verbindungsplatte (16) gegenübergestellt und zu ihr im wesentlichen parallel, am gegenüberliegenden Ende des U-Profilstückes (13) vom Trägerende eine Montagestütze (18) absteht.A dome foot beam designed as a lattice girder for leading dome propulsion in the partial tunnel excavation method, which can be connected at its one end by means of a connection to the free end of the dome foot beam that is in the forward direction with respect to vertically downward and laterally directed forces, and at both ends one at the ends the girder bars of the girder projecting girder end plate in the form of the web of a U-profile piece, the legs of which are welded to the girder rods, while a connecting member projects rigidly from a girder end perpendicularly above the girder end plate and a passage opening for an adjoining calotte foot beam on the back of the girder end plate has a supporting clamping wedge, characterized in that the connecting member is a connecting plate (16) welded onto two belt rods (11a) and oriented perpendicular to the U-profile profile, in which there is symmetry to the support axis are two holes (17) with a hole center distance which is smaller by a hole diameter than the clear leg distance of the U-profile pieces (13, 14), and that, the connecting plate (16) opposite and substantially parallel to it, on the opposite A mounting bracket (18) protrudes from the end of the U-profile piece (13) from the end of the beam.
EP84100336A 1983-02-12 1984-01-13 Lattice truss for tunnelling Expired EP0116303B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84100336T ATE20951T1 (en) 1983-02-12 1984-01-13 Spherical base beam designed as a lattice support.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3304843A DE3304843C1 (en) 1983-02-12 1983-02-12 Calotte foot beam designed as a lattice girder
DE3304843 1983-02-12

Publications (2)

Publication Number Publication Date
EP0116303A1 true EP0116303A1 (en) 1984-08-22
EP0116303B1 EP0116303B1 (en) 1986-07-23

Family

ID=6190667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100336A Expired EP0116303B1 (en) 1983-02-12 1984-01-13 Lattice truss for tunnelling

Country Status (3)

Country Link
EP (1) EP0116303B1 (en)
AT (1) ATE20951T1 (en)
DE (1) DE3304843C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2924189A3 (en) * 2014-03-20 2016-07-20 Tunnel-Ausbau-Technik GmbH Formwork girder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006017048U1 (en) * 2006-11-08 2007-01-04 Tunnel-Ausbau-Technik Gmbh Device for connecting ends of at least two grid supports used in tunnel construction has plates fixed between each pair of belt rods and bridged by a tie strap that fixes two grid supports together

Citations (8)

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Publication number Priority date Publication date Assignee Title
DE1724630U (en) * 1955-04-09 1956-06-21 Gewerk Eisenhuette Westfalia WEDGE, IN PARTICULAR FLAT WEDGE.
FR1159379A (en) * 1955-12-17 1958-06-26 Stahlschweisswerk Wartmann A G Joint of two elements placed end to end
DE1211865B (en) * 1961-09-19 1966-03-03 Gewerk Eisenhuette Westfalia Round wedge cross connection
US3300237A (en) * 1964-05-21 1967-01-24 Carl R Rolen Connected column and beam construction
US3434748A (en) * 1966-07-20 1969-03-25 Ind De Transformation Des Plas Device for assembly of metallic sectional structures
DE6606103U (en) * 1967-10-21 1970-08-20 Hueck Eduard JOINT CONNECTION FOR HOLLOW PROFILE PIECES THAT ARE SUBSTANTLY VERTICAL, IN PARTICULAR FOR USE ON PARTITIONS, PROTECTIVE RAILING, ETC.
DE2659603A1 (en) * 1976-12-28 1978-06-29 Martin Schack Engel Pegged mortice and tenon furniture joint - has tenon of reduced section passing through mortice and held in place by peg through hole near end on tenon
DE3014402A1 (en) * 1979-04-18 1980-11-13 Pantex Stahl Ag LATTICE GIRDER FOR UNDERGROUND LINE AND SHAFT CONSTRUCTION

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2443276C3 (en) * 1974-09-10 1979-04-26 Beton- Und Monierbau Ag, 4000 Duesseldorf Expansion for tunnels of curved cross-section driven with stepped or sloped face

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1724630U (en) * 1955-04-09 1956-06-21 Gewerk Eisenhuette Westfalia WEDGE, IN PARTICULAR FLAT WEDGE.
FR1159379A (en) * 1955-12-17 1958-06-26 Stahlschweisswerk Wartmann A G Joint of two elements placed end to end
DE1211865B (en) * 1961-09-19 1966-03-03 Gewerk Eisenhuette Westfalia Round wedge cross connection
US3300237A (en) * 1964-05-21 1967-01-24 Carl R Rolen Connected column and beam construction
US3434748A (en) * 1966-07-20 1969-03-25 Ind De Transformation Des Plas Device for assembly of metallic sectional structures
DE6606103U (en) * 1967-10-21 1970-08-20 Hueck Eduard JOINT CONNECTION FOR HOLLOW PROFILE PIECES THAT ARE SUBSTANTLY VERTICAL, IN PARTICULAR FOR USE ON PARTITIONS, PROTECTIVE RAILING, ETC.
DE2659603A1 (en) * 1976-12-28 1978-06-29 Martin Schack Engel Pegged mortice and tenon furniture joint - has tenon of reduced section passing through mortice and held in place by peg through hole near end on tenon
DE3014402A1 (en) * 1979-04-18 1980-11-13 Pantex Stahl Ag LATTICE GIRDER FOR UNDERGROUND LINE AND SHAFT CONSTRUCTION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2924189A3 (en) * 2014-03-20 2016-07-20 Tunnel-Ausbau-Technik GmbH Formwork girder

Also Published As

Publication number Publication date
EP0116303B1 (en) 1986-07-23
ATE20951T1 (en) 1986-08-15
DE3304843C1 (en) 1984-06-28

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