EP0073733B1 - Grid-like girder for the support of underground galleries and shafts - Google Patents

Grid-like girder for the support of underground galleries and shafts Download PDF

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Publication number
EP0073733B1
EP0073733B1 EP82810334A EP82810334A EP0073733B1 EP 0073733 B1 EP0073733 B1 EP 0073733B1 EP 82810334 A EP82810334 A EP 82810334A EP 82810334 A EP82810334 A EP 82810334A EP 0073733 B1 EP0073733 B1 EP 0073733B1
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EP
European Patent Office
Prior art keywords
lattice girder
another
members
triangles
girder according
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Expired
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EP82810334A
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German (de)
French (fr)
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EP0073733A1 (en
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Edgar Arnold
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Pantex-Stahl AG
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Pantex-Stahl AG
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Priority to AT82810334T priority Critical patent/ATE13577T1/en
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    • 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
    • E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
    • 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
    • E21D11/14—Lining predominantly with metal
    • E21D11/18—Arch members ; Network made of arch members ; Ring elements; Polygon elements; Polygon elements inside arches

Definitions

  • the invention relates to a lattice girder for the underground line and shaft expansion according to the preamble of claim 1.
  • welded lattice girders are used to produce curved expansion frames and as reinforcement in the subsequent concreting.
  • Such a lattice girder is described for example in DE-U-8 020 051 or DE-A-2 951 874. It has three or more parallel belt bars, which are stiffened like a truss by means of individual zigzag bars arranged in zigzag fashion. The kink, shape and cross-sectional stability of this lattice girder is relatively small.
  • the belt bars tend to buckle and buckle under load.
  • the infill bars are individually welded to the belt bars, whereby the many welds cause the material to become brittle. The welds can break under heavy stress, which leads to the rebars being deflected.
  • a significant increase in the bending stiffness and bending load capacity as well as the torsional strength can be achieved by means of stiffening elements arranged centrally between the belt bars, as is evident from DE-A-27 09 242.
  • Composite sheet metal pressed parts are provided here as inner stiffeners, which have laterally projecting, eyelet-like projections, which encompass the belt bars in a form-fitting manner.
  • the sheet metal parts are complicated to manufacture and correspondingly expensive. Their main disadvantage is that they form a considerable splash shadow, so that the perfect bond between the lattice girder and the concrete is not guaranteed.
  • a lighter lattice girder is sufficient, which is simpler in construction and can be constructed accordingly cheaper.
  • a lattice girder should nevertheless have a sufficiently high level of dimensional stability or cross-sectional stability both against bending stresses and against stresses due to buckling and torsion. It should be possible to use it at least partially load-bearing until it is concreted in and its belt bars form the reinforcement of the final reinforced concrete structure.
  • the infill must be designed so that there are no splash shadows when concreting.
  • the object of the invention is now to provide a lattice girder that meets these requirements. According to the invention, this is done by the features defined in the characterizing part of patent claim 1.
  • connecting brackets as stiffening elements of the lattice girder which consist of triangularly curved round bars which are welded with their ends to the belts.
  • connecting brackets as stiffening elements of the lattice girder which consist of triangularly curved round bars which are welded with their ends to the belts.
  • FR-A-1 098 003 it is also known to provide wavy curved round rods as stiffening elements.
  • the lattice girder shown in the figures has three parallel belt bars 1, 2, 3, which form a triangle in normal section.
  • the two upper chords 1, 2 facing the mountains, which are subjected to tensile load, have a smaller cross-section than the lower chord 3, which is subjected to pressure.
  • the belt bars 1, 2, 3 are spatially fixed to one another by means of inner stiffening elements 4.
  • Each stiffening element 4 is made in one piece from a round steel rod.
  • the round steel rod is first bent flat, ie in the plane, in such a way that two equilateral triangles 5 are formed, the tips 7, 8 of which are connected to one another via two short parallel rod pieces 9.
  • the two ends 10 of the rod are collided and then butt welded together.
  • This two-dimensional structure is then deformed in a further work operation to form the three-dimensional stiffening element 4, two kinks occurring at the tips 7, 8.
  • the two triangles 5, 6 of the stiffening element 4 are arranged obliquely to the belt bars 1, 2, 3 and form an acute angle a with them.
  • the stiffening element 4 is symmetrical with respect to a central plane 15 perpendicular to the belt rods 1, 2, 3.
  • each lattice girder segment To connect two lattice girder segments, they are joined together at the joints. At the ends of each lattice girder segment, two angle irons 16 are welded with holes. The segments can then be pushed together at the ends and screwed together.
  • two plates 18 with bores 19 can be welded to the lattice girder segment on both sides.
  • a V-shaped connecting element 20 with two rows of holes 21 is pushed from below onto the ends of two adjacent lattice girder segments and screwed to the plates 18, as can be seen in FIG. 6.
  • the stiffening elements 4 are inserted at a distance from one another between the belt rods and welded manually or with a welding machine. Then the angle iron or the end plates are attached to the ends.
  • the finished lattice girder segments are only finally connected to each other on site to form the expansion frame.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Railway Tracks (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Road Paving Structures (AREA)

Abstract

1. Lattice girder for underground panel lining and shaft lining, with three parallel chord members (1, 2 and 3), which in cross-section form a triangle, being spatially fixed to one another by means of strengthening elements (4), characterised in that each strengthening element (4) consists integrally of a profiled bar bent into two triangles (5 and 6) inclined towards one another and running towards the chords members (1, 2 and 3), and that the corners of the triangles (5 and 6) are welded from the inside to the chord members (1, 2 and 3).

Description

Die Erfindung betrifft einen Gitterträger für den Untertag-Strecken- und Schachtausbau gemäß dem Oberbegriff des Patentanspruches 1. Beim Ausbau von Tunnel und Grubenstrecken in druckhaftem Gebirge werden geschweißte Gitterträger verwendet zur Herstellung gewölbter Ausbaurahmen und als Bewehrung bei der anschließenden Betonierung.The invention relates to a lattice girder for the underground line and shaft expansion according to the preamble of claim 1. When expanding tunnels and pit lines in high pressure mountains welded lattice girders are used to produce curved expansion frames and as reinforcement in the subsequent concreting.

Ein solcher Gitterträger ist beispielsweise in der DE-U-8 020 051 oder der DE-A-2 951 874 beschrieben. Er weist drei oder mehr parallele Gurtstäbe auf, die mittels zickzackförmig angeordneter, einzelner Ausfachungsstäbe fachwerkartig versteift sind. Die Knick-, Form und Querschnittsstabilität dieses Gitterträgers ist jedoch relativ klein. Die Gurtstäbe neigen unter Belastung zum Einbeulen und seitlichem Ausknicken. Die Ausfachungsstäbe sind einzeln an den Gurtstäben angeschweißt, wobei die vielen Schweißstellen eine Versprödung des Materials verursachen. Unter starker Beanspruchtung können die Schweißstellen brechen, was zum Ausscheren der Ausfachungsstäbe führt.Such a lattice girder is described for example in DE-U-8 020 051 or DE-A-2 951 874. It has three or more parallel belt bars, which are stiffened like a truss by means of individual zigzag bars arranged in zigzag fashion. The kink, shape and cross-sectional stability of this lattice girder is relatively small. The belt bars tend to buckle and buckle under load. The infill bars are individually welded to the belt bars, whereby the many welds cause the material to become brittle. The welds can break under heavy stress, which leads to the rebars being deflected.

Eine wesentliche Erhöhung der Biegesteifigkeit und Biegetragfähigkeit sowie auch der Torsionsfestigkeit kann durch mittig zwischen den Gurtstäben angeordnete Aussteifungselemente erzielt werden, wie dies aus der DE-A-27 09 242 hervorgeht. Hier werden als innere Aussteifung zusammengesetzte Blechpreßteile vorgesehen, die seitlich vorkragende, ösenartige Ansätze aufweisen, die die Gurtstäbe formschlüssig umgreifen. Die Blechpreßteile sind kompliziert in der Herstellung und entsprechend teuer. Ihr größter Nachteil liegt aber darin, daß sie einen erheblichen Spritzschatten bilden, so daß der einwandfreie Verbund der Gitterträger mit dem Beton nicht gewährleistet ist.A significant increase in the bending stiffness and bending load capacity as well as the torsional strength can be achieved by means of stiffening elements arranged centrally between the belt bars, as is evident from DE-A-27 09 242. Composite sheet metal pressed parts are provided here as inner stiffeners, which have laterally projecting, eyelet-like projections, which encompass the belt bars in a form-fitting manner. The sheet metal parts are complicated to manufacture and correspondingly expensive. Their main disadvantage is that they form a considerable splash shadow, so that the perfect bond between the lattice girder and the concrete is not guaranteed.

Ein anderer bekannter Gitterträger mit mittig angeordneten Aussteifungselementen in Form von geknickten Rundstäben, die je in einem zentralen Knoten miteinander verbunden sind, ist in der DE-A-3 014402 beschrieben. Durch die Verwendung von Rundeisen für die Aussteifung können Spritzschatten beim Betonieren vermieden werden. Die mittige Anordnung des zentralen Verbindungsbereiches jedes Aussteifungselementes innerhalb des Querschnittes deren Gurtprofile trägt zur hohen Belastbarkeit dieses Gitterträgers bei. Die Konstruktion ist relativ aufwendig, so daß solche Gitterträger zweckmäßigerweise nur dort einzusetzen sind, wo infolgen von hohem Gebirgsdruck, Geröll oder losem Gestein die Anforderungen und Beanspruchungen entsprechend groß sind.Another known lattice girder with centrally arranged stiffening elements in the form of bent round bars, which are each connected to one another in a central node, is described in DE-A-3 014402. By using round bars for the reinforcement, spray shadows can be avoided when concreting. The central arrangement of the central connection area of each stiffening element within the cross section of their belt profiles contributes to the high load-bearing capacity of this lattice girder. The construction is relatively complex, so that such lattice girders are expediently only to be used where, due to high rock pressure, rubble or loose rock, the requirements and stresses are correspondingly high.

Für verhältnismäßig standfeste Gebirge, z. B. für Ausbaustrecken in Sandstein oder Lehm, genügt ein leichterer Gitterträger, der einfacher im Aufbau ist und entsprechend billiger konstruiert werden kann. Ein solcher Gitterträger sollte aber trotzdem eine ausreichend hohe Formsteifigkeit bzw. Querschnittstabilität sowohl gegenüber Biegebeanspruchungen als auch gegenüber Beanspruchungen auf Knickung und Torsion aufweisen. Er sollte mindestens teilweise tragend eingesetzt werden können bis zum Zeitpunkt, wo er einbetoniert wird und seine Gurtstäbe die Bewehrung des endgültigen Stahlbetonausbaus bilden. Die Ausfachung muß so gestaltet sein, daß keine Spritzschatten beim Betonieren entstehen.For relatively stable mountains, e.g. B. for expansion lines in sandstone or clay, a lighter lattice girder is sufficient, which is simpler in construction and can be constructed accordingly cheaper. However, such a lattice girder should nevertheless have a sufficiently high level of dimensional stability or cross-sectional stability both against bending stresses and against stresses due to buckling and torsion. It should be possible to use it at least partially load-bearing until it is concreted in and its belt bars form the reinforcement of the final reinforced concrete structure. The infill must be designed so that there are no splash shadows when concreting.

Aufgabe der Erfindung ist es nun, einen Gitterträger zu schaffen, der diese Anforderungen erfüllt. Erfindungsgemäß erfolgt dies durch die in der Kennzeichnung des Patentanspruches 1 definierten Merkmale.The object of the invention is now to provide a lattice girder that meets these requirements. According to the invention, this is done by the features defined in the characterizing part of patent claim 1.

Aus dem DE-U-1 990 316 ist es an sich bekannt, als Versteifungselemente des Gitterträgers Verbindungsbügel vorzusehen, die aus dreieckförmig gebogenen Rundeisen bestehen, die mit ihren Enden an die Gurte angeschweißt sind. Aus FR-A-1 098 003 ist es ferner bekannt, als Versteifungselemente wellenlinienförmig gebogene Rundstäbe vorzusehen.From DE-U-1 990 316 it is known per se to provide connecting brackets as stiffening elements of the lattice girder which consist of triangularly curved round bars which are welded with their ends to the belts. From FR-A-1 098 003 it is also known to provide wavy curved round rods as stiffening elements.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen 2-8 gekennzeichnet.Further advantageous embodiments of the invention are characterized in the dependent claims 2-8.

Nachfolgend wird anhand der Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.An exemplary embodiment of the invention is explained in more detail below with reference to the drawings.

Es zeigen:

  • Fig. 1 eine perspektivische Ansicht eines Gitterträgersegmentes, vom Stoß aus gesehen,
  • Fig. 2 eine Draufsicht auf das Gitterträgersegment gemäß Fig. 1,
  • Fig. 3 eine Stirnansicht durch das Gitterträgersegment gemäß Fig. 1,
  • Fig. 4 eine Draufsicht auf ein Versteifungselement,
  • Fig. 5 eine Seitenansicht des Gitterträgersegmentes gemäß Fig. 1,
  • Fig. 6 eine Seitenansicht auf die Stoßstellen zweier Gitterträgersegmente, die mittels Verbindungselementen miteinander zusammengeschraubt sind, und
  • Fig. einen Schnitt nach der Linie VI-VI gemäß Fig. 1 durch die Stoßstelle der Gitterträgersegmente.
Show it:
  • 1 is a perspective view of a lattice girder segment, seen from the joint,
  • 2 shows a plan view of the lattice girder segment according to FIG. 1,
  • 3 shows an end view through the lattice girder segment according to FIG. 1,
  • 4 is a plan view of a stiffening element,
  • 5 shows a side view of the lattice girder segment according to FIG. 1,
  • Fig. 6 is a side view of the joints of two lattice girder segments, which are screwed together by means of connecting elements, and
  • Fig. A section along the line VI-VI of FIG. 1 through the joint of the lattice girder segments.

Der in den Figuren dargestellte Gitterträger weist drei parallele Gurtstäbe 1, 2, 3 auf, die im Normalschnitt ein Dreieck bilden. Die beiden dem Gebirge zugekehrten Obergurte 1,2, die bei Belastung auf Zug beansprucht werden, weisen einen kleineren Querschnitt auf als der Untergurt 3, der auf Druck beansprucht wird. Es wäre aber auch möglich, die Querschnitte aller Gurtstäbe gleich auszubilden. Die Gurtstäbe 1,2,3 sind mittels innerer Versteifungselemente 4 räumlich zueinander fixiert.The lattice girder shown in the figures has three parallel belt bars 1, 2, 3, which form a triangle in normal section. The two upper chords 1, 2 facing the mountains, which are subjected to tensile load, have a smaller cross-section than the lower chord 3, which is subjected to pressure. However, it would also be possible to design the cross sections of all of the belt rods in the same way. The belt bars 1, 2, 3 are spatially fixed to one another by means of inner stiffening elements 4.

Jedes Versteifungselement 4 ist einstückig aus einem Rundstahlstab hergestellt. Wie aus der Fig. 4 hervorgeht, wird der Rundstahlstab zuerst flach, d. h. in der Eben, gebogen, derart, daß zwei gleichseitige Dreiecke 5, entstehen, deren Spitzen 7, 8 über zwei kurze parallele Stabstücke 9 miteinander verbunden sind. Die beiden Enden 10 des Stabes werden zusammengestoßen und dann stumpf zusammengeschweißt. Dieses zweidimensionale Gebilde wird anschließend in einer weiteren Arbeitsoperation zum dreidimensionalen Versteifungselement 4 verformt, wobei an den Spitzen 7,8 zwei Knicke entstehen.Each stiffening element 4 is made in one piece from a round steel rod. As can be seen from FIG. 4, the round steel rod is first bent flat, ie in the plane, in such a way that two equilateral triangles 5 are formed, the tips 7, 8 of which are connected to one another via two short parallel rod pieces 9. The two ends 10 of the rod are collided and then butt welded together. This two-dimensional structure is then deformed in a further work operation to form the three-dimensional stiffening element 4, two kinks occurring at the tips 7, 8.

Die Ecken 7,11,12 bzw. 8, 13, 14 der Dreiecke 5, 6 werden nun innen an den Gurtstäben 1, 2, 3 angeschweißt, wobei die Spitzen 7, 8 mit dem Verbindungsstück 9 am inneren Gurtstab 3, befestigt und die beiden Basisecken 11, 12 bzw. 13, 14 an den äußeren Gurtstäben 1, 2 angeschweißt werden.The corners 7, 11, 12 and 8, 13, 14 of the triangles 5, 6 are now welded to the inside of the belt bars 1, 2, 3, the tips 7, 8 being fastened to the inner belt bar 3 with the connecting piece 9 and the Both base corners 11, 12 and 13, 14 are welded to the outer belt rods 1, 2.

Die beiden Dreiecke 5, 6 des Aussteifungselementes 4 sind schräg zu den Gurtstäben 1, 2, 3 angeordnet und schließen mit diesen einen spitzen Winkel a ein. Das Versteifungselement 4 ist symmetrisch ausgebildet in bezug auf eine zu den Gurtstäben 1, 2, 3 senkrechte Mittenebene 15.The two triangles 5, 6 of the stiffening element 4 are arranged obliquely to the belt bars 1, 2, 3 and form an acute angle a with them. The stiffening element 4 is symmetrical with respect to a central plane 15 perpendicular to the belt rods 1, 2, 3.

Die vorstehend beschriebene Konstruktion des Gitterträgers weist folgende Vorteile auf:

  • - Das Rundmaterial ist einfach erhältlich und versucht keine Spritzschatten beim Ausbetonieren. Dies ist wichtig, da der Gitterträger voll im Beton eingegossen wird und als Bewehrung dient.
  • - Die Konstruktion ist sehr stabil trotz sehr geringen Materialaufwandes. Die einzelnen Fachwerk-Aussteifungsstrecken sind sehr kurz, da das Aussteifungselement innen an den Gurtstäben angeschweißt wird.
  • - Da das Versteifungselement einstückig ausgebildet ist, erfolgt dessen Verbindung mit den Gurtstäben an relativ wenigen Schweißstellen, was eine entsprechend geringe Versprödung des Materials durch das Schweißen bewirkt.
  • - Infolge der einstückigen Ausbildung ist es auch nicht notwendig, einzelne Ausfachungsstäbe vorzusehen, die einzeln verschweißt werden und bei starker Belastung leicht ausbrechen können.
  • - Die Enden des Versteifungselementes sind gegeneinandergestoßen und stumpf verschweißt, so daß auch hier kein überschüssiges Material durch Überlappungen entsteht.
The construction of the lattice girder described above has the following advantages:
  • - The round material is easily available and does not attempt any spray shadows when concreting. This is important because the lattice girder is fully cast in the concrete and serves as reinforcement.
  • - The construction is very stable despite very little material. The individual truss stiffening sections are very short, since the stiffening element is welded to the inside of the belt bars.
  • - Since the stiffening element is formed in one piece, its connection to the belt rods takes place at relatively few welding points, which causes a correspondingly low embrittlement of the material by the welding.
  • - As a result of the one-piece design, it is also not necessary to provide individual infill bars, which are welded individually and can easily break out under heavy loads.
  • - The ends of the stiffening element are butted and butt welded, so that here too no excess material is created by overlaps.

Zum Verbinden zweier Gitterträgersegmente werden diese an den Stößen miteinander verbunden. An den Enden jedes Gitterträgersegmentes werden zwei Winkeleisen 16 mit Bohrungen angeschweißt. Die Segmente können sodann an den Enden zusammengestoßen und zusammengeschraubt werden.To connect two lattice girder segments, they are joined together at the joints. At the ends of each lattice girder segment, two angle irons 16 are welded with holes. The segments can then be pushed together at the ends and screwed together.

Um einen Längenausgleich zu erzielen, können anstatt der Winkeleisen 16 zwei Platten 18 mit Bohrungen 19 beidseitig am Gitterträgersegment angeschweißt werden. Ein V-förmig gebogenes Verbindungselement 20 mit zwei Bohrungsreihen 21 wird von unten auf die Enden zweier benachbarter Gitterträgersegmente aufgeschoben und mit den Platten 18 verschraubt, wie dies aus der Figur 6 hervorgeht.In order to achieve a length compensation, instead of the angle iron 16, two plates 18 with bores 19 can be welded to the lattice girder segment on both sides. A V-shaped connecting element 20 with two rows of holes 21 is pushed from below onto the ends of two adjacent lattice girder segments and screwed to the plates 18, as can be seen in FIG. 6.

Zur rationellen Herstellung der Gitterträgersegmente empfiehlt es sich, die Versteifungselemente in speziellen Lehre vorzufertigen. Sodann werden die oberen und unteren Gurtstäbe mit dem gewünschten Krümmungsradius vorgebogen und ebenfalls in eine Lehre gelegt, um sie räumlich zueinander zu fixieren. Nun werden die Versteifungselemente 4 im Abstand voneinander zwischen die Gurtstäbe eingelegt und manuell oder mit einer Schweißmaschine verschweißt. Anschließend werden an den Enden die Winkeleisen oder die Endplatten befestigt. Die fertigen Gitterträgersegmente werden erst an Ort und Stelle miteinander definitiv verbunden, um den Ausbaurahmen zu bilden.For the rational manufacture of the lattice girder segments, it is advisable to prefabricate the stiffening elements in a special teaching. Then the upper and lower belt rods are pre-bent with the desired radius of curvature and also placed in a jig to fix them spatially to each other. Now the stiffening elements 4 are inserted at a distance from one another between the belt rods and welded manually or with a welding machine. Then the angle iron or the end plates are attached to the ends. The finished lattice girder segments are only finally connected to each other on site to form the expansion frame.

Claims (8)

1. Lattice girderfor underground panel lining and shaft lining, with three parallel chord members (1, 2 and 3), which in cross-section form a triangle, being spatially fixed to one another by means of strengthening elements (4), characterised in that each strengthening element (4) consists integrally of a profiled bar bent into two triangles (5 and 6) inclined towards one another and running towards the chords members (1, 2 and 3), and that the corners of the triangles (5 and 6) are welded from the inside to the chord members (1, and 3).
2. Lattice girder according to Claim 1, characterised in that the ends of the profiled bar are battened against one another and butt welded to one another.
3. Lattice girder according to Claim 1 or 2, characterised in that the two apexes (7 and 8) of the triangles (5 and 6) are connected to one another by a connecting piece (9).
4. Lattice girder according to Claim 3, characterised in that the apexes (7 and 8) of the triangles (5 and 6) are fixed to the inner chord member (3), and the base corners (11 and 12 or 13 and 14 respectively) are fixed to the outer chord members (1 and 2).
5. Lattice girder according to one of Claims 1 to 4, characterised in that the strengthening element (4) is symmetrical relative to a centre plane (15) running at rightangles to the chord members (1, and 3).
6. Lattice girder according to one of Claims 1 to 5, characterised in that it is assembled from lattice girder segments the butt ends of which each have two angle irons (16) welded laterally to the chords members, and that in each case two adjacent angle irons (19) are bolted to one another.
7. Lattice girder according to one of Claims 1 to 5, characterised in that it is assembled from lattice girder segments the butt of which each have two perforated plates (18) welded laterally to the chord members, and that a V-shaped connecting element (20) is pushed onto the chords members (1, 2 and 3) in the butt area and bolted to the perforated plates (18).
8. Lattice girder according to Claim 7, characterised in that the connecting element has two rows (21) of holes which can be used selectively for bolting.
EP82810334A 1981-09-01 1982-08-09 Grid-like girder for the support of underground galleries and shafts Expired EP0073733B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82810334T ATE13577T1 (en) 1981-09-01 1982-08-09 LATTICE CARRIER FOR UNDERGROUND RAIL AND SHAFT EXTENSION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19818125375U DE8125375U1 (en) 1981-09-01 1981-09-01 Lattice girder for the underground track and shaft expansion
DE8125375U 1981-09-01

Publications (2)

Publication Number Publication Date
EP0073733A1 EP0073733A1 (en) 1983-03-09
EP0073733B1 true EP0073733B1 (en) 1985-05-29

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EP82810334A Expired EP0073733B1 (en) 1981-09-01 1982-08-09 Grid-like girder for the support of underground galleries and shafts

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EP (1) EP0073733B1 (en)
AT (1) ATE13577T1 (en)
DE (2) DE8125375U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19835557B4 (en) * 1998-08-06 2008-05-29 Bochumer Eisenhütte Heintzmann GmbH & Co. KG Stackable lattice girder removal frame and stiffeners for this frame
EP2918772A2 (en) 2014-03-14 2015-09-16 Bochumer Eisenhütte Heintzmann GmbH&Co. Kg Expansion system for underground tunnels or routes

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH672816A5 (en) * 1986-10-03 1989-12-29 Pantex Stahl Ag
DE3722609C1 (en) * 1987-07-09 1988-08-18 Tunnel Ausbau Technik Gmbh Extension arch for tunnel construction
CH677954A5 (en) * 1989-02-01 1991-07-15 Pantex Stahl Ag
GB2287729B (en) * 1994-07-07 1997-07-23 Tunnel Ausbau Technik Gmbh Connecting element and lattice girder interconnected with a plurality of said elements
DE19616444C2 (en) * 1995-07-29 1998-02-12 Seiz Rudolf Lattice girders for track and tunnel construction as well as stiffening elements for the manufacture of a lattice girder
DE19711627C2 (en) * 1996-12-02 1997-12-11 Seiz Rudolf Lattice girder removal frame and stiffening elements for a lattice girder removal frame
DE10336154B4 (en) * 2003-08-07 2006-09-21 Bochumer Eisenhütte Heintzmann GmbH & Co. KG Parallel belt girder, especially for track extension and tunnel construction
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DE202010004389U1 (en) * 2010-03-31 2010-07-01 Bochumer Eisenhütte Heintzmann GmbH & Co. KG girder
DE102012108471B3 (en) 2012-09-11 2013-09-26 Bochumer Eisenhütte Heintzmann GmbH & Co. KG girder
DE102012108479A1 (en) * 2012-09-11 2014-03-13 Bochumer Eisenhütte Heintzmann GmbH & Co. KG girder
DE102014010212B3 (en) * 2014-07-10 2015-12-24 Bochumer Eisenhütte Heintzmann GmbH & Co. KG Girder connection
CN113503173B (en) * 2021-07-12 2023-07-14 内蒙古工业大学 Mine roadway support steel arch frame and installation method thereof

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DE19835557B4 (en) * 1998-08-06 2008-05-29 Bochumer Eisenhütte Heintzmann GmbH & Co. KG Stackable lattice girder removal frame and stiffeners for this frame
EP2918772A2 (en) 2014-03-14 2015-09-16 Bochumer Eisenhütte Heintzmann GmbH&Co. Kg Expansion system for underground tunnels or routes
DE102014103477A1 (en) 2014-03-14 2015-09-17 Bochumer Eisenhütte Heintzmann GmbH & Co. KG Removal system for underground tunnels or lines, expansion unit and arch segment

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DE3263900D1 (en) 1985-07-04
ATE13577T1 (en) 1985-06-15
DE8125375U1 (en) 1982-01-21
EP0073733A1 (en) 1983-03-09

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