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
  • E21D9/005—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by forcing prefabricated elements through the ground, e.g. by pushing lining from an access pit

Definitions

• the invention relates to a method for producing a tunnel structure under an existing structure, wherein the tunnel structure is pressed through under the existing structure and the soil in the area of the cutter construction arranged on the tunnel side is removed parallel to the advance of the tunnel structure, and the existing structure is removed by the Installation of stabilization plates against ground movements is secured when driving the tunnel structure.
• German Offenlegungsschrift 37 25 710 describes a method for producing a tunnel structure of the type in question, with which ground movements above the tunnel structure can be avoided with great certainty.
• a sheet steel sheet which is roughly the width of the tunnel structure, is arranged between the tunnel structure and the floor covering it parallel to the driving of the tunnel structure.
• the steel smell track is held in the area of the starting pit and extended on the face of the tunnel according to the advance of the tunnel structure by welding further sheet metal panels to the front, protruding end of the sheet steel track.
• the invention is therefore based on the object of designing and developing the known method for producing a tunnel structure such that, in addition to minimizing the friction occurring during tunneling between the tunnel structure and the ground above it, the ground in the area of the cutting edge construction is stabilized in such a way that the existing structure is well supported during the tunnel construction.
• the method according to the invention for producing a tunnel structure achieves the above object by means of the features of patent claim 1.
• the stabilizing plates are then installed in the floor in an open construction and connected to one another before the tunnel structure is pressed through.
• the stabilizing plates are provided with reinforcing bars on the ground side.
• metal sheets can not only be used to reduce the friction between the tunnel structure and the ground in question during pressing-through, but that metal sheets of suitable thickness and material properties can also be used to stabilize or support floor areas .
• the stabilizing plates are advantageously installed in the ground in advance of the pressing measure in an open design. Thicker sheets can also be used. This also simplifies the fixing of the interconnected stabilizing plates in the floor.
• the load-bearing capacity of the stabilizing plates can be increased considerably if the stabilizing plates are provided with reinforcing members on the terrain side.
• the reinforcement beams additionally ensure a durable connection between the individual stabilizing plates and good interlocking with the adjacent floor, so that they also serve to fix the stabilizing plates.
• the interlocking of the reinforcement beams with the existing floor prevents slipping of the stabilizing plates during the pressing-through measure as well as a floor movement 5 above the stabilizing plates.
• the stabilizing plates are not only arranged in the area above the end position of the tunnel structure, but cover a larger area, which is easily possible by installing the stabilizing plates in an open construction.
• the loads occurring in the area of the cutting edge construction can be introduced into the intact floor via the stabilizing plates and the reinforcement beams.
• the stabilizing plates are installed in the expected height of the upper edge of the tunnel structure. This can reduce the Q friction that occurs when driving the tunnel structure in the ceiling area, and the associated damage to the tunnel structure in the ceiling area can be prevented.
• the stabilizing plates can also be used to stabilize the position of the tunnel structure during tunneling.
• steel sheets as stabilizing sheets and steel beams as reinforcing beams has proven to be particularly advantageous. Leave these components connect to each other simply and reliably by welding and thus form an easy-to-install support system with a high load-bearing capacity.
• the end of a tunnel structure on the driving side is equipped with a cutting construction for the through-pressing.
• This comprises two cutting edges formed in the extension of the side walls of the tunnel structure.
• the cutting edges are connected to one another in the ceiling area by at least one support bracket.
• the cutter construction also comprises spaced longitudinal members which are integrated on one side in the ceiling of the tunnel structure and practically represent an extension of the structure ceiling to the front edge of the cutting edges.
• the support bracket forms a load-bearing cover in the cutting area together with the side members.
• the reinforcement beams are arranged essentially parallel to the expected orientation of the longitudinal beams of the hood.
• the longitudinal members are pushed forward directly under the stabilizing plates when the tunnel structure is being driven. Due to the spacing between the side members, the ground displaced during tunneling can move between the side members into the interior of the tunnel structure and be removed from there.
• the stabilization plates installed below the existing structure in accordance with the method according to the invention not only serve to secure the ground against ground movements, but also represent a guide for the tunnel structure during the pressing.
• the cutting edges are in the region of the Sole of the tunnel structure and possibly also the sole itself in which the Cutting adjoining area rounded so that a so-called working space is formed in the front area, that is to say on the driving side, during the pressing-through between the base of the tunnel structure and the ground in front.
• the alignment of the tunnel structure during the pressing can now be influenced in a defined manner by suitable excavation of soil material by soil replacement or soil improvement in this working area in the front sole area of the tunnel structure.
• the method according to the invention is particularly suitable for producing a tunnel structure under an existing track system.
• the tracks To install the stabilizing plates before pressing the tunnel structure through, the tracks must first be removed and then reinstalled, whereby train traffic cannot be maintained. After the stabilizing sheets have been installed, the rail operation is, if at all, only slightly affected by the press-through measure.
• FIG. 1 shows a longitudinal section through a railway embankment through which a tunnel structure is pressed
• FIG. 2 is a top view of the situation shown in FIG. 1,
• Fig. 3 shows a cross section through the situation shown in Figs. 1 and 2 in
• Fig. 4 shows the view of the cutting area.
• Fig. 1 shows a railway embankment 1, on which three tracks 2 to 4 run. Through the railway embankment 1, a tunnel structure 5 is pressed, which consists of three building segments 6, 7 and 8. The tunnel structure 5 is provided on the driving side with a cutting construction 9, which is explained in more detail in connection with FIGS. 3 and 4.
• stabilizing plates 10 in an open construction were installed in the floor below the track system and connected to one another before the tunnel structure was pressed through.
• the stabilizing plates 10 were also provided with reinforcing members 11 on their top side, that is to say on the terrain side.
• the tracks 2 to 4 in the area of the end position of the tunnel structure 5 and here also in the immediately adjacent areas were removed and reinstalled after the installation of the stabilization sheets 10 and the attachment of the reinforcement beams 11. To do this, tracks 2 to 4 had to be closed.
• the stabilizing plates 10, together with the reinforcing members 11, therefore cover not only the area under which the tunnel is to run, but also the immediately adjacent areas, so that occurring loads can be introduced into the adjoining floor via the stabilizing plates 10 and reinforcing members 11 .
• the stabilization plates are here laterally about 0.5 m beyond the tunnel frame, which is particularly illustrated in Fig. 2.
• the connected stabilizing plates 10 are fixed in the floor. An additional fixation occurs via the interlocking of the reinforcement beams 11 connected to the stabilizing plates 10 with the ground in question.
• the stabilization plates 10 have been installed in the expected height of the upper edge of the tunnel structure 5. Therefore, the cutting construction 9 is guided in the head region of the tunnel structure 5 directly under the stabilizing plates 10.
• Fig. 2 illustrates that the reinforcement beams 11 are oriented transversely to the direction of the track.
• the track axes are designated 12, 13 and 14 here.
• the reinforcement beams 11 arranged in parallel increase the rigidity of the stabilizing plates 10 which are connected to one another and enlarge the support area in the area of the tracks 3 and 4.
• the train traffic can also be maintained above the face, since the reinforcement beams 11 preclude direct loading of the face slope 15.
• the loads from the tracks 3 and 4 are namely removed with the aid of the reinforcement beams 11 on the one hand on the finished tunnel structure 5 and on the other hand in a floor area sufficiently far from the face 15.
• Fig. 3 shows a cross section through the embankment 1 in the cutting area.
• the cutting construction 9 comprises two cutting edges 16, 17 which are formed in the extension of the side walls of the tunnel structure 5 and which are connected to one another in the ceiling area via an interception carrier 18.
• On the support beam 18 are arranged in an extension of the ceiling of the tunnel structure 5 and on one side integrated longitudinal beams 19.
• Fig. 3 illustrates that the longitudinal beams 19 are guided directly under the stabilizing plates 10 when driving the tunnel structure 5 and that the reinforcement beams 11 are oriented as parallel as possible to the longitudinal beams 19 of the cutter structure 9.
• the stabilizing plates 10 thus practically form a type of guide for the tunnel structure 5.
• FIG. 4 shows a side view of the cutting edge construction 9.
• the two cutting edges 16 and 17 are rounded here by the dimension b in the region of the base of the tunnel structure 5 and the cutting edge flux is drawn by the dimension a in front of the structure base, so that when the Tunnel structure 5 forms a so-called work space under the cutting edges 16 and 17.
• the alignment of the tunnel structure 5 can be influenced in a defined manner by targeted excavation of soil material, by soil exchange or soil improvement in this work area.

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• 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)
• Lining And Supports For Tunnels (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=7828190

Family Applications (1)

Country Status (5)

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Family Cites Families (9)

• 1997
  • 1997-06-13 DE DE19725089A patent/DE19725089A1/de not_active Ceased
• 1998
  • 1998-04-28 AT AT98932015T patent/ATE200137T1/de active
  • 1998-04-28 WO PCT/DE1998/001171 patent/WO1998049425A1/fr not_active Ceased
  • 1998-04-28 PL PL98333502A patent/PL333502A1/xx unknown
  • 1998-04-28 DE DE59800577T patent/DE59800577D1/de not_active Expired - Lifetime
  • 1998-04-28 EP EP98932015A patent/EP0979346B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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