HIGHLY STRESSED AREAS AT TUNNEL DRIVING UNDER LOW OVERBURDEN

KRITISCHE ZONEN BEIM AUFFAHREN OBERFLAECHENNAHER TUNNEL NACH DER NEUEN OESTERREICHISCHEN TUNNELBAUWEISE (NOT)

By example of tunneling in Frankfurt Clay the conditions of three-dimensional load bearing process were studied. The nonlinear deformation behavior of the clay depends on the actual state of stress and the stress path as well. The so-called "dynamic" process of tunnel driving is simulated by sucessive removing of those elements which are situated within the full section. The shotcrete lining is simulated by activating the corresponding elements in that moment, when the actual ring closure is executed. The deformation progress in a chosen cross section can be simulated quite well by means of the three-dimensional computation model. Around the tunnel a zone arises, where the soil is stressed to the limit of its strength. This zone is typical for tunnel driving by New Austrian Tunneling Method. The zone is screened by the arch. The height of the three-dimensional load bearing arch depends on the dimension of the highly stressed zone and with it from the tunnel profile, the depth of the tunnel, the soil strength and the ring closure time.

• Supplemental Notes:
  • Ingenieurgeol und Geomech im Talsperren- und Tunnelbau, Vortr Des Geomech-Kolloq der Oesterr Ges fuer Geomech, 29th Salzburg, Austria, Oct, 9-10 1980.
• Corporate Authors:

  Springer Verlag

  175 5th Avenue
  New York, NY  United States  10010
• Authors:
  • KATZENBACH, R
  • Breth, H
• Publication Date: 1981

Language

• German

Media Info

• Features: References;
• Pagination: p. 187-201
• Serial:
  • Rock Mechanics, Felsmechanik, Mecanique des Roches
  • Issue Number: 11
  • Publisher: Springer Verlag

Subject/Index Terms

• TRT Terms: Deformation; Soils; Tunnel lining; Tunneling machines
• Identifier Terms: New Austrian Tunneling Method
• Uncontrolled Terms: Soil conditions
• Subject Areas: Construction; Geotechnology; Public Transportation;

Filing Info

• Accession Number: 00362107
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 30 1982 12:00AM