THREE-DIMENSIONAL STRESS RELAXATION PROCESSES IN THE VICINITY OF THE TUNNELLING FACE

DREIDIMENSIONALE SPANNUNGSUMLAGERUNGSPROZESSE IM BEREICH DER ORTSBRUST

The problems of tunnelling in unstable strata are substantially determined by the three-dimensional behaviour in the vicinity of the tunnel face, the method of advance and support and the rate of advance in relation to the time the rock is unsupported. The present paper represents a summary of two comprehensive experimental works, which arrive at some remarkable results partly by unconventional methods. Both the three-dimensional stress relaxation as well as the time-dependent structural behaviour of underground cavities were investigated by measurements in actual tunnel projects and also in comparable equivalent models. Some of the results of these investigations are A stress-relieved zone around the tunnel face, followed by stress concentrations or convergence discontinuities one or two diameters behind the face, an undulating stress distribution in the rock and an abrupt time-dependent relaxation of stress peaks in relation to the rate of advance and the time without support. The limits of the conceptual model of the mechanics of continua are revealed. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/3211814981
• Corporate Authors:

  Springer Verlag

  175 5th Avenue
  New York, NY  United States  10010
• Authors:
  • Mueller-salzburg, L
  • Sauer, G
  • Vardar, M
• Publication Date: 1978-10

Language

• German

Media Info

• Features: Figures; References;
• Pagination: p. 67-85
• Serial:
  • Rock Mechanics
  • Volume: SUPP

Subject/Index Terms

• TRT Terms: Conferences; Continuous structures; Excavation and tunneling; Mathematical models; Measurement; Mechanical stability; Mechanics; Mountains; Stresses; Structural analysis; Structural mechanics; Time; Tunneling; Tunnels
• Uncontrolled Terms: Models; Structural behavior
• ITRD Terms: 8525: Conference; 9006: Continuous; 6136: Measurement; 5455: Mechanics; 6205: Model (not math); 4048: Mountain; 5930: Stability; 5575: Stress (in material); 5573: Stress analysis; 5414: Time; 3374: Tunnel
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; I43: Rock Mechanics; I54: Construction of Tunnels;

Filing Info

• Accession Number: 00309747
• Record Type: Publication
• Source Agency: Bundesanstalt für Straßenwesen (BASt)
• ISBN: 3-211-81498-1
• Report/Paper Numbers: Supplement
• Files: ITRD, TRIS
• Created Date: Jun 26 1980 12:00AM