THEORETICAL AND EXPERIMENTAL STUDIES OF A TUNNEL FACE IN A GRAVEL SITE. PART 2: EXPERIMENTAL AND NUMERICAL ANALYSIS. NUMERICAL MODELS IN GEOMECHANICS. NUMOG III. PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM HELD IN NIAGARA FALLS, CANADA, 8-11 MAY 1989

This paper presents the experimental and numerical analysis undertaken during the construction of the Lyon subway tunnel through non cohesive sand gravel alluvium. The geology of the instrumented section of the tunnel and the physical and mechanical characteristics of the ground are described. Details of the instruments installed in the instrumented section of the tunnel are also provided. Instrumentation included: inclinometers, multiple anchor point extensometers, and pore pressure cells. A topographical study was also undertaken. The objective was to measure horizontal and vertical displacement of the overburden crossed by the shield tunnelling apparatus and the excess pore water pressure ahead of the tunnel face. Details of the measurements taken are provided and compared with those obtained by limit equilibrium, continum mechanic and finite element analyses. The laboratory and in situ test results and the 3 dimensional finite element analyses validated those obtained by 3 dimensional limiting equilibrium analysis. This analysis emphasises the influence of the pressure gradient at the tunnel face in sandy gravel soil and provides a safety factor. For the abstract of part 1 of this paper see IRRD 824083 and for the covering abstract of the conference see IRRD 824029.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1851664254
• Corporate Authors:

  Elsevier Science Publishers

  Crown House, Linton Road
  Barking, Essex IG11 8JU,   England 
• Authors:
  • Monnet, J
  • Chaffois, S
  • Chapeau, C
  • Mohkam, M
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 505-14
• Serial:
  • Publication of: Elsevier Applied Science Publishers Limited
  • Publisher: Elsevier Science Publishers

Subject/Index Terms

• TRT Terms: Conferences; Excavation; Excavations; Finite element method; Mathematical models; Measuring instruments; Modulus of elasticity; Motion; Mud; Pore water pressures; Pressure; Shielding (Tunneling); Stability (Mechanics); Subways; Tunnels
• Uncontrolled Terms: Horizontal; Vertical
• Subject Areas: Bridges and other structures; Data and Information Technology;

Filing Info

• Accession Number: 00497958
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 1-85166-425-4
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM