ANALYSIS OF FIELD PERFORMANCE -- THE THUNDER BAY TUNNEL

A numerical method for the calculation of the distribution of displacements for tunnelling in clays has been developed. The method employs an orthotropic elastic-perfectly plastic soil model that takes into account various sources of ground loss and soil-lining interaction. Both undrained and drained analyses have been carried out and the results are compared with the measured soil displacements of two instrumented arrays at the Thunder Bay tunnel. It is shown that the range of maximum settlements, the shape of the settlement troughs, and the pore pressure change, as well as the magnitude and direction of spatial displacements obtained from the analyses, compare reasonably well with the results of field measurements for both short- and long-term conditions. (Author)

• Corporate Authors:

  National Research Council of Canada

  1200 Montreal Road
  Ottawa, Ontario  Canada  K1A 0R6
• Authors:
  • Ng, RMC
  • Lo, K Y
  • Rowe, R K
• Publication Date: 1986-2

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 30-50
• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Volume: 23
  • Issue Number: 1
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Clay; Dislocation (Geology); Information processing; Methodology; Performance; Pore pressure; Settlement (Structures); Tunneling
• Uncontrolled Terms: Field performance
• Old TRIS Terms: Computing
• Subject Areas: Bridges and other structures; Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00457813
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 31 1986 12:00AM