The results are presented of the centrifuge tests performed on an instrumented model tunnel: (a) supported over one half of its length by a rigid base (sandstone bedrock condition), with the other half embedded in loose sand, and subjected to simulated earthquake; and (b) subjected to a scaled fault displacement with the tunnel covered by a correctly scaled depth of dry soil. The finite element analysis is described, and the results of the calculations are presented. It was found that for the infinite, segmented, concrete prototype tunnel on which the centrifuge modeling and numerical analysis were based, even a 2-ft vertical fault displacement causes computed longitudinal tunnel stresses which would certainly fail the proposed tunnel. Greater stresses are developed by the expected maximum vertical fault displacement of 3.7 ft. Other study findings and their impact on design are discussed.

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: p. 949-967
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00486754
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 31 1989 12:00AM