IMPROVEMENT OF GROUND-SUPPORT PERFORMANCE BY FULL CONSIDERATION OF GROUND DISPLACEMENTS

A conceptual description of the ground behaviour around a tunnel and a quantitative analysis of the effects of the more important factors that influence tunnel support loads are presented. Axisymmetric finite element models of the advancing tunnel were used for the quantitative analysis. The variables considered in the investigation were the relative stiffness of the ground and the support, the constitutive behavior of the ground, and the delay of support installation. The conclusions of the study are that decreasing the relative stiffness of the support or increasing the delay of the support installation generally reduces the forces in the tunnel support but at the same time may induce greater amounts of detrimental yielding in the ground mass. Comments on the optimization or minimization of tunnel support loads are also included. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 14-20
  • Monograph Title: Tunneling and underground structures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00196624
  • Record Type: Publication
  • ISBN: 0309028299
  • Files: TRIS, TRB
  • Created Date: Aug 28 1979 12:00AM