Evidence is quoted to show why it is theoretically wrong and dangerous to substitue total stress shear strength parameters onto what is really an effective stress failure surface. The error is obvious if the total stress undrained shear strength parameter, C, is substituted onto the observed failure surface in the compression test to calculate the unconfined compresive strength. Although not strictly theoretically correct, it would not be too much in error if effective shear strength parameters c' and phi' were substituted onto the actual failure surface - but certainly not total shear strength parameters. The true phi=0 analysis safety factor described by the authors must therefore be in the range from 1.7 - 1.21 and not 1.27 - 1.36.

  • Corporate Authors:


    Sacramento California 95814
    ,   United States 
  • Discussers:
    • Cox, J B
  • Publication Date: 1975-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00131542
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11674 Proceeding
  • Files: TRIS
  • Created Date: May 14 1976 12:00AM