A CRITICAL RE-APPRAISAL OF THE INCREMENTAL STRESS-STRAIN THEORY FOR NORMALLY CONSOLIDATED CLAYS

The incremental stress-strain theory of Roscoe & Poorooshasb (1963) is presented (in a slightly different form) with respect to shear strains. A comprehensive series of stress-controlled triaxial tests was carried out and the results were compared with the predictions of the theory. The stress ratio-shear strain relationship of normally consolidated specimens sheared under undrained condition was unique and was independent of the consolidation pressure. Also, provided that the effect of the initial one-dimensional consolidation stress is absent, the state boundary surface is unique for all types of tests including anisotropic consolidation. During anisotropic consolidation, the strain increment ratio was a constant and the void ratio varied linearly with the logarithm of the mean normal stress (the slope of the line is the same as that for isotropic consolidation). The volumetric strains in all types of tests on normally consolidated clays may be successfully predicted from the state boundary surface as obtained from undrained tests. However, the shear strains may only be predicted for paths in which the stress ratio increases or remains constant. (A) /TRRL/

  • Availability:
  • Corporate Authors:

    Southeast Asian Society of Soil Engineering

    P.O. Box 2754
    Bangkok,   Thailand 
  • Authors:
    • BALASUBRAMANIAM, A S
  • Publication Date: 1975-6

Media Info

  • Features: Figures; References;
  • Pagination: p. 15-32
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00133770
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Aug 23 1976 12:00AM