STRESS VARIATION AND PORE PRESSERES WITH DISCUSSION

The symposium on laboratory shear testing of soils, sponsored by ASTM Committee D-18 on soils for engineering purposes and the National Research Council of Canada, was held in four sessions from September 9 to 11, 1963 in Ottawa, Canada. T. William Lambe presents a general report on the papers in the second session of the symposium. The symposium was entitled "Stress Variation and Pore Pressures." Dr. Blight's paper is concerned with nonuniform distribution of pore pressure which tends to occur during the triaxial testing of fine-grained soils. Mr. Crawford is also primarily concerned with variations in pore pressure throught a test specimen during shear. The Biggs paper is the only one concerned with partially saturated soils. It describes the test equipment and test procedure for determining the negative pore water pressure existing in a compacted soil. The Henkel and Sowa paper presents the results of triaxial tests on the Weald clay in which both isotropic and anisotropic types of initial consolidation are employed. Mr. Simons presents the results from six different types of triaxial tests on five undistrubed clays to show that the shearing resistance with respect to effective stress is essentially independent of the stress path followed to failure, provided the failure criterion of maximum principal effective stress ratio is employed. Konder and Zelasko show empirically that the influence of void ratio on the response to a sand tested in triaxial compression with octahedral normal stress controlled can be expressed in terms of a two-constant hyperbolic stress-strain relation. Jurez-Badillo develops an expression for the excess pore pressure in a stressed soil in terms of the normal and shear stresses on the octahedral plane. The Poorooshasb and Roscoe paper describes a graphical technique for predicting the strain undergone by a normally consolidated specimen of saturated, remolded kaolinite when subjected to a stress increment in a triaxial compression test. These reviews are followed by a brief discussion.

  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Lambe, T W
  • Discussers:
    • POOROOSHASB, H B
  • Publication Date: 1963-9

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  • Accession Number: 00095098
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 7 1975 12:00AM