The discussers note the authors' failure to consider recent developments in this field, and comment on the authors consideration of stress-strain anisotropy with preferential orientation of particles. It has been shown that undrained strength and stress-strain anisotropy in cohesive soils are essentially influence by the anisotropic stresses experienced by the soil in situ, even though fabric anisotropy also does contribute independently to a small extent to the observed gross anisotropic response. This fact explains why significant anisotropy is not observed in the strength parameters adopting the conventional isotropically consolidated triaxial compression test on specimens at different orientations. It has also been suggested that a more appropriate way to obtain the strength parameters (and pore pressure parameters) would be to adopt the "truly triaxial apparatus." Reexamination is urged of the authors' method to evaluate anisotropic responses using hollow cylindrical samples subjected to axial and torsional stress. Attention is drawn to a standard procedure for evaluating strength anisotropy consisting of a triaxial extension compression test and direct simple shear test. It is also noted that because soils do possess different strengths in different directions, there cannot be a unique relationship between water content and strength.

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  • Accession Number: 00148209
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #12536
  • Files: TRIS
  • Created Date: Mar 15 1977 12:00AM