ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 17

Effects of Anisotropic Versus Isotropic Consolidation in Consolidated-Undrained Triaxial Compression Tests of Cohesive Soils

Donaghe, RT
Civil engineering technician and research civil engineerMembers of ASTM, Soils Research Facility, U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, Miss.

Townsend, FC
Civil engineering technician and research civil engineerMembers of ASTM, Soils Research Facility, U.S. Army Corps of Engineers Waterways Experiment Station, Vicksburg, Miss.

Abstract

This investigation examines effects of anisotropic versus isotropic consolidation in consolidated-undrained triaxial compression tests performed on specimens of two clays consolidated from a slurry in large-diameter consolidometers. Shear strength and corresponding deformation characteristics were developed in both normally consolidated and overconsolidated ranges. Test results indicate that volume changes during consolidation are not a unique function of the major principal consolidation stress but instead are related to the mean effective consolidation stress and the deviator stress during consolidation. Consequently, for a given major principal consolidation stress, the undrained strength of anisotropically consolidated specimens is lower than that of isotropically consolidated specimens.

Keywords:
soil tests, triaxial tests, pore pressures, shear strength, anisotropic consolidation, cohesive soils

Paper ID: GTJ10868J
DOI: 10.1520/GTJ10868J
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