Pore Pressure Behavior of ‐Consolidated Clays
Publication: Journal of Geotechnical Engineering
Volume 114, Issue 11
Abstract
It is a common belief that negative incremental pore pressures occur during undrained triaxial compression loading of clays with overconsolidation ratios greater than approximately 4. While this behavior is characteristic of isotropically consolidated clays, a review of data from anisotropically consolidated tests on natural clays suggests that incremental pore pressures actually either remain positive or become only slightly negative at very high overconsolidation ratios. This phenomenon may be attributed in part to the location of the yield surface, which extends above the normally consolidated effective stress failure envelope, which is reflected by a Mohr-Coulomb cohesion intercept on the order of 4 ± 2% of the maximum preconsolidation pressure.
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Published In
Journal of Geotechnical Engineering
Volume 114 • Issue 11 • November 1988
Pages: 1340 - 1346
Copyright
Copyright © 1988 ASCE.
History
Published online: Nov 1, 1988
Published in print: Nov 1988
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