Journal
GEOTECHNIQUE
Volume 51, Issue 1, Pages 69-83Publisher
THOMAS TELFORD SERVICES LTD
DOI: 10.1680/geot.2001.51.1.69
Keywords
anisotropy; embankments; laboratory tests
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It is well known that K-0-consolidated natural sediments have anisotropic strength, yielding and stiffness characteristics, particularly at low overconsolidation ratios. For example, the undrained triaxial compression shear strengths developed after K-0-consolidation far exceed those available in extension. This paper describes recent hollow cylinder apparatus research into other types of stress-induced anisotropy, reporting experiments on dense silt samples that involved rotation of the principal stress axes during consolidation. The results show strikingly different anisotropies from those developed by K-0-consolidated samples. The effective stress paths chosen for the laboratory studies were guided by the conditions expected under multi-stage embankments built on soft ground, but the results have considerable significance in other practical geotechnical problems.
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