期刊
CANADIAN GEOTECHNICAL JOURNAL
卷 -, 期 -, 页码 -出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cgj-2022-0246
关键词
silt-clay soil; stress-strain; shear strength; silt content; true triaxial test
The effect of silt content on the mechanical behavior of silt-clay transition soils under 3D stress conditions is investigated. With increasing amount of nonplastic silt, the cohesive soils exhibit less contractive tendencies, stiffer stress-strain response, and larger shear strength.
The effect of silt content on the mechanical behavior of silt-clay transition soils under 3D stress conditions is presented. Undrained true triaxial tests with constant b values were performed on normally consolidated specimens of silt-clay transition soils created from the same base clay and nonplastic silt, however, with systematically varying gradations. With increasing amount of nonplastic silt, the cohesive soils exhibit less contractive tendencies, stiffer stress-strain response, and larger shear strength. The magnitude of intermediate principal stress, as indicated by the b value, also strongly influences the stress-strain relations, pore pressure behavior, and both total and effective failure surfaces. Although the transition soils exhibit overall clay-like behavior, more pronounced frictional characteristics, as indicated by the shapes of the failure and plastic potential surfaces, were exhibited with increasing silt content.
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