Abstract
AbstractAn experimental program consisting of triaxial compression tests and torsion shear tests was designed and carried out to study the variation of shear strength in cross-anisotropic deposits of fine Nevada sand under two- and three-dimensional (3D) conditions using triaxial compression and a recently developed torsion shear apparatus. Triaxial compression tests were performed on vertical and horizontal specimens with cross-anisotropic fabric to obtain the shear strength and its variation with mean normal stress and with testing direction. The results formed the basis for characterizing the variation of curvature in meridian planes with mean normal stress. Furthermore, 44 drained torsion shear tests were performed at constant mean confining stress σm; constant intermediate principal stress ratios, as indicated by b=(σ2−σ3)/(σ1−σ3); and principal stress directions α. The experiments were performed on large hollow cylinder specimens deposited by dry pluviation and tested in an automated torsion shear a...
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