Abstract
Using a true triaxial shear test apparatus, a series of static loading tests were performed in undrained conditions on saturated cubical sand specimens. The three principal stresses were programmed to produce radial stress paths with different directions on the octahedral plane in the three-dimensional stress space. The radial stress paths used consisted of 13 stress paths radiating outwards from the center of the octahedral plane with an angle interval of 15 degrees. As it had been observed previously in drained tests, the effects of inherent anisotropy were noted in the deformation and the pore water pressure buildup characteristics. It was observed that the specimen prepared by vertical deposition exhibited stronger resistance to deformation when loaded vertically in the triaxial stress state of compression than when loaded horizontally in the triaxial stress state of extension. The specimens subjected to loads intermediate between triaxial compression and extension exhibited intermediate resistance.
