The calculated results show that the model considering both elastoplastic and anisotropic characteristics in determining soil stress strain relations agrees quite closely with the actual state.

In the test, after anisotropic consolidation, keeping the deviator stress, pore water is injected using pore water control apparatus under a constant volumetric strain controlled condition.

A valid method to make the anisotropic deformation behavior of load bearing unit clear is to research principal stress and principal strain relationship, and true triaxial test is a necessary means.