Abstract: Studies on rheological properties of silty clay buried in different depth under different consolidation method and different loading method by setting the principal stress axes in the horizontal and vertical direction were carried out subject to ③2 layer silty clay and ⑥2 layer silty clay in WUXI district, and the rheological equation of generalized Kelvin model and Burgers model under triaxial stress state was derived. The test results fit very well with Burgers model. The test shows that the rheological deformation rate of silty clay buried in the same depth increases with the increase of deviatoric stress, but when the deviatoric stress increases to a certain value, the rheological time is very short and does not maintain the phase of rheological deformation. The rate of rheological deformation and rheological threshold are bigger than that of depth smaller, and the time of rheological deformation to stability is shorter for the same type of soil. By the influence of soil anisotropy, the rheological model parameters vary with the different loading modes, but the model parameters increase with increasing confining pressure.

Key words: silty clay, rheological properties, consolidation method, loading method, Burgers model