The Effect of Initial Sampling Moisture Content on Anisotropic Behavior of Remolding Saturated Silt

Abstract

By using the soil static and dynamic universal tri-axial and torsional shear apparatus, the experiment was performed on remolding saturated samples of Shan-Dong Dong-Ying silt which was prepared respectively with 0%, 5%, 10% initial sampling water content. A series of stress-controlled undrained monotonic torsional shearing tests were conducted under the same conditions of initial mean principal stress as 100kPa, initial intermediate principal stress coefficient as 0.5, initial deviator stress ratio as 0.433, but with different initial orientation angle of the principal stress at 0o, 30o, 45o, 60o, 90o. During the test the intermediate principal stress coefficient and mean principal stress were controlled constantly. The anisotropic behavior of the silt were discussed through the effects of initial sampling water content and initial orientation of the principal stress on the incremental stress-strain relations of different orientations, and the strain path. It was shown that the initial sampling water content had a remarkable influence on initial anisotropic behavior. Under the same condition, the higher the initial sampling water content is, the less obviously the anisotropic behavior is. The difference between the strain path and the stress path was obvious.