Triaxial Compression Deformation of Unsaturated Sericite Schist Residual Soil

To study the triaxial compression characteristics of unsaturated sericite schist residual soil, the compression tests of controlling matric suction and net mean stress were carried out by using unsaturated triaxial creep apparatus. The results show that: when the matric suction is the same, the compression deformation increases with the increase of net mean stress. In a certain range, with the increase of matrix suction, the yield stress of sericite schist residual soil also increases, and when the dry density is high, the yield stress is high. When the net mean stress is the same, the deformation decreases with the increase of matrix suction. Comparing the compression tests under the two kinds of stress change, it can be found that the main reason for deformation is the application of load after reaching the yield suction.