Stress path triaxial tests on K0-consolidated saturated soft clay

Five types of stress path triaxial tests were conducted on K0-consolidated Wenzhou saturated soft clay under undrained conditions by GDS triaxial apparatus. The stress-strain relationship, pore water pressure evolution and effective stress path under different stress paths were discussed. Using Skempton theory, a unified formula between pore pressure and axial strain was established through modifying the hyperbolic relationship under constant confining pressure. The results show that the stress-strain relationship and pore water pressure evolution of K0 consolidated soft clay are very different under different stress paths. Because the variation of confining pressure is offset by the generation of pore water pressure, the effective stress paths under different stress paths almost coincide, which validates the uniqueness of relationship of p-q-e. ©, 2015, Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology). All right reserved.