Abstract: In view of the typical undisturbed silty clay in Wuxi, model tests on different stress paths are conducted. The result of the tests shows that, for silty clay in Wuxi, the stressstrain curve of side unloading can be denoted by hyperbola, and different stress paths have significant impact on deformation and strength of soil. The comparison study of numerical analysis and test result reveals that HSS model with small strain is superior to simulate the influence of different stress paths on initial modulus.

Key words: stress path, triaxial test, initial modulus, constitutive model