Modified Mesri s Creep Model for Soils in Sliding Zone of Xietan Landslide in the Three Gorges

In orderto provide the basementof a further numerical analysis, the drained triaxial compression creep tests with a constant stress were carried out for soils in the sliding zone of Xietan landslide in the Three Gorges. Based on these tests, a shear stress-strain-time function, namely, Mesri s creep model, in which a hyperbolic linewas adopted for describing the shear stress-strain behaviour and a power function for the strain-time behaviour, was given. A modified Mesri s shear stress-strain-time model was proposed. In this model, the strain-time behavior of the soilswas simulated by subsection. Through contrast of computed curvesbased on the two models and test data, the result shows that the modified Mesri s model has an advantage over the Mesri s model in the simulation capability for creep behaviours of clay.