Abstract:It is very important for marine soft ground projects how to describe the creep behavior of marine soft soil. The marine soft soil is of nonlinear creep characteristics on basis of triaxial creep tests of the three kinds of soft soils from Zhuhai,Shanghai and Yingkou in China. A hyperbola-typed stress-strain relation is stated to suitably describe the constitutive character of marine soft soils. The hyperbola-typed function is proposed for the stress-strain relation in Singh-Mitchell’s creep model and a new stress-strain-time relation is suggested in this paper. There are only three parameters in the proposed creep model,and all the parameters are easy to be determined.