1D creep model for frozen soil taking account of stress history

The stress history is a key factor influencing the mechanical behavior of frozen soil. A one-dimensional creep model for unfrozen soil considering the effect of stress history is modified to describe the creep behavior of frozen soil. Model parameters are obtained from K₀ tests under different temperatures. Through the regression analysis, the relationships between model parameters and temperatures are established. The comparison between the calculated and tested results indicates that the modified creep model has a good agreement with the experimental results under different temperatures. At the same time, with the increase of overloading, this model can describe the sharp change of strain when the overloading is larger than the historical largest applied stress reasonably. So, the modified model can be a useful tool for the stability analysis and design of prosects in cold regions.