Abstract:By taking the Q3 loess of Yangling district in Shaanxi province as the research object,a direct shear creep test is conducted to investigate the characteristics of creep behavior of intact loess,disturbed loess and saturated loess. The experimental results indicate that the intact loess,the disturbed loess and saturated loess all have creep characteristics;under the same experimental conditions,the creep strain rate of saturated loess is the fastest and the creep strain is the biggest among the three kinds of loess samples. The creep characteristics of disturbed loess is less obvious than that of saturated loess;and it is least obvious in intact loess. According to the characteristics of creep curves,a new logarithm model is suggested;and based on the typical creep behavior of loess,the fraction-linearity creep model is used to simulate the shear creep characteristics of Yangling Q3 loess according to the fitting results,the parameters of model are obtained;the model better simulates the creep characteristics of Q3 loess in Yangling district by model test. Besides,based on the experimental data,the relation between shear modulus and normal stress and time is fitted,and a new method to confirm the shear elastic module is supplied.