In order to investigate the uniaxial creep test of artificially frozen clay and its creep constitutive model,labo-ratory tests were conducted on artificially frozen clay,and the test results at different freezing temperatures were compared and analyzed.Based on the analysis results,the conventional model is improved to derive the elastic modulus,viscosity co-efficient and other parameter values,and establish the creep constitutive equations of frozen soil related to time,stress and temperature.The results show that with the decrease of freezing temperature,the higher the compressive strength,the smaller the creep deformation of frozen soil.For the improved constitutive model,by comparing the theoretical value with the actual value,it can be seen that when creep occurs to the final stage,the calculated value of the model is higher than the experimental value,which is relatively safe for the actual project,so the established constitutive model has a certain physical significance and feasibility in the actual engineering.
frozen claycompressive strengthcreepconstitutive equationBurgers model
NETL
NSTL
万方数据
