Time-Dependent Creep Damage Model of Frozen Soil with Unsteady Fractional Order under Temperature and Stress Coupling

In order to study the creep characteristics of frozen soil under different confining pressures, triaxial tests temperatures are carried out and deformation law pressures freezing is analyzed. this paper, unsteady Abel dashpot constructed by viscosity coefficient. On basis, fractional unsteady. Then, a time-dependent constitutive model for based on established. The can better describe accelerated rock. Through Levenberg–Marquardt algorithm, parameters identified verify correctness model. results show that well overcome shortcoming traditional cannot deformation. At same time, agreement between curve test also much greater than Nishihara curve. This lays foundation later use simulate settlement horizontal displacement subgrade long-term loads provides theoretical basis construction other roadbed projects.