Creep Characteristic Test and Creep Model of Frozen Soil

In order to research the creep deformation characteristics of frozen soil and effect various influencing factors on creep, indoor uniaxial tests were carried out specimens at temperatures −5, −4, −3 −2 °C under loads 0.25, 0.5, 0.75 σt, respectively. The different load conditions are analyzed unconfined conditions. results show that test conditions, when is low, there no accelerated stage in curve, which belongs decaying type creep; curve enters turns non-attenuated; temperature most important external factor affecting permafrost proportion ice key internal for negatively correlated with sensitivity rate increases decrease ice; damage variable D introduced modify constitutive equation soil, process well described by modified soil.