Analyses of deformation in frozen clayey soils

Based on the triaxial compression tests, it is found that the volume of specimens in frozen clayey soils contracted at initial stage of loading, but as the load was increased, the volume contracted to a certain value and then expanded with the continuous increase in the load, and the axial strain increased with the increase of deviatoric stress. The quasi-elastic, yielding and viscoplastic part in stress-strain curves just corresponded to the contracted part of volume, the maximum position of contracted part and the expanded part of volume, respectively. According to the deformation curves, this paper has given the stress-strain relation which considered the volume strain of frozen soil.