A Study On The Deformation Properties Of Subgrade In Perennially Frozen Soil Zone

Through the survey on the subgrade in perennially frozen soil zone of QingZang Highway, and the technical survey on the distress of subgrade, the composition of deformation and its main affection factor of subgrade are analyzed in this paper. On the basis of the thaw settlement test and the creep test, the mechanical properties of subgrade soil in penennially frozen soil zone are studied. Meanwhile, through the heavy dynamic feeler inspection test, the bearing capacity of foundation in perennially frozen soil zone are also studied. At last, this paper discusses the calculation method of deformation of subgrade in perennially frozen soil zone, and analyzes the deformation and temperature distribution of subgrade through the field observation.