Research on frost heave susceptibility and classification of coarse grained soil of highway subgrade in seasonally frozen ground region

According to the test results of closed simulated frost heave susceptibility experiments with five Rinds of different coarse grained soils and thirteen Rinds of fine grained content soils,the influence of different water contents,degree of saturations and degree of compaction on frost heaving susceptibility was discussed,and the η-w curves and the frost heave law were analyzed.Moreover,linearity for coarse grained soil regression equations of η-w relation and the boundary water content corresponding to different frost heave grades was summerized.