Research status of frost heaving properties and controlling measures of coarse grained soil

Both field and laboratory tests showed that frost heaving susceptibility of coarse grained soil were related to many factors, such as soil gradation, initial moisture content, temperature and external loads.Apparent frost heaving had been observed in coarse grained soil under certain composition conditions. In an attempt to explain the subgrade frost heaving properties of Harbin-Dalian high-speed railway,based on some documents on frost heaving properties of coarse grained soil,in this paper,first,frost heaving theory of coarse grained soil is disserted and reviewed,then research findings and problems about fines,water,and temperature,which influence frost heaving properties of coarse grained soil seriously,are presented. At last,several issues on frost heaving theory and model are proposed,which should be paid more attention to,in order to evaluate and prevent frost heaving of highway and railway better.