Experiment Research on Subgrade Frost Heaving of Expressway in Seasonally Frozen Soil Region

Frost heaving is one of the main forms of frost damage on the subgrade engineering in the seasonally frozen soil region. The strong frost heaving in winter means that the seirous thawing and settlement and frost boiling may arise in spring. On the basis of the data of subgrade frost heaving observation of Chang Yu Expressway during the year 2000 to 2002, the characteristics of deformation and damage of pavements by frost heaving are described, the factors which influence the frost heaving analyzed and the distributment of the frost heaving amount along frozen depth clarified.