Abstract:

Based on the investigation of some concrete pavement frozen damage in situ and laboratory experiments, the frozen damage mechanism and the influence factors are studied. The central region of Jilin Province has been identified as a prone areas of frost heaving, and the intensity of frost swell is related to dry unit weight and to be the maximum when the dry unit weight is about 18 kN/m³. The frost swell will decrease because the greater load of the high filled subgrade is provided. The frost depth expressions based on the index of congelation or the accumulates value of temperature respectively can be selected to determine the depth of freeze as an empirical formula.

Key words: frozen soils, roadbed, freeze swell, index of congelation, accumulates value of temperature, depth of freeze