ABSTRACT
As subgrade with saturated/unsaturated soil in seasonal frozen region, the frost heave disease is more concerned recently. In order to further understand the distribution of the temperature field, moisture field and stress field, and the development of frost heave deformation, first a multi-physics coupling control equation was established, based on energy conservation law, mass conservation law and Darcy’s law. Then based on VG model and the relationship between saturation and hydraulic head, a numerical model which is combined with the apparent heat capacity method was established. Finally the model was verified by compare the results from lab test. This model was used to predict the development of the frost heave deformation and evolution law of each parameter for seasonal frozen soil. And it can provide a theoretical basis for anti-freezing design and evaluation of frost disease.
