2021 Volume 77 Issue 2 Pages I_85-I_92
Two-dimensional heat transfer analysis can be used to understand the difference in frost penetration depth in the road crossing direction caused by partial snow cover and installation of heat insulating material. However, in order to estimate the frost penetration depth from the limited information that is easily available detailed consideration of the analytical method such as the depth of the model ground and the boundary conditions is required. In this study, based on the results of underground temperature measured in a relatively homogeneous ground, an analytical method that can estimate the maximum frost penetration depth only from the thermal properties of each layer and surface temperature is constructed. By analyzing the paved road where the ground surface temperature was measured according to the constructed method, the frost penetration depth could be estimated accurately. In addition, it was confirmed that it is important to grasp the surface temperature in order to accurately estimate the frost penetration depth, and that the frost penetration depth can be accurately estimated even by using the thermal parameters calculated by Kersten's and Ifukube's equation.
