Analysis of Temperature Field Characteristics in Seasonal Frost Region Airport Pavement Subgrade

To study the variation patterns of the temperature field in seasonal frost region airport subgrades, this research establishes a heat conduction equation with phase change latent heat as an internal heat source. During the freezing and thawing processes in seasonal frost regions, a numerical simulation model of airport subgrades is developed, with thermal characteristic parameters of the soil as research variables. The study focuses on investigating the characteristic changes in the temperature field of seasonal frost region airport subgrades, ultimately obtaining the variation patterns of shallow temperature within the natural subgrade and surface temperature.