Numerical Investigation of Thermal Parameter Characteristics of the Airfield Runway Adherent Layer in Northeast China Permafrost Region

The thermal parameters of the adherent layer are of great significance to the temperature field distribution and stability of the runway foundation in permafrost areas. This paper investigated the effects of annual difference of temperature (A), annual average temperature (TA), and other factors on the adherent layer thickness (H), temperature amplitude (A0), and annual average ground temperature (T0), and further analyzed the thermal parameters of the adherent layer by using the FEM roadbed temperature field and experimental data. The results indicate: A and mean monthly total solar radiation (Q) have the most serious on H. A numerical method for determining the parameters of the adherent layer based on various conditions such as A and TA was established by multiple regression. The temperature fields of the three types of roadbeds obtained by using FEM and the experimental data were compared with the numerical calculation results for verification, and the conclusions were in close agreement, illustrating that the proposed method for calculating the parameters of the adherent layer is reasonable and effective. The research results extend the application area of adherent layer theory and provide a reference for the study of airport runway construction in the permafrost region of northeast China