Numerical investigation of thermal parameter characteristics of the airfield runway adherent layer in permafrost region of Northeast China

Abstract

The thermal parameters of adherent layer are of great significance to the distribution characteristics of temperature field and foundation stability control of runway in permafrost region. This paper investigated the effects of annual range 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 (Finite Element Model) roadbed temperature field and experimental data. The results indicate: A and average 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 proposed by multiple regression. The temperature fields of the three types of pavements obtained by 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 region of adherent layer theory and provide a reference for runway construction in the permafrost region of Northeast China.

Keywords

• Airport engineering
• Permafrost
• Parameters of adherent layer
• Temperature field
• Heat transfer
• Boundary conditions