Numerical Simulation Of Soil Temperature Field Surrounding Underground Heat Pipe In Permafrost Region

The prediction of the change of soil temperature field surrounding the underground pipe at constant temperature in permafrost region is important to the pipe and the ground structures atop. Numerical simulation is an effective method to predict the change of soil temperature field including the influence of heat pipe to the surrounding soil temperature field. Applied fluid mechanics, heat transfer theory and permafrost engineering theory, a mathematical model for underground heat pipe-soil temperature field has been established and analyzed by using the simulation software Geo Studio TEMP/W, the variation of the soil temperature field in permafrost region has been simulated in the condition of insulation layer or not, then the tendency of the freeze-thaw curves and the temperature range surrounding underground heat pipe in operation has also been presented compared. The results are applied in the fields of structure optimization and safe operation of underground pipe, etc.