关键词: 管道埋深; , 土壤温度场; , 冻土; , 水热耦合; , 数值模拟

Abstract: Buried depth of pipeline has important effects on the temperature field and thermal characteristics of soil around the pipe. Corresponding to different buried depth, the temperature field of soil around pipeline was also different. With different buried depth of pipeline, the temperature field of soil around the pipeline was simulated and calculated by using water thermal coupling model and heat transfer model. The analysis of the calculation results of two models showed that the embedded depth had certain influence on the temperature field of soil around the buried pipeline, and so do moisture migration and the water phase transition. Comparing with the temperature difference obtained by the two kinds of models in the same temperature, the results show that with different buried depth, the influence of moisture migration and the water phase change also had different influence on the soil temperature. The shallower the buried depth of pipeline was, the bigger the difference of temperature of the two models in the same place was. In order to get actual calculation results, the moisture migration and the water phase as well as water heat coupling problems in calculating should be considered.

Key words: Buried depth of pipeline, Temperature field of soil, Frozen earth, Waterheat coupling, Numerical simulation