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

摘要： 摘 要:  管道埋深对管道周围土壤温度场及管道的热力特性有重要的影响, 埋深不同, 相对应的管道周围土
壤的温度场也不同。对埋深不同的埋地管道周围土壤温度场进行了数值模拟, 并选用水热耦合模型和传热模型进
行了计算。对通过两种模型得到的计算结果进行了分析。结果表明, 埋深对埋地管道周围土壤温度场有一定的影
响, 水分迁移和冰水相变对埋地管道的温度分布也有一定的影响; 埋深不同时, 水分迁移和冰水相变对土壤温度场
的影响也不同, 管道埋深越浅, 通过两种模型计算得到的相同点处的温度相差越大。为了得到更接近于实际的计算
结果, 应该考虑水分迁移和冰水相变, 计算时应考虑水热耦合问题。

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