关键词: 埋地管道 , 土壤温度场 , 管道埋深 , 保温层

Abstract: In the process of hot oil pipeline transport, the buried depth of the soil temperature field has a great influence , and the additional insulation layer around the pipe also influenced thermal characteristics of pipeline own. The relationship between the hot oil pipeline with additional thermal insulation layer and the soil temperature field around it was researched under the conditions of different temperature and the different buried depth. The deeper the hot oil pipeline is buried, the less influence the hot oil pipeline is caused by the temperature of the earth. The results show that in summer the deeper the pipeline is buried, the lower is the soil temperature before transport; the temperature of the exterior is cooler for the pipeline buried deeply than the one buried shallowly after stably transporting oil. And in winter, the deeper the pipeline is buried, the higher is the soil temperature before transport; the temperature of the exterior is higher for the pipeline buried deeply than the one buried shallowly after stably transporting oil. Therefore the pipe insulation layer should chose economic thickness to optimize the temperature of the oil pipe, reduce the energy consumption and improve the economic efficiency. 

Key words: Buried pipeline,    ,  Soil temperature field,     ,  Pipeline buried depth,    ,  Insulation layer