Abstract: Based on the research of the practical application of two pipelines laid in one ditch in projects, according to actual projects, appropriate technical parameters were chosen and the method of numerical simulations was adopted to analyze the feature and discipline of thermal distribution of hot oil pipeline and cold oil pipeline laid in one ditch. On the basis of it, the thermal stress impact distribution along the two pipelines was respectively studied, and the variation regularity of thermal stress impact along two pipelines was obtained. Then the increase of the maximum thermal stress impact of the two pipelines laid in one ditch compared with the maximum one of the pipelines laid separately was obtained, which provided references in application of engineering design, construction, maintenance and other periods.

Key words: Laying technology of two pipelines in one ditch, Hot oil pipeline, Thermal stress impact, Numerical simulation, Soil temperature field

摘要： 在调研同沟敷设技术在我国工程实际应用的基础上,根据工程实际选取合理的工艺计算参数,采用
数值模拟计算方法,研究了热油管道和冷油管道同沟敷设时管道沿线热力分布特征和分布规律。在此基础上得到
了两管道沿线热应力的变化规律,进而得到两管道相对于单管敷设时沿线最大热应力的增加值,为同沟敷设技术在
工程设计、施工、维修等阶段的应用提供了参考。

关键词: 同沟敷设, 暋热油管道, 暋管道热应力, 暋数值模拟, 暋土壤温度场