寒区埋地热油管道周围土壤冻胀融沉数值分析

基于相变瞬态温度场数学力学模型,自行编制有限元程序借助ANSYSY软件对寒区埋地热油管道周围土壤的冻融相变过程进行数值计算,分析了环境温度周期波动情况下热油管道周围土壤温度场、应力场、位移场的变化关系.研究表明:在地表温度的周期性正负波动下,较长时间内管道周围土壤温度场、位移场、应力场变化剧烈,且管道上方土体的融沉速率...

Numerical Analysis for Frost Heave and Thawing Settlement of Soil Around Buried Heated Oil Pipeline in Cold Regions

Based on the mathematical mechanical model of phases change transient temperature field, with the help of ANSYSY software, numerical calculation about frost heave and thawing settlement during phrases change process of soil around buried heated oil pipeline in cold regions was carried out with finite element program developed by myself. The relationship among the temperature field and the stress field and the displacement field of soil around buried heated oil pipeline under the case of ambient temperature periodic fluctuations was analyzed. The results show that under the case of surface temperature periodical positive and negative flections, the temperature field and the displacement field and the stress field of the soil around the pipeline change fiercely in longer time. And the thawing rate of soil above pipeline is slightly larger than around the pipeline. The influence of soil thermal resistance on heat transfer is bigger. The results can provide a theoretical guidance for design of the frozen soil pipeline project.