摘要
当埋地天然气管道运营时,管道周围冻土的热平衡会被破坏。为了研究冻土区新建管道或停输再启动对周围土壤的影响,建立输气管道与冻土相互作用的热-水-力耦合计算模型,利用数值分析方法求解。对不同输运温度、埋深工况下的管道热影响和管道路堤的传热过程进行模拟。研究结果表明:当管温提升时,管道附近1.5 m内有较明显升温,冻土原有稳定性受到较大影响,当管道埋深增加时,横向影响距离变远;管道附近浅层土壤温度、相对饱和度随地表温度周期性变化并有一定滞后;埋深对冻土的自然冻胀的影响大于输送温度对其影响;缓解热影响的管道路堤可以改善有管线的冻土区。
When the natural gas pipeline is operated,the thermal balance of frozen soil around the pipeline is destroyed.In order to study the impact of new pipelines or stop and restart on the surrounding soil in permafrost areas,establish the heat-water-mechanical coupling calculation model of the interaction between the gas pipeline and the frozen soil,and use the numerical analysis method to solve it.Simulate the thermal effects of pipelines under different transport temperatures and burial depths and the heat transfer process of the pipeline embankment.The research results show that when the pipe temperature increases,the temperature increases significantly within 1.5 m near the pipe,and the original stability of the permafrost is greatly affected.When the buried depth of the pipe increases,the lateral influence distance becomes farther.The shallow soil temperature and relative saturation near the pipeline change periodically with the surface temperature and have a certain lag;the impact of burial depth on the natural frost heave of frozen soil is greater than the impact of transport temperature;Pipeline embankments to mitigate heat impacts can improve permafrost areas with pipelines.
作者
王翔鹏
潘振
苏文涛
刘利
陈星元
黄绍畅
商丽凤
WANG Xiang-peng;PAN Zhen;SU Wen-tao;LIU Li;CHEN Xing-yuan;HUANG Shao-chang;SHANG Li-feng(College of Petroleum and Natural Gas Engineering,Liaoning Petrochemical University,Fushun 113001,China;Fushun Special Equipment Supervision and Inspection Institute,Fushun 113000,China)
出处
《节能技术》
CAS
2022年第5期409-415,共7页
Energy Conservation Technology
基金
辽宁省博士科研启动基金计划项目(2019-BS-159)
辽宁省教育厅重点科研项目(L2020002)
辽宁省教育厅科学研究经费项目(LJKZ0381)。
关键词
天然气管道
冻土
热-水-力耦合
数值模拟
管道路堤
natural gas pipeline
frozen soil
thermal-water-mechanical coupling
numerical simulation
pipeline embankment
