多年冻土区输油管道-管周冻土热力相互作用研究进展  

Progress in the research on the thermo-mechanical interaction between oil pipeline and permafrost in cold regions

作　　者：王飞 李国玉 马巍 WANG Fei;LI Guoyu;MA Wei(Faculty of Civil Engineering and Mechanics,Jiangsu University,Zhenjiang 212013,Jiangsu,China;State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Jiagedaqi 165000,Heilongjiang,China)

机构地区：[1]江苏大学土木工程与力学学院,江苏镇江212013 [2]中国科学院西北生态环境资源研究院冻土工程国家重点实验室,甘肃兰州730000 [3]中国科学院西北生态环境资源研究院大兴安岭冻土工程与环境观测研究站,黑龙江加格达奇165000

出　　处：《冰川冻土》2022年第1期217-228,共12页Journal of Glaciology and Geocryology

基　　金：中国科学院A类战略性先导科技专项(XDA2003020102);国家自然科学基金项目(42101121;41672310);冻土工程国家重点实验室开放基金项目(SKLFSE202010)资助。

摘　　要：冻土区管道工程建设面临冻土工程特性及相关地质问题的严重挑战,开展管道-冻土相互作用研究对于解决管道稳定性问题具有重要的实际指导意义。综述国内外输油管道-冻土热力相互作用研究进展发现,目前研究集中在特定(定值或周期变化)油温下管周土温度场的定量描述以及差异冻胀/融沉下交界面处管道力学响应规律的解耦分析,缺乏完整时空序列的现场综合观测与管土界面特性及其动态演化研究。对管道防融沉措施进行归纳总结发现,各措施应用效果缺乏管道应力与变形数据的有效支持。应加强管道本身与管道沿线次生冻融灾害监测及相关数据获取,以此为校验开展管土界面特性及演化规律的系统研究,以便构建更为合理的管土接触面单元模型,将其和具有普适性的冻土模型相结合,植入有限元软件提高管土相互作用模型计算可靠性,并建议立足管道变形角度对防融沉措施的工程应用效果予以综合评价。The engineering characteristics of permafrost and its coherent geological problems are the huge chal⁃lenge during the construction of pipelines in permafrost regions.Research on the pipeline-permafrost interaction is important for solving the stability problems of pipeline.In this paper,thermal and mechanical interaction of pipeline with permafrost is reviewed and discussed.It is found that previous researches focus on the quantitative description of temperature fields around the pipeline under a given or cyclic oil temperature,and the decoupling analysis of mechanical response of pipeline under differential deformation induced by frost heave or thaw settle⁃ment of pipeline foundation soil.The comprehensive in-situ monitoring data can barely be found,and systematic research on the interface characteristic between pipeline and permafrost is lack.Meanwhile,the existing antithaw settlement measures are classified and assessed,indicating that the application and evaluation of these miti⁃gative measures is not supported by pipeline deformation data.Finally,the prospect of research on pipeline-per⁃mafrost interaction is presented,including strengthening the monitoring of stress and deformation for buried pipe⁃line and secondary freezing-thawing hazards along the pipeline route,studying the interface property of pipelinepermafrost and its evolution process to establish a more reasonable contact element model,embedding interface model and permafrost model with general applicability to the finite element software to improve the reliability of pipeline-permafrost model,and evaluating performance of mitigative measures from the viewpoint of the defor⁃mation stability of pipeline.

关 键 词：输油管道 冻土 相互作用 融沉 冻胀 

分 类 号：P642.14[天文地球—工程地质学]