跨断层埋地连续管道最佳管线-断层交角研究  

Research on the Optimal Crossing Angle of Buried Continuous Pipeline Crossing Fault

作　　者：梅伟 沙斌 周云 顾世祥 霍玉国 杜文琪 MEI Wei;SHA Bin;ZHOU Yun;GU Shi-xiang;HUO Yu-guo;DU Wen-qi(Yunnan Institute of Water and Hydropower Engineering Investigation,Design and Research,Kunming 650021,China;Zhaotong Institute of Water and Hydropower Engineering Investigation,Design and Research,Zhaotong 657099,Yunnan Province,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Institute of Engineering Risk and Disaster Prevention,Wuhan University,Wuhan 430072,China)

机构地区：[1]云南省水利水电勘测设计研究院,昆明650021 [2]云南省昭通市水利水电勘测设计研究院,云南昭通657099 [3]武汉大学水资源与水电工程科学国家重点实验室,工程风险与防灾研究所,武汉430072

出　　处：《中国农村水利水电》2022年第7期146-150,157,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51909193,52078393)。

摘　　要：为探究大管径埋地连续管道在断层错动下的最佳管线与断层交角,以Q235C连续钢管为例,采用ABAQUS有限元分析软件对跨断层大管径埋地连续管道进行了数值模拟,基于管道应变失效准则分析了管线与断层交角对断层作用下埋地管道轴向最大应变及失效区域长度的影响作用,探究了不同断层类型及不同管道埋深下埋地连续管道的最佳管线与断层交角,结果表明:正断层作用下,管道主要受拉伸作用,交角对管道轴向最大拉应变影响较小;逆断层作用下,管道主要表现为受压,交角对管道轴向最大压应变影响较大;走滑断层作用下,管道失效模式与交角相关,交角小于90°时管道容易受拉失效,交角大于90°时管道容易受压失效,且当交角较大时,管道的轴向最大压应变远高于轴向容许压缩应变,管道穿越正、逆断层时推荐交角为75°~105°,穿越走滑断层时推荐交角为75°~90°。In this paper,the finite element model(FEM)of large-diameter buried Q235C continuous pipeline crossing fault is constructed by the finite element software ABAQUS.The optimal crossing angle under normal fault,reverse fault and strike-slip fault is investigated based on the strain failure criteria.What′s more,the influence of the crossing angle on the maximum axial strain and the failure length of the buried pipeline is also studied.The results indicate that normal fault displacement will cause large axial tensile strain in the pipeline and the crossing angle has negligible effect on the maximum axial tensile strain of the pipeline,while pipeline passing through reverse fault is mainly subjected to compression and the crossing angle has a significant influence on the maximum axial compressive strain of the pipeline.As for the pipeline crossing strike-slip fault,pipelines are prone to failure due to tension when the crossing angle is less than 90 degrees and pipelines are subjected to comparatively larger compressive stress when the crossing angle is greater than 90 degrees.The influences of crossing angle on the maximum axial strain and the failure length of the buried pipeline under different buried depths are similar.The crossing angle between the pipeline and the fault is recommended to be 75 degrees to 105 degrees under the normal and reverse faults and 75 degrees to 90 degrees under the strike-slip fault.

关 键 词：断层错动 埋地管道 数值模拟 管线交角 

分 类 号：TV672.2[水利工程—水利水电工程] P315.9[天文地球—地震学]