成品油管道的极限悬空长度研究
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摘要
长输管道沿线地质地貌错综复杂,自然条件恶劣,外界载荷(如地质滑坡、坍塌、疏松土壤沉降、湿陷性黄土、地震、水毁等)导致大跨度悬空,轻则引起管道大变形,大面积悬空、局部变形或应力集中,而导致较大的位移应力、屈曲或蠕变,严重时甚至导致管道断裂破坏,给管道运营带来安全隐患。针对2010年兰成渝输油管道德阳石亭江段洪水导致管线大面积悬空案例,以物理数学方法中的非线性理论为指导,通过有限元仿真建模及试验研究,借助大挠度梁理论、弹性地基理论、管–土互作用双线性模型、Winkler假定等力学理论,考虑管道的几何非线性和土壤的物理非线性,建立了悬空管道的大变形分析模型,分析计算了X52管材的极限悬空长度,为管道完整性管理提供理论基础。
The external load(such as geology landslide,collapse,loose soil deposition,collapsible loess,earthquakes,water damage,etc.)caused by complex geological features and poor natural conditions along long-distance the pipeline will result in a large span of vacancy of the pipeline.Slightly inciting the large deformation of the pipeline,a large area of vacancy,the local deformation or stress concentration,resulting in greater displacement and stress,buckling or creep,or even badly cause pipeline rupture,producing pipeline safety hazards.We establish suspended pipeline model in this paper,calculate maximum suspended length of X52 refined oil pipeline by using the theory of elastic foundation,large deflection beam theory,pipeline soil interaction,Winkler presumption model and considering the geometric nonlinearity and soil physical nonlinearity on the basis of Lan-Cheng-Yu,Deyang,Shijiangting oil pipeline large area suspended for flood water.
The external load(such as geology landslide,collapse,loose soil deposition,collapsible loess,earthquakes,water damage,etc.)caused by complex geological features and poor natural conditions along long-distance the pipeline will result in a large span of vacancy of the pipeline.Slightly inciting the large deformation of the pipeline,a large area of vacancy,the local deformation or stress concentration,resulting in greater displacement and stress,buckling or creep,or even badly cause pipeline rupture,producing pipeline safety hazards.We establish suspended pipeline model in this paper,calculate maximum suspended length of X52 refined oil pipeline by using the theory of elastic foundation,large deflection beam theory,pipeline soil interaction,Winkler presumption model and considering the geometric nonlinearity and soil physical nonlinearity on the basis of Lan-Cheng-Yu,Deyang,Shijiangting oil pipeline large area suspended for flood water.
引文
[1]赵忠刚,姚安林,赵学芬,等.长输管道地质灾害的类型、防控措施和预测方法[J].石油工程建设,2006,32(1):7–12.
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[9]尚尔京,于永南.地层塌陷区段埋地管道变形与应力分析[J].西安石油大学学报:自然科学版,2009,24(4):46–49,57.Shang Erjing,Yu Yongnan.Deformation and stress ana-lysisoftheburiedpipelineinformationcollapseregion[J].Journal of Xi’an Shiyou University:Natural Science Edi-tion,2009,24(4):46–49,57.
[10]张昆.复杂环境下埋地管道受力变形研究[D].成都:西南石油大学,2007.
[11]Yun H D,Kyriakids S.Model for beam-mode bucklingof buried pipelines[J].Journal of Engineering Mechanics,1985,111(2):230–253.
[12]Liang Chuanpeng.Stress analysis methods for un-derground pipelines.Part2 soil-pipe interaction lines[J].Pipeline industy,1978(5):65–74.
[13]尚尔京,于永南.地层塌陷区段埋地管道变形与应力分析[J].西安石油大学学报:自然科学版,2009,24(4):46–49,57.Shang Erjing,Yu Yongnan.Deformation and stress anal-ysisof the buriedpipelineinformationco llapse region[J].Journal of Xi’an Shiyou University:Natural Science Edi-tion,2009,24(4):46–49,57.
[2]帅健.管线力学[M].北京:科学出版社,2010.
[3]邓道明,周海新,申玉平.横向滑坡过程中管道的内力和变形计算[J].油气储运,1998,17(7):18–22.Deng Daoming,Zhou Haixin,Shen Yuping.Calulation ofpipeline inner force and distortion during transverse land-slide body,Oil&Gas Storage and Transportation,1998,17(7):18–22.
[4]张坤勇,王宇,艾英钵.任意荷载下管土相互作用解答[J].岩土工程学报,2010,32(8):1189–1193.Zhang Kunyong,Wang Yu,Ai Yingbo.Analytical solu-tion to interaction between pipelines and soils under arbi-trary loads[J].Chinese Journal of Geotechnical Engineer-ing,2010,32(8):1189–1193.
[5]龚爱民,傅蜀燕,黄海燕.ANSYS软件在分析地下埋管工程中的应用[J].安徽建筑工业学院学报:自然科学版,2004,12(5):51–55.Gong Aimin,Fu Shuyan,Huang Haiyan.The applicationof ANSYS in filled conduit analysis[J].Journal of AnhuiInstituteofArchitecture&Industry,2004,12(5):51–55.
[6]王维,梁政.关于悬垂管道计算模型的研究[J].天然气工业,1997,17(5):63–66.Wang Wei,Lian Zheng.A study on the calculation modelof catenary pipe[J].Natural Gas Industry,1997,17(5):63–66.
[7]梁政.石油工程中的若干力学问题[M].北京:石油工业出版社,1999.
[8]赵林,冯启民.埋地管线有限元建模方法研究[J].地震工程与工程振动,2001,21(2):53–57.ZhaoLin,FengQimin.Researchonmethodsforestablish-ing FEM model of buried pipelines[J].Earthquake Engi-neering and Engineering Vibration,2001,21(2):53–57.
[9]尚尔京,于永南.地层塌陷区段埋地管道变形与应力分析[J].西安石油大学学报:自然科学版,2009,24(4):46–49,57.Shang Erjing,Yu Yongnan.Deformation and stress ana-lysisoftheburiedpipelineinformationcollapseregion[J].Journal of Xi’an Shiyou University:Natural Science Edi-tion,2009,24(4):46–49,57.
[10]张昆.复杂环境下埋地管道受力变形研究[D].成都:西南石油大学,2007.
[11]Yun H D,Kyriakids S.Model for beam-mode bucklingof buried pipelines[J].Journal of Engineering Mechanics,1985,111(2):230–253.
[12]Liang Chuanpeng.Stress analysis methods for un-derground pipelines.Part2 soil-pipe interaction lines[J].Pipeline industy,1978(5):65–74.
[13]尚尔京,于永南.地层塌陷区段埋地管道变形与应力分析[J].西安石油大学学报:自然科学版,2009,24(4):46–49,57.Shang Erjing,Yu Yongnan.Deformation and stress anal-ysisof the buriedpipelineinformationco llapse region[J].Journal of Xi’an Shiyou University:Natural Science Edi-tion,2009,24(4):46–49,57.
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