横向滑坡作用下埋地管道力学响应分析
|
摘要
在Winkler假设的基础上,基于滑坡推力横向分布模型建立了埋地管道在横向滑坡作用下管-土相互作用的力学模型,利用滑坡体内与滑坡体外管道的变形协调性,通过求解埋地管道的弯曲微分方程,得到了埋地管道的挠度、转角、弯矩和剪力的解析解。通过算例,编程计算得到了埋地管道内力和变形的分布曲线,由分布曲线可以看出滑坡边界和滑坡体中间位置是埋地管道最容易发生破坏的位置。选取主滑断面处剩余下滑力P0、管道径厚比D/t以及滑坡宽度L三个影响因素,利用控制变量法分析了各因素对埋地管道受力和变形的影响。结果表明:主滑断面处剩余下滑力和滑坡宽度的增大会使埋地管道的挠度、弯矩和剪力增大,因此在潜在滑坡区应尽量使用小管径、厚管壁的管道,并加强监测,以降低滑坡对管道运营造成的危害。
This paper establishes a mechanical model of pipe-soil interaction in buried pipeline under the action of transverse landslide based on the Winkler hypothesis and the lateral distribution model of landslide thrust.By using the deformation compatibility of the landslide body and the pipeline outside the landslide,the paper obtains the analytical solution of the deflection,rotation angle,bending moment and shear force of the buried pipeline by solving the bending differential equation of the buried pipeline.Then,the paper obtains the distribution curves of pipeline internal force and deformation by programming through an example,which shows that the landslide boundary and the middle position of landslide body are the most vulnerable sites for pipeline failure.Finally,by adopting control variable method,the paper analyzes the influence of the three selected influencing factors on the internal force and deformation of the buried pipeline,including residual slip force P0,pipeline diameter-thickness ratio D/t and landslide width L at the main slide section.The results show that the deflection,bending moment and shear force of buried pipeline increases with the increase of residual sliding force and landslide width at the main sliding section,therefore the pipeline with small diameter and thick pipeline wall should be used as far as possible in the potential landslide area,and the monitoring should be strengthened to reduce the losses caused by landslide to pipeline operation.
This paper establishes a mechanical model of pipe-soil interaction in buried pipeline under the action of transverse landslide based on the Winkler hypothesis and the lateral distribution model of landslide thrust.By using the deformation compatibility of the landslide body and the pipeline outside the landslide,the paper obtains the analytical solution of the deflection,rotation angle,bending moment and shear force of the buried pipeline by solving the bending differential equation of the buried pipeline.Then,the paper obtains the distribution curves of pipeline internal force and deformation by programming through an example,which shows that the landslide boundary and the middle position of landslide body are the most vulnerable sites for pipeline failure.Finally,by adopting control variable method,the paper analyzes the influence of the three selected influencing factors on the internal force and deformation of the buried pipeline,including residual slip force P0,pipeline diameter-thickness ratio D/t and landslide width L at the main slide section.The results show that the deflection,bending moment and shear force of buried pipeline increases with the increase of residual sliding force and landslide width at the main sliding section,therefore the pipeline with small diameter and thick pipeline wall should be used as far as possible in the potential landslide area,and the monitoring should be strengthened to reduce the losses caused by landslide to pipeline operation.
引文
[1]巴拉达夫金.干线管道建设[M].莫斯科:地下矿产出版社,1977.
[2]Brusehi R,Spinazze M,Tomassini D,et al.Failure modes for pipelines areas in landslide areas[M]//Proceedings of the 14th International Conference on Offshore Mechanics and Arctic Engineering.San Donato Milanese,Italy:ASME,1995:608.
[3]Rajani B B,Robertson P K,Morgenstern N R.Simplified design methods for pipelines subjected to transverse and longitudinal soil movements[J].Canadian Geotechnical Journal,1995,32(2):309-323.
[4]Chan P.Soil-pipeline Interaction in Slopes[D].Alberta,Canada:University of Calgary,1999.
[5]Challamel N,de Buhan P.Mixed modeling applied to soil-pipe interaction[J].Computers and Geotechnical,2003,30(3):205-216.
[6]邓道明,周星海,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):18-21.
[7]梁政.滑坡地区管线应力和位移的分析[J].天然气工业,1991,11(3):55-59.
[8]吴锐,梅永贵,邓清禄,等.滑坡作用下输气管道受力分析[J].建筑科学与工程学报,2014(3):105-111.
[9]王磊,邓清禄.滑坡作用对输气管道危害的静力学分析[J].工程地质学报,2010(18):340-345.
[10]张东臣.滑坡条件下埋地管道受力分析[J].石油规划设计,2001,12(6):1-3.
[11]谢强,王雄,张建华,等.不同滑坡形式下埋地管的纵向受力分析[J].地下空间与工程学报,2012(3):505-510.
[12]郝建斌,刘建平,荆宏远,等.横穿状态下滑坡对管道推力的计算[J].石油学报,2012(6):1093-1097.
[13]黄坤,卢泓方,吴世娟,等.穿越滑坡体埋地输气管道应力分析[J].应用力学学报,2015(4):689-693.
[14]唐正浩,邓清禄,万飞,等.滑坡作用下埋地管道的受力分析与防护对策[J].人民长江,2014(3):36-39.
[15]周晓莹,郭永华,吕晓华,等.地质滑坡条件下不同因素对油气管道危险性影响分析[J].工业安全与环保,2012,38(5):42-44.
[16]陈利琼,宋利强,吴世娟,等.基于有限元方法的滑坡地段输气管道应力分析[J].天然气工业,2017(2):84-91.
[17]Yatabe H,Fukuda N,Masuda T,et al.Analytical study of appropriate design for high-grade induction bend pipes subjected to large ground deformation[J].Journal of Offshore Mechanics and Arctic Engineering,2004,126(4):376-383.
[18]Evans A J.Three-Dimensional Finite Element Analysis of Longitudinal Support in Buried Pipes[D].Logan:Utah State University,2004.
[19]王沪毅.输气管线在地质灾害中的力学行为研究[D].西安:西北工业大学,2003.
[20]万娜.滑坡的三维稳定分析方法研究[D].武汉:武汉大学,2005.
[21]张常亮,李同录,李萍,等.边坡三维极限平衡法的通用形式[J].工程地质学报,2008,16(1):70-75.
[22]张常亮,李同录,李萍.三维滑坡推力计算方法探讨[J].工程地质学报,2011,19(2):162-167.
[23]龙驭球.弹性地基梁的计算[M].北京:高等教育出版社,1989.
[2]Brusehi R,Spinazze M,Tomassini D,et al.Failure modes for pipelines areas in landslide areas[M]//Proceedings of the 14th International Conference on Offshore Mechanics and Arctic Engineering.San Donato Milanese,Italy:ASME,1995:608.
[3]Rajani B B,Robertson P K,Morgenstern N R.Simplified design methods for pipelines subjected to transverse and longitudinal soil movements[J].Canadian Geotechnical Journal,1995,32(2):309-323.
[4]Chan P.Soil-pipeline Interaction in Slopes[D].Alberta,Canada:University of Calgary,1999.
[5]Challamel N,de Buhan P.Mixed modeling applied to soil-pipe interaction[J].Computers and Geotechnical,2003,30(3):205-216.
[6]邓道明,周星海,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):18-21.
[7]梁政.滑坡地区管线应力和位移的分析[J].天然气工业,1991,11(3):55-59.
[8]吴锐,梅永贵,邓清禄,等.滑坡作用下输气管道受力分析[J].建筑科学与工程学报,2014(3):105-111.
[9]王磊,邓清禄.滑坡作用对输气管道危害的静力学分析[J].工程地质学报,2010(18):340-345.
[10]张东臣.滑坡条件下埋地管道受力分析[J].石油规划设计,2001,12(6):1-3.
[11]谢强,王雄,张建华,等.不同滑坡形式下埋地管的纵向受力分析[J].地下空间与工程学报,2012(3):505-510.
[12]郝建斌,刘建平,荆宏远,等.横穿状态下滑坡对管道推力的计算[J].石油学报,2012(6):1093-1097.
[13]黄坤,卢泓方,吴世娟,等.穿越滑坡体埋地输气管道应力分析[J].应用力学学报,2015(4):689-693.
[14]唐正浩,邓清禄,万飞,等.滑坡作用下埋地管道的受力分析与防护对策[J].人民长江,2014(3):36-39.
[15]周晓莹,郭永华,吕晓华,等.地质滑坡条件下不同因素对油气管道危险性影响分析[J].工业安全与环保,2012,38(5):42-44.
[16]陈利琼,宋利强,吴世娟,等.基于有限元方法的滑坡地段输气管道应力分析[J].天然气工业,2017(2):84-91.
[17]Yatabe H,Fukuda N,Masuda T,et al.Analytical study of appropriate design for high-grade induction bend pipes subjected to large ground deformation[J].Journal of Offshore Mechanics and Arctic Engineering,2004,126(4):376-383.
[18]Evans A J.Three-Dimensional Finite Element Analysis of Longitudinal Support in Buried Pipes[D].Logan:Utah State University,2004.
[19]王沪毅.输气管线在地质灾害中的力学行为研究[D].西安:西北工业大学,2003.
[20]万娜.滑坡的三维稳定分析方法研究[D].武汉:武汉大学,2005.
[21]张常亮,李同录,李萍,等.边坡三维极限平衡法的通用形式[J].工程地质学报,2008,16(1):70-75.
[22]张常亮,李同录,李萍.三维滑坡推力计算方法探讨[J].工程地质学报,2011,19(2):162-167.
[23]龙驭球.弹性地基梁的计算[M].北京:高等教育出版社,1989.