西气东输二线穿越处管道位移分析及解决方案
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摘要
西气东输三线与西气东输二线管道采用并行敷设方式,在西气东输三线管道施工时,在精伊霍铁路穿越处开挖了西气东输二线管道一侧覆土,西气东输二线管道发生明显的弯曲变形。利用ANSYS软件,模拟计算暴露段管道在内压、温度、土壤压力等综合作用下产生的应力、位移,并对管道进行应力校核。结果表明:施工开挖导致暴露段管道土壤约束不平衡,侧向土压力是导致管道发生位移的主要原因。因而提出了减少位移的解决方案:采用分段开挖、回填暴露段管道另一侧土,释放管道由侧向土压力产生的应力。通过落实该解决方案,消除了管道位移风险,提高了管道安全平稳运行的可靠性。
The Third and the Second West-to-East Gas Pipeline are laid in parallel. During the construction of the Third West-to-East Gas Pipeline, the earth on the one side of the Second West-to-East Gas Pipeline was excavated at the crossing position of the Jinghe-Yining-Huoerguosi railway, and the Second West-to-East Gas Pipeline suffered obvious bending deformation. In this paper, the stress and displacement of the exposed pipeline section under the joint effect of internal pressure, temperature and soil pressure were simulated and calculated by the software ANSYS, and the pipeline stress was checked. It is shown that the excavation leads to imbalanced soil restraint on the exposed pipeline section. The lateral soil pressure is the main cause of the pipeline displacement. Accordingly, the solution for displacement reduction was proposed. That is to release the stress on the pipeline resulted from the lateral soil pressure by conducting stepwise excavation and back filling at the other side of the exposed pipeline section so as to reduce the horizontal displacement of pipelines. And by means of transformation measures, the risk of pipeline displacement is eliminated and the reliability of the pipeline is improved.
The Third and the Second West-to-East Gas Pipeline are laid in parallel. During the construction of the Third West-to-East Gas Pipeline, the earth on the one side of the Second West-to-East Gas Pipeline was excavated at the crossing position of the Jinghe-Yining-Huoerguosi railway, and the Second West-to-East Gas Pipeline suffered obvious bending deformation. In this paper, the stress and displacement of the exposed pipeline section under the joint effect of internal pressure, temperature and soil pressure were simulated and calculated by the software ANSYS, and the pipeline stress was checked. It is shown that the excavation leads to imbalanced soil restraint on the exposed pipeline section. The lateral soil pressure is the main cause of the pipeline displacement. Accordingly, the solution for displacement reduction was proposed. That is to release the stress on the pipeline resulted from the lateral soil pressure by conducting stepwise excavation and back filling at the other side of the exposed pipeline section so as to reduce the horizontal displacement of pipelines. And by means of transformation measures, the risk of pipeline displacement is eliminated and the reliability of the pipeline is improved.
引文
[1]李茂华,石磊彬,钟威,等.内外压热应力影响下西气东输二线长输管道变形的有限元分析[J].天然气工业,2013,33(8):119-124.LI M H,SHI L B,ZHONG W,et al.The finite element analysis and calculation of pipeline stress and strain under the effect of heat stress and internal or external pressure in the West-to-East China Gas PipelineⅡ[J].Natural Gas Industry,2013,33(8):119-124.
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[14]王迪,刘恩斌.天然气站场管道应力分析[J].管道技术与设备,2015(2):9-12.WANG D,LIU E B.Stress analysis of natural gas station pipelines[J].Pipeline Technique and Equipment,2015(2):9-12.
[15]唐菁菁,蔡春梅,张世忱.工艺管道应力分析中对偶然载荷的静态处理[J].化工设备与管道,2014,51(1):83-86.TANG J J,CAI C M,ZHANG S C.Static method for occasional loads used in analysis of stresses in process piping[J].Process Equipment&Piping,2014,51(1):83-86.
[16]周俊明,李晓明.浅谈管道静力学分析模拟失真现象[J].化工设备与管道,2011,48(5):44-47.ZHOU J M,LI X M.Brief discussion of simulation of distortion phenomenon by using statics analysis[J].Process Equipment&Piping,2011,48(5):44-47.
[17]张振永,郭彬,管军,等.超大输量天然气管道工艺方案筛选[J].油气储运,2013,32(8):857-862.ZHANG Z Y,GUO B,GUAN J,et al.Selection of transmission program for super-throughput gas pipeline[J].Oil&Gas Storage and Transportation,2013,32(8):857-862.
[18]倪姗姗,黄冬,胡开胜,等.西气东输二线站场收发球筒位移原因及解决方案[J].油气储运,2015,34(11):1250-1254.NI S S,HUANG D,HU K S,et al.Causes and solution for displacements of pig launchers and receivers in stations along2nd West-to-East Gas Pipeline[J].Oil&Gas Atorage and Transportation,2015,34(11):1250-1254.
[19]傅文奎,李霖,王尚林,等.天然气管道作业风险管理与预控措施[J].油气储运,2011,30(7):534-535.FU W K,LI L,WANG S L,et al.Construction risk management and precontrol measures of natural gas pipeline[J].Oil&Gas Storage and Transportation,2011,30(7):534-535.
[20]张平,李可夫,邵勇,等.油气管道并行敷设风险分析[J].油气储运,2013,32(9):1027-1033.ZHANG P,LI K F,SHAO Y,et al.Risk analysis for installation of parallel oil&gas pipelines[J].Oil&Gas Storage and Transportation,2013,32(9):1027-1033.
[21]郭小强,黄丽,张黎明,等.油气长输管道并行敷设间距设计[J].油气储运,2009,28(9):46-48.GUO X Q,HUANG L,ZHANG L M,et al.Design of parallel laying spacing of oil and gas long-distance pipelines[J].Oil&Gas Storage and Transportation,2009,28(9):46-48.
[22]许砚新,马学海,庞宝华,等.天然气管道与原油管道并行敷设的安全间距[J].油气储运,2011,30(11):816-818.XU Y X,MA X H,PANG B H,et al.Determination of safety distance for parallelly laid natural gas/oil pipelines[J].Oil&Gas Storage and Transportation,2011,30(11):816-818.
[23]向波.并行管道安全间距及保护措施研究[J].天然气与石油,2009,27(3):1-3.XIANG B.Research on safety distance and protection measures of parallel pipeline[J].Natural Gas and Oil,2009,27(3):1-3.
[2]邓道明,李育光.埋地柔性管道的应力和变形分析[J].油气储运,1998,17(6):11-17.DENG D M,LI Y G.Analysis on stress and distortion of buried flexible pipeline[J].Oil&Gas and Transportation,1998,17(6):11-17.
[3]蔡克,杨锋平,罗金恒.天然气管道的屈曲变形模拟[J].油气储运,2013,32(4):402-405.减小至523 mm以下,则管道一次应力、二次应力满足规范要求(表7)。CAI K,YANG F P,LUO J H,et al.Simulation on buckling deformation of natural gas pipeline[J].Oil&Gas Storage and Transportation,2013,32(4):402-405.
[4]刘悦,李山,冯庆善,等.某成品油管道悬管段安全状态评价[J].油气储运,2011,30(5):390-392.LIU Y,LI S,FENG Q S,et al.Safety conditions evaluation on suspended pipe section in a products pipeline[J].Oil&Gas Storage and Transportation,2011,30(5):390-392.
[5]刘广东,张富美,艾华宁,等.ANYSY在核级管道应力分析中的应用[J].核科学与工程,2014,34(1):116-124.LIU G D,ZHANG F M,AI H N,et al.Application of ANSYSsoftware in nuclear piping stress analysis[J].Nuclear Science and Engineering,2014,34(1):116-124.
[6]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.ZHAO L,FENG Q M.Research on methods for establishing FEM model of buried pipelines[J].Earthquake Engineering and Engineering Vibration,2001,21(2):53-57.
[7]郝婷玥,陈贵清.管道与土的相互作用[J].水利科技与经济,2007,13(4):237-239.HAO T Y,CHEN G Q.Interaction with the soil and pipe[J].Water Conservancy Science and Technology and Economy,2007,13(4):237-239.
[8]马宁,张艳.基于ANSYS二次开发的埋地管道应力分析软件及实现[J].油气储运,2016,35(6):625-628.MA N,ZHANG Y.Development of stress analysis software for buried pipelines based on re-development of ANSYS[J].Oil&Gas and Transportation,2016,35(6):625-628.
[9]杜少轩,韩阳,段君峰,等.埋地管道应力的数值分析[J].铜业工程,2017(2):50-52.DU S X,HAN Y,DUAN J F,et al.Numerical analysis of buried pipeline stress[J].Copper Engineering,2017(2):50-52.
[10]刘仕鳌,蒲红宇,刘书文,等.埋地管道应力分析方法[J].油气储运,2012,31(4):274-278.LIU S A,PU H Y,LIU S W,et al.Stress analysis method of buried pipeline[J].Oil&Gas and Transportation,2012,31(4):274-278.
[11]庞永莉,张小龙.国内外油气长输管道应力分析标准的比较[J].油气储运,2015,34(2):186-189.PANG Y L,ZHANG X L.Comparison of stress analysis criteria for long-distance oil and gas pipeline in China and abroad[J].Oil&Gas Storage and Transportation,2015,34(2):186-189.
[12]沙晓东,陈晓辉,黄坤,等.输气管道应力影响因素分析[J].天然气与石油,2012,31(1):1-4.SHA X D,CHEN X X,HUANG K,et al.Analysis of stress factors of gas pipeline[J].Natural Gas and Oil,2012,31(1):1-4.
[13]陈利琼,吴世娟,卢泓方,等.沼泽地段输气管道应力校核及安全性分析[J].应用力学学报,2015,32(2):2-5.CHEN L Q,WU S J,LU H F,et al.Stress checking and safety analysis of gas pipeline in the marsh area[J].Chinese Journal of Applied Mechanics,2015,32(2):2-5.
[14]王迪,刘恩斌.天然气站场管道应力分析[J].管道技术与设备,2015(2):9-12.WANG D,LIU E B.Stress analysis of natural gas station pipelines[J].Pipeline Technique and Equipment,2015(2):9-12.
[15]唐菁菁,蔡春梅,张世忱.工艺管道应力分析中对偶然载荷的静态处理[J].化工设备与管道,2014,51(1):83-86.TANG J J,CAI C M,ZHANG S C.Static method for occasional loads used in analysis of stresses in process piping[J].Process Equipment&Piping,2014,51(1):83-86.
[16]周俊明,李晓明.浅谈管道静力学分析模拟失真现象[J].化工设备与管道,2011,48(5):44-47.ZHOU J M,LI X M.Brief discussion of simulation of distortion phenomenon by using statics analysis[J].Process Equipment&Piping,2011,48(5):44-47.
[17]张振永,郭彬,管军,等.超大输量天然气管道工艺方案筛选[J].油气储运,2013,32(8):857-862.ZHANG Z Y,GUO B,GUAN J,et al.Selection of transmission program for super-throughput gas pipeline[J].Oil&Gas Storage and Transportation,2013,32(8):857-862.
[18]倪姗姗,黄冬,胡开胜,等.西气东输二线站场收发球筒位移原因及解决方案[J].油气储运,2015,34(11):1250-1254.NI S S,HUANG D,HU K S,et al.Causes and solution for displacements of pig launchers and receivers in stations along2nd West-to-East Gas Pipeline[J].Oil&Gas Atorage and Transportation,2015,34(11):1250-1254.
[19]傅文奎,李霖,王尚林,等.天然气管道作业风险管理与预控措施[J].油气储运,2011,30(7):534-535.FU W K,LI L,WANG S L,et al.Construction risk management and precontrol measures of natural gas pipeline[J].Oil&Gas Storage and Transportation,2011,30(7):534-535.
[20]张平,李可夫,邵勇,等.油气管道并行敷设风险分析[J].油气储运,2013,32(9):1027-1033.ZHANG P,LI K F,SHAO Y,et al.Risk analysis for installation of parallel oil&gas pipelines[J].Oil&Gas Storage and Transportation,2013,32(9):1027-1033.
[21]郭小强,黄丽,张黎明,等.油气长输管道并行敷设间距设计[J].油气储运,2009,28(9):46-48.GUO X Q,HUANG L,ZHANG L M,et al.Design of parallel laying spacing of oil and gas long-distance pipelines[J].Oil&Gas Storage and Transportation,2009,28(9):46-48.
[22]许砚新,马学海,庞宝华,等.天然气管道与原油管道并行敷设的安全间距[J].油气储运,2011,30(11):816-818.XU Y X,MA X H,PANG B H,et al.Determination of safety distance for parallelly laid natural gas/oil pipelines[J].Oil&Gas Storage and Transportation,2011,30(11):816-818.
[23]向波.并行管道安全间距及保护措施研究[J].天然气与石油,2009,27(3):1-3.XIANG B.Research on safety distance and protection measures of parallel pipeline[J].Natural Gas and Oil,2009,27(3):1-3.