地裂缝环境下SRTP埋地管道性状
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摘要
以陕西西安市政工程中SRTP埋地管道30°斜交穿越地裂缝带为工程背景,基于足尺模型试验和数值模拟计算,研究了地裂缝沉降作用下埋地管道的变形与受力特点。结果表明:地裂缝沉降作用下,SRTP埋地管道沉降位移明显小于或滞后于地层变形,其沉降变形特征具有明显的"衰减效应";地裂缝作用下,SRTP埋地管道受力变形模式为拉张-挤压弯曲变形模式,位于地裂缝上盘的管道顶部受压应力、底部受拉应力,而位于下盘的管道顶部受拉应力、底部受压应力,具有反对称现象,SRTP埋地管道适应地裂缝大变形的能力较强;地裂缝沉降作用对SRTP埋地管道的纵向影响长度为3.0m,即上盘1.8m和下盘1.2m,在此范围内管道需要采取适当保护措施;地裂缝沉降作用下,管道沿纵向可划分为3段,即上盘沉降段、脱空段和下盘翘曲段,其中,脱空段范围约为1.2m。
Taking SRTP buried pipeline obliquely crossing the ground fissure belt(30°)in Xi'an of Shaanxi as engineering background,the deformation and stress characteristics of buried pipeline under the settlement action of ground fissure were studied based on the full-scale model test and numerical simulation calculation.The results show that the settlement displacement of SRTP buried pipeline under the settlement action of ground fissure is much less than or lags behind stratum deformation,and this phenomenon has an obvious characteristic of"attenuation effect";the force deformation mode of SRTP buried pipeline under the settlement action of ground fissure is tension-compression bending,namely,the top of pipeline is in compression at the hanging wall and in tension at the footwall,and the bottom of pipeline is in tension at the hanging wall and in compression at the footwall,indicating an antisymmetric phenomenon and a good performance to adapt to the deformation of ground fissure;the influence scope of SRTP buried pipeline under the settlement action of ground fissure is about 3.0m,namely,1.2matthe footwall and 1.8mat the hanging wall,so the protective measures of pipeline should be taken in this influence scope;the pipeline under the settlement action of ground fissure can be divided into three sections,including settlement section in the hanging wall,gap section and warping section in the footwall,and the scope of gap section is about 1.2m.
Taking SRTP buried pipeline obliquely crossing the ground fissure belt(30°)in Xi'an of Shaanxi as engineering background,the deformation and stress characteristics of buried pipeline under the settlement action of ground fissure were studied based on the full-scale model test and numerical simulation calculation.The results show that the settlement displacement of SRTP buried pipeline under the settlement action of ground fissure is much less than or lags behind stratum deformation,and this phenomenon has an obvious characteristic of"attenuation effect";the force deformation mode of SRTP buried pipeline under the settlement action of ground fissure is tension-compression bending,namely,the top of pipeline is in compression at the hanging wall and in tension at the footwall,and the bottom of pipeline is in tension at the hanging wall and in compression at the footwall,indicating an antisymmetric phenomenon and a good performance to adapt to the deformation of ground fissure;the influence scope of SRTP buried pipeline under the settlement action of ground fissure is about 3.0m,namely,1.2matthe footwall and 1.8mat the hanging wall,so the protective measures of pipeline should be taken in this influence scope;the pipeline under the settlement action of ground fissure can be divided into three sections,including settlement section in the hanging wall,gap section and warping section in the footwall,and the scope of gap section is about 1.2m.
引文
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[10]刘嘉斌,马跟良,苏岗,等.燃气管道穿越地裂缝的处理[J].煤气与热力,2002,22(3):224-226.LIU Jia-bin,MA Gen-liang,SU Gang,et al.Treatment for Gas Pipeline Crossing Ground Fissure[J].Gas and Heat,2002,22(3):224-226.
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[12]马广超.西安地裂缝对地下排水管道的破坏及防治[J].灾害学,2005,20(3):108-111.MA Guang-Chao.The Damages to Underground Drainage Pipelines Caused by Ground Fissures in Xi'an[J].Journal of Catastrophology,2005,20(3):108-111.
[13]KOKAVESSIS N K,ANAGNOSTIDIS G S.Finite Element Modeling of Buried Pipelines Subjected to Seismic Loads:Soil Structure Interaction Using Contact Elements[C]∥The American Society of Mechanical Engineers.ASME 2006Pressure Vessels and Piping/ICPVT-11Conference.Vancouver:The American Society of Mechanical Engineers,2006:119-125.
[14]朱庆杰,陈艳华,蒋录珍,等.场地和断层对埋地管道破坏的影响分析[J].岩土力学,2008,29(9):2392-2396.ZHU Qing-jie,CHEN Yan-hua,JIANG Lu-zhen,et al.Influences of Site and Faults on Damage of Buried Pipelines[J].Rock and Soil Mechanics,2008,29(9):2392-2396.
[15]门玉明,石玉玲.西安地裂缝研究中的若干重要科学问题[J].地球科学与环境学报,2008,30(2):172-176.MEN Yu-ming,SHI Yu-ling.Some Important Scientific Questions in the Research on Xi'an Ground Fissures[J].Journal of Earth Sciences and Environment,2008,30(2):172-176.
[16]陈志磊.地基沉陷引起地下PE管道变形破坏的试验与分析[D].太原:太原理工大学,2013.CHEN Zhi-lei.Experimental Research and Analysis of the Pipeline Deformation Mechanism Caused by Subsoil Settlement[D].Taiyuan:Taiyuan University of Technology,2013.
[17]VAZOURAS P,KARAMANOS S A,DAKOULAS P.Mechanical Behavior of Buried Steel Pipes Crossing Active Strike-slip Faults[J].Soil Dynamics and Earthquake Engineering,2012,41:164-180.
[18]曹建国.场地大变形下供水管道破坏试验及地震安全评估[D].杭州:浙江大学,2014.CAO Jian-guo.Test and Seismic Assessment of Water Supply Pipeline Under Large Ground Deformation[D].Hangzhou:Zhejiang University,2014.
[19]黄强兵,梁奥,门玉明,等.地裂缝活动对地下输水管道影响的足尺模型试验[J].岩石力学与工程学报,2016,35(增1):2968-2977.HUANG Qiang-bing,LIANG Ao,MEN Yu-ming,et al.Full-scale Model Test on Behaviors of Urban Underground Water Delivery Pipeline Crossing Active Ground Fissure Zone[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(S1):2968-2977.
[20]邹蓉.地裂缝对地下管道的影响研究[D].西安:长安大学,2009.ZOU Rong.Research of Underground Pipelines Crossing over Ground Fissure[D].Xi'an:Chang'an University,2009.
[2]王景明.地裂缝及其灾害的理论与应用[M].西安:陕西科学技术出版社,2000.WANG Jing-ming.Theory of Ground Fissures Hazards and Its Application[M].Xi'an:Shaanxi Science and Technology Press,2000.
[3]彭建兵,张勤,黄强兵,等.西安地裂缝灾害[M].北京:科学出版社,2012.PENG Jian-bing,ZHANG Qin,HUANG Qiang-bing,et al.Ground Fissure Hazards in Xi'an[M].Beijing:Science Press,2012.
[4]彭建兵,卢全中,黄强兵,等.汾渭盆地地裂缝灾害[M].北京:科学出版社,2017.PENG Jian-bing,LU Quan-zhong,HUANG Qiang-bing,et al.Ground Fissure Hazards in Fenwei Basin[M].Beijing:Science Press,2017.
[5]黄强兵.地裂缝对地铁隧道的影响机制及病害控制研究[D].西安:长安大学,2009.HUANG Qiang-bing.Study on Effect of the Active Ground Fissure on Metro Tunnel and Its Hazards Control[D].Xi'an:Chang'an University,2009.
[6]黄强兵,彭建兵,樊红卫,等.西安地裂缝对地铁隧道的危害及防治措施研究[J].岩土工程学报,2009,31(5):781-788.HUANG Qiang-bing,PENG Jian-bing,FAN Hongwei,et al.Metro Tunnel Hazards Induced by Active Ground Fissures in Xi'an and Relevant Control Measures[J].Chinese Journal of Geotechnical Engineering,2009,31(5):781-788.
[7]石玉玲,门玉明,刘洋,等.西安市地裂缝对城市立交的破坏机理及防治措施[J].地球科学与环境学报,2009,31(1):89-93.SHI Yu-ling,MEN Yu-ming,LIU Yang,et al.Research on the Destruction Mechanism of City Overpass by Ground Fissure in Xi'an City and the Controlling Measures[J].Journal of Earth Sciences and Environment,2009,31(1):89-93.
[8]KENNEDY R P,WILLIAMSON R A,CHOW A M,et al.Fault Movement Effects on Buried Oil Pipeline[J].Transportation Engineering Journal of ASCE,1977,103(5):617-633.
[9]高惠瑛,冯启民.场地沉陷埋地管道反应分析方法[J].地震工程与工程振动,1997,17(1):68-75.GAO Hui-ying,FENG Qi-min.Response Analysis for Buried Pipelines Through Settlement Zone[J].Earthquake Engineering and Engineering Vibration,1997,17(1):68-75.
[10]刘嘉斌,马跟良,苏岗,等.燃气管道穿越地裂缝的处理[J].煤气与热力,2002,22(3):224-226.LIU Jia-bin,MA Gen-liang,SU Gang,et al.Treatment for Gas Pipeline Crossing Ground Fissure[J].Gas and Heat,2002,22(3):224-226.
[11]毛应生,柳丽英,王德信,等.西安市地裂对市政构筑物的破坏机理与对策的探讨[J].城市道桥与防洪,2002(2):1-6.MAO Ying-sheng,LIU Li-ying,WANG De-xin,et al.Approach to Mechanism and Countermeasure of Municipal Structures Destroyed by Ground Cracking in Xi'an City[J].Urban Roads Bridges and Flood Control,2002(2):1-6.
[12]马广超.西安地裂缝对地下排水管道的破坏及防治[J].灾害学,2005,20(3):108-111.MA Guang-Chao.The Damages to Underground Drainage Pipelines Caused by Ground Fissures in Xi'an[J].Journal of Catastrophology,2005,20(3):108-111.
[13]KOKAVESSIS N K,ANAGNOSTIDIS G S.Finite Element Modeling of Buried Pipelines Subjected to Seismic Loads:Soil Structure Interaction Using Contact Elements[C]∥The American Society of Mechanical Engineers.ASME 2006Pressure Vessels and Piping/ICPVT-11Conference.Vancouver:The American Society of Mechanical Engineers,2006:119-125.
[14]朱庆杰,陈艳华,蒋录珍,等.场地和断层对埋地管道破坏的影响分析[J].岩土力学,2008,29(9):2392-2396.ZHU Qing-jie,CHEN Yan-hua,JIANG Lu-zhen,et al.Influences of Site and Faults on Damage of Buried Pipelines[J].Rock and Soil Mechanics,2008,29(9):2392-2396.
[15]门玉明,石玉玲.西安地裂缝研究中的若干重要科学问题[J].地球科学与环境学报,2008,30(2):172-176.MEN Yu-ming,SHI Yu-ling.Some Important Scientific Questions in the Research on Xi'an Ground Fissures[J].Journal of Earth Sciences and Environment,2008,30(2):172-176.
[16]陈志磊.地基沉陷引起地下PE管道变形破坏的试验与分析[D].太原:太原理工大学,2013.CHEN Zhi-lei.Experimental Research and Analysis of the Pipeline Deformation Mechanism Caused by Subsoil Settlement[D].Taiyuan:Taiyuan University of Technology,2013.
[17]VAZOURAS P,KARAMANOS S A,DAKOULAS P.Mechanical Behavior of Buried Steel Pipes Crossing Active Strike-slip Faults[J].Soil Dynamics and Earthquake Engineering,2012,41:164-180.
[18]曹建国.场地大变形下供水管道破坏试验及地震安全评估[D].杭州:浙江大学,2014.CAO Jian-guo.Test and Seismic Assessment of Water Supply Pipeline Under Large Ground Deformation[D].Hangzhou:Zhejiang University,2014.
[19]黄强兵,梁奥,门玉明,等.地裂缝活动对地下输水管道影响的足尺模型试验[J].岩石力学与工程学报,2016,35(增1):2968-2977.HUANG Qiang-bing,LIANG Ao,MEN Yu-ming,et al.Full-scale Model Test on Behaviors of Urban Underground Water Delivery Pipeline Crossing Active Ground Fissure Zone[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(S1):2968-2977.
[20]邹蓉.地裂缝对地下管道的影响研究[D].西安:长安大学,2009.ZOU Rong.Research of Underground Pipelines Crossing over Ground Fissure[D].Xi'an:Chang'an University,2009.
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