隧道开挖引起地下管线竖向位移的初参数法求解
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摘要
现有解析法对隧道开挖导致临近地下管线产生位移的分析较少且考虑影响因素不全面.针对这一问题,在W inkler弹性地基梁理论基础上,建立管线竖向位移的计算模型,提出求解隧道开挖引起的临近地下管线竖向位移的初参数法.通过采用ABAQUS软件中的管土相互作用模块进行管线变形的有限元数值模拟,验证了计算方法的正确性.工程实例的计算结果和实测数据的对比表明文中计算方法的合理性.初参数法综合考虑管线和土体双重因素的影响,克服了已有方法的局限性,且计算结果符合实测管线位移小于自由场土体位移规律.
Existing analytic methods for analyzing the displacement of buried pipelines caused by tunnel excavation could be rarely found,and they did not consider all the influence factors usually.Based on Winkler elastic foundation beam theory,a model for calculating vertical displacement of pipelines was established.An initial parameter method for solving vertical displacement of adjacent buried pipeline caused by tunnel excavation was proposed.A numerical calculation of buried pipelines displacement was conducted by pipe-soil modulus of ABAQUS software to prove the validity of the method.The rationality of initial parameter method was proved by comparison between the calculating result and the field test result.Due to considering the dual effect of pipeline and soil,the initial parameter method overcomed the shortage of previous method.The analytic results agreed well with the general rule that the measured displacement of pipelines was smaller than that of free field soil.
Existing analytic methods for analyzing the displacement of buried pipelines caused by tunnel excavation could be rarely found,and they did not consider all the influence factors usually.Based on Winkler elastic foundation beam theory,a model for calculating vertical displacement of pipelines was established.An initial parameter method for solving vertical displacement of adjacent buried pipeline caused by tunnel excavation was proposed.A numerical calculation of buried pipelines displacement was conducted by pipe-soil modulus of ABAQUS software to prove the validity of the method.The rationality of initial parameter method was proved by comparison between the calculating result and the field test result.Due to considering the dual effect of pipeline and soil,the initial parameter method overcomed the shortage of previous method.The analytic results agreed well with the general rule that the measured displacement of pipelines was smaller than that of free field soil.
引文
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[11]龙驭球.弹性地基梁的计算[M].北京:人民教育出版社,1982.
[12]马涛.隧道施工引起的地层位移及其对邻近地下管线的影响分析[D].长沙:长沙理工大学,2005.
[2]高文华.基坑变形预测与邻近建筑及设施的保护研究[D].长沙:湖南大学,2001.
[3]章昕,李俊才,刘翔.南京软土地区隧道盾构法施工引起的横向地表变形计算方法[J].南京工业大学学报:自然科学版,2008,30(2):64-68.Zhang Xin,Li Juncai,Liu Xiang.Calculation method of groundsettlement along the tunnel transversal section caused by shieldconstruction in soft ground[J].Journal of Nanjing University ofTechnology:Natural Science Edition,2008,30(2):64-68.
[4]杨海芹,李俊才,陈志宁,等.浅埋暗挖隧道施工中纵向地表下沉的规律[J].南京工业大学学报:自然科学版,2008,30(3):56-60.Yang Haiqin,Li Juncai,Chen Zhining,et al.Investigation on lon-gitudinal ground subsidence caused by shallow tunnel excavation[J].Journal of Nanjing University of Technology:Natural ScienceEdition,2008,30(3):56-60.
[5]Takagi N,Shimamura K,Nishio N.Buried pipe response to adja-cent ground movements associated with tunneling and excavations[C]∥Ground Movements and Structures Proceedings of the 3rdInternational Conference.London:Pentech press,1985.
[6]Attewell P E.Soil movements induced by tunneling and the effectson pipelines and structures[M].London:Blackie,1986.
[7]廖少明,刘建航.基坑工程手册[M].北京:中国建筑工业出版社,1997.
[8]Assaf K,Vorster TE B,Kenichi S,et al.Soil-pipe-tunnel interac-tion:comparison between winker and elastic continuum solution[R].Cambridge:Technical Report of the University of Cam-bridge,2004.
[9]Vorster TE B,Assaf K,Kenichi S,et al.Estimating the effects oftunneling on existing pipelines[J].Journal of Geotechnical andGeo-Environmental Engineering,2005,131(11):1399-1410.
[10]岳庆霞,吴华勇,李杰.管土动力相互作用分析[J].地震工程与工程震动,2007,27(3):132-136.Yue Qingxia,Wu Huayong,Li Jie.Analysis of pipe-soil dynamicinteraction[J].Journal of Earthquake Engineering and Engineer-ing Vibration,2007,27(3):132-136.
[11]龙驭球.弹性地基梁的计算[M].北京:人民教育出版社,1982.
[12]马涛.隧道施工引起的地层位移及其对邻近地下管线的影响分析[D].长沙:长沙理工大学,2005.
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