盾构隧道地震响应分析方法及工程应用
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摘要
盾构隧道在地震作用下可发生接头螺栓剪断、管片开裂、管片端部混凝土脱落、大变形及错台等震害,将影响隧道的安全与正常使用,因此,建立合理的分析模型与计算方法来研究隧道可能的震害具有重要的工程防震减灾意义。采用嵌入梁单元模拟接头,厚壳单元模拟管片,无限元作为动力人工边界,同时在管片之间及管片与地层间设置非连续接触关系,更好地模拟了管片厚度方向应力及管片与地层间的相互作用,建立了厚壳-接触-无限元地震响应分析模型。并将该模型运用于某大直径越江盾构隧道的抗震分析中,计算结果与盾构隧道震害特征较为吻合,表明该模型可反映盾构隧道的真实地震动响应。并应用该模型分析了壁后注浆层材料参数及结构与土体相互作用对管片动力响应的影响。所建模型对于研究盾构或TBM施工隧道的震害分析具有很好的推广价值。
Seismic load can bring serious damage to shield tunnel.Reasonable seismic analysis of tunnel can help to reduce or avoid potential seismic hazard.So it is necessary to establish efficient model for seismic response of shield tunnel.Segment connectors are simulated by embedded beam elements,and segments are simulated by thick shell elements.At the same time,noncontinuous contact is built between segments and between segment and surrounding soil,which can better simulate stress in thickness direction and the interaction between segments.Thereby,the thick shell-contact-infinite element model for dynamic analysis of shield tunnel is built.Actual seismic disaster data and project results prove that the model has good accuracy.Finally,the model is used to analyze grouting material parameters and contact nonlinearity on the impact of seismic response of segments.This model has a good popularization value for seismic disaster analysis of shield tunnels or tunnels constructed by TBM.
Seismic load can bring serious damage to shield tunnel.Reasonable seismic analysis of tunnel can help to reduce or avoid potential seismic hazard.So it is necessary to establish efficient model for seismic response of shield tunnel.Segment connectors are simulated by embedded beam elements,and segments are simulated by thick shell elements.At the same time,noncontinuous contact is built between segments and between segment and surrounding soil,which can better simulate stress in thickness direction and the interaction between segments.Thereby,the thick shell-contact-infinite element model for dynamic analysis of shield tunnel is built.Actual seismic disaster data and project results prove that the model has good accuracy.Finally,the model is used to analyze grouting material parameters and contact nonlinearity on the impact of seismic response of segments.This model has a good popularization value for seismic disaster analysis of shield tunnels or tunnels constructed by TBM.
引文
[1]小泉淳.盾构隧道的抗震研究及算例[M].北京:中国建筑工业出版社,2009.
[2]侯公羽,杨悦,刘波.盾构管片接头模型的改进及管片内力的数值计算[J].岩石力学与工程学报,2007,26(增刊2):4284-4286.HOU Gong-yu,YANG Yue,LIU Bo.Improved jointmodel of shield tunnel segments and numericalcalculation of inner forces[J].Chinese Journal of RockMechanics and Engineering,2007,26(Supp.2):4284-4286.
[3]官林星,朱合华,于宁.考虑荷载工况组合的盾构衬砌横向受力分析[J].岩土力学,2004,25(8):1302-1306.GUAN Lin-xing,ZHU He-hua,YU Ning.Analysis ofinternal force of shield lining in cross-section consideringload combination[J].Rock and Soil Mechanics,2004,25(8):1302-1306.
[4]张建刚,何川,杨征.大断面宽幅盾构管片三维内力分布分析[J].岩土力学,2009,30(7):2058-2062.ZHANG Jian-gang,HE Chuan,YANG Zheng.Analysisof 3D internal forces distribution of wide segment liningfor large-section shield tunnel[J].Rock and SoilMechanics,2009,30(7):2058-2062.
[5]张建刚,何川,杨征.武汉长江隧道管片衬砌结构受幅宽影响的力学分布特征研究[J].岩石力学与工程学报,2007,26(增刊2):3764-3768.ZHANG Jian-gang,HE Chuan,YANG Zheng.Study ofmechanical distribution characteristic of lining structureinfluenced by segment width for Wuhan Yangtze Rivertunnel[J].Chinese Journal of Rock Mechanics andEngineering,2007,26(Supp.2):3764-3768.
[6]CHOI JUN SEONG,LEE JONG SEH,MEMBER ASCE,et al.Nonlinear earthquake response analysis of 2-Dunderground structures with soil-structure interactionincluding separation and sliding at interface[C]//15thASCE Engineering Mechanic conference.New York:Columbia,2002:1-8.
[7]苏宗贤,何川.盾构隧道管片衬砌内力分析的壳-弹簧-接触模型及其应用[J].工程力学,2007,24(10):131-136.SU Zong-xian,HE Chuan.Shell-spring-contact model forshield tunnel segmental lining analysis and itsapplication[J].Engineering Mechanics,2007,24(10):131-136.
[8]周维垣.高等岩石力学[M].北京:水利电力出版社,1990.
[9]黄胜,陈卫忠,杨建平.地下工程地震动力响应及抗震研究[J].岩石力学与工程学报,2009,28(3):483-490.HUANG Sheng,CHEN Wei-zhong,YANG Jian-ping,et al.Research on earthquake-induced dynamic responses andaseismic measures for underground engineering[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(3):0483-0490.
[10]中华人民共和国住房与城乡建设部.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[11]罗超红,付亚伟.盾构壁后充填注浆材料分析[J].公路与汽运,2007,(5):176-178.
[2]侯公羽,杨悦,刘波.盾构管片接头模型的改进及管片内力的数值计算[J].岩石力学与工程学报,2007,26(增刊2):4284-4286.HOU Gong-yu,YANG Yue,LIU Bo.Improved jointmodel of shield tunnel segments and numericalcalculation of inner forces[J].Chinese Journal of RockMechanics and Engineering,2007,26(Supp.2):4284-4286.
[3]官林星,朱合华,于宁.考虑荷载工况组合的盾构衬砌横向受力分析[J].岩土力学,2004,25(8):1302-1306.GUAN Lin-xing,ZHU He-hua,YU Ning.Analysis ofinternal force of shield lining in cross-section consideringload combination[J].Rock and Soil Mechanics,2004,25(8):1302-1306.
[4]张建刚,何川,杨征.大断面宽幅盾构管片三维内力分布分析[J].岩土力学,2009,30(7):2058-2062.ZHANG Jian-gang,HE Chuan,YANG Zheng.Analysisof 3D internal forces distribution of wide segment liningfor large-section shield tunnel[J].Rock and SoilMechanics,2009,30(7):2058-2062.
[5]张建刚,何川,杨征.武汉长江隧道管片衬砌结构受幅宽影响的力学分布特征研究[J].岩石力学与工程学报,2007,26(增刊2):3764-3768.ZHANG Jian-gang,HE Chuan,YANG Zheng.Study ofmechanical distribution characteristic of lining structureinfluenced by segment width for Wuhan Yangtze Rivertunnel[J].Chinese Journal of Rock Mechanics andEngineering,2007,26(Supp.2):3764-3768.
[6]CHOI JUN SEONG,LEE JONG SEH,MEMBER ASCE,et al.Nonlinear earthquake response analysis of 2-Dunderground structures with soil-structure interactionincluding separation and sliding at interface[C]//15thASCE Engineering Mechanic conference.New York:Columbia,2002:1-8.
[7]苏宗贤,何川.盾构隧道管片衬砌内力分析的壳-弹簧-接触模型及其应用[J].工程力学,2007,24(10):131-136.SU Zong-xian,HE Chuan.Shell-spring-contact model forshield tunnel segmental lining analysis and itsapplication[J].Engineering Mechanics,2007,24(10):131-136.
[8]周维垣.高等岩石力学[M].北京:水利电力出版社,1990.
[9]黄胜,陈卫忠,杨建平.地下工程地震动力响应及抗震研究[J].岩石力学与工程学报,2009,28(3):483-490.HUANG Sheng,CHEN Wei-zhong,YANG Jian-ping,et al.Research on earthquake-induced dynamic responses andaseismic measures for underground engineering[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(3):0483-0490.
[10]中华人民共和国住房与城乡建设部.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[11]罗超红,付亚伟.盾构壁后充填注浆材料分析[J].公路与汽运,2007,(5):176-178.
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