紧邻多孔交叠隧道抗震性能研究
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摘要
随着我国城市轨道交通建设的飞速发展,盾构隧道之间近距离相互穿越工程将会越来越多。武汉市轨道交通2号线与4号线在洪(洪山广场)中(中南路)区间为4孔紧邻交叠隧道。根据实际工程特点,将其简化为不同间距的4孔平行重叠和4孔垂直交叉隧道,分别建立其三维计算模型,分析了紧邻多孔交叠隧道的三维地震响应,其中考虑了不同地震波幅值、隧道间距、隧道空间位置、隧道管片横、纵向差异以及紧邻多孔盾构隧道间加固层的影响,从结构变形和受力两方面评价了其抗震性能。计算分析表明:(1)隧道间距对隧道地震响应影响不显著;(2)4孔垂直交叉隧道的抗震性能要优于4孔平行重叠隧道;(3)紧邻多孔交叠隧道具有良好的抗震性能,满足抗震要求。其研究成果可为今后类似工程的抗震初步设计提供参考。
More and more shield tunnels will crossing each other with very short distance with the rapid development of urban rail transit construction in China.There are four tunnels crossing each other between Hongshan Square Station and Zhongnan Road Station,which are the second line and the fourth line of Wuhan rail transit.The complicated multi-tunnels were simplified as four parallel tunnels and four perpendicular tunnels with different distances according to their practical characters.Three dimensional calculation models are established and their seismic responses are analyzed,in which the following aspects are considered: amplitudes seismic waves,tunnel net distance,tunnel space position,the difference of segment stiffness and the reinforced layer between tunnels.And then,their seismic capabilities are evaluated through two aspects: structure deformation and component internal forces.The analytical results show,(1) The net distances between tunnels have little influence on tunnel seismic responses;(2) The seismic capabilities of four perpendicular tunnels is superior to that of four parallel tunnels.(3) Adjacent overlapping multi-tunnels have good seismic capabilities and can satisfy seismic requirement.The research results can provide preliminary design for relevant practical engineering in future.
More and more shield tunnels will crossing each other with very short distance with the rapid development of urban rail transit construction in China.There are four tunnels crossing each other between Hongshan Square Station and Zhongnan Road Station,which are the second line and the fourth line of Wuhan rail transit.The complicated multi-tunnels were simplified as four parallel tunnels and four perpendicular tunnels with different distances according to their practical characters.Three dimensional calculation models are established and their seismic responses are analyzed,in which the following aspects are considered: amplitudes seismic waves,tunnel net distance,tunnel space position,the difference of segment stiffness and the reinforced layer between tunnels.And then,their seismic capabilities are evaluated through two aspects: structure deformation and component internal forces.The analytical results show,(1) The net distances between tunnels have little influence on tunnel seismic responses;(2) The seismic capabilities of four perpendicular tunnels is superior to that of four parallel tunnels.(3) Adjacent overlapping multi-tunnels have good seismic capabilities and can satisfy seismic requirement.The research results can provide preliminary design for relevant practical engineering in future.
引文
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[2]刘晶波,李彬,刘祥庆.地下结构抗震设计中的静力弹塑性分析方法[J].土木工程学报,2007,40(7):68-76.LIU Jing-bo,LI Bin,LIU Xiang-qing.A staticelasto-plastic analysis method in seismic design ofunderground structures[J].China Civil EngineeringJournal,2007,40(7):68-76.
[3]HUO H,BOBET A,FERNáNDEZ G.et al.Load transfermechanisms between underground structure andsurrounding ground:Evaluation of the failure of theDaikai station[J].Journal of Geotechnical andGeoenvironmental Engineering,2005,131(12):1522-1533.
[4]SAMATA S,OHUCHI H,MATSUDA T.A study of thedamage of subway structures during the 1995Hanshin-Awaji earthquake[J].Cement and ConcreteComposites,1997,19(3):223-239.
[5]姜忻良,谭丁,姜南.交叉隧道地震反应三维有限元和无限元分析[J].天津大学学报,2004,37(4):307-311.JIANG Xin-liang,TAN Ding,JIANG Nan.3D Finite andInfinite element analysis for seismic response ofintersecting tunnel[J].Journal of Tianjin University,2004,37(4):307-311.
[6]陈磊,陈国兴,李丽梅.近场和远场地震动作用下双层竖向重叠地铁隧道地震反应特性[J].中国铁道科学,2010,31(1):79-86.CHEN Lei,CHEN Guo-xing,LI Li-mei.Seismicresponse characteristics of the double-layer verticaloverlapping metro tunnels under near-field and far-fieldground motions[J].China Railway Science,2010,31(1):79-86.
[7]MIGLIAZZA M,CHIORBOLI M M,GIANI G P.Comparison of analytical method,3D finite elementmodel with experimental subsidence measurementsresulting from the extension of the Milan underground[J].Computers and Geotechnics,2009,36(1-2):113-124.
[8]YAMAGUCHI I,YAMAZAKI I,KIRITANI Y.Study ofground-tunnel interactions of four shield tunnels driven inclose proximity,in relation to design and construction ofparallel shield tunnels[J].Tunnelling and UndergroundSpace Technology,1998,13(3):289-304.
[9]孔戈.盾构隧道地震响应分析及抗减震措施研究[D].上海:同济大学,2007.
[10]Itasca Consulting Group Inc.Fast lagrangian analysis ofcontinua in 3 dimensions[R].Minneapolis:ItascaConsulting Group,Inc.,2002.
[11]何川,苏宗贤,曾东洋.盾构隧道施工对已建平行隧道变形和附加内力的影响研究[J].岩石力学与工程学报,2007,26(10):2063-2069.HE Chuan,SU Zong-xian,ZENG Dong-yang.Researchon influence of shield tunnel construction on deformationand secondary inner force of constructed parallel tunnel[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(10):2063-2069.
[12]STAMOS A A,BESKOS D E.3-D seismic responseanalysis of long lined tunnels in half-space[J].SoilDynamics and Earthquake Engineering,1996,15(2):111-118.
[13]中国建筑科学研究院.GB50011-2011建筑抗震设计规范[S].北京:中国建筑工业出版社,2011.
[14]龚晓南.对岩土工程数值分析的几点思考[J].岩土力学,2011,3(2):321-325.GONG Xiao-nan.Reflections on numerical analysis ofgeotechnical engineering[J].Rock and Soil Mechanics,2011,32(2):321-325.
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