盾构隧道与竖井连接处管片及接头震害分析  

ANALYSIS OF SEISMIC DAMAGE OF SEGMENTS AND JOINTS AT THE JUNCTION OF SHIELD TUNNEL AND SHAFT

作　　者：赵武胜[1] 何先志[2] 陈卫忠[1] 田洪铭[1] 袁克阔[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《岩石力学与工程学报》2012年第A02期3847-3854,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重大国际合作项目(50720135906);国家自然科学基金资助项目(41072238;51009133)

摘　　要：建立弹性、刚性与柔性盾构隧道接头力学模型,考虑管片间及管片与地层间相互作用,结合南京纬三路越江盾构隧道,研究盾构隧道竖井连接处管片及接头震害机制及影响因素。结果表明:在地震荷载作用下,采用柔性接头时,管片、接头震害较弱但管片相对位移较大;采用刚性接头塑性区范围明显变大但管片相对位移较小,采用弹性接头相对位移与塑性区折中。另外,竖井外一定范围土体的加固及管片与地层间的接触非线性对管片及接头的震害影响较大。上述结论与盾构隧道震害资料吻合较好,可为类似工程抗震设计提供参考。Models for elastic,flexible and rigid joints were established.Considering the interaction between structure and soil,failure mechanism and influential factors of segments and joints at the junction of shield tunnel and shaft were studied under different working conditions based on cross-river tunnel at Weisan Road in Nanjing.The results show that segments and joints bear large internal forces and small displacements using rigid joints,while flexible joints result in smaller internal forces and larger relative displacements.The corresponding response of elastic joints is between those of flexible joints and rigid joints.The mechanical parameters of soil and slip between contact faces significantly influence the seismic response of segments and joints.The conclusions are in good agreement with seismic damage data,which can provide references for seismic design of similar projects.

关 键 词：隧道工程 竖井 管片 接头 相互作用 震害 

分 类 号：U45[建筑科学—桥梁与隧道工程]