工作竖井与隧道连接处支护结构横向地震响应
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摘要
建立了工作竖井与盾构隧道、明挖隧道相连的空间交叉结构三维模型,采用FLAC3D对该复杂结构进行了横向地震响应分析,得到了工作竖井与隧道连接处支护结构关键点的位移和应力响应规律。通过对地震横向激励过程中竖井与隧道连接处支护结构收敛位移和关键点主应力峰值的分析,对该结构的横向抗震性能做出了评价。
Three dimensional model of spatial crossing structure by which working shaft is connected with shield-driven tunnel and open cut tunnel was established.Transverse seismic response analysis of the complicated structure was done by use of FLAC3D.Displacement and stress response rule of key point in the supporting structure of joint between working shaft and tunnel was gained.Convergence displacement of the supporting structure of joint between working shaft and tunnel,principal stress of key point were analyzed for the process of transverse seismic excitation,then antiseismic characteristic of the structure was evaluated.
Three dimensional model of spatial crossing structure by which working shaft is connected with shield-driven tunnel and open cut tunnel was established.Transverse seismic response analysis of the complicated structure was done by use of FLAC3D.Displacement and stress response rule of key point in the supporting structure of joint between working shaft and tunnel was gained.Convergence displacement of the supporting structure of joint between working shaft and tunnel,principal stress of key point were analyzed for the process of transverse seismic excitation,then antiseismic characteristic of the structure was evaluated.
引文
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[3]刘晶波,李彬.地铁地下结构抗震分析及设计中的几个关键问题[J].土木工程学报,2006,39(6):106-110.
[4]姜忻良,宋丽梅.软土地层中地下隧道结构地震反应分析[J].地震工程与工程振动,1999,19(1):65-69.
[5]国胜兵,赵毅,赵跃堂等.地下结构在竖向和水平地震荷载作用下的动力分析[J].地下空间,2002,22(4):314-318.
[6]祝彦知,冯紫良,方志.地震动下考虑各向异性土体-盾构隧道数值模拟[J].岩土力学,2005,26(5):710-716.
[7]周健,孔戈,秦天.盾构隧道动力有效应力分析方法研究[J].岩石力学与工程学报,2007,26(7):1416-1425.
[8]吴晓峰,周健,董鹏.软土地层中双圆盾构法隧道的抗震分析[J].工程抗震,2004,(4):27-31.
[9]杨小礼,张丙强,王志斌,等.浅埋大跨度连拱隧道地震反应分析[J].中南大学学报,2006,37(5):991-996.
[10]袁大军,黄清飞,王梦恕,等.水底液化地层大型盾构隧道地震响应分析[J].岩石力学与工程学报,2007,26(增2):3609-3615.
[11]郭军,王明年,田尚志.高烈度地震区公路隧道明洞抗震计算分析[J].岩土工程学报,2007,29(11):1733-1736.
[12]肖诗云.混凝土率型本构模型及其在拱坝动力分析中的应用[D].大连:大连理工大学,2002.
[13]尹旅超,朱振宏,李玉珍,等.日本隧道盾构新技术[M].武汉:华中科技大学出版社,1999:76-79.
[14]黄正荣.基于壳一弹簧模型的盾构衬砌管片受力特性研究[D].南京:河海大学,2006.
[15]黄正荣,朱伟,梁精华.修正惯用法管片环弯曲刚度有效率η和弯矩提高率ξ的研究[J].地下空间,2003,23(4):44-49.
[16]张海波.地铁隧道盾构法施工对周围环境影响的数值模拟[D].南京:河海大学,2005.
[17]张海波,殷宗泽,朱俊高,等.盾构法隧道衬砌施工阶段受力特性的三维有限元模拟[J].岩土力学,2005,26(6):990-994.
[18]叶耀东.软土地区运营地铁盾构隧道结构变形及健康诊断方法研究[D].上海:同济大学,2007.
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