大跨度连拱隧道开挖方法对围岩稳定性影响分析
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摘要
某Ⅲ级围岩场地大跨度双连拱隧道工程为依托,基于弹塑性本构关系和D-P屈服准则,采用"地层-结构"模型,应用ANSYS程序分别对工程中的四种开挖方法(即中导洞全断面开挖、中导洞半断面法、三导洞全断面法、三导洞半断面法等)进行了数值模拟。分析、评价了四种工法条件下的围岩位移场、围岩应力场、支护结构受力三个方面的变化规律,获得了一些有意义的结论,可以为大跨度连拱隧道设计和施工提供参考依据。
Four excavation methods(middle-pilot and full-face,middle-pilot and half-section,three-pilot and full-face and three-pilot and half-section) of the construction of a large-span double-arch tunnel with grade Ⅲ surrounding rock are numerical simulated by means of ANSYS software,on basis of lastic-plastic constitutive relationship and D-P yield criterion and strata-structure mode.Variation rules of displacement of surrounding rock,stress of surrounding rock and force of supporting structure under 4 construction methods are analyzed and evaluated.The conclusions obtained can provide reference for the design and construction of large-span double-arch tunnel.
Four excavation methods(middle-pilot and full-face,middle-pilot and half-section,three-pilot and full-face and three-pilot and half-section) of the construction of a large-span double-arch tunnel with grade Ⅲ surrounding rock are numerical simulated by means of ANSYS software,on basis of lastic-plastic constitutive relationship and D-P yield criterion and strata-structure mode.Variation rules of displacement of surrounding rock,stress of surrounding rock and force of supporting structure under 4 construction methods are analyzed and evaluated.The conclusions obtained can provide reference for the design and construction of large-span double-arch tunnel.
引文
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[2]朱汉华,王迎超,祝江鸿.隧道预支护原理与施工技术[M].北京:人民交通出版社,2008.(ZHU Hanhua,WANG Yingchao,ZHU Jianghong.Pre-supportprinciple and construction technology in tunnel[M].Beijing:China Communications Press,2008.(in Chinese))
[3]涂光钧,段继华.新奥法及在我国采用新奥法的建议[J].铁道建筑,1980(10):6-8.(TU Guangjun,DUANJihua.New austrian tunnelling method and suggestionsabout adopting it in China[J].Railway Engineering,1980(10):6-8.(in Chinese))
[4]松本嘉司,峰本守,横田高良,等.关于修订《新奥法量测指南(草案)》(上)[J].铁道建筑,1984(5):36-38.(SONGMU Jiasi,FENG Benshou,HENGTIAN Gaoliang,etal.Revision of"NATM Monitor Guide(Draft)"(Volume1)[J].Railway Engineering,1984(5):36-38.(in Chinese))
[5]邵根大.国际隧道围绕新奥法的激烈争论给我们的启示[J].铁道建筑,1997(10):2-5.(SHAO Gengda.WhatWe Can Learn From The Fireworks of International TunnelAbout NATM[J].Railway Engineering,1997(10):2-5.(in Chinese))
[6]王彬.对《新奥法是否存在?——新奥法的错误原理》一文的评论[J].现代隧道技术,1995(5):22-24.(WANGBin.Is There New Austrian Tunnelling Method-WrongPrinciples of New Austrian Tunnelling Method[J].Modern Tunnelling Technology,1995(5):22-24.(in Chinese))
[7]朱汉华,王迎超,尚岳全.隧道围岩强预支护原理[J].公路交通科技:应用技术版,2007(7):143-146.(ZHUHanhua,WANG Yingchao,SHANG Yuequan.Principal ofthe tunnel surrounding rock enhanced pre-support[J].Journal of Highway and Transportation Research andDevelopment:Applied Technology Edition,2007(7):143-146.(in Chinese))
[8]姚振凯,黄运平,彭立敏.公路连拱隧道工程工程技术[M].北京:人民交通出版社,2006,(YAO Zhenkai,HUANG Yunping,PENG Limin.Engineering of highwayduel-linked arch tunnel engineering[M].Beijing:ChinaCommunications Press,2006.(in Chinese))
[9]夏才初,刘金磊.相思岭连拱隧道中墙应力研究[J].岩石力学与工程学报,2000 19(S):1115-1119.(XIACaichu,LIU Jinlei.Study on the middle wall stress ofXiangsilin doubled arch tunnel[J].Chinese Journal ofRock Mechanics and Engineering,2000,19(S):1115-1119.(in Chinese))
[10]石宗峰.龙潭隧道右线出洞口开挖与支护数值模拟[J].土工基础,2005,19(4):47-50.(SHI Zongfeng.Numerical simulation of excavation and support of theoutlet of longtan tunnel right line[J].Soil Engineeringand Foundation,2005,19(4):47-50.(in Chinese))
[11]吴从师,邓寄生,叶勇,等.低扁平率大跨度连拱隧道施工初期支护稳定性分析[J].长沙理工大学学报:自然科学版,2008,5(2):38-42.(WU Congshi,DENGJisheng,YE Yong,et al.Stability analysis of shotconcrete lining of mutli-arch tunnel with large span andflat section[J].Journal of Changsha University ofScience&Technology:Natural Science,2008,5(2):38-42.(in Chinese))
[12]余明辉.大跨度连拱隧道施工过程动态分析及地震荷载响应研究[D].北京:中国矿业大学,2009.(YUMinghui.Dynamic analysis on construction process oflarge-span duel-linked arch tunnel?and study onseismic load response[D].Beijing:China University ofMining and Technology,2009.(in Chinese))
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