考虑开挖面空间效应的围岩虚拟支护力分析
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- 英文论文题名：Analysis of the Fictitious Support Pressure of Rock Mass by Considering the Tunnel Face Effect
- 论文作者：崔岚 ; 郑俊杰 ; 章荣军
- 英文论文作者：CUI Lan ; ZHENG Junjie ; ZHANG Rongjun ; Institute of Geotechnical and Underground Engineering ; Huazhong University of Science and Technology
- 年：2016
- 作者机构：华中科技大学岩土与地下工程研究所;
- 论文关键词：隧道 ; 围岩 ; 支护 ; 虚拟支护力 ; 空间效应
- 英文论文关键词：Tunnel ; Surrounding rock mass ; Support ; Fictitious support pressure ; Tunnel face effect
- 会议召开时间：2016-10-24
- 会议录名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会论文集
- 语种：中文
- 分类号：U455.7
- 学会代码：OGTY
- 会议名称：2016中国隧道与地下工程大会（CTUC）暨中国土木工程学会隧道及地下工程分会第十九届年会
- 会议地点：中国四川成都
- 主办单位：中国土木工程学会隧道及地下工程分会
- 学会名称：中国土木工程学会
- 页数：8
- 文件大小：899k
- 原文格式：O
- 会议级别：全国
摘要
基于围岩与支护相互作用两阶段分析法,针对静水压力下的圆形隧道,提出了一种预测理想弹塑性、应变软化、弹-脆-塑性围岩下虚拟支护力的数值方法。在该方法中,首先给出了隧道纵向变形曲线与围岩特征曲线的求解程序,在此基础上,根据一定工况下围岩应力应变一致性对虚拟支护力进行耦合求解。通过与其他方法的计算结果对比论证了本文方法的优势。探讨了临界塑性软化系数、岩体质量、初始应力、剪胀系数对虚拟支护力与开挖面空间效应的影响规律。参数分析结果表明:许多关于隧道掘进的数值模拟研究或实际工程中,经常基于弹性假定计算应力释放率,相应的支护设计并不安全。
Based on the two-stage analysis of the rock-support interaction,for the circular tunnel excavated in the hydrostatic stress field,a numerical procedure to solve the fictitious support pressure with consideration of the elastic-perfectly-plastic,strain softening,elastic-brittle-plastic rock mass is proposed.In the procedure,the solutions of the longitudinal deformation profile and ground reaction curve are firstly proposed and on this basis,the fictitious support pressure is obtained by the one-to-one correspondence of the stress and strain in the surrounding rock mass.By comparing with the calculation result by other methods,advatanges of the proposed method are shown.The influences of the critical plastic softening parameter,the rock mass quality,the initial stress,and the dilatancy coefficient on the fictitious support pressure and the tunnel face effect are discussed.The result indicates that:the stress relieve factor in most tunnel modelling simulation or practical tunneling engineering is calculated on the elastic assumption,the corresponding support design is unsafe.
Based on the two-stage analysis of the rock-support interaction,for the circular tunnel excavated in the hydrostatic stress field,a numerical procedure to solve the fictitious support pressure with consideration of the elastic-perfectly-plastic,strain softening,elastic-brittle-plastic rock mass is proposed.In the procedure,the solutions of the longitudinal deformation profile and ground reaction curve are firstly proposed and on this basis,the fictitious support pressure is obtained by the one-to-one correspondence of the stress and strain in the surrounding rock mass.By comparing with the calculation result by other methods,advatanges of the proposed method are shown.The influences of the critical plastic softening parameter,the rock mass quality,the initial stress,and the dilatancy coefficient on the fictitious support pressure and the tunnel face effect are discussed.The result indicates that:the stress relieve factor in most tunnel modelling simulation or practical tunneling engineering is calculated on the elastic assumption,the corresponding support design is unsafe.
引文
[1]CARRANZA-TORRES C,FAIRHURST C.Application of the convergence-confinement method of tunnel design to rock masses that satisfy the Hoek-Brown failure criterion[J].Tunnelling and Underground Space Technology,2000,15(2):187-213.
[2]EISENSTEIN Z,BRANCO P.Convergence-confinement method in shallow tunnels[J].Tunnelling and Underground Space Technology,1991,6(3):343-346.
[3]GSCHWANDTNER G G,GALLER R.Input to the application of the convergence confinement method with time-dependent material behaviour of the support[J].Tunnelling and Undergound Space Technology,2012,27:13-22.
[4]ORESTE P P.Analysis of structural interacion in tunnels using the convergence-confinement approach[J].Tunnelling and Underground Space Technology,2003,18:347-363.
[5]ORESTE P P.A procedure for determining the reaction curve of shotcrete lining considering transient conditions[J].Rock Mechanics and Rock Engineering,2003,36(3):209-236.
[6]侯公羽,李晶晶.弹塑性变形条件下围岩-支护相互作用全过程解析[J].岩土力学,2012,33(4):962-970.HOU Gong-yu,LI Jing-jing.Analysis of complete process of interaction of surrounding rock and supportunder elastioplastic deformation condition[J].Rock and Soil Mechanics,2012,33(4):962-970.
[7]CAI Y,ESAKI T,JIANG Y J.An analytical model to predict axial load in grouted rock bolt for soft rock tunnelling[J].Tunnelling and Undergound Space Technology,2004,19:607-618.7
[8]卞跃威,夏才初,肖维民,等.考虑围岩软化特性和应力释放的圆形隧道黏弹塑性解.岩土力学,2013,34(1):212-220.BIAN Yao-wei,XIA Cai-chu,XIAO Wei-min.Visco-elastoplastic solutions for circular tunnel considering stress releaseand softening behaviour of rocks[J].Rock and Soil Mechanics,2013,34(1):212-220.
[9]郭瑞,方勇,何川.隧道开挖过程中应力释放及位移释放的相关关系研究[J].铁道工程学报,2010,9:47-50.GUO Rui,FANG Yong,HE Chuan.Study on the correlation between stress release and displacement release during tunnel excavation[J].Journal of Railway Engineering Society,2010,9:47-50.
[10]CARRANZA-TORRES C,RYSDAHL B,KASIM M.On the elastic analysis of a circular lined tunnel considering the delayed installation of the support[J].International Journal of Rock Mechanics and Mining Sciences,2013,6:57-85.
[11]HOEK E,CARRANZA-TORRES C,CORKUM B.Hoek-Brown failure criterion-2002 edition[C]//Proceedings of the 5th North American Rock Mechanics Symposium andl 7th Tunneling Association of Canada Conference.Toronto,2002:267-273.
[12]CARRANZA-TORRES C,DIEDERICHS M.Mechanical analysis of circular liners with particular reference to composite supports.For example,liners consisting of shotcrete and steel sets[J].Tunnelling and Underground Space Technology,2009,24:506-532.
[13]崔岚,郑俊杰,苗晨曦,董友扣.隧道纵向变形曲线与围岩特征曲线耦合分析[J].岩土工程学报,2014,36(4):708-715.CUI Lan,ZHENG Jun-jie.Coupling analysis of longitudinal deformation profile and ground reaction curve[J].Chinese Journal of Geotechnical Engineering,2014,36(4):708-715.
[14]CUI Lan,ZHENG Jun-jie,ZHANG Rong-jun,Dong You-kou.Elasto-plastic analysis of a circular opening in rock mass with confining stress-dependent strain-softening behaviour[J].Tunnelling and Underground Space Technology,2015,50:94-108.
[15]VLACHOPOULOS N,DIEDERICHS M S.Improved longitudinal displacement profilesfor convergence confinement analysis of deep tunnels[J].Rock Mechanics and Rock Engineering,2009,42:131-146.
[16]ALEJANO L R,RODRIGUEZ-DONO A,VEIGA M.Plastic radii and longitudinal deformation profiles of tunnels exavated in strain-softening rock masses[J].Tunnelling and Underground Space Technology,2012,30:169-182.16
[17]HOEK E,BROWN E T.Practical Estimates of Rock Mass Strength[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(8):1165-1186.
[2]EISENSTEIN Z,BRANCO P.Convergence-confinement method in shallow tunnels[J].Tunnelling and Underground Space Technology,1991,6(3):343-346.
[3]GSCHWANDTNER G G,GALLER R.Input to the application of the convergence confinement method with time-dependent material behaviour of the support[J].Tunnelling and Undergound Space Technology,2012,27:13-22.
[4]ORESTE P P.Analysis of structural interacion in tunnels using the convergence-confinement approach[J].Tunnelling and Underground Space Technology,2003,18:347-363.
[5]ORESTE P P.A procedure for determining the reaction curve of shotcrete lining considering transient conditions[J].Rock Mechanics and Rock Engineering,2003,36(3):209-236.
[6]侯公羽,李晶晶.弹塑性变形条件下围岩-支护相互作用全过程解析[J].岩土力学,2012,33(4):962-970.HOU Gong-yu,LI Jing-jing.Analysis of complete process of interaction of surrounding rock and supportunder elastioplastic deformation condition[J].Rock and Soil Mechanics,2012,33(4):962-970.
[7]CAI Y,ESAKI T,JIANG Y J.An analytical model to predict axial load in grouted rock bolt for soft rock tunnelling[J].Tunnelling and Undergound Space Technology,2004,19:607-618.7
[8]卞跃威,夏才初,肖维民,等.考虑围岩软化特性和应力释放的圆形隧道黏弹塑性解.岩土力学,2013,34(1):212-220.BIAN Yao-wei,XIA Cai-chu,XIAO Wei-min.Visco-elastoplastic solutions for circular tunnel considering stress releaseand softening behaviour of rocks[J].Rock and Soil Mechanics,2013,34(1):212-220.
[9]郭瑞,方勇,何川.隧道开挖过程中应力释放及位移释放的相关关系研究[J].铁道工程学报,2010,9:47-50.GUO Rui,FANG Yong,HE Chuan.Study on the correlation between stress release and displacement release during tunnel excavation[J].Journal of Railway Engineering Society,2010,9:47-50.
[10]CARRANZA-TORRES C,RYSDAHL B,KASIM M.On the elastic analysis of a circular lined tunnel considering the delayed installation of the support[J].International Journal of Rock Mechanics and Mining Sciences,2013,6:57-85.
[11]HOEK E,CARRANZA-TORRES C,CORKUM B.Hoek-Brown failure criterion-2002 edition[C]//Proceedings of the 5th North American Rock Mechanics Symposium andl 7th Tunneling Association of Canada Conference.Toronto,2002:267-273.
[12]CARRANZA-TORRES C,DIEDERICHS M.Mechanical analysis of circular liners with particular reference to composite supports.For example,liners consisting of shotcrete and steel sets[J].Tunnelling and Underground Space Technology,2009,24:506-532.
[13]崔岚,郑俊杰,苗晨曦,董友扣.隧道纵向变形曲线与围岩特征曲线耦合分析[J].岩土工程学报,2014,36(4):708-715.CUI Lan,ZHENG Jun-jie.Coupling analysis of longitudinal deformation profile and ground reaction curve[J].Chinese Journal of Geotechnical Engineering,2014,36(4):708-715.
[14]CUI Lan,ZHENG Jun-jie,ZHANG Rong-jun,Dong You-kou.Elasto-plastic analysis of a circular opening in rock mass with confining stress-dependent strain-softening behaviour[J].Tunnelling and Underground Space Technology,2015,50:94-108.
[15]VLACHOPOULOS N,DIEDERICHS M S.Improved longitudinal displacement profilesfor convergence confinement analysis of deep tunnels[J].Rock Mechanics and Rock Engineering,2009,42:131-146.
[16]ALEJANO L R,RODRIGUEZ-DONO A,VEIGA M.Plastic radii and longitudinal deformation profiles of tunnels exavated in strain-softening rock masses[J].Tunnelling and Underground Space Technology,2012,30:169-182.16
[17]HOEK E,BROWN E T.Practical Estimates of Rock Mass Strength[J].International Journal of Rock Mechanics and Mining Sciences,1997,34(8):1165-1186.