砂卵石地层盾构隧道的荷载特征分析
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- 英文论文题名：Load Analysis of Shield Tunnel Lining in Sandy Cobble Stratum
- 论文作者：王俊 ; 何川 ; 胡瑞青 ; 王闯
- 英文论文作者：WANG Jun ; HE Chuan ; HU Ruiqing ; WANG Chuang ; Key Laboratory of Transportation Tunnel Engineering ; Ministry of Education ; Southwest Jiaotong University
- 年：2016
- 作者机构：西南交通大学交通隧道工程教育部重点实验室;
- 论文关键词：盾构隧道 ; 砂卵石地层 ; 土拱 ; 颗粒流 ; 荷载计算
- 英文论文关键词：Shield tunnel ; Sandy cobble ground ; Soil arching ; Particle flow code ; Load analysis
- 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：U455.43
- 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：5
- 文件大小：1597k
- 原文格式：O
- 会议级别：全国
摘要
盾构隧道管片衬砌设计中荷载计算的可靠度影响着管片结构的安全性。成都地铁穿越的地层主体为富水砂卵石地层,该地层颗粒离散性明显,围岩荷载作用和分布复杂,亟需建立适应其地层特性的荷载计算方法。本文以成都地铁2号线东门大桥—牛王庙盾构区间作为依托工程,采用二维颗粒流方法研究了作用在隧道衬砌荷载上的荷载,并与太沙基公式得到的理论界进行了对比。研究结果发现,砂卵石地层中拱效应的存在,导致土体颗粒间发生应力传递,最终滑动板上的土压力为定值,验证了砂卵石地层中太沙基松动土压力理论的适用性。砂卵石地层中衬砌荷载按隧道埋深可以分为三个阶段计算。本研究对砂卵石地层盾构隧道管片结构设计具有参考作用。
It is important to evaluate accurately the load acting on the shield tunnel lining structure,which decides the structure safety directly.The effect and distribution of surrounding rock load is complex in sandy cobble stratum,therefore,an appropriate load calculation needs to be established urgently to facilitate its rational design.Based on Chengdu Metro Line 2,Particle flow code in two dimensions was employed to carry out to study the load acting on shield tunnel lining and it is compared with analytical results calculated by Terzaghi theory.Results show that contact forces above tunnel crown transmit along the soil arch,and the load acting on the trap door is stable,which validate the applicability of Terzaghi theory.The research may serve as guideline for tunnel lining design in practice engineering in sandy cobble ground.
It is important to evaluate accurately the load acting on the shield tunnel lining structure,which decides the structure safety directly.The effect and distribution of surrounding rock load is complex in sandy cobble stratum,therefore,an appropriate load calculation needs to be established urgently to facilitate its rational design.Based on Chengdu Metro Line 2,Particle flow code in two dimensions was employed to carry out to study the load acting on shield tunnel lining and it is compared with analytical results calculated by Terzaghi theory.Results show that contact forces above tunnel crown transmit along the soil arch,and the load acting on the trap door is stable,which validate the applicability of Terzaghi theory.The research may serve as guideline for tunnel lining design in practice engineering in sandy cobble ground.
引文
[1]周小文,濮家骝,包承刚.盾构隧道衬砌土压力确定方法[J].工程力学,1997,(增刊):366-371.ZHOU Xiaowen,PU Jialiu,BAO Chenggang.The determining method to the pressure of shield tunnel,engineering mechanics[J].Engineering Mechanics,1997,(Supp.):366-371.
[2]KOYAMAY,OKANON.,SHIMIZU M.,FUJIKI I.,YONESHIMA K.In-situ Measurement and consideration on shield tunnel in diluvium deposit[C]//Proceedings ofTunnel Engineering.JSCE.1995,Vol.7,pp.385-390.
[3]LEE K M,HOU X Y,GE X W,et al.An Analytical Solution for AJointed Shield-Driven Tunnel Lining[J].International Journal for Numerical and Analytical Methods in Geomechanics,2001,25(4):365-390.
[4]LEE K M,GE X W.The Equivalence of a Jointed Shield-Driven Tunnel Lining to AContinuous Ring Structure[J].Journal of Canadian Geotechnical Engineering,2001,38(1):461-483.
[5]朱合华,崔茂玉,杨金松.盾构衬砌管片的设计模型与荷载分布的研究[J].岩土工程学报,2000,22(2):190-194.ZHU Hehua,CUI Maoyu,YANG Jinsong.Design model for shield lining segments and distribution of load[J].Chinese Journal of Geotechnical Engineering,2000,22(2):190-194.
[6]MashimoH.,Ishimura T.Evaluation ofthe Load on Shield Tunnel Lining in Gravel[J].Tunnelling and Underground Space Technology,2003,18:233-241.
[7]钟小春,朱伟.盾构衬砌管片土压力反分析研究[J].岩土力学,2006,27(10):1743-1748.ZHONG Xiaochun,ZHU Wei.Back analysis of soil pressure acting on shield lining segment[J].Rock and Soil Mechanics,2006,27(10):1743-1748.
[8]周济民,何川,方勇,等.黄土地层地铁盾构隧道受力监测与荷载作用模式的反演分析[J].岩土力学,2011,32(1):165-171.ZHOU Jimin,HE Chuan,FANG Yong,et al.Mechanical property testing and back analysis of load models of metro shield tunnel lining in loess strata[J].Rock and Soil Mechanicals,2011,32(1):165-171.
[9]Terzaghi,K.Theoretical soil mechanics[M].Wiley,New York,1943.
[10]魏龙海.基于颗粒离散元法的卵石层中成都地铁施工力学研究[博士学位论文D].成都:西南交通大学,2009.WEI Longhai.Study on the mechanical behaviour of subway construction in cobble stratum based on granular discrete element method[D].Chengdu:Southwest Jiaotong University,2009.
[11]Itasca Consulting Group.PFC2D(Particle Flow Code in 2 Dimensions),Version 3.1.User's Manual[R].Minneapolis,2004.
[12]ONO.K.,YAMADA.M.Analysis of the Arching Sction in Granular Mass[J].Geotechnique,1993,43(1):105-120.
[13]周小文,濮家骝,包承钢.砂土中隧洞开挖稳定机理及松动土压力研究[J].长江科学院院报,1999,16(4):9-14.ZHOU Xiaowen,PU Jialiu,BAO Chenggang.Study on stability mechanism and relaxed soil pressure in sandy soil during excavation[J].Journal of Yangtze River Scientific Research Institute,1999,16(4):9-14.
[14]钟小春.盾构隧道管片土压力的研究[博士学位论文D].南京:河海大学,2005.ZHONG Xiaochun.Research on earth pressure for shield tunnel lining[D].Nanjing:Hohai University,2005.
[15]朱伟,钟小春,加瑞.盾构隧道垂直土压力松动效应的颗粒流模拟[J].岩土工程学报,2008,30(5):750-754.ZHU Wei,ZHONG Xiaochun,JIA Rui.Simulation on relaxation effect of vertical earth pressure for shield tunnels by particle flow code[J].Chinese Journal of Geotechnical Engineering,2008,30(5):750-754.
[2]KOYAMAY,OKANON.,SHIMIZU M.,FUJIKI I.,YONESHIMA K.In-situ Measurement and consideration on shield tunnel in diluvium deposit[C]//Proceedings ofTunnel Engineering.JSCE.1995,Vol.7,pp.385-390.
[3]LEE K M,HOU X Y,GE X W,et al.An Analytical Solution for AJointed Shield-Driven Tunnel Lining[J].International Journal for Numerical and Analytical Methods in Geomechanics,2001,25(4):365-390.
[4]LEE K M,GE X W.The Equivalence of a Jointed Shield-Driven Tunnel Lining to AContinuous Ring Structure[J].Journal of Canadian Geotechnical Engineering,2001,38(1):461-483.
[5]朱合华,崔茂玉,杨金松.盾构衬砌管片的设计模型与荷载分布的研究[J].岩土工程学报,2000,22(2):190-194.ZHU Hehua,CUI Maoyu,YANG Jinsong.Design model for shield lining segments and distribution of load[J].Chinese Journal of Geotechnical Engineering,2000,22(2):190-194.
[6]MashimoH.,Ishimura T.Evaluation ofthe Load on Shield Tunnel Lining in Gravel[J].Tunnelling and Underground Space Technology,2003,18:233-241.
[7]钟小春,朱伟.盾构衬砌管片土压力反分析研究[J].岩土力学,2006,27(10):1743-1748.ZHONG Xiaochun,ZHU Wei.Back analysis of soil pressure acting on shield lining segment[J].Rock and Soil Mechanics,2006,27(10):1743-1748.
[8]周济民,何川,方勇,等.黄土地层地铁盾构隧道受力监测与荷载作用模式的反演分析[J].岩土力学,2011,32(1):165-171.ZHOU Jimin,HE Chuan,FANG Yong,et al.Mechanical property testing and back analysis of load models of metro shield tunnel lining in loess strata[J].Rock and Soil Mechanicals,2011,32(1):165-171.
[9]Terzaghi,K.Theoretical soil mechanics[M].Wiley,New York,1943.
[10]魏龙海.基于颗粒离散元法的卵石层中成都地铁施工力学研究[博士学位论文D].成都:西南交通大学,2009.WEI Longhai.Study on the mechanical behaviour of subway construction in cobble stratum based on granular discrete element method[D].Chengdu:Southwest Jiaotong University,2009.
[11]Itasca Consulting Group.PFC2D(Particle Flow Code in 2 Dimensions),Version 3.1.User's Manual[R].Minneapolis,2004.
[12]ONO.K.,YAMADA.M.Analysis of the Arching Sction in Granular Mass[J].Geotechnique,1993,43(1):105-120.
[13]周小文,濮家骝,包承钢.砂土中隧洞开挖稳定机理及松动土压力研究[J].长江科学院院报,1999,16(4):9-14.ZHOU Xiaowen,PU Jialiu,BAO Chenggang.Study on stability mechanism and relaxed soil pressure in sandy soil during excavation[J].Journal of Yangtze River Scientific Research Institute,1999,16(4):9-14.
[14]钟小春.盾构隧道管片土压力的研究[博士学位论文D].南京:河海大学,2005.ZHONG Xiaochun.Research on earth pressure for shield tunnel lining[D].Nanjing:Hohai University,2005.
[15]朱伟,钟小春,加瑞.盾构隧道垂直土压力松动效应的颗粒流模拟[J].岩土工程学报,2008,30(5):750-754.ZHU Wei,ZHONG Xiaochun,JIA Rui.Simulation on relaxation effect of vertical earth pressure for shield tunnels by particle flow code[J].Chinese Journal of Geotechnical Engineering,2008,30(5):750-754.