基于改进动力强度折减法的隧道地震破坏机理探讨
|
摘要
文章分析了影响隧道在地震作用下破坏的因素,研究了不同围岩级别、不同跨度、不同结构形式和不同埋深等条件下隧道结构在地震中的破坏机理,分别针对各个影响因素进行了对比分析;通过静动力转换边界将静力场施加到动力计算中作为初始应力条件,对动力强度折减法进行了改进,通过计算应用证明了其可行性;使用改进的动力强度折减法对深、浅埋隧道在地震作用下的破坏机理进行了计算分析。结果表明,不同埋深隧道在地震中的破坏过程不同,浅埋隧道是从隧道上方两侧开始破坏的,逐渐形成贯通到地面的破裂面;深埋隧道最先在4个边角的应力集中处出现塑性应变,顶部和底部的塑性应变较小,随后从两侧开始逐渐形成贯通的塑性应变区,直至破坏。
To explore the failure mechanism of tunnel structures in earthquakes, a static field was imposed to dynamic calculation by shifting the boundary between static and dynamic, which was taken as an initial stress condition for the improvement of the dynamic strength reduction method, the feasibility of which was proven by a computing application. The improved dynamic strength reduction method is used to calculate and analyze the failure mechanism of deep and shallow buried tunnels under seismic action, and the results show that failure processes are different for tunnels with different depths. For the shallow-buried tunnel, failure begins at the two sides above the tunnel and gradually forms a fracture plane cutting through the ground; for the deep tunnel, the plastic strain first occurs at four stress-concentrated corners with a smaller plastic strain on the crown and floor,and then a continuous plastic strain zone is formed gradually from the two sides until failure finally occurs. In light of seismic action, this paper analyzes the factors affecting tunnel failure, studies the failure mechanism of tunnel structures of different surrounding rock grades, spans, structure types, and buried depths, and finally carries on a comparative analysis for each influence factor.
To explore the failure mechanism of tunnel structures in earthquakes, a static field was imposed to dynamic calculation by shifting the boundary between static and dynamic, which was taken as an initial stress condition for the improvement of the dynamic strength reduction method, the feasibility of which was proven by a computing application. The improved dynamic strength reduction method is used to calculate and analyze the failure mechanism of deep and shallow buried tunnels under seismic action, and the results show that failure processes are different for tunnels with different depths. For the shallow-buried tunnel, failure begins at the two sides above the tunnel and gradually forms a fracture plane cutting through the ground; for the deep tunnel, the plastic strain first occurs at four stress-concentrated corners with a smaller plastic strain on the crown and floor,and then a continuous plastic strain zone is formed gradually from the two sides until failure finally occurs. In light of seismic action, this paper analyzes the factors affecting tunnel failure, studies the failure mechanism of tunnel structures of different surrounding rock grades, spans, structure types, and buried depths, and finally carries on a comparative analysis for each influence factor.
引文
[1]于学馥,郑颖人,刘怀恒,等.地下工程围岩稳定分析[M].北京:煤炭工业出版社,1983Yu Xuefu,Zheng Yingren,Liu Huaiheng,et al.Analysis of Rock Stability in Underground Works[M].Beijing:China Coal Industry Publishing House,1983
[2]郑颖人,徐浩,王成,等.隧洞破坏机理及深浅埋分界标准[J].浙江大学学报(工学版),2010,44(10):1851-1856Zheng Yingren,Xu Hao,Wang Cheng,Xiao Qiang.Failure Mechanism of Tunnel and Dividing Line Standard between Shallow and Deep Bury[J].Journal of Zhejiang University(Engineering Science),2008,29(1):101-105
[3]Griffith S.D.V,Lane P.A.Slope Stability Analysis by Finite Elements[J].Geotechnique,1999,49(3):387-403
[4]陈卫兵,郑颖人,冯夏庭.考虑岩土体流变特性的强度折减法研究[J].岩土力学,2008,29(1):101-105Chen Weibing,Zheng Yingren,Feng Xiatingi.Study on Strength Reduction Technique Considering Rheological Property of Rock and Soil Medium[J].Rock and Soil Mechanics,2008,29(1):101-105
[5]邱陈瑜,郑颖人,宋雅坤.采用ANSYS软件讨论无衬砌黄土隧洞安全系数[J].地下空间与工程学报,2009,5(2):291-296Qiu Chenyu,Zheng Yingren,Song Yakun.Exploring the Safety Factors of Unlined Loess Tunnel by ANSYS[J].Chinese Journal of Underground Space and Engineering,2009,5(2):291-296
[6]张红,郑颖人,杨臻,等.黄土隧洞安全系数初探[J].地下空间与工程学报,2009,5(2):297-306Zhang Hong,Zheng Yingren,Yang Zhen,et al.Exploration of Safety Factors of the Loess Tunnel[J].Chinese Journal of Underground Space and Engineering,2009,5(2):297-306
[7]江权,冯夏庭,向天兵.基于强度折减原理的地下洞室群整体安全系数计算方法探讨[J].岩土力学,2009,30(8):2483-2488Jiang Quan,Feng Xiating,Xiang Tianbing.Discussion on Method for Calculating General Safety Factor of Underground Caverns Based on Strength Reduction Theory[J].Rock and Soil Mechanics,2009,30(8):2483-2488
[8]李树忱,李术才,徐帮树.隧道围岩稳定分析的最小安全系数法[J].岩土力学,2007,28(3):549-554Li Shuchen,Li Shucai,Xu Bangshu.Minimum Safety Factor Method for Stability Analysis of Surrounding Rock Mass of Tunnel[J].Rock and Soil Mechanics,2007,28(3):549-554
[9]Yang X.L,Huang F.Stability Analysis of Shallow Tunnels Subjected to Seepage with Strength Reduction Theory[J].Journal of Central South University of Technology,2009,16(6):1001-1005
[10]Sterpil D,Cividini A.A Physical and Numerical Investigation on the Stability of Shallow Tunnels in Strain Softening Media[J].Rock Mechanics and Rock Engineering,2004,37(4):277-298
[11]Zaetskiil Y.K,Karabaevl M.I,Khachaturyan N.S.Construction Monitoring of a Shallow Tunnel in the Lefortovo District of Moscow[J].Soil Mechanics and Foundation Engineering,2004,41(2):45-51
[12]程选生,郑颖人.地震作用下无衬砌黄土隧道围岩结构安全系数的计算探讨[J].岩土力学,2011,32(3):769-774Cheng Xuansheng,Zheng Yingren.Calculation Discussion About Safety Factor of Unlined Loess Tunnel Wall Rock Structure under Earthquake[J].Rock and Soil Mechanics,2011,32(3):769-774
[13]程选生,郑颖人,田瑞瑞.隧道围岩结构地震动稳定性分析的动力有限元强度折减法[J].岩土力学,2011,32(4):1241-1248Cheng Xuansheng,Zheng Yingren,Tian Ruirui.Dynamic Finite Element Etrength Reduction Method of Earthquake Stability Analysis of Surrounding Rock of Tunnel[J].Rock and Soil Mechanics,2011,32(4):1241-1248
[14]赵尚毅,郑颖人,时卫民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346Zhao Shangyi,Zheng Yingre,Shi Weimin,Wang Jinglin.Analysis on Safety Factor of Slope by Strength Reduction FEM[J].Chinese Journal of Geotechnical Engineering,2002,24(3):343-346
[15]郑颖人,叶海林,黄润秋,等.边坡地震稳定性分析探讨[J].地震工程与工程振动,2010,30(2):66-73Zheng Yingren,Ye Hailin,Huang Runqiu,Li Anhong,Xu Jiangbo.Study on the Seismic Stability Analysis of a Slope[J]Journal of Earthquake Engineering and Engineering Vibration,2010,30(2):66-73
[16]王勖成,邵敏.有限单元法基本原理和数值方法[M].北京:清华大学出版社(第二版),2000Wang Xucheng,Shao Min.Basic Principle and Numerical Method of FEM[M].Beijing:Tsinghua University Press(Second Edition),2000
[17]孙常新,韩立新,高峰.隧道开挖中的应力旋转和裂隙塑性变形问题研究[J].现代隧道技术,2011,48(1):6-11Sun Changxin,Han Lixin,Gao Feng.Research on Stress Rotation and Plastic Deformation of Cracks in Tunnel during Excavation[J].Modern Tunnelling Technology,2011,48(1):6-11
[18]高峰,赵冯兵.地下结构静--动力分析中的人工边界转换方法研究[J].振动与冲击,2011,30(11):165-170Gao Feng,Zhao Fengbing.Study on Transformation Method for Artificial Boundaries in Static-Dynamic Analysis of Underground Structure[J].Journal of Vibration and Shock,2011,30(11):165-170
[19]孙常新,刘桂香.改进振动法在地下工程动力时程计算中的应用[J].现代隧道技术,2013,50(3):66-71Sun Changxin,Liu Guixiang.Application of the Improved Vibration Methode in Dynamic Time-History Calculations for Underground Works[J].Modern Tunnelling Technology,2013,50(3):66-71
[2]郑颖人,徐浩,王成,等.隧洞破坏机理及深浅埋分界标准[J].浙江大学学报(工学版),2010,44(10):1851-1856Zheng Yingren,Xu Hao,Wang Cheng,Xiao Qiang.Failure Mechanism of Tunnel and Dividing Line Standard between Shallow and Deep Bury[J].Journal of Zhejiang University(Engineering Science),2008,29(1):101-105
[3]Griffith S.D.V,Lane P.A.Slope Stability Analysis by Finite Elements[J].Geotechnique,1999,49(3):387-403
[4]陈卫兵,郑颖人,冯夏庭.考虑岩土体流变特性的强度折减法研究[J].岩土力学,2008,29(1):101-105Chen Weibing,Zheng Yingren,Feng Xiatingi.Study on Strength Reduction Technique Considering Rheological Property of Rock and Soil Medium[J].Rock and Soil Mechanics,2008,29(1):101-105
[5]邱陈瑜,郑颖人,宋雅坤.采用ANSYS软件讨论无衬砌黄土隧洞安全系数[J].地下空间与工程学报,2009,5(2):291-296Qiu Chenyu,Zheng Yingren,Song Yakun.Exploring the Safety Factors of Unlined Loess Tunnel by ANSYS[J].Chinese Journal of Underground Space and Engineering,2009,5(2):291-296
[6]张红,郑颖人,杨臻,等.黄土隧洞安全系数初探[J].地下空间与工程学报,2009,5(2):297-306Zhang Hong,Zheng Yingren,Yang Zhen,et al.Exploration of Safety Factors of the Loess Tunnel[J].Chinese Journal of Underground Space and Engineering,2009,5(2):297-306
[7]江权,冯夏庭,向天兵.基于强度折减原理的地下洞室群整体安全系数计算方法探讨[J].岩土力学,2009,30(8):2483-2488Jiang Quan,Feng Xiating,Xiang Tianbing.Discussion on Method for Calculating General Safety Factor of Underground Caverns Based on Strength Reduction Theory[J].Rock and Soil Mechanics,2009,30(8):2483-2488
[8]李树忱,李术才,徐帮树.隧道围岩稳定分析的最小安全系数法[J].岩土力学,2007,28(3):549-554Li Shuchen,Li Shucai,Xu Bangshu.Minimum Safety Factor Method for Stability Analysis of Surrounding Rock Mass of Tunnel[J].Rock and Soil Mechanics,2007,28(3):549-554
[9]Yang X.L,Huang F.Stability Analysis of Shallow Tunnels Subjected to Seepage with Strength Reduction Theory[J].Journal of Central South University of Technology,2009,16(6):1001-1005
[10]Sterpil D,Cividini A.A Physical and Numerical Investigation on the Stability of Shallow Tunnels in Strain Softening Media[J].Rock Mechanics and Rock Engineering,2004,37(4):277-298
[11]Zaetskiil Y.K,Karabaevl M.I,Khachaturyan N.S.Construction Monitoring of a Shallow Tunnel in the Lefortovo District of Moscow[J].Soil Mechanics and Foundation Engineering,2004,41(2):45-51
[12]程选生,郑颖人.地震作用下无衬砌黄土隧道围岩结构安全系数的计算探讨[J].岩土力学,2011,32(3):769-774Cheng Xuansheng,Zheng Yingren.Calculation Discussion About Safety Factor of Unlined Loess Tunnel Wall Rock Structure under Earthquake[J].Rock and Soil Mechanics,2011,32(3):769-774
[13]程选生,郑颖人,田瑞瑞.隧道围岩结构地震动稳定性分析的动力有限元强度折减法[J].岩土力学,2011,32(4):1241-1248Cheng Xuansheng,Zheng Yingren,Tian Ruirui.Dynamic Finite Element Etrength Reduction Method of Earthquake Stability Analysis of Surrounding Rock of Tunnel[J].Rock and Soil Mechanics,2011,32(4):1241-1248
[14]赵尚毅,郑颖人,时卫民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346Zhao Shangyi,Zheng Yingre,Shi Weimin,Wang Jinglin.Analysis on Safety Factor of Slope by Strength Reduction FEM[J].Chinese Journal of Geotechnical Engineering,2002,24(3):343-346
[15]郑颖人,叶海林,黄润秋,等.边坡地震稳定性分析探讨[J].地震工程与工程振动,2010,30(2):66-73Zheng Yingren,Ye Hailin,Huang Runqiu,Li Anhong,Xu Jiangbo.Study on the Seismic Stability Analysis of a Slope[J]Journal of Earthquake Engineering and Engineering Vibration,2010,30(2):66-73
[16]王勖成,邵敏.有限单元法基本原理和数值方法[M].北京:清华大学出版社(第二版),2000Wang Xucheng,Shao Min.Basic Principle and Numerical Method of FEM[M].Beijing:Tsinghua University Press(Second Edition),2000
[17]孙常新,韩立新,高峰.隧道开挖中的应力旋转和裂隙塑性变形问题研究[J].现代隧道技术,2011,48(1):6-11Sun Changxin,Han Lixin,Gao Feng.Research on Stress Rotation and Plastic Deformation of Cracks in Tunnel during Excavation[J].Modern Tunnelling Technology,2011,48(1):6-11
[18]高峰,赵冯兵.地下结构静--动力分析中的人工边界转换方法研究[J].振动与冲击,2011,30(11):165-170Gao Feng,Zhao Fengbing.Study on Transformation Method for Artificial Boundaries in Static-Dynamic Analysis of Underground Structure[J].Journal of Vibration and Shock,2011,30(11):165-170
[19]孙常新,刘桂香.改进振动法在地下工程动力时程计算中的应用[J].现代隧道技术,2013,50(3):66-71Sun Changxin,Liu Guixiang.Application of the Improved Vibration Methode in Dynamic Time-History Calculations for Underground Works[J].Modern Tunnelling Technology,2013,50(3):66-71
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心