岩质边坡锚杆支护参数地震敏感性分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
目前已有的锚杆支护抗震设计主要采用拟静力方法,无法考虑锚杆与岩体的相互作用,也不能准确的评价锚杆支护后的边坡动力稳定性,为此,采用强度折减法动力分析法评价锚杆支护岩质边坡动力稳定性,该方法不仅考虑了锚杆与岩体的动力响应,还能得到边坡动力破裂面和锚杆轴力的变化情况,可以用于边坡锚杆抗震支护设计。然后以此为手段进行边坡锚杆支护设计,要求边坡达到容许安全系数即可,通过一个典型锚杆支护边坡实例分析,对锚杆支护参数进行了敏感性研究,研究结果为锚杆支护边坡的抗震设计及优化提供技术支持。
At present,the pseudo-static analysis method has been mostly used in the design of slope supported with anchors,but it cannot consider the anchor-slope interaction under earthquakes and accurately calculate the dynamic stability of the slopes supported with anchors.So,the dynamic finite element strength reduction method is employed to evaluate the dynamic stability of rock slopes supported with anchors.The proposed method can consider the dynamic response of bolts and rock mass,the dynamic rupture surface of slopes and the variation of axial force of bolts.It is used as a method for the design of slopes supported with anchors.The allowable safety factor of the slopes is required.Based on a typical example of bolting slope analysis,the parameters of sensitivity analysis are studied.The results can be the technical support for the design and optimization of slopes supported with anchors under earthquakes.
引文
[1]程良奎.岩土锚固[M].北京:中国建筑工业出版社,2003.(CHENG Liang-kui.Rock anchor[M].Beijing:China Architecture and Building Press,2003.(in Chinese))
    [2]GRASSELLI G.3D behavior of bolted rock joints:experimental and numerical study[J].Int J Rock Mech and Min Sci,2005,42(1):13–24.
    [3]洪海春,徐卫亚.地震作用下岩体锚固性能研究综述与展望[J].金属矿山,2006(3):5–11.(HONG Hai-chun,XU Wei-ya.Review and prospect of anchorage properties of reinforced rockmass under earthquake[J].Metal Mine,2006(3):5–11.(in Chinese))
    [4]STAMATOPOULOSA C A,BASSANOUA M,BRENNANB A J,et al.Mitigation of the seismic motion near the edge of cliff-type topographies[J].Soil Dynamics and Earthquake Engineering,2007(27):1082–1100.
    [5]TANNANTF D D,BRUMMERf R K,YI X.Rock bolt behavior under dynamic loading:field tests and modeling[J].Int J Rock Mech Min Sci&Geomech Abstr,1995,32(6):537–550.
    [6]薛亚东,张世平,康天合.回采巷道锚杆动载响应的数值分析[J].岩石力学与工程学报,2003,22(11):1903–1906.(XUE Ya-dong,ZHANG Shi-ping,KANG Tian-he.Num erical analysis on dynamic response of rock bolts in mining roadways[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1903–1906.(in Chinese))
    [7]董建华,朱彦鹏.框架锚杆支护边坡地震响应分析[J].兰州理工大学学报,2008,34(2):118–124.(DONG Jian-hua,ZHU Yan-peng.Analysis of response of slope supported with framed anchor to earthquake[J].Journal of Lanzhou University of Technolog,2008,34(2):118–124.(in Chinese))
    [8]高峰,石玉成,韦凯.锚杆加固对石窟地震反应的影响[J].世界地震工程,2006,22(2):84–88.(GAO Feng,SHI Yu-cheng,WEI Kai.The influence of anchor bolt supports on seismic responses of strengthening grottoes[J].World Earthquake Engineering,2006,22(2):84–88.(in Chinese))
    [9]DL5073—2000水工建筑物抗震设计规范[S].北京:中国电力出版社,2001.(DL5073—2000 Anti-seismic design code for hydraulic building[S].Beijing:China Electric Power Press,2001.(in Chinese))
    [10]郑颖人,赵尚毅,张鲁渝.用有限元强度折减法进行边坡稳定分析[J].中国工程科学2002,4(10):57–62.(ZHENG Ying-ren,ZHAO Shang-yi,ZHANG Lu-yu.Slope stability analysis by strength reduction FEM[J].Engineering Science,2002,4(10):57–62.(in Chinese))
    [11]赵尚毅,郑颖人,张玉芳.极限分析有限元法讲座——Ⅱ有限元强度折减法中边坡失稳的判据探讨[J].岩土力学,2005,26(2):332–336.(ZHAO Shang-yi,ZHENG Ying-ren,ZHANG Yu-fang.Study on slope failure criterion in strength reduction finite element method[J].Rock and Soil Mechanics,2005,26(2):332–336.(in Chinese))
    [12]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,26(12):2385–2394.(LI Hai-bo,XIAO Ke-qiang,LIU Ya-qun.Factor of safety analysis of bedding rock slope under seismic load[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(12):2385–2394.(in Chinese))
    [13]戴妙林,李同春.基于降强法数值计算的复杂岩质边坡动力稳定性安全评价[J].岩石力学与工程学报,2007,26(增刊1):2749–2754.(DAI Miao-lin,LI Tong-chun.Analysis of dynamic stability safety evaluation for complex rock slopes by rtrength reduction numerical method[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(S1):2749–2754.(in Chinese))
    [14]郑颖人,叶海林,黄润秋.地震边坡破坏机制及其破裂面的分析探讨[J].岩石力学与工程学报,2009,28(8):1714–1723.(ZHENG Ying-ren,YE Hai-lin,HUANG Run-qiu.Discussion and analysis on falure mechanism and fracture surface of slope under earthquake effect[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(8):1714–1723.(in Chinese))
    [15]郑颖人,叶海林,黄润秋,等.地震边坡稳定性分析探讨[J].地震工程与工程振动,2010,30(2):66–73.(ZHENG Ying-ren,YE Hai-lin,HUANG Run-qiu,et al.Study on the stability analysis of earthquake slope[J]Journal of Earthquake Engineering and Engineering Vibration,2010,30(2):66–73.(in Chinese))
    [16]胡聿贤.地震工程学[M].北京:地震出版社,1988.(HU Yu-xian.Seismic engineering[M].Beijing:Earthquake Press,1988.(in Chinese))
    [17]Itasca Consulting Group,Inc.FLAC.(Fast Lagrangian Analysis 3D)User's Manual,Version3.0[R].USA:Itasca Consulting Group,Inc,2003.

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