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基于FDEM的戒台寺古滑体开裂破坏过程数值模拟
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  • 英文篇名:Numerical modeling of cracking for the Jietai temple ancient landslide with the combined finite-discrete element method
  • 作者:陶志刚 ; 张海江 ; 尹利洁 ; 韩文帅 ; 陈伊凡
  • 英文作者:TAO Zhigang;ZHANG Haijiang;YIN Lijie;HAN Wenshuai;CHEN Yifan;State Key Laboratory for Geomechanics and Deep Underground Engineering;School of Mechanics and Civil Engineering,China University of Mining and Technology;School of Civil Engineering,Shaoxing University;Centre of Rock Mechanics and Geological Disaster,Shaoxing University;
  • 关键词:戒台寺 ; FDEM ; 开裂破坏 ; 滑坡模拟 ; 深部力学监测
  • 英文关键词:Jietaisi;;FDEM;;crack to failure;;landslide simulation;;deep mechanics monitoring
  • 中文刊名:水文地质工程地质
  • 英文刊名:Hydrogeology & Engineering Geology
  • 机构:深部岩土力学与地下工程国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;绍兴文理学院土木工程学院;绍兴文理学院岩石力学与地质灾害实验中心;
  • 出版日期:2017-05-15
  • 出版单位:水文地质工程地质
  • 年:2017
  • 期:03
  • 基金:国家自然科学基金项目(41502323);; 浙江省山体地质灾害防治协同创新中心开放基金项目(PCMGH-2016-z-02)
  • 语种:中文;
  • 页:111-118
  • 页数:8
  • CN:11-2202/P
  • ISSN:1000-3665
  • 分类号:P642.22
摘要
戒台寺古滑坡体受多期构造运动控制,边坡岩体中裂缝发育,结构破碎,风化卸荷引起局部滑移严重。2005年,对古滑体Ⅰ级和Ⅱ级平台进行了综合治理,但2013年后期,戒台寺大雄宝殿后墙和后花园地面又发育多组裂缝,且在Ⅲ级平台坡脚处发现大量新断口崩塌坡积物,古滑体有复活征兆。为探索戒台寺古滑坡体从二次稳定到开裂破坏的变形机制和破坏特征,文章首先采用杂交有限元-离散元法(FDEM)建立戒台寺古滑坡体数值模型;然后,将模拟计算结果与现场GPS地表位移监测曲线和破坏特征进行对比分析,结果显示FDEM数值模型较好地再现了戒台寺古滑坡体局部开裂、扩展、贯通、脱离、滑移、碰撞和堆积全过程;最后,判断出戒台寺古滑坡体的危险区域,为古滑坡体深部力学监测点设置提供科学依据。
        The Jietai Temple ancient landslide body is located in the Ma'an Mountain area in the Mentougou district of Beijing. Slope rock mass fractures and broken structures developed because of the multiple tectonic movements in history and the weathered unloading,causing a severe localized slip. In 2005,comprehensive managements,including retaining anchor,flood control and grouting were performed on the Class-Ⅰ and Class-Ⅱ platform of the ancient landslide body. However,late in 2013,a multi-component fracture developed on the floor and back wall of the main hall of the temple,as well as in the rear garden,and collapse of the slope sediments appeared in Class-Ⅲ platform at the foot of the slope,which could be the resurrection sign of this ancient landslide. To explore the ancient landslide stability and protect the temple from the secondary damage,the mechanisms and failure characteristics of landslide deformation were studied. With the hybrid Finite Element-Discrete Element Method( FDEM),a numerical model for the ancient temple landslide was set up,and the simulation results with the live GPS monitoring surface displacement curves and the failure characteristics were analyzed. The FDEM numerical model can reproduce the whole process of the ancientlandslide partial cracking,expansion,cut-through,separating,slipping( or rolling),collision and stacking.Finally,according to the results,the danger zone of the temple ancient landslide body was determined,and they provide scientific basis for field slope monitoring points design.
引文
[1]马洪生,庄卫林,刘阳,等.顺层岩质边坡静力开挖物理模拟试验研究[J].水文地质工程地质,2016,43(3):37-43.[MA H S,ZHUANG W L,LIU Y,et al.Physical excavation test research on a bedding rock slope[J].Hydrogeology&Engineering Geology,2016,43(3):37-43.(in Chinese)]
    [2]User manual of PFC2Dcode[R].Minneapolis:Itasca Consulting Group Ltd,2000.
    [3]User manual of PFC3Dcode[R].Minneapolis:Itasca Consulting Group Ltd,2000.
    [4]王媛.单裂隙面渗流与应力的耦合特性[J].岩石力学与工程学报,2002,21(1):83-87.[WANG Y.Coupling characteristic of stress and fluid flow within a single fracture[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(1):83-87.(in Chinese)]
    [5]Stead D,Eberhardt E,Coggan J S.Developments in the characterization of complex rock slope deformation and failure using numerical modeling techniques[J].Engineering Geology,2006,83(1/3):217-235.
    [6]Jing L.A review of techniques,advances and outstanding issues in numerical modeling for rock mechanics and rock engineering[J].International Journal of Rock Mechanics and Mining Sciences,2003,40(3):283-353.
    [7]He M C,Feng J L,Sun X M.Stability evaluation and optimal excavated design of rock slope at Antaibao open pit coal mine in China[J].International Journal of Rock mechanics and Mining Sciences,2008,45(3):289-302.
    [8]Lisjak A,Grasselli G.A review of discrete modeling techniques for fracturing processes in discontinuous rock masses[J].International Journal of Rock Mechanics and Geotechnical Engineering,2014,6(4):301-314.
    [9]Stead D,Coggan J S,Eberhardt E.Realistic simulation of rock slope failure mechanisms:the need to incorporate principles of fracture mechanics[J].International Journal of Rock Mechanics and Mining Sciences,2004,41(3):6-12.
    [10]严成增,郑宏,孙冠华,等.模拟水压致裂的二维FDEM-flow方法[J].岩石力学与工程学报,2015,34(1):67-75.[YAN C Z,ZHENG H,SUN G H,et al.A 2D FDEM-flow method for simulating hydraulic fracturing[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(1):67-75.(in Chinese)]
    [11]Mahabadi O K,Lisjak A,Munjiza A,et al.Y-Geo:new combined finite-discrete element numerical code for geomechanical applications[J].International Journal of Geomechanics,2012,12(6):676-688.
    [12]Elmo D,Stead D,Elberhartd E,et al.Applications of Finite/Discrete Element Modeling to Rock Engineering Problems[J].International Journal of Geomechanics,2012,13(5):565-580.
    [13]Munjiza A,Owen D R J,Bicanic N.A combined finite-discrete element method in transient dynamics of fracturing solids[J].Eng Comput,1995,12(2):145-74.
    [14]Munjiza A.The combined finite-discrete element method[M].New Jersey:John Wiley&Sons,2004:34-39.
    [15]程晓伟,邓安,尚继红,等.北京戒台寺滑坡治理工程动态监测[J].水文地质工程地质,2009,36(3):123-127.[CHENG X W,DENG A,SHANG J H,et al.Dynamic monitoring of the control project of the Jietai Temple landslide in Beijing[J].Hydrogeology&Engineering Geology,2009,36(3):123-127.(in Chinese)]

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