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| A THREE-DIMENSIONAL MODEL WITH SPRING-DEFORMABLE-BLOCKS FOR POST-FAILURE MOTION OF LANDSLIDES |
| YANG Haiqing1，2，LAN Yifan1，2，ZENG Youyuan1，2，ZHOU Xiaoping1，2 |
| (1. School of Civil Engineering，Chongqing University，Chongqing 400030，China；2. Key Laboratory of New Technology for Construction of Cities in Mountain Area，Ministry of Education，Chongqing University，Chongqing 400030，China) |
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Abstract Assessment of landslide hazards often requires good knowledge of the moving characteristics of landslides. However，the current analysis is mainly based on qualitative models，which are not suitable for quantitative analysis. To overcome this shortcoming，a three-dimensional model of spring-deformable-blocks was formulated to produce the motion of landslides. The motion of landslides was assumed continuous and variable，and the sliding body was divided into a number of deformable columns. With the force acting on the side face of columns，the deformation of the column was obtained according to the relationship of force-deformation of sliding body. The formulas for the acceleration，velocity and displacement of sliding body were established considering the accumulation and the release of the deformation energy. The proposed model was implemented in a program based on Visual Basic for the visualization of the motion of landslides. The program was applied to analyze the sliding time，the maximum velocity and the displacement of the sliding body of Jiweishan landslide in Wulong， Chongqing. The results from the simulation was found to be in good agreement with the existing numerical results.
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Received: 03 May 2014
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| [1] 潘家铮. 建筑物的抗滑稳定和滑坡分析[M]. 北京：水利出版社，1980：120–132.(PAN Jiazheng. Analysis of building?s stability against sliding and landslide[M]. Beijing：China Water Conservancy Press，1980：120–132.(in Chinese))
[2] 王家鼎，黄海国，阮爱国. 滑坡体滑动轨迹的研究[J]. 中国地质灾害与防治学报，1991，2(2)：1–10.(WANG Jiading，HUANG Haiguo，RUAN Aiguo. The study on sliding locus for landslide mass[J]. The Chinese Journal of Geological Hazard and Control，1991，2(2)：1–10.(in Chinese))
[3] 刘忠玉，马崇武，苗天德，等. 高速滑坡远程预测的块体运动模型[J]. 岩石力学与工程学报，2000，19(6)：742–746.(LIU Zhongyu，MA Chongwu，MIAO Tiande，et al. Kinematic block model of long run-out prediction for high-speed landslides[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(6)：742–746.(in Chinese))
[4] 汪 洋，刘 波，汪 为. 滑坡速度计算的改进条分法[J]. 安全与环境工程，2004，11(3)：68–70.(WANG Yang，LIU Bo，WANG Wei. Improved slice method for landslide speed calculation[J]. Safety and Environmental Engineering，2004，11(3)：68–70.(in Chinese))
[5] 程谦恭，彭建兵. 高速岩质滑坡动力学[M]. 成都：西南交通大学出版社，1999：133–138.(CHENG Qiangong，PENG Jianbing. Dynamics for high-speed rocky landslide[M]. Chengdu：Southwest Jiaotong University Press，1999：133–138.(in Chinese))
[6] SCOTT M，OLDRICH H. A model for the analysis of rapid landslide motion across three-dimensional terrain[J]. Canadian Geotechnical Journal，2004，41(6)：1 084–1 097.
[7] OLDRICH H. A model for the run out analysis of rapid flow slides，debris flows and avalanches[J]. Canadian Geotechnical Journal，1995，32(4)：610–623.
[8] 吴 越，刘东升，李明军. 滑体下滑及冲击受灾体过程中的能耗规律模型试验[J]. 岩石力学与工程学报，2011，30(4)：693–702.(WU Yue，LIU Dongsheng，LI Mingjun. Landslide model experiment for energy dissipation law in sliding and impact process[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(4)：693–702.(in Chinese))
[9] 吴 越，刘东升，李硕洋. 基于滑体与受灾体共同作用的冲击能计算模型[J]. 岩石力学与工程学报，2012，31(增1)：2 636–2 643.(WU Yue，LIU Dongsheng，LI Shuoyang. Calculation model of impact energy based on interaction of landslide mass and disaster-affected bodies[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：2 636–2 643.(in Chinese))
[10] 巫锡勇，王效宁. 岩质顺层滑坡运动特征的研究[J]. 西安交通大学学报，1990，(3)：89–98.(WU Xiyong，WANG Xiaoning. Research on the motion characteristics of along-bedding landslip[J]. Journal of Xi?an Jiaotong University，1990，(3)：89–98.(in Chinese))
[11] CHEN H，LEE C F. A dynamic model for rainfall-induced landslides on natural slopes[J]. Geomorphology，2003，51(4)：269–288.
[12] 殷坤龙，姜清辉，汪 洋. 新滩滑坡运动全过程的非连续变形分析与仿真模拟[J]. 岩石力学与工程学报，2002，21(7)：959–962.(YIN Kunlong，JIANG Qinghui，WANG Yang. Numerical simulation on the movement process of Xintan landslide by DDA method[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(7)：959–962.(in Chinese))
[13] CROSTA G B. Forecasting hazard scenarios and implications for the evaluation of countermeasure efficiency for large debris avalanches[J]. Engineering Geology，2006，83(1/3)：236–253.
[14] 黄润秋，许 强，陶连金，等. 地质灾害过程模拟和过程控制研究[M]. 北京：科学出版社，2002：78–92.(HUANG Runqiu，XU Qiang，TAO Lianjin，et al. Simulation and control of geohazards process[M]. Beijing：Science Press，2002：78–92.(in Chinese))
[15] 张 龙，唐辉明，熊承仁，等. 鸡尾山高速远程滑坡运动过程PFC3D模拟[J]. 岩石力学与工程学报，2012，31(增1)：2 601–2 611.(ZHANG Long，TANG Huiming，XIONG Chengren，et al. Movement process simulation of high-speed long-distance Jiweishan landslide with PFC3D[J]. Chinese Journal of Rock Mechanics and Engineering， 2012，31(Supp.1)：2 601–2 611.(in Chinese))
[16] 胡明鉴，汪 稔，陈中学，等. 泥石流启动过程PFC数值模拟[J].岩土力学，2010，31(增1)：394–398.(HU Mingjian，WANG Ren，CHEN Zhongxue，et al. Initiation process simulation of debris deposit based on particle flow code[J]. Rock and Soil Mechanics，2010，31(Supp.1)：394–398.(in Chinese))
[17] SPENCER E. A Method of analysis of the stability of embankments assuming parallel inter-slice forces[J]. Geotechnique，1967，17(1)：11–26.
[18] 陈胜宏，万 娜. 边坡稳定分析的三维剩余推力法[J]. 武汉大学学报：工学版，2005，38(3)：70–73.(CHEN Shenghong，WAN Na. Study of three-dimensional residual thrust method for slope stability analysis[J]. Engineering Journal of Wuhan University，2005，38(3)：70–73.(in Chinese))
[19] 张均锋，丁 桦. 边坡稳定性分析的三维极限平衡法及应用[J]. 岩石力学与工程学报，2005，24(3)：365–370.(ZHANG Junfeng，DING Hua. Generalized 3D limit-equilibrium method for slope stability analysis and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(3)：365–370.(in Chinese))
[20] 许 强，黄润秋，殷跃平，等. 2009年6•5重庆武隆鸡尾山崩滑灾害基本特征与成因机制初步研究[J]. 工程地质学报，2009，17(4)：433–444.(XU Qiang，HUANG Runqiu，YIN Yueping，et al. The Jiweishan landslide of June 5，2009 in Wulong，Chongqing：characteristics and failure mechanism[J]. Journal of Engineering Geology，2009，17(4)：433–444.(in Chinese))
[21] 中国科学院力学研究所. 重庆武隆鸡尾山滑坡失稳机制研究初步结果[R]. 北京：中国科学院力学研究所，2010.(Institute of Mechanics，China Academy of Sciences. The research of instability mechanism of Jiweishan landslide in Wulong Chongqing[R]. Beijing：Institute of Mechanics，China Academy of Sciences，2010.(in Chinese))
[22] 刘 君，王丽丽. 鸡尾山滑坡全过程数值模拟[C]// 2012颗粒材料计算力学会议. [S.l.]：[s.n.]，2012：239–246.(LIU Jun，WANG Lili. Numerical simulation of Jiweishan landslide[C]// National Conference on Computational Mechanics of Granular Materials. [S.l.]：[s.n.]，2012：239–246.(in Chinese)) |
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2015, Vol. 34 
