On the basis of traditional slice method and assuming that the deformation of slice is continuous,a dynamic prediction model for the evolution of slopes is developed. In the model,the groundwater level variation caused by rainfall is taken into account,and the dissipation of the excess pore-fluid pressure in the saturated layer is governed by Terzaghi’s one-dimensional consolidation theory. It is believed that the speed and deformation of the sliding mass are of inhomogeneity,and the changes of inter-slice forces are caused by the deformation of slice. Through dynamics analysis of landslide using Newton’s laws of motion,the new model can simulate the whole sliding process and predict the maximum sliding speed and maximum sliding distance. The model is adopted to simulate the movement process of Qianjiangpin landslide,and the
result of computer simulation is in well accordance with actual cases.
LI Cong
,
JIANG Qing-hui
,
ZHU Jie-bing
,
ZENG Ping
. A Dynamic Prediction Model Based on Slice Method for the Evolution of Slopes[J]. Journal of Changjiang River Scientific Research Institute, 2013
, 30(5)
: 64
-69
.
DOI: 10.3969/j.issn.1001-5485.2013.05.015
［1］ HERRERA G,FERNANDEZ-MERODO J A,MULAS J, et al. A Landslide Forecasting Model Using Ground Based SAR Data:
The Portalet Case Study［J］. Engineering Geology,2009,105(3/4): 220-230.
［2］ SORNETTE D,HELMSTETTER A,ANDERSEN J V, et al. Towards Landslide Predictions: Two Case Studies ［J］. Physica A: Statistical Mechanics and Its Applications,2004,338(3/4): 605-632.
［3］ 邬爱清,丁秀丽,李会中,等. 非连续变形分析方法模拟千将坪滑坡启动与滑坡全过程［J］. 岩石力学与工程学报,2006,25(7): 1297-1303.(WU Ai-qing,DING Xiu-li,LI Hui-zhong, et al. Numerical Simulation of Startup and Whole Failure Process of Qianjiangping Landslide Using Discontinuous Deformation Analysis Method［J］. Chinese Journal of Rock Mechanics and Engineering,2006,25(7): 1297-1303.(in Chinese))
［4］ 兰恒星,伍法权. 基于条分法的滑坡位移非线性动力学模拟方法［J］. 工程地质学报,2000,8(3):374-378.(LAN Heng-xing,WU Fa-quan. A Non-linear Dynamic Modeling Method for Landslide Displacement based on Slice Method［J］. Journal of Engineering Geology,2000,8(3): 374-378.(in Chinese))
［5］ HUNGR O. A Model for the Runout Analysis of Rapid Flow Slides,Debris Flows,and Avalanches［J］. Canadian Geotechnical Journal,1995,32(4): 610-623.
［6］ MIAO Tian-de,LIU Zhong-yu,NIU Yong-hong, et al. A Sliding Block Model for the Runout Prediction of High-Speed Landslides［J］. Canadian Geotechnical Journal,2001,38(2): 217-226.
［7］ 代云霞,殷坤龙,汪 洋. 滑坡速度计算及涌浪预测方法探讨［J］. 岩土力学,2008,29(增): 407-411.(DAI Yun-xia,YIN Kun-long,WANG Yang. Discussion on Method of Landslide Velocity Calculation and Surge Prediction［J］. Rock and Soil Mechanics,2008,29(Sup.): 407-411.(in Chinese))
［8］ IVERSON R M. Landslides Triggering by Rain Filtration［J］. Water Resources Research,2000,36(7): 1897-1910.
［9］ HUTCHINSON J N. A Sliding-Consolidation Model for Flow Slides［J］. Canadian Geotechnical Journal,1986,23(2): 115-126.
［10］PASTOR M,QUECEDO M,FERNNDEZ-MERODO J A, et al. Modelling Tailing Dams and Mine Waste Dumps Failures［J］. Geotechnique,2002,52 (8):579-591.
［11］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.(PAN Jia-zheng. Anti-sliding Stability and Landslide Analysis for Buildings［M］. Beijing: Water Conservancy Press,1980.(in Chinese))
［12］廖秋林,李 晓,李守定,等. 三峡库区千将坪滑坡的发生、地质地貌特征、成因及滑坡判据研究［J］. 岩石力学与工程学报,2005,24(17): 3146-3153.(LIAO Qiu-lin,LI Xiao,LEE S, et al. Occurrence,Geology and Geomorphology Characteristics and Origin of Qianjiangping Landslide in Three Gorges Reservoir Area and Study on Ancient Landslide Criterion［J］. Chinese Journal of Rock Mechanics and Engineering,2005,24(17): 3146-3153.(in Chinese))
