Numerical Simulation of Qingshi Landslide Beside Shennü Stream in the Three Gorges With the Discrete Element Method Under Different Water Levels

TANG Hong-mei; YAN Zhao-qi; CHEN Hong-kai

doi:10.3879/j.issn.1000-0887.2016.05.007

Volume 37 Issue 5

Turn off MathJax

Article Contents

Article Navigation > Applied Mathematics and Mechanics > 2016 > 37(5): 510-521

TANG Hong-mei, YAN Zhao-qi, CHEN Hong-kai. Numerical Simulation of Qingshi Landslide Beside Shennü Stream in the Three Gorges With the Discrete Element Method Under Different Water Levels[J]. Applied Mathematics and Mechanics, 2016, 37(5): 510-521. doi: 10.3879/j.issn.1000-0887.2016.05.007

Citation:

PDF( 6084 KB)

Numerical Simulation of Qingshi Landslide Beside Shennü Stream in the Three Gorges With the Discrete Element Method Under Different Water Levels

doi: 10.3879/j.issn.1000-0887.2016.05.007

Institute of Geotechnical Engineering, Chongqing Jiaotong University, Chongqing 400074, P.R.China

Received Date: 2015-06-12
Rev Recd Date: 2015-11-30
Publish Date: 2016-05-15

Abstract

Abstract

To study the deformation and failure process of Qingshi landslide located in the Three Gorges reservoir area, a discrete element model was established to simulate this landslide with the PFC2D software under different water levels. The simulation results show that the middle part of the landslide has the largest vertical displacements and velocities at the same time under the water level of 165 m. Besides, the horizontal stresses and strain rates of the landslide toe reach the maximum values firstly in the late period under the water level of 165 m. Qingshi landslide has little deformation under the water level of 145 m. The failure modes are the same under the water levels of 155 m, 165 m and 175 m, and a typical failure process can be divided into 4 periods: weakening and creeping of the slip mass, deformation of the front part, instability and sliding of the middle part, and stabilization of the landslide. In the sliding process, the rock and soil mass near the sliding zone will weaken in strengths to some extent. The simulated steady state of Qingshi landslide is consistent with the measured results in situ under different water levels, i.e. the cracks’appearance and development under the 175 m water level are close to the real situations, with only allowable deviations. It is proved that the deformation and failure process of Qingshi landslide can be simulated satisfactorily with the discrete element method.
- geotechnical engineering,
- landslide deformation and failure,
- numerical simulation,
- discrete element method,
- Qingshi landslide

FullText(HTML)

References(21)

References

[1]	中国岩石力学与工程学会地面岩石工程专业委员会, 中国地质学会工程地质专业委员会. 中国典型滑坡[M]. 北京: 科学出版社, 1988.(The Ground Rock Engineering Professional Committee, Chinese Society for Rock Mechanics and Engineering, Engineering Geological Commission, China Geology Society of IAEG China National Group. Chinese Typical Landslide [M]. Beijing: Science Press, 1988.(in Chinese))
[2]	刘传正, 刘艳辉, 温铭生, 李铁峰, 连建发, 秦胜伍. 长江三峡库区地质灾害成因与评价研究[M]. 北京: 地质出版社, 2007.(LIU Chuan-zheng, LIU Yan-hui, WEN Ming-sheng, LI Tie-feng, LIAN Jian-fa, QIN Sheng-wu. Study of Geological Disasters and Evaluation of the Three Gorges Reservoir [M]. Beijing: Geological Publishing House, 2007.(in Chinese))
[3]	刘新喜, 夏元友, 张显书, 郭瑞清. 库水位下降对滑坡稳定性的影响[J]. 岩石力学与工程学报, 2005,24(8): 1439-1444.(LIU Xin-xi, XIA Yuan-you, ZHANG Xian-shu, GUO Rui-qing. Effects of drawdown of reservoir water level on landslide stability[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(8): 1439-1444.(in Chinese))
[4]	刘才华, 陈从新, 冯夏庭. 库水位上升诱发边坡失稳机理研究[J]. 岩土力学, 2005,26(5): 769-773.(LIU Cai-hua, CHEN Cong-xin, FENG Xia-ting. Study on mechanism of slope instability due to reservoir water level rise[J]. Rock and Soil Mechanics,2005,26(5): 769-773.(in Chinese))
[5]	向玲, 王世梅, 王力. 动水压力型滑坡对库水位升降作用的响应——以三峡库区树坪滑坡为例[J]. 工程地质学报, 2014,22(5): 876-882.(XIANG Ling, WANG Shi-mei, WANG Li. Response of typical hydrodynamic pressure landslide to reservoir water level fluctuation: shuping landslide in Three Gorges Reservoir as an example[J]. Journal of Engineering Geology,2014,22(5): 876-882.(in Chinese))
[6]	夏敏, 任光明, 马鑫磊, 董清志, 黄帮芝, 孙仁先. 库水位涨落条件下滑坡地下水渗流场动态特征[J]. 西南交通大学学报, 2014,49(3): 399-405.(XIA Min, REN Guang-ming, MA Xing-lei, DONG Qing-zhi, HUANG Bang-zhi, SUN Ren-xian. Dynamic responses of groundwaterseepage of landslide influenced by fluctuation of reservoir water level[J]. Journal of Southwest Jiaotong University,2014,49(3): 399-405.(in Chinese))
[7]	张龙, 唐辉明, 熊承让, 黄磊, 邹宗兴. 鸡尾山高速远程滑坡运动过程PFC^3D模拟[J]. 岩石力学与工程学报, 2012,31(S1): 2601-2611.(ZHANG Long, TANG Hui-ming, XIONG Cheng-rang, HUANG Lei, ZOU Zong-xing. Movement process simulation of high-speed long-distance Jiweishan landslide with PFC^3D[J]. Chinese Journal of Rock Mechanics and Engineering, 2012,31(S1): 2601-2611.(in Chinese))
[8]	石崇, 王盛年, 刘琳. 地震作用下陡岩崩塌颗粒离散元数值模拟研究[J]. 岩石力学与工程学报, 2013,32(S1): 2798-2805.(SHI Chong, WANG Sheng-nian, LIU Ling. Research of avalanche disaster numerical simulation based on granular discrete element method of high-steep slope under seismic loads[J]. Chinese Journal of Rock Mechanics and Engineering,2013,32(S1): 2798-2805.(in Chinese))
[9]	周健, 王家全, 曾远, 张姣. 土坡稳定分析的颗粒流模拟[J]. 岩土力学, 2009,30(1): 86-90.(ZHOU Jian, WANG Jia-quan, ZENG Yuan, ZHANG Jiao. Simulation of slope stability analysis by particle flow code[J]. Rock and Soil Mechanics,2009,30(1): 86-90.(in Chinese))
[10]	MENG Jing-jing, CAO Ping, ZHANG Ke. Jointed rock slopes stability analysis using PFC2D[C]// Geo-Congress.San Diego, California, USA, 2013: 574-581.
[11]	HSU Sung-chi, LIN Ji-yuan, YANG Ming-der. Slope instability of high terrace deposits under extreme weather conditions[C]// Geo-Congress . San Diego, California, USA, 2013: 462-471.
[12]	ZHAO Hong-hua, SHAO Long-tan, JI Shun-ying. Numerical simulation of triaxial test on the dense sand by DEM[C]// GeoHunan International Conference.Hunan, 2011: 233-241.
[13]	Bahaaddini M, Sharrock G, Hebblewhite B K. Numerical direct shear tests to model the shear behaviour of rock joints[J]. Computers and Geotechnics,2013,51: 101-115.
[14]	张晓平, 吴顺川, 王思敬. 类土质路堑边坡动态监测及数值模拟分析[J]. 岩石力学与工程学报, 2008,27(S2): 3431-3440.(ZHANG Xiao-ping, WU Shun-chuan, WANG Si-jing. Dynamic monitoring and numerical analysis of soil-like cut slope[J]. Chinese Journal of Rock Mechanics and Engineering,2008,27(S2): 3431-3440.(in Chinese))
[15]	崔铁军, 马云东, 王来贵. 基于PFC3D的露天矿边坡爆破过程模拟及稳定性研究[J]. 应用数学和力学, 2014,35(7): 759-767.(CUI Tie-jun, MA Yun-dong, WANG Lai-gui. Blasting process simulation and stability study of an open mine slope based on PFC3D[J]. Applied Mathematics and Mechanics,2014,35(7): 759-767.(in Chinese))
[16]	王培涛, 杨天鸿, 朱立凯, 刘洪磊. 基于PFC2D岩质边坡稳定性分析的强度折减法[J]. 东北大学学报(自然科学版), 2013,34(1): 127-130.(WANG Pei-tao, YANG Tian-hong, ZHU Li-kai, LIU Hong-lei. Strength reducation method for rock slope stability analysis based on PFC2D[J]. Journal of Northeastern University (Natural Science),2013,34(1): 127-130.(in Chinese))
[17]	黄达, 黄润秋, 雷鹏. 贯通型锯齿状岩体结构面剪切变形及强度特征[J]. 煤炭学报, 2014,39(7): 1229-1237.(HUANG Da, HUANG Run-qiu, LEI Peng. Shear deformation and strength of through-going saw-tooth rock discontinuity[J]. Journal of China Coal Society,2014,39(7): 1229-1237.(in Chinese))
[18]	李祥龙, 唐辉明, 胡巍. 层面参数对顺层岩质边坡地震动力破坏过程影响研究[J]. 岩土工程学报, 2014,36(3): 466-473.(LI Xiang-long, TANG Hui-ming, HU Wei. Effect of bedding plane parameters on dynamic failure process of sliding rock slope[J]. Chinese Journal of Geotechnical Engineering,2014,36(3): 466-473.(in Chinese))
[19]	Wang C, Tannant D D, Lilly P A. Numerical analysis of the stability of heavily jointed rock slopes using PFC2D[J]. International Journal of Rock Mechanics and Mining Sciences,2003,40(3): 415-424.
[20]	王世昌, 陈小婷, 黄波林, 刘广宁. 三峡库区青石滑坡的变形特征及形成机理研究[J]. 人民长江, 2013,44(S2): 66-70.(WANG Shi-chang, CHEN Xiao-ting, HUANG Bo-lin, LIU Guang-ning. Study on deformation characteristics and mechanism of Qingshi landslide in three gorges reservoir[J]. Yangtze River,2013,44(S2): 66-70.(in Chinese))
[21]	胥勋剑, 杨强. 三峡库区青石滑坡应急监测及变形演化趋势研究[J]. 路基工程, 2014,174(3): 85-89.(XU Xun-jian, YANG Qiang. Study on emergency monitoring and deformation evolution trend of Qingshi landslide in the three gorges reservoir[J]. Subgrade Engineering,2014,174(3): 85-89.(in Chinese))