Method of Analyzing Landslide Stability in Critical Condition

CHAI Hai-feng,SHEN Yue-fang,GUO Lei,WANG Guo-xu,JIN Jun,HUA Shuai1,2

doi:10.3969/j.issn.1001-5485.2013.05.016

Journal of Changjiang River Scientific Research Institute >

2013 , Vol. 30 >Issue 5: 70 - 75

DOI: https://doi.org/10.3969/j.issn.1001-5485.2013.05.016

Method of Analyzing Landslide Stability in Critical Condition

Expand

1.Engineering Research Center of Rock-Soil Drilling and Excavation and Protection of Ministry of Education, China University of Geosciences, Wuhan 430074, China; 2.Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

Received date: 2012-05-09

Revised date: 2013-04-28

Online published: 2013-04-28

Fold

Abstract

On the basis of slice-dividing method and limiting equilibrium principle,a critical formula was set up by relating the shear strength of soil with the dip angle of critical landslide surface. The formula was employed to analyze the variation of dip angle with overburden pressure. It’s verified that shear failure of the slope would not occur when the height of slope is less than a limit value with the slope angle in the range of 0-90°. In addition,two ideas were developed from the formula to analyze the causes of instability of two landslide cases. The results were consistent with monitoring data,and two methods of calculating the residual sliding force were given. In the second landslide case,another formula which calculates the influence of thrust on slope’s critical state was also built. The advantage of this method which relates the shear strength of soil with the critical dip angle of landslide surface is that the sliding surface is analyzed point by point,and the steady-state at each point is identified. But the method still needs to be improved and explored in calculation. The method which associates the mechanical roperties with geometric shape provides new idea for the evaluation of slope stability.

Key words： shear strength; limit equilibrium; critical dip angle; critical formula; thrust

Cite this article

CHAI Hai-feng,SHEN Yue-fang,GUO Lei,WANG Guo-xu,JIN Jun,HUA Shuai^1,2 . Method of Analyzing Landslide Stability in Critical Condition[J]. Journal of Changjiang River Scientific Research Institute, 2013 , 30(5) : 70 -75 . DOI: 10.3969/j.issn.1001-5485.2013.05.016

References

［1］殷跃平. 中国典型滑坡［M］. 北京:中国大地出版社，2007.（YIN Yue-ping. Landslides in China：Selected Case Studies
［M］. Beijing: China Land Press,2007.（in Chinese））
［2］方云,林彤. 土力学［M］. 武汉: 中国地质大学出版社，2002.（FANG Yun,LIN Tong. Soil Mechanics［M］. Wuhan: CUG Press,2002.（in Chinese））
［3］袁富强. 滑坡稳定性研究现状综述［J］. 中国水运，2009,9(10): 50-51.（YUAN Fu-qiang. The Description of the Landslide Stability Research Status［J］. China Water Transport,2009,9(10):50-51.（in Chinese））
［4］沈尧亮,侯殿英. 传递系数法的原型与衍生［J］. 工程勘察,2010(增1): 477-486.（SHEN Yao-liang,HOU Dian-ying. Transfer Coefficient Method of Prototype and Derivatives［J］. Geotechnical Investigation & Surveying,2010(Sup.1):477-486.（in Chinese））
［5］朱大勇. 边坡临界滑动场及其数值模拟［J］. 岩土工程学报,1997,19(1):63-69.(ZHU Da-yong. Critical Slip Field of Slope and Its Numerical Simulation［J］. Chinese Journal of Geotechnical Engineering,1997,19(1): 63-69.（in Chinese）)
［6］徐嘉谟. 用休止角和黏聚力估算边坡体稳定系数的一种简易方法［C］ ∥中国岩石力学与工程学会.面向21世纪的岩石力学与工程:中国岩石力学与工程学会第四次学术大会论文集,北京：中国科学技术出版社，1996:316-324.（XU Jia-mo. A Simple and Easy Method of Estimating the Stability Factor of Slope by Taking Rest Angle and Cohesion ［C］//China Rock Mechanics and Engineering Society,Rock Mechanics and Engineering for the 21st Century: Proceedings of the Fourth Conference of Rock Mechanics and Engineering Society. Beijing: China Science and Technology Press,1996:316-324.（in Chinese））
［7］孙世国,冉启发,李国柱. 应用临界滑移场技术进行坡角优化设计的方法［J］. 中国矿业,2006,15(10):72-74.(SUN Shi-guo,RAN Qi-fa,LI Guo-zhu. Method of Optimum Design Using Critical Sliding Field［J］. China Mining Magazine,2006,15(10): 72-74.（in Chinese）)
［8］ E·叶米里扬诺娃(苏). 滑坡作用的基本规律［M］. 重庆: 重庆出版社，1986. （EMELYANOVA E. The Basic Rule of Landslide Action ［M］. Chongqing: Chongqing Press,1986.（in Chinese））
［9］蒋秀玲,张常亮. 三峡水库水位变动下的库岸滑坡稳定性评价［J］. 水文地质工程地质,2010,37(6):38-42.(JIANG Xiu-lin,ZHANG Chang-liang. Stability Assessment for the Landslide Undergoing the Effects of Water Level Fluctuation in the Three Gorges Reservoir Area,China［J］. Hydrogeology & Engineering Geology,2010,37(6): 38-42.（in Chinese））
［10］涂鹏飞,岑仲阳,余和元.马家沟滑坡变形特征及稳定性分析［J］.铁道建筑,2011,（4）: 95-97.（TU Peng-fei,CEN Zhong-yang,YU He-yuan. Analysis of the Deformation Characteristics and Stability of Majiagou Landslide［J］. Railway Engineering,2011,(4):95-97.（in Chinese））
［11］周宗华,王翔俊,余和园. 线性回归在滑坡监测数据粗差判别中的应用［J］. 中国地质灾害与防治学报,2009,20(3): 118-121. （ZHOU Zong-hua,WANG Xiang-jun,YU He-yuan. Application of Linear Regression Theory in Landslides Monitoring Gross Error Analysis［J］. The Chinese Journal of Geological Hazard and Control,2009,20(3): 118-121. （in Chinese））
［12］徐平,李同录,李萍.考虑非饱和渗流作用下三峡库岸滑坡稳定性研究［J］. 中国地质灾害与防治学报,2010,21(1): 7-12. （XU Ping,LI Tong-lu,LI Ping. Stability Study on Majiagou Landslide in Three Gorges Reservoir Area with Consideration of Unsaturated Seepage［J］. The Chinese Journal of Geological Hazard and Control,2010,21(1): 7-12.（in Chinese））
［13］李会中,潘玉珍,王团乐,等. 三峡库区千将坪滑坡成因与机制分析［J］. 人民长江,2006,37(7): 12-20.(LI Hui-zhong,PAN Yu-zhen,WANG Tuan-yue, et al. Cause and Mechanism of Qianjiangping Landslide in Three Gorges Reservoir Area［J］. Yangtze　River,2006,37(7): 12-20.（in Chinese）)
［14］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,LI Shou-ding, et al . Occurrence,Geology and Geomorphology Characteristics and Origin of Qiangjiangping 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）)
［15］李会中,王团乐,孙立华,等. 三峡库区千将坪滑坡地质特征与成因机制分析［J］. 岩土力学,2006,27(增2): 1239-1244. (LI Hui-zhong,WANG Tuan-yue,SUN Li-hua, et al. Characteristic and Mechanism of Qianjiangping Landslide in Three Gorges Reservoir Area［J］. Rock and Soil Mechanics,2006,27(Sup.2): 1239-1244.（in Chinese）)
［16］肖诗荣,刘德富,胡志宇. 三峡库区千将坪滑坡高速滑动机制研究［J］. 岩土力学,2010,31(11): 3531-3536.(XIAO Shi-rong,LIU De-fu,HU Zhi-yu. Study of High Speed Slide Mechanism of Qianjiangping Landslide in Three Gorges Reservoir Area［J］. Rock and Soil Mechanics,2010,31(11): 3531-3536.（in Chinese）)
［17］殷跃平,彭轩明. 三峡库区千将坪滑坡失稳探讨［J］. 水文地质工程地质,2007，(3):51-54.(YIN Yue-ping,PENG Xuan-ming. Failure Mechanism on Qianjiangping Landslide in the Three Gorges Reservoir Region［J］. Hydrogeology & Engineering Geology,2007，(3): 51-54.（in Chinese）)
［18］徐开祥. 湖北省秭归县沙溪镇千将坪滑坡［J］. 中国地质灾害与防治学报,2003,14(3): 142.(XU Kai-xiang. Qianjiangping Landslide in Shaxi Town,Zigui County of Hubei Province［J］. The Chinese Journal of Geological Hazard and Control,2003,14(3): 142.（in Chinese）)

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References