Stability analysis of an ancient landslide considering shear strength reduction behavior of slip zone soil

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• 作者：Xiao-ping Chen ; Hong-hu Zhu ; Jing-wu Huang ; Dong Liu
• 关键词：Slip zone ; Residual shear strength ; Landslide ; Strain ; softening ; Slope stability ; Finite element analysis
• 刊名：Landslides
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：13
• 期：1
• 页码：173-181
• 全文大小：1,660 KB
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• 作者单位：Xiao-ping Chen (1)
  Hong-hu Zhu (2)
  Jing-wu Huang (3)
  Dong Liu (4)
  
  1. Key Laboratory of Disaster Forecast and Control in Engineering, College of Science and Engineering, Jinan University, Guangzhou, China
  2. School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
  3. Guangdong Hydropower Planning and Design Institute, Guangzhou, China
  4. Shenzhen Comprehensive Geotechnical Engineering Investigation & Design Co. LTD, Shenzhen, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Applied Geosciences
  Geography
  Agriculture
  Civil Engineering
  
• 出版者：Springer Berlin Heidelberg
• ISSN：1612-5118

文摘

In this paper, the stability of an ancient landslide during the first impounding of a nearby reservoir is investigated through the analyses of the shear strength reduction behavior of slip zone soil. In view of the experimental observations, an empirical strain-dependent soil model is established and is then incorporated in finite element analyses. The numerical analysis results show that the failing sections progressively develop due to the soil strength declines from peak toward residual, and the shear zone propagates within the front slope. It is demonstrated in the numerical results that the toe weighting measure has a significant effect on restraining the shear displacements of the soils and preventing the progressive failure of the landslide. The field observations further confirmed the stability condition of the reinforced landslide. Keywords Slip zone Residual shear strength Landslide Strain-softening Slope stability Finite element analysis