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Volume 24 Issue 1
Feb 2013
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Journal of Earth Science  > 2013  >  24(1): 104-110.
Hongyue Sun, Jie Zhong, Yu Zhao, Shuijin Shen, Yuequan Shang. The Influence of Localized Slumping on Groundwater Seepage and Slope Stability. Journal of Earth Science, 2013, 24(1): 104-110. doi: 10.1007/s12583-013-0307-4
Citation: Hongyue Sun, Jie Zhong, Yu Zhao, Shuijin Shen, Yuequan Shang. The Influence of Localized Slumping on Groundwater Seepage and Slope Stability. Journal of Earth Science, 2013, 24(1): 104-110. doi: 10.1007/s12583-013-0307-4
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The Influence of Localized Slumping on Groundwater Seepage and Slope Stability

doi: 10.1007/s12583-013-0307-4
  • 1.

    Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310058, China

  • 2.

    Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China

Funds:

the National Natural Science Foundation of China 40972187

the Key Innovation Team Support Project of Zhejiang Province 2009R50050

More Information
  • Corresponding author: Yu Zhao: zhao_yu@zju.edu.cn
  • Received Date: 29 Jan 2012
  • Accepted Date: 25 May 2012
  • Publish Date: 01 Feb 2013
    Abstract
  • Transverse cracks and localized slumps frequently occur within loose deposits slopes when the slope base is removed either from natural or manmade processes. Although the contribution of rainfall to the slope failures was intensely discussed, the influence of localized slumps on hydrogeological conditions has received less attention. Usually, loose deposits slopes are composed of soil layers with different permeability; localized slumps may cause flow paths partly blocked in the permeable layer that is adversely confined between impermeable layers. In this study, a case history of such failure, Xiaodan (小旦) landslide, is introduced in detail. The localized slump caused the pressure head in the permeable layer to increase substantially, which reduced the stability of the slope. To quantify the influence, Bernoulli equations are used to analytically study the increase of the pressure head with a hydrogeological model simplified from the slope. The factor of safety assessed by limit equilibrium methods may decrease up to 20% when the 80% of flow path is blocked. Thus, we should pay attention not only to changes of stress filed due to localized slumps but also to the influence of seepage variation on the slope stability.

     

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