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Stability analysis of a large landslide in hydropower engineering

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Abstract

This paper is devoted to stability analysis of the Zheng-Gang landslide in the Gu-Shui hydropower station in China. Based on the geological field investigations, the formation processes, the deformation mechanism related to rainfalls and the instability mode are first analyzed. Large scale direct shear tests on soils in the slip zone are performed in order to characterize influences of the content of particle and water on natural shear strength. Due to the difficulty to consider the lateral constrain and curvature effects of the bottom sliding surface, different three-dimensional models are established using the limit equilibrium method and the large strain Lagrange finite difference method. The results of stability analysis are in good agreement with the field observations. It is shown that the natural landslide is in a limit state and the creep deformation along the slipping surface is the main mechanism of landslide instability under in situ conditions.

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Acknowledgments

Financial supports from the state 973 project under Grant number 2011CB013504 and from the Fundamental Research Founds for the Central Universities under Grant number 13CX02095A are gratefully acknowledged. The authors would also like to thank Shi C. for his valuable suggestions.

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Authors and Affiliations

  1. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, 266555, Shandong, China

    Y. Zhang

  2. College of Civil and Transportation Engineering, Hohai University, Nanjing, 210098, China

    J. F. Shao, W. Y. Xu & H. K. Sun

  3. Laboratory of Mechanics of Lille, Villeneuve d’Ascq, France

    Y. Zhang & J. F. Shao

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  1. Y. Zhang
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  2. J. F. Shao
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  3. W. Y. Xu
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  4. H. K. Sun
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Correspondence to J. F. Shao.

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Zhang, Y., Shao, J.F., Xu, W.Y. et al. Stability analysis of a large landslide in hydropower engineering. Nat Hazards 70, 527–548 (2014). https://doi.org/10.1007/s11069-013-0826-4

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  • DOI: https://doi.org/10.1007/s11069-013-0826-4

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