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Stability analysis of the Xinlu Village landslide (Chongqing, China) and the influence of rainfall

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Abstract

On June 28, 2016, a landslide occurred in Xinlu Village, Qijiang District, Chongqing, China. The landslide volume was 854,200 m3. Exposed to continuous rainfall, the rocky part of the trailing edge slipped first, and then the soil part of the leading edge was pushed downward. Numerical simulations were used to analyze the formation characteristics of the landslide and to predict the stability of the landslide after the slip. In order to ensure the accuracy and rationality of numerical calculation, we used field surveys, laboratory tests, and back-calculation to restore the typical sections, determine the relevant mechanical parameters, and control boundary conditions. The displacement, stress, effective plastic strain distribution, and safety factor, obtained by numerical calculation, were compared to examine the action of rainfall. According to the evaluation of landslide stability and numerical calculation results, the Xinlu Village landslide remained in a peristaltic stage after the initial overall sliding, and additional sliding could occur under storm conditions.

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Funding

This study was supported by the National Key R&D Program of China (ID2018YFC1504803), the Geological Hazard Prevention and Control Project for Follow-up Work of the Three Gorges (ID0001212019CC60001) & (ID2018102849) and a Project from China Geological Survey (DD20190637).

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Correspondence to Yueping Yin.

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This paper is a product of the study on the Long-term Strength Weakening Law and Protection Measures of the Yangtze River Water Level in the Chongqing Reservoir Area of the Three Gorges.

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Wang, L., Yin, Y., Zhang, Z. et al. Stability analysis of the Xinlu Village landslide (Chongqing, China) and the influence of rainfall. Landslides 16, 1993–2004 (2019). https://doi.org/10.1007/s10346-019-01240-5

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  • DOI: https://doi.org/10.1007/s10346-019-01240-5

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