Comprehensive analysis of landslide stability and related countermeasures: a case study of the Lanmuxi landslide in China
Comprehensive analysis of landslide stability and related countermeasures: a case study of the Lanmuxi landslide in China
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滑坡稳定性综合分析及相关对策——以我国兰木溪滑坡为例
DOI：
10.1038/s41598-019-48934-3
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发表时间：
2019-08
影响因子：
4.6
通讯作者：
Chen Guangqi
中科院分区：
文献类型：
--
作者：
Han Zheng;Su Bin;Li Yange;Ma Yangfan;Wang Weidong;Chen Guangqi
本文提出了一种滑坡稳定性分析的综合方法和治理措施的减灾效果。该方法是理论方法和数值方法的结合。针对土体强度参数的不确定性，综合可靠度法反分析结果、定量法反分析结果以及现场地质试验结果，确定了土体强度参数的合理取值。为了评价边坡的稳定性，分别采用二维上限法和强度折减法进行了极限分析和有限元模拟。为了说明所提出的方法，所谓的兰木溪滑坡在中国被选为案例研究。结果表明，边坡的应力和应变主要集中在坡脚和坡顶处。根据分析结果，提出了采取锚格构梁、滑坡桩、裂缝填充等措施，以降低滑坡的破坏风险。基于有限元分析的效果评估验证了所推荐的对策的可行性和有效性。
We report on a comprehensive method for analyzing landslide stability and the mitigation effect of countermeasures in this paper. The proposed method is a combination of theoretical method and numerical method. To address the uncertainties of the soil strength parameters, the rational values of these parameters are comprehensively determined by the back-analysis result of the reliability method and the result by the quantitative method, as well as thein-situgeological test. To evaluate the slope stability, the limit analysis using the 2D upper bound method and the FEM simulation using strength reduction method are performed, respectively. In order to illustrate the presented method, the so-called Lanmuxi landslide in China is selected as a case study. Results demonstrated that the stress and strain majorly concentrated at the toe and crown of the slope. According to the analysis results, countermeasures consisting of anchor lattice beams, landslide piles, and cracks filling, are suggested to reduce the failure risk of the landslide. Effect assessment based on the FEM analysis verifies the feasibility and effectiveness of the recommended countermeasures.
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