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WANG Lin-feng, LI Lin-gang, YANG Xun. Instability initiation mechanism of gravel soil slope in Three Gorges Reservoir: case study of Hongyanzi landslide in Wushan county[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 209-214. DOI: 10.11779/CJGE2018S2042
Citation: WANG Lin-feng, LI Lin-gang, YANG Xun. Instability initiation mechanism of gravel soil slope in Three Gorges Reservoir: case study of Hongyanzi landslide in Wushan county[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 209-214. DOI: 10.11779/CJGE2018S2042

Instability initiation mechanism of gravel soil slope in Three Gorges Reservoir: case study of Hongyanzi landslide in Wushan county

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  • Received Date: July 21, 2018
  • Published Date: October 29, 2018
  • After impoundment of the Three Gorges Reservoir, landslides have become one of the most serious geological hazards in this area. These landslides are mainly caused by the declining water levels and rainfall. Taking Hongyanzi landslide in Wushan county as an example, the collapsing initiation mechanism of bank slope combined debris and soil in the areas of Three Gorges Reservoir are studied. Based on the function and algorithm of FLAC3D seepage analysis module, the mechanism of Hongyanzi landslide is investigated. According to the topographical and geological conditions of Hongyanzi bank slope, the construction of seepage simulation of Hongyanzi landslide is realized by using the finite difference method, and reasonable condition of hydraulic head boundary is confirmed for this model. The change rules of the displacement field are drawn by simulating rainfall infiltration and different water level conditions by writing the built-in FISH function. The stability of bank slope combined debris and soil is analyzed under different water level and rainfall conditions. And the declining stability of bank slope is revealed in the process of rainfall and the declining water levels. The triggering factor of Hongyanzi landslide is the combined effects of rainfall and drawdown of water level. These research results provide a basis for studying the stability of debris and soil bank landslides with different reservoir water level and rainfall conditions.
  • [1]
    DU J, YIN K, LACASSE S.Displacement prediction in colluvial landslides, Three Gorges Reservoir, China[J]. Landslides, 2013, 10( 2): 203-218.
    [2]
    HUANG Q X, WANG J L, XUE X.Interpreting the influence of rainfall and reservoir infilling on a landslide[J]. Landslides, 2016, 13(9): 1139-1149.
    [3]
    GUO D, MASANORI H, JIA H.Influential factors on slope stability and landslide mobility[J]. American Society of Civil Engineers, 2013, 31(8) : 247-254.
    [4]
    吴琼, 唐辉明, 王亮清, 等. 库水位升降联合降雨作用下库岸边坡中的浸润线研究[J]. 岩土力学, 2009, 30(10): 3025-3031.
    (WU Qiong, TANG Hui-ming, WANG Liang-qing, et al.Analytic solutions for phreatic line in reservoir slope with inclined impervious bed under rainfall and reservoir water level fluctuation[J]. Rock and Soil Mechanics, 2009, 30(10): 3025-3031. (in Chinese))
    [5]
    江洎洧, 项伟, 曾雯, 等. 三峡库区黄土坡临江滑坡体水岩(土)相互作用机理[J]. 岩土工程学报, 2012, 34(7): 1209-1216.
    (JIANG Ji-wei, XIANG Wei, ZENG Wen, et al.Water-rock(soil) interaction mechanism of Huangtupo riverside landslide in Three Gorges Reservoir[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(7): 1209-1216. (in Chinese))
    [6]
    SONG K, YAN E, ZHANG G, et al.Effect of hydraulic properties of soil and fluctuation velocity of reservoir water on landslide stability[J]. Environmental Earth Sciences, 2015, 74(6): 1-11.
    [7]
    周丽, 汪洋, 杜娟. 库水位下降和降雨影响下李家湾滑坡的稳定性计算[J]. 安全与环境工程, 2010, 17(3): 5-9.
    (ZHOU Li, WANG Yang, DU Juan.Calculation of Lijiawan landslide stability under the drawdown and rainfall conditions[J]. Safety and Environmental Engineering, 2010, 17(3): 5-9. (in Chinese))
    [8]
    蒋中明, 熊小虎, 曾铃. 基于FLAC3D平台的边坡非饱和降雨入渗分析[J]. 岩土力学, 2014, 35(3): 855-860.
    (JIANG Zhong-ming, XIONG Xiao-hu, ZENG Ling.Unsaturated seepage analysis of slope under rainfall condition based on FLAC3D[J]. Rock and Soil Mechanics, 2014, 35(3): 855-860. (in Chinese))
    [9]
    YIN Y, WANG H, GAO Y, et al.Real-time monitoring and early warning of landslides at relocated Wushan Town, the Three Gorges Reservoir, China[J]. Landslides, 2010, 7(3): 389-389.
    [10]
    FREDLUND D, MORGENSTERN N, WIDGER R.The shear strength of unsaturated soils[J]. Canadian Geotechnical Journal, 1978, 15(3): 313-321.
    [11]
    Itasca Consulting Group, Inc. Online Manual of FLAC3D Fast Lagrangian Analysis of Continua in 3 Dimensions[M]. Version 5.0. Minneapolis: Itasca Inc. 2012.

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