(1. China Institute of Geological Environment Monitoring，Beijing 100081，China；2. Faculty of Engineering，China University of Geosciences，Wuhan，Hubei 430074，China；3. Chongqing No. 107 Municipal Construction Engineering Co.，Ltd.，Chongqing 401120，China；4. Chongqing 107 Geological Team，Chongqing 401120，China；5. National Field Observation
and Research Station of Landslides in the Three Gorges Reservoir Area of Yangtze River，China Three Gorges University，
Yichang，Hubei 443002，China；6. Wuhan Center of China Geological Survey，Wuhan，Hubei 430205，China)
Abstract：In this paper，the 175m reservoir water level operation process of the Three Gorges Reservoir Project from 2008 to 2020 is analyzed，and a typical curve of the average annual reservoir water level fluctuation is obtained. Taking the Taping landslide in Wushan county as a case study，the relationship between the average reservoir water level fluctuation and the phreatic line in the typical accumulative landslide is established by the modified analytical solution of one-dimensional unsteady seepage equation. Furthermore，the unbalanced thrust method considering time variable is used to calculate the factor of safety of the accumulative landslide under reservoir water level fluctuation. Considering the good connection between reservoir water and groundwater in the reservoir landslide，it is difficult to adopt conventional anti-slide piles in prevention engineering，and hence，the small and medium calibre anti-slide pile group is proposed to be adopted in the prevention design of the reservoir landslide in this paper. It is worth noting that，in August 2020，the Three Gorges Reservoir area encountered the maximum peak discharge since the construction of the dam in 2003，reaching 75 000 m3/s，therefore，the study on the landslide stability in the hydrological year can provide a reference for the stability analysis and prevention design of the reservoir landslides under special working conditions.
殷跃平1，张晨阳2，闫 慧3，肖明友4，侯雪峰4，朱赛楠1，黄波林5，代贞伟6，张 楠1. 三峡水库蓄水运行滑坡渗流稳定和防治设计研究[J]. 岩石力学与工程学报, 2022, 41(4): 649-659.
YIN Yueping1，ZHANG Chenyang2，YAN Hui3，XIAO Mingyou4，HOU Xuefeng4，ZHU Sainan1，HUANG Bolin5，DAI Zhenwei6，ZHANG Nan1. Research on seepage stability and prevention design of landslides during impoundment operation of the Three Gorges Reservoir，China. , 2022, 41(4): 649-659.
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2022, Vol. 41 
