东庄水库蓄水对岸坡稳定性的影响预测分析

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关键词：东庄水库；滑坡；数值模型；库水位波动；稳定性；泾河中图分类号：P642．22；TV62 文献标志码：A doi：10．3969 ／ j．issn．1000－1379．2025．06．023引用格式：．东庄水库蓄水对岸坡稳定性的影响预测分析［J］．人民黄河，2025，47（6）：150－155．

Prediction Analysis of the Impact of Dongzhuang Reservoir Impounding on Embankment Stability

LIU Jianlei， WEI Tongyao， JIANG Yaofei（Yellow River Engineering Consulting Co．， Ltd．， Zhengzhou ， China）

Abstract： The banks of the Dongzhuang Reservoir area of the Jinghe River are crisscrossed with gullies and have a deep loess cover． After the reservoir area is filled with water， the fluctuation of water level will increase the probability of deformation and instability of new reservoir banks and the revival of ancient landslides． Based on the geological conditions of Dongzhuang Reservoir area， three typical water⁃related land⁃ slides with high risk （Hejia， Jiaojiahe and Fengjia） were selected for the analysis of the causes of landslides and the distribution characteris⁃ tics of landslides． The coupling mechanism between landslide deformation and water level fluctuation after water storage were analyzed by es⁃ tablishing numerical models． The results show that there are three higher⁃risk water⁃related landslides and they are typical loess⁃bedrock land⁃ slides within the 30 loess landslides in the reservoir area． The stability of loess landslides along the bank of the reservoir is affected by the fluctuation of reservoir water level． The gradual decline of reservoir water level and the long⁃term maintenance of high water level will lead to the reduction of the safety coefficient of the landslides． The faster the rate of decline of reservoir water level， the faster the safety coefficient of the landslides decreases to the minimum value． The possibility of overall large⁃scale sliding of loess landslides in the reservoir area is low． Conversely， the risk of instability of the leading edge slides is relatively high when the water level drops．

Key words： Dongzhuang Reservoir； landslides； numerical model； fluctuations in reservoir water level； stability； Jinghe River

水库岸坡稳定性是工程地质学者非常重视的课题之一［1－2］。（剩余9065字）