长江科学院院报2025，Vol.42Issue(9)：114-121,8.DOI:10.11988/ckyyb.20240812
库水位变化对水布垭高面板堆石坝变形影响分析
Impact of Reservoir Water Level Changes on Deformation of Shuibuya High Concrete-faced Rockfill Dam
摘要
Abstract
[Objective]Reservoir water levels fluctuate periodically every year during the operation period.Exist-ing research has shown that the late-term deformation of rockfill dams is mainly caused by the prolonged water cycle loading.To thoroughly understand the impact of periodic reservoir water level fluctuations on long-term dam deform-ation,this study combines qualitative and quantitative analyses using nearly 17 years of deformation monitoring data from the Shuibuya concrete-faced rockfill dam(CFRD).[Methods]Qualitative analysis focused on the impact of reservoir water level changes on deformations of the dam interior and its downstream face.Quantitative analysis em-ployed the cross-correlation method to investigate the relationship between water level variation and settlement at the section of maximum dam height.[Results](1)Late-stage settlement deformation was mainly concentrated in the central upstream and upper downstream areas of the dam body,and the settlement and horizontal displacement in-crements in the upper downstream converged more slowly.(2)The late-stage deformation of dam body was primari-ly caused by reservoir water level fluctuations.At most measurement points at different elevations within the dam body,the settlement evolution curves exhibited fluctuations with the same frequency as the water level changes and lagged behind them.(3)The correlation coefficients between the dam body settlement increments and reservoir wa-ter levels were calculated,verifying a strong correlation between them.(4)The settlement and horizontal displace-ment increments on the downstream face of the dam were mainly concentrated at the top of the section of maximum dam height,and the influence of reservoir water level variation increased with elevation.[Conclusion]This study analyzes the deformation patterns of high CFRDs under reservoir water-level variations,and the findings provide valuable insights for the late-stage deformation monitoring and safety control in similar projects.关键词
水位升降/水布垭面板堆石坝/长期变形/交叉相关分析法/监测资料Key words
water level fluctuation/Shuibuya concrete-faced rockfill dam/long-term deformation/cross-correlation analysis method/monitoring data分类
建筑与水利引用本文复制引用
潘家军,韩冰,王艳丽,左永振,王俊鹏,朱月..库水位变化对水布垭高面板堆石坝变形影响分析[J].长江科学院院报,2025,42(9):114-121,8.基金项目
国家自然科学基金-联合基金项目(U21A20158) （U21A20158）
