摘要
【目的】抽水蓄能电站大坝水位处于放水-蓄水循环变化过程,大水位变幅致使大坝温度和应力等边界条件不断变化,直接影响到大坝工作性态。为保障大坝的安全运行,开展大水位变幅对抽水蓄能电站大坝工作性态影响研究。【方法】以福建周宁抽水蓄能电站下水库大坝为研究对象,通过分析蓄水运行初期的大坝监测数据,采用三维有限单元法,探讨了大水位变幅下大坝的温度场、变形场及应力场的变化规律。【结果】(1)库水温度与多年平均气温有明显相关性。(2)同一高度的混凝土坝体内部温度较高,两侧温度略低;水库蓄水后,水位以下的混凝土表面温度基本与水库水温一致。(3)在蓄水运行初期,大水位变幅下,大坝的变形和应力变化量较小,最大变形变化量为0.15~0.17 mm/m。【结论】研究结果为大坝的安全运行提供了技术支持,在保障类似抽水蓄能电站大坝的建设和运行安全方面具有一定的推广应用价值。
【Objective】The water level of the reservoir dam in a pumped storage power station undergoes cyclic fluctuations of release and storage.Large water level variations cause continuous changes in boundary conditions such as dam temperature and stress,directly affecting the dam′s working performance.To ensure the safe operation of the dam,this study investigates the impact of large water level variations on the dam′s working performance in pumped storage power stations.【Methods】Taking the lower reservoir dam of the Zhouning Pumped Storage Power Station in Fujian Province as the research object,monitoring data during the initial stage of impoundment were analyzed.Using a three-dimensional finite element method,the variation patterns of the temperature field,deformation field,and stress field of the dam under large water level variations were investigated.【Results】(1)Reservoir water temperature showed a significant correlation with the multi-year average air temperature.(2)At the same elevation,the internal temperature of the concrete dam body was higher than at the sides,and after impoundment,the surface temperature of the concrete below the water level was essentially consistent with the reservoir water temperature.(3)During the initial stage of impoundment,under large water level variations,the deformation and stress changes of the dam were relatively small,with the maximum deformation ranging from 0.15 to 0.17 mm/m.【Conclusion】The results provide technical support for the safe operation of the dam and have reference value for the construction and safe operation of similar pumped storage power station dams.
作者
周顺田
林兴铖
卢雨欣
王振红
汪娟
张凯恒
侯文倩
ZHOU Shuntian;LIN Xingcheng;LU Yuxin;WANG Zhenhong;WANG Juan;ZHANG Kaiheng;HOU Wenqian(Huadian Fuxin Zhouning Pumped Storage Co.,Ltd.,Ningde 352100,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)
出处
《华北水利水电大学学报(自然科学版)》
北大核心
2025年第5期43-52,共10页
Journal of North China University of Water Resources and Electric Power:Natural Science Edition
基金
国家重点研发计划项目(2021YFC3090102,2021YFC3090104)
国家自然科学基金项目(52192672)。
关键词
抽水蓄能电站大坝
大水位变幅
蓄水运行初期
工作性态
安全分析
pumped storage power station dam
large water level variations
initial impoundment stage
working performance
safety analysis
