混凝土重力坝实测坝基渗流性态分析  

Analysis on foundation seepage behavior of concrete gravity dam

作　　者：许雷 曾超 刘慧 XU Lei;ZENG Chao;LIU Hui(Large Dam Safety Supervision Center,National Energy Administration)

机构地区：[1]国家能源局大坝安全监察中心,浙江杭州311122 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《大坝与安全》2025年第1期42-46,共5页Dam & Safety

基　　金：国家重点研发计划项目课题(2021YFC3090102)。

摘　　要：坝基扬压力和渗流量是混凝土重力坝坝基渗流性态最直观的反映。为了总结运行期重力坝坝基扬压力和渗流量的一般性规律,对我国电力行业主要混凝土重力坝实测资料进行分析研究。研究结果表明:坝基局部渗压系数超过设计值是比较常见的现象,但经复核计算,由于设计时安全裕度较大,坝基抗滑稳定安全性仍能满足规范要求,正常情况下坝基渗流量不大于5.0 L/s,不同工程坝基渗流量与地质条件、渗控效果、地震等因素密切相关,但与坝高、坝顶长度之间的相关性不明显。研究成果可为混凝土重力坝监测资料分析及坝基渗流安全性评价提供一定参考。The uplift pressure and seepage volume are the most intuitive reflection of the foundation seepage behavior of concrete gravity dam.To get the general variation of the foundation uplift pressure and seepage volume of the gravity dam during operation period,the monitoring data of the main concrete gravity dams in domestic power industry are analyzed.The results show that it is a common phenomenon that the uplift pressure coefficient of partial foundation of the gravity dam exceeds the design value.However,due to the large safety margin in design,the anti-sliding stability of dam foundation could still meet the specification requirements in review and calculation.Under normal conditions,the foundation seepage volume of gravity dam is not greater than 5.0 L/s.The seepage flow of dam foundation of different projects is closely related to geological conditions,seepage control effect and earthquake,but has a weak correlation with dam height or dam crest length.The study results could provide some reference for monitoring data analysis and seepage safety evaluation of concrete gravity dams.

关 键 词：坝基扬压力 混凝土重力坝 渗流 监测资料分析 

分 类 号：TV698.1[水利工程—水利水电工程]