岩土工程学报2025，Vol.47Issue(10)：2036-2044,9.DOI:10.11779/CJGE20241046
混凝土面板堆石坝漫顶溃坝机理研究
Study on overtopping-induced breach mechanisms of concrete-face rockfill dams
摘要
Abstract
Overtopping failure of concrete-face rockfill dams involves a complex water-soil-structure coupling mechanism.Through flume model experiments and based on the theories and methods of water-sand dynamics,soil mechanics,and material mechanics,this study investigates the development process of the dam body's breach in both the longitudinal and slope surface directions during the overtopping failure of concrete-face rockfill dams.It also reveals the evolution mechanisms of breach morphology and breach hydrograph.In general,the overtopping failure of a concrete-face rockfill dam is a coupled process that includes continuous erosion of rockfill materials,intermittent instability of the breach slope,and multiple fractures of the suspended face slabs.In the longitudinal direction,under the action of overtopping flow,the breach development in the rockfill materials mainly undergoes tail cutting of the breach,head-cut retrogressive erosion,side slope collapse,full cross-section erosion,upstream erosion and downstream deposition,and river bed stabilization,accompanied by intermittent fractures of the face slabs.In the cross-sectional direction,the breach process is primarily characterized by retrogressive erosion,lateral erosion,and instability of the breach side slope,ultimately resulting in a splayed breach.The intermittent fractures of the suspended face slabs,caused by the continuous expansion of the breach size,lead to the multi-peak characteristics of the breach hydrograph,with the peak values serving as important indicators for assessing the primary and secondary degrees of failure.关键词
混凝土面板堆石坝/漫顶溃坝/堆石料冲蚀/面板折断/溃坝机理Key words
concrete-face rockfill dam/overtopping-induced dam breach/erosion of rockfill materials/fracture of face slab/dam breach mechanisms分类
建筑与水利引用本文复制引用
赵鲲鹏,陈生水,钟启明,邓曌,宋智通..混凝土面板堆石坝漫顶溃坝机理研究[J].岩土工程学报,2025,47(10):2036-2044,9.基金项目
国家自然科学基金项目(U22A20602,52109094) （U22A20602,52109094）
江苏省卓越博士后基金项目(2024ZB613) （2024ZB613）
中央级公益性科研院所基本科研业务费专项资金项目(Y324004,Y324006) （Y324004,Y324006）
中国博士后科学基金第 18 批特别资助项目(2025T180866)This work was supported by Key Program of National Natural Science Foundation of China(Grant Nos.U22A20602,52109094),Jiangsu Excellent Postdoctoral Fellowship(Grant No.2024ZB613),Fundamental Research Funds for Central Public Welfare Research Institutes(Grant Nos.Y324004,Y324006),The 18th Batch of Special Funding from the China Postdoctoral Science Foundation(Grant No.2025T180866). （2025T180866）
