西北水电Issue(1)：58-70,13.DOI:10.3969/j.issn.1006-2610.2025.01.008
上游来流与颗粒级配耦合作用对崩滑型堰塞坝溃决模式和洪水特征的影响研究
Study on the Influence of the Coupling Effect of Upstream Inflow and Grain Size Distribution on the Failure Mode of Landslide-induced Dammed Lake Dams and the Characteristics of Outburst Floods
摘要
Abstract
In order to explore the combined effects of upstream inflow and particle gradation on the failure modes of landslide dams and the characteristics of the outburst floods caused by the dam failures,12 sets of model tests with different upstream inflows and particle gradations were conducted.Four failure modes and processes,namely piping-seepage equilibrium,sliding-overtopping-progressive failure,overtopping-piping-rapid failure,and overtopping,were expounded,and the variation characteristics of the pore water pressure and water content inside the dam body during the dam failure process were analyzed.The results show that with the increase of the upstream inflow,its proportion in the peak flow gradually increases,and the arrival time of the peak flow is advanced.When the upstream inflow is 1.5 L/s,the influence of the grain size distribution on the dam failure mode is weak,and all are overtopping failures,and the peak flow is inversely proportional to the median particle size.When the upstream inflow is 0.3 L/s,the grain size distribution affects the seepage characteristics of the dam body,thus affecting the instability mechanism of the dam body,and then leading to different dam failure modes.The peak flow is positively correla-ted with the seepage degree of the dam body.According to the characteristics of the grain size distribution,the dam body materials can be di-vided into coarse-grained controlled structure,balanced structure,mosaic structure,and fine-grained controlled structure.关键词
堰塞坝/溃决洪水/颗粒级配/上游来流Key words
Dammed Lake Dam/Outburst Flood/Grain Size Distribution/Upstream Inflow分类
水利科学引用本文复制引用
温瑞祥,朱兴华,李哲丞,时小飞,董晨阳..上游来流与颗粒级配耦合作用对崩滑型堰塞坝溃决模式和洪水特征的影响研究[J].西北水电,2025,(1):58-70,13.基金项目
国家自然科学基金(42090053,42377163) （42090053,42377163）
陕西省重点研发项目(2023-ZDLSF-61) （2023-ZDLSF-61）
浙江省安全工程与技术研究重点实验室资助项目(202104) （202104）
