长江科学院院报2016，Vol.33Issue(2)：38-41,47,5.DOI:10.11988/ckyyb.20140806
土石坝漫顶溃决模式与溃坝参数预测
Impact of Overtopping Breach Mode on Dam-break Parameters of Homogeneous Earth-rock Dams
摘要
Abstract
In order to simulate overtopping breach of homogeneous earth⁃rock dams, we carried out experiment in water tank using sand and clay to make mixed materials for dam, and discussed the impact of overtopping breach mode on dam⁃break parameters. We divided the overtopping breach modes into three kinds: erosion and scour of scarp( M1) , erosion and collapse of shear ( M2) and erosion and collapse of soak ( M3) . In the presence of given capacity of reservoir and dam height, maximum breach discharges (Qp) of different modes are obviously unequal, and Qp of M2 is the biggest. Breach Critical time( TC ) is referred to as the time from the beginning of overtopping to the developing of breach, and TC of M2 is the smallest, followed by that of M1 and M3. Breach mode depicts the effects of overtopping flow, initial breach, dam height and dam materials on dam⁃break process. Besides dam height and capacity of reservoir, breach mode is another important factor for dam⁃break prediction and disaster assessment.关键词
土石坝/漫顶溃决/破坏模式/溃决参数/灾害评估Key words
earth-rock dam/overtopping breach/breach mode/parameters of breach/disaster assessment分类
建筑与水利引用本文复制引用
罗优,陈立,平妍容,周敏..土石坝漫顶溃决模式与溃坝参数预测[J].长江科学院院报,2016,33(2):38-41,47,5.基金项目
国家自然科学基金项目 （）
