水利学报2012，Vol.43Issue(2)：241-245,5.
土石坝溃坝离心模型试验系统研制及应用
Development and application of centrifugal model test system for break of earth-rock dams
摘要
Abstract
A centrifugal model test system is successfully developed for the study of the break of earth-rock dams. A rotational water-supply ring is fixed to ensure adequate water amount for simulating scouring flow against the dam body in the test under accelerated velocity conditions. Advanced data measuring methods and image capturing devices are used to capture in multiple directions the images of overall dam break processes under accelerated velocity and mud flow conditions. A model dam with height 32cm is used to simulate the overtopping failure of 3 homogeneous earth-rock dams. The mechanism of the dam break is clearly revealied, and the effect of dam height on the dam break and the hydrograph of flood flow is investigated. The results show that the higher the dam is, the greater the longitudinal downward cuting and the side slope collapse of the break are, the steeper the curve of the hydrograph of flood flow at the break is, the faster the peak flow discharge develops and the earlier the peak flow reaches its maximum amount, the shorter the duration of dam break becomes. As a result, the more serious the damage caused by the break will be.关键词
溃坝离心模型试验系统/均质土石坝/漫顶破坏/离心模型试验Key words
centrifugal model test system/homogeneous earth-rock dam/overtopping failure/centrifugalmodel test分类
建筑与水利引用本文复制引用
陈生水,徐光明,钟启明,顾行文..土石坝溃坝离心模型试验系统研制及应用[J].水利学报,2012,43(2):241-245,5.基金项目
国家重点基础研究发展计划（973计划） （）
国家自然科学基金项目 （）
水利部公益性行业科研专项经费项目 （）
“十一五”国家科技支撑计划项目 （）
