人民黄河Issue(10)：48-51,4.DOI:10.3969/j.issn.1000-1379.2014.10.015
堰塞坝溃决特征和机理的试验研究
Experimental Study on the Character and Mechanism of Dam-Break
摘要
Abstract
A large number of dams are induced by the earthquake in the debris flow gully within the earthquake area during the Wenchuan earth-quake. These dams will be broken by flood and form debris flows easily. It is very important to studied the critical condition of dam-break. This pa-per studied on the critical discharge of dam-break of different particle distribution,and the discharge of downstream of dam by the experiments of critical broken of no compactness dam. The main results are as follows:a)The critical discharge increases with the increasing of the middle grain size of particle D50;When the D50 is the same,the critical discharge decreases with the increasing of asymmetrical coefficient Cu ,and the critical discharge is a constant when Cu > 50. These results are obtained from the experiments of without broken mouth;b)In the upstream flow is only reservoir water outburst after the flow of small number of cases,burst after the peak flow is mainly composed of reservoir water decision.关键词
堰塞体/水槽试验/溃决过程/颗粒级配/不均匀系数Key words
barrier dam/flume experiment/breaching process/particle distribution/Cu分类
建筑与水利引用本文复制引用
张健楠,余斌,张惠惠..堰塞坝溃决特征和机理的试验研究[J].人民黄河,2014,(10):48-51,4.基金项目
国家自然科学基金资助项目（41372366）。 （）
