水利水电科技进展2011，Vol.31Issue(1)：11-14,4.DOI:10.3880/j.issn.1006-7647.2011.01.003
松散及弱固结堰塞体溃坝形式与流量过程
Outburst patterns and discharge process for weakly consolidated and loose barrier dams
摘要
Abstract
In order to study different outburst patterns of weakly consolidated and loose barrier dams, the outburst experiments on loose and weakly consolidated dams under natural overflows in the disaster area of Wenchuan Earthquake in Sichuan Province were carried out. The analytic results of discharge process and outburst patterns of barrier dams show that, compared with those of the loose barrier darn, the fluctuation of outburst discharge of the weakly consolidated dam is weaker and the outburst discharge is smaller. The breaches are wide-deep and narrow-deep patterns for loose and weakly consolidated dams, respectively. The forces to erode the barrier dams and to result in breaches mainly include the shear stress τv induced by uneven distribution of water velocity and the headcut shear stress τe resulted from the circulation of water at the headcut. The headcut shear stress τe is dominant, and the barrier dams will reach the erosion equilibrium when the headcut shear stress τe is equal to the critical stress of the barrier dams.关键词
松散堰塞体/弱固结堰塞体/溃坝流量/堰塞体溃决形式分类
建筑与水利引用本文复制引用
邓明枫,陈宁生,胡桂胜,邓虎,任海若..松散及弱固结堰塞体溃坝形式与流量过程[J].水利水电科技进展,2011,31(1):11-14,4.基金项目
"十一五"国家科技支撑计划(2008BAB2B06) （2008BAB2B06）
四川省科技支撑计划(2008SZ0156) （2008SZ0156）
