摘要
文章根据细颗粒泥沙起动特点 ,在坡面泥沙受力分析中 ,考虑了粘着力的作用 ,采用目前国内普遍使用的暴露度概念来反映非均匀沙的荫暴作用 ,将统计方法得到的暴露度引用到泥沙的起动公式中。采用滚动模式建立了坡面粘性非均匀泥沙的起动公式 ,并用试验资料进行了验证。通过试验资料验证的结果表明 ,在坡面粘性泥沙的起动中 ,考虑暴露度和粘性是合理的。
According to the incipient motion characteristic of the fine particle sediments,the binding power is one of the forces acting on the sediment,the idea of exposure degree is accepted in this paper to reflect the enclosed and exposed effect between sediments,and the exposure degree obtained by statistical method is used in the formula of incipient velocity of sediments.A formula for calculating the incipient motion of cohesion non-uniform sediment on sloping land is established by using the rolling mode and verified by experiment data.It shows that the calculated results are well agree with the experiment data,and the exposure degree of binding power acting on incipient motion of cohesion non-uniform sediment on sloping land is reasonable.
出处
《水力发电学报》
EI
CSCD
北大核心
2004年第3期102-106,共5页
Journal of Hydroelectric Engineering
基金
教育部科学技术研究重点项目 (2 0 0 3 0 3 0 2 )
长江三峡工程泥沙问题"九五"项目 (95 0 5 0 4 )
关键词
河流泥沙工程学
坡面泥沙起动
暴露度
非均匀沙
river sediment engineering
sediment incipient motion on sloping land
exposure degree
non-uniform sediment
