摘要
从水流脉动的机理出发,以粘性土的宾汉应力作参数,建立了粘性土的临界起动剪切力公式。根据一系列实验结果,分析了不同情况下粘性土夹沙的起动条件,归纳出统一的表达式。此外,还对上部水流为浑水的情况下,粘性土及粘性土夹沙的起动条件作了定性分析。
The incipient motion of cohesive sediment and the mixture of cohesive sediment and coarse particle are researched systematically. On the basis of turbulent flow theory, a formula for determining the critical shear stress of cohesive sediment with the Bingham stress of cohesive sediment is ascertained. According to a series of experiments, the conditions of incipient motion for the mixture of cohesive sediment and coarse particle in different cases are discussed and formalized. The result of all above-mentioned formulae are in agreement with experiment data. In addition, a qualitative analysis about the conditions of incipient motion of cohesive sediment and the mixture of cohesive sediment, and coarse particles above which dense flow exists are carried out.
出处
《水科学进展》
EI
CAS
CSCD
1992年第4期271-278,共8页
Advances in Water Science
基金
国家自然科学基金
关键词
粘性土
夹沙
宾汉切应力
起动条件
cohesive sediment
the mixture of cohesive sediment and coarse particle
Bingham stress: incipient motion.
