摘要
本文选用粒径为0.05-25.0mm的天然沙,在长16m,宽0.3m,深0.4m的变坡玻璃水槽中进行了3种级配的14组次粗化层形成和连续破坏的试验。在前人研究基础上,根据试验观察和泥沙起动判别条件,将普动作为粗化层破坏的判别条件。在分析试验资料的基础上,初步探讨了粗化层破坏的机理,得到了粗化层破坏的初步水流条件,发现粗化层破坏流速与一般泥沙起动流速不同,粗化层越粗,破坏流速越大。
In this paper, natural sands with grain size range of 0.05 - 25.0mm are used in this experiment. The experiments are performed in a glass flume with different bed Slope and length of 16m and width of 0.3m and depth of 0.4m. Fourteen sets with three kinds of size-distributions are performed in the experiments of armoring layer continuous damage. Based on previous studies, experiment phenomenon and the standard of incipient motion, the general movement judgment condition is adapted as the criterion of armoring layer damage. Mechanism of armoring layer damage is preliminary studied, the result of flow condition of armoring layer damage is obtained. It shows that the flow velocity of armoring layer damage is different from general incipient velocity of sediment.
出处
《水力发电学报》
EI
CSCD
北大核心
2008年第3期115-119,共5页
Journal of Hydroelectric Engineering
基金
云南省学术技术后备人才基金(2005PY01-34)
国家自然基金(50579040,50409003,50769001)
关键词
河流泥沙工程学
粗化层
破坏
水槽试验
流速
river sediment engineering
armoring layer
damage
flume experiment
flow velocity
