| 余明辉,邓银玲,白 静.影响非黏性岸滩稳定坡度的机理研究[J].水利学报,2010,41(3): |
| 影响非黏性岸滩稳定坡度的机理研究 |
| Investigation on the mechanism of non- viscous bank stable slope |
| |
| DOI： |
| 中文关键词: 非黏性 稳定坡度 水流条件 影响机理 |
| 英文关键词: non- viscous bank stable slope flow condition influence mechanism |
| 基金项目: |
|
| 摘要点击次数: 2329 |
| 全文下载次数: 183 |
| 中文摘要: |
| 本文从稳定岸滩上非黏性颗粒在静水与动水中的受力分析出发，主要考虑颗粒物理特性及水流条件的影响，分析研究了岸坡稳定的机理，建立了动水中的岸滩稳定坡度与近底流速颗粒，粒径以及容重的函数关系式。基于不同情况下多组次的水槽试验结果，使用最小二乘法拟合出岸滩稳定坡度的经验表达式试验结果及拟合出的公式，反映了动水中非黏性颗粒组成的岸滩，稳定坡度小于静水中的岸滩稳定坡度，并随近底流速增大而减小，以及随粒径增大而增大的规律研究成果可以初步预测水流条件变化后河岸变形。 |
| 英文摘要: |
| Abstract:This paper presents a theoretical analysis and a laboratory flume experimental study on the
interaction of hydrodynamic conditions and non- viscous bank grain in both still and flowing water.
Considering forces acting on a non- viscous particle at a stable bank as well as its physical prop erties，a function has been established which indicates the relationship among the stable bank slop e，the velocity near bed，the square root of grain diameter and its unit gravity in flowing wate r. Besides，an empirical equation has been fitted to estimate stable bank slope by least square method based on experimental data. The results reveal that the non- viscous bank stable slope in flowing water is less than that in still water. Bank slope varies in step with the grain diameter but is inverse related to the flow velocity near the river bed. The results can be used to predict the river bank shape. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |