| 摘要: |
| 丁坝的回流长度是反映丁坝作用强度的重要指标．根据水槽试验数据和数学模型计算结果，分析了丁坝回流长度随丁坝附近河床发展过程的变化以及丁坝的相对回流长度与相对河宽的关系，随着丁坝局部冲刷坑的形成，丁坝回流长度明显减小，丁坝的相对回流长度随相对河宽的增大而减小。 |
| 关键词: 丁坝 局部冲刷 河床 水槽试验 回流 长度 指标 |
| DOI： |
| 分类号:TV863 U617 |
| 基金项目: |
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| Variation of re-circulation length of spur dikes |
|
HAN Yu-fang,CHEN Zhi-chang
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| Abstract: |
| The length of re-circulation is an important index for design of spur dikes. Based on the data of flume tests and calculation results of mathematic models, the scouring processes of riverbed and the relationship between the relative length of re-circulation and the relative width of river are analyzed. The length of re-circulation decreases rapidly with the development of the scour hole, and the relative length of re-circulation decreases with the increase of the relative width of river. |
| Key words: spur dike,length of re-circulation,relative length of re-circulation,scour hole,relative width of river, |
