| 冲积河流粗化后的床面沙粒阻力 |
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| 引用本文： | 何文社,李昌志,季日臣,贡力.冲积河流粗化后的床面沙粒阻力[J].水利学报,2010,41(1). |
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| 作者姓名： | 何文社 李昌志 季日臣 贡力 |
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| 作者单位： | 1. 兰州交通大学,土木工程学院,甘肃,兰州,730070
2. 中国水利水电科学研究院,防洪抗旱减灾研究所,北京,100048 |
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| 基金项目： | 国家自然科学基金，兰州交通大学青蓝工程基金 |
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| 摘 要： | 通过理论分析提出了与泥沙起动水力条件及泥沙重度有关的泥沙等效粒径的概念及其计算方法,并在此基础上提出了一种计算粗化后床面沙粒粗糙尺度的简化公式,对其取值方法及区间进行了说明。该式表明床面上沙粒粗糙尺度不仅与泥沙颗粒的重度及水的重度有关,且与一定水流条件下形成粗化层时床面上泥沙颗粒的最大起动粒径有关。采用国内外70组天然河道及试验室实测资料,对本文提出的床面沙粒阻力计算公式进行了验证,结果表明该公式的计算精度令人满意。该公式可以用来计算冲积河流粗化后的床面沙粒阻力。
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| 关 键 词： | 阻力特性 沙粒阻力 冲积河床 粗化 |
Study on grain resistance of armored bed surface in alluvial river |
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| HE Wen-she.Study on grain resistance of armored bed surface in alluvial river[J].Journal of Hydraulic Engineering,2010,41(1). |
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| Authors: | HE Wen-she |
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| Affiliation: | HE Wen-she1,LI Chang-zhi2,JI Ri-chen1,GONG Li1(1.Lanzhou Jiaotong University,Lanzhou 730070,China,2.China Institute of Water Resources , Hydropower Research,Beijing 100048,China) |
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| Abstract: | Based on a theoretical analysis,a concept and a method have been advanced at first to calculate the equivalent grain size of sediment in this paper.Then,a simplified formula was developed to compute the magnitude of sand-grain roughness on an armored bed surface of alluvial river,and the approach and the range for sand-grain roughness were further discussed.The formula indicates that on an armored bed surface of alluvial river with a given hydraulic condition,the sand-grain roughness is closely related not ... |
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| Keywords: | resistance characteristics sand-grain resistance alluvial fiver fiver bed armoring |
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