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| 不同底坡的均匀沙起动条件 |
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何文社1,曹叔尤2,刘兴年2,杨具瑞2
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1. 兰州交通大学,甘肃兰州,730070;四川大学高速水力学国家重点实验室,四川成都,610065
2. 兰州交通大学,甘肃兰州,730070
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| 摘要: |
| 在讨论了床面均匀沙颗粒起动标准、起动概率及隐暴度的基础上，采用泥沙滚动平衡模式推导了不同底坡的均匀沙起动条件，并给出了起动切应力计算式中参数的取值。经验证，由起动切应力转化为起动流速的计算结果与试验实测值较为吻合。 |
| 关键词: 底坡 起动条件 均匀沙 泥沙滚动 起动流速 |
| DOI： |
| 分类号:TV142.1 |
| 基金项目:国家自然科学基金资助项目(50279024);教育部博士点基金资助(2002-173) |
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| Incipient condition of uniform sediment on different bed slopes |
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HE Wen-she,CAO Shu-you,LIU Xing-nian,YANG Ju-rui
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| Abstract: |
| Based on the analysis of the incipient standard, incipient probability and exposure degree of the uniform particles lying on the surface of the river bed, the formulas to calculate the incipient condition of uniform grains on different bed slopes are put forward by using the rolling balance mode, and the calculation parameters of incipient shear stress are presented. The comparison results show that the calculated values of the incipient velocity transforming from the incipient shear stress are in good agreement with those of experimental measurement. |
| Key words: bed slope,incipient condition,uniform sediment |
