摘要
卵石起动流速是泥沙起动流速的一种特殊形式。国内许多专家学者对于既适用于散粒体又适用于黏性细颗粒的泥沙起动流速公式进行过大量研究,究竟哪一种公式更适合卵石起动流速的计算与应用尚无定论。为了探寻这些公式的合理性与实用性,依托水工模型试验水深测试值和理论值,对于一些常用的公式进行了分析计算,又利用防冲槽冲坑深度反算卵石的起动流速,并且将试验计算值与理论计算值以及冲深反算值进行对比,间接地得出了长科院公式在卵石起动流速计算与应用方面更具有实用性的结论,以及该公式适用卵石粒径的范围。
Pebble starting velocity is a special form of sediment starting velocity.Many experts and scholars have conducted a large number of studies on the starting velocity formula which is applicable to both loose particles and viscous fine particles,but there is still no final conclusion on which formula is more suitable for the pebble starting velocity.In order to explore the rationality and practicability of these formulas,we relied on the water depth test values of hydraulic model test and theoretical value to analyze and calculate some commonly used formulas,and used the anti-flushing groove depth to inversely deduce the starting velocity of the pebble.Then we compared the experimental calculation values,theoretical calculation values and the inversed deduced values of the scouring depth.The results showed that the formula of Changjiang River Scientific Research Institute was more practical in the calculation and application of the pebble starting velocity,and the range of the particle size of the pebble applicable to the formula was obtained.
作者
李江峰
LI Jiangfeng(Xinjiang Institute of Water Resources and Hydropower Research,Urumqi 830049,China)
出处
《人民长江》
北大核心
2021年第11期201-206,218,共7页
Yangtze River
基金
国家重点研发计划项目(2017YFC0405105)
新疆维吾尔自治区公益性科研院所基本科研业务经费资助项目“两种下游坡结构的防冲槽水流及冲刷特性研究”(KY2020071)。
关键词
卵石
起动流速
粒径范围
水工模型试验
pebble
starting velocity
range of the particle size
hydraulic model test
作者简介
李江峰,男,高级工程师,主要从事水利工程规划设计和水工模型试验的研究工作。E-mail:sgs_ljf@163.com。
