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挑射水流对岩基河床冲刷的探讨
引用本文:刘沛清,冬俊瑞.挑射水流对岩基河床冲刷的探讨[J].长江科学院院报,1994,11(4):1-9.
作者姓名:刘沛清  冬俊瑞
作者单位:清华大学
摘    要: 在分析水垫塘中射流特征的基础上,综合了消能和射流的观点,提出一个估算冲坑深度的新公式。该公式结构简单、包括因素较全面,并通过分析计算实测资料,给出岩石冲刷系数的推荐值。利用该公式,对三峡大坝冲刷深度进行了预报,其预报值与各家的实验值符合较好。

关 键 词:挑流冲刷  冲刷深度  局部冲刷  经验公式

Investigation on Rock Bed Scour by Ski-Jump Water Jets
Liu Peiqing,Dong Junrui,Yu Changzhao.Investigation on Rock Bed Scour by Ski-Jump Water Jets[J].Journal of Yangtze River Scientific Research Institute,1994,11(4):1-9.
Authors:Liu Peiqing  Dong Junrui  Yu Changzhao
Abstract:n the basis of analyzing the property of water jet in the water cushion of scour pit,a newformula for estimation of scour depth is proposed by considering the concepts both of energy dissipationand of jet diffusion.This formula consists of more complete in fluence factors but is simple in form.The values of coefficient of scour invalved in the formula for various rocks are also proposed by theanalysis of many prototype data.The depth of scour pit downstream of the Three Gorges Dam isptedicted using the formula propored.The result is consistent with the experimental data by variousmodel tests.
Keywords:ski-jump jet erosion  depth  of scour pit  empirical formula for local scour
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