摘要
堤岸和路基的冲刷是水利、交通等部门所关注的问题,本文着重对堤岸、路基与水流正交情况下的冲刷进行了系统的试验研究和探讨。通过对堤岸、路基与水流正交情况下水流结构的观测分析,在单因素分析的基础上,运用量纲分析的方法,并借助于电子计算机进行优化、回归分析,提出了堤岸、路基与水流正交情况下最大冲深的计算模式。其模式结构简单、物理意义明确,基本上反映了堤岸、路基与水流正交情况下局部冲深的变化规律。对不同边坡系数m和具有护坦式基脚的防护建筑物的影响参数也作了有意义的探讨,并根据不同边坡系数m和不同护坦宽度L_s的试验结果进行分析,确定了边坡系数m和护坦宽度L_s影响的修正系数K_m和f(L_s/L_f)的计算模式以及较佳的取值范围。
A systematical experimental study of scour on the embankment and roadbed by perpendicular flow is presented in this paper. Based on the observation and analysis of flow structure, a formula to calculate the maximum scour depth is obtained by using single factor analysis dimensional analysis, regression and optimization with the help of a computer. The influence of slope coefficients m and protection structure with opron foot is analysed. A formula to calculate the correction coefficient Km and /(L0/L1), and their best ranges of values are obtained from experimental results.
出处
《水动力学研究与进展(A辑)》
CSCD
北大核心
1992年第3期287-294,共8页
Chinese Journal of Hydrodynamics
关键词
水流
正交
堤岸
路基
冲刷试验
turbid water scour, oblique axis helicodial flow, slope coefficient,apron width.