斜坡非均匀无黏性泥沙起动流速公式研究
Study on Incipient Velocity Formula of Non-uniform and Non-viscous Sediment Particles on Slope
李楠 1谭龙金 1廖海梅1
作者信息
- 1. 贵州大学土木工程学院,贵州贵阳 550025
- 折叠
摘要
为探究具有堰塞坝特征的大比降天然非均匀沙河道工程的泥沙颗粒起动流速,在前人基础上重新定义隐蔽度的概念,综合考虑泥沙颗粒的隐暴效应,采用滚动起动模式对斜坡上泥沙颗粒进行受力分析,建立斜坡非均匀无黏性泥沙颗粒的垂线平均流速公式.采用实测资料对该公式及前人总结出的公式进行检验,结果表明本文计算值与实测值吻合度更高,误差更小.
Abstract
In order to explore the problem of sediment particle starting flow rate of natural non-uniform sand channel project with large specific drop characteristic of landslide dam,the roll-ing start mode was adopted to redefine the concept of hidden degree,and comprehensively considered the hidden degree and exposure degree in the upstream and downstream of sedi-ment particles.Based on force analysis of the sediment particles on slope,the computing ver-tical mean velocity formula of non-uniform and non-viscous sediment particles on the slope were established.The results show that the calculated values in this paper are in better agree-ment with the measured values and the errors are smaller.
关键词
起动流速/滚动起动/无黏性泥沙/隐蔽度/暴露度Key words
incipient velocity/rolling start mode/non-viscous sediment/hidden degree/expo-sure degree引用本文复制引用
出版年
2025
NETL
NSTL
万方数据