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

作　　者：李楠 谭龙金[1] 廖海梅[1] LI Nan;TAN Long-jin;LIAO Hai-mei(College of Civil Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学土木工程学院,贵州贵阳550025

出　　处：《兰州文理学院学报(自然科学版)》2025年第1期78-83,共6页Journal of Lanzhou University of Arts and Science(Natural Sciences)

基　　金：国家自然科学青年基金项目(42107189)。

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.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 rolling 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 sediment particles.Based on force analysis of the sediment particles on slope,the computing vertical 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 agreement 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 

分 类 号：TV142[水利工程—水力学及河流动力学]