床面起伏影响下截流抛石稳定研究  

Research on stability of riprap influenced by boundary of riverbed during river closure

作　　者：钟登华[1] 毛寨汉[1] 

机构地区：[1]天津大学建工学院,天津300072

出　　处：《水力发电学报》2003年第1期83-88,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金资助项目 ( 50 1 790 2 3 )

摘　　要：本文从截流抛石在河床面上接触边界分析出发 ,引入相对暴露度Δ和倾斜度θ两个指标来描述抛投块石在床面的物理特征 ;其次 ,依据抛石稳定机理 ,建立稳定率模型 ,并采用随机模拟方法对某工程截流设计进行稳定性分析计算 ,从数据结果中概化出抛石稳定率与流速和粒径之间的关系。In this paper,the grazing boundary of riprap and riverbed is analysed.The opposite exposure level Δ and its degree of inclination θ are introduced to describe the physical character of the riprap on riverbed.According to the mechanism of the riprap losing stability,a stability model is established,and the stability of riprap at a closure project is calculated with the help of the stochastic simulation method.The relationship between the stability of riprap and the flow rate and grain size is summarized.

关 键 词：水工结构工程 抛石稳定 随机模型 截流 

分 类 号：TV322[水利工程—水工结构工程]