摘要
泥石流对砼防治结构的磨损是泥石流研究极其薄弱的环节,泥石流磨损大大缩短了防治结构的有效使用年限· 作为大型特大型公路泥石流有效防治结构的速流结构,因泥石流的磨损使其有效使用寿命缩短了近三分之一· 基于泥石流两相流流速计算理论,研究了泥石流对速流结构的磨损机理,包括均质浆体对速流槽的磨蚀机理和固相颗粒对速流槽的切削机理;基于牛顿运动原理建立了泥石流液相浆体及固相颗粒的磨损动力学方程;运用量纲分析法构建了速流槽磨损量计算式。
As one weak topic in research of debris flow,abrasion of debris flow shortens obviously application life of control structure composed of concrete.High_speed drainage structure,one of the most effective techniques to control giant debris flow disaster,has shortened one_third application life due to abrasion by debris flow.Based on velocity calculation method founded by two_phase theory,research of abrasion mechanism of debris flow to high_speed drainage structure was made.The mechanism includes both abrasion mechanism of homogeneous sizing and shearing mechanism of particle of debris flow to high_speed drainage trough structure.Further abrasion equations of both sizing and particle were established by Newton movement theory of debris flow.And abrasion amount formula of the high_speed drainage trough structure is set up by dimensional analysis.Amount to calculating in the formula is consistent with testing data in_situ,which is valuable in design of high_speed drainage structure.
出处
《应用数学和力学》
EI
CSCD
北大核心
2004年第11期1150-1156,共7页
Applied Mathematics and Mechanics
基金
交通部重点科技基金资助项目(95060233)
交通部跨世纪人才专项基金资助项目(95050508)
高等学校重点实验室访问学者基金资助项目
国家十五科技攻关资助项目(2001BA604A023)
关键词
泥石流
两相流
速流结构
磨损作用
磨损量
debris flow
two-phase liquid
high-speed drainage structure
abrasion
abrasion amount
