泥石流排导槽磨蚀行为特征研究

磨蚀损坏是泥石流排导槽失效的重要诱因之一.对排导槽底面受泥石流冲刷而产生磨蚀的研究现状进行总结,并基于摩擦磨损理论分析排导槽的磨蚀系统特征,以期促进泥石流排导槽磨蚀损坏的机理研究及抗磨蚀结构的研发应用.通过泥石流排导槽磨蚀的野外现象考察和理论分析,总结了磨蚀系统构成、磨蚀影响因素、磨蚀形貌和磨蚀行为特征.结果表明,泥石...

Study on the Characteristics of Abrasion Behavior of Debris Flow Drainage Channel

Abrasion damage is one of the important failure causes of debris flow drainage channel,which seriously affects the normal operation life and health status of the drainage channel.Based on the theory of friction and wear,the abrasion system and behavior characteristics of the drainage channel is analyzed,in order to promote the research on the mechanism of abrasion damage and the development and application of anti-wear structure.Based on the field investigation and theoretical analysis of the abrasion of debris flow drainage channel,the composition of the abrasion system,the affecting factors,the wear morphology and the characteristics of abrasion behavior are summarized.The results show that the abrasion surface of debris flow drainage channel is a complex multi-phase system,involving many factors,which is in line with the tribology system characteristics of system dependence,time dependence and multidisciplinary coupling.The factors affecting the abrasion are divided into two categories:the abrasion ability of debris flow and the anti-wear ability of drainage channel,including bulk density,velocity,particle composition,mud depth and rheological parameters,flow pattern parameters,flow duration,cross-section type of channel structure,strength of lining material,aggregate gradation and hardness,etc..The wear morphology can be summarized into four categories:layered peeling,furrow cutting groove,“pot hole”erosion pit and rib sill top erosion.