泥沙颗粒水下休止角与内摩擦角差异化初步探索  

Preliminary exploration of difference between submarine angle of repose and internal friction angle of sediment particles

作　　者：孟震[1] 杨文俊[1] 

机构地区：[1]长江科学院水利部江湖治理与防洪重点实验室,湖北武汉430010

出　　处：《泥沙研究》2012年第4期76-80,共5页Journal of Sediment Research

基　　金：国家重点基础研究发展计划(973计划)资助课题(2007CB7141O6);国家自然科学基金资助项目(51079008);湖北省自然科学基金(2010CDB00201)

摘　　要：根据目前的泥沙起动及水下休止角的相关研究,得出滑动起动与滚动起动模型的矛盾,进而对泥沙界广泛认同的泥沙颗粒水下休止角在数值上等于泥沙颗粒水下内摩擦角提出质疑。本文分别进行了泥沙颗粒水下休止角与内摩擦角的物理试验。试验表明:作为散粒体,泥沙颗粒的水下休止角在数值上小于泥沙颗粒水下内摩擦角。The contradiction between slidable incipient model and rolling incipient model is obtained based on the relevant researches of incipient motion and submarine angle of repose.The doubt about the most basic understanding,which is ＂the submarine angle of repose is equal to the internal friction angle associated with sediment particles＂,is put forward.The research shows the submarine angle of repose is less than the internal friction angle of sediment particles via the physical experiments on submarine angle of repose and internal friction angle associated with sediment particles.

关 键 词：泥沙起动 休止角 内摩擦角 可动层 相对隐蔽度 

分 类 号：TV141[水利工程—水力学及河流动力学]