干容重对粘性淤积物起动和冲刷的影响  

Influence of dry bulk density on incipient motion and erosion of cohesive deposits

作　　者：舒彩文[1] 王军[1] 谈广鸣[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2007年第1期25-28,共4页Engineering Journal of Wuhan University

基　　金：高等学校博士学科点专项科研基金项目(编号:20050486007);国家重点基础研究项目(编号:2003CB415200);国家自然科学基金项目(编号:50679064)

摘　　要：根据粘性淤积物的本质特性,从粘性淤积物起动机理入手,结合粘性泥沙起动与土力学粘性土边坡滑动的相似性,建立相应的微观起动模式,通过理论分析辅以试验资料,分别研究干容重对粘性淤积物临界起动切应力、起动流速以及冲刷率的影响.研究结果表明:干容重对粘性淤积物起动和冲刷的影响非常大.Based on the essential characteristic of cohesive deposits, from the motion mechanism of cohesive deposits to start with, the motion mechanism of cohesive deposits and the similarity between the cohesive sediment starting and the cohesive soil slope sliding failure in soil mechanics, firstly the corresponding microcosmic motion pattern, is establishing; and then through theoretical analysis and supplement with testing information, the cohesive deposits critical motion shear stress, erodes velocity of flow as well as erode rate, which influence by dry density, are studied. The research results show that the in- cipient motion and the erosion of cohesive deposits are greatly influenced by the dry bulk density.

关 键 词：粘性淤积物 干容重 起动流速 冲刷率 

分 类 号：TV142[水利工程—水力学及河流动力学]