粘性泥沙淤后起动流速试验研究  

Study on the Incipient Motion Velocity of Cohesive Sediment After Deposition and Consolidation

作　　者：吕平[1] 谈广鸣[1] 王军[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,武汉430072

出　　处：《中国农村水利水电》2008年第2期56-58,共3页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(50679064);高等学校博士学科点专项科研基金项目(20050486007)

摘　　要：粘性泥沙起动机理不同于非粘性泥沙,它与淤积条件有关,并受泥沙内部物质组成因素影响。通过粘性泥沙淤后起动试验,研究其起动流速与泥沙干容重、粘性颗粒含量之间变化关系,指出粘性泥沙起动流速随着泥沙干容重、粘性颗粒含量增大而增大,之后由试验数据率定出粘性泥沙起动流速经验公式,并用王兆印的试验资料进行了验证。The incipient motion and scour mechanism of cohesive sediment is different from the one of non-cohesive sediment, ancl it is related to the conditions of deposition and influenced by the composition of sediment. Through a series of experiments on incipient motions after deposition and consolidation, the relationships between cohesive sediment incipient motion velocity and sediment dry density, cohesive sediment content under conditions of deposition and consolidation are studied, and conclusion that the cohesive sediment incipient motion velocity will increase with the sediment dry density and cohesive sediment content. Moreover, an empirical formula Of cohesive sediment incipient motion velocity is given out here according to the experiments data, and is verified by Wang Zhao-ying＇s experiment data.

关 键 词：粘性泥沙 淤积 干容重 粘性颗粒含量 起动流速 

分 类 号：TV141.2[水利工程—水力学及河流动力学]