STUDY OF INFLUENCE ON COHESIVE DEPOSITS INCIPIENT MOTION AND EROSION BY DRY BULK DENSITY
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 gliding failure in soil mechanics, firstly establishing the corresponding microcosmic motion pattern, then analyzing that dry bulk density is not only the main influence factor of the cohesive deposits critical motion shear stress,but also a function of (γ)3.25 and D. On the basis of the previous analyses, isolated factor method and Robets experiment datum are utilized to find the influence on the cohesive sediment critical motion shear stress by different dry bulk densities and different particle diameters and establish a corresponding formula concerning with critical motion shear stress. Thirdly, studying the influence of dry bulk density on the cohesive deposits incipient motion velocity which even full-face erodes and the erosion rate through theoretical analysis and experiment datum, establishing the corresponding formula, pointing out that there is 2.5-power relationship between incipient motion velocity of the even full-face erosion and the dry bulk density. The research results show that the incipient motion and the erosion of cohesive deposits are greatly influenced by the dry bulk density.
cohesive deposits dry bulk density incipient motion velocity erosion rate
Caiwen Shu Guangming Tan Jun Wang
State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University, Wuhan 4 State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University, Wnhan 4 Yangtze River Scientific Research Institute, Wuhan 430010, China
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
1131-1136
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）