STUDY ON STARTING VELOCITY OF COHESIVE SEDIME-NTATION

1.　INTRODUCTIONIn recentdecades,many scholarshave proceeded the research on the sedimentstarting.It seems on the whole that there have been relatively effective formulas about cohesionlesssedimentation.Butbecause itisdifficultto determine the binding capacity among particlesofcohesive sedimentation,any quantitative analysis is short of sufficient data.Scholars usedvarious methods to determine the binding capacity among sediment particles.Since1 990 s,atthe Nanjing Hydraulic Research In…

STUDY ON STARTING VELOCITY OF COHESIVE SEDIMENTATION

In this paper, with the starting velocity experiments of natural cohesive sedimentation, the author pro poses an assumption concerning the starting mechanism of cohesive sedimentation and gives a formula to determine the starting velocity of compact c lay. It is pointed out that the fluctuating function of flow is a main factor fo r the starting of sedimentation. And the component and the structure of cohesive sedimentation are also the affecting factors for the starting. Consequently, th e study shows that modern results of soil mechanics, clay mineralogy and fluid m echanics are helpful in the investigation of this kind of engineering problem.