【摘要】 利用黄骅港海域床面表层泥沙进行不同颗粒级配的粉沙类泥沙静水沉降试验 ,揭示粉沙群体中不同粒径组分的分选沉降现象 ,给出不同颗粒级配泥沙在不同含沙量情况下沉降泥沙质量随时间的变化曲线 ,提出不同百分比沉降质量的代表沉速概念 ,给出黄骅港不同级配泥沙的代表沉速 ,指出粉沙类泥沙回淤问题的物模或数模研究需要根据实际情况合理选取代表沉速更多还原

【Abstract】 Using sediments from seabed surface around Huanghua Harbour, the settling experiments of silt-type sediment with different particle diameter distributions in still water are carried out. The sorting-settling phenomena of graded sediment fractions is disclosed. The change curves of depositedsediment mass with time, at the cases of different grade distributions and different concentrations are presented. The representative settling velocities corresponding to different deposited sediment mass percent are defined, and the representative settling velocities of Huanghua Harbour sediments with different grade distributions are presented. It is pointed out that the proper settling velocity should be chosen in the physical and numerical model study on siltation problem for silt-type sediment.更多还原