水利水电科技进展2017，Vol.37Issue(3)：89-94,6.DOI:10.3880/j.issn.10067647.2017.03.015
堆场疏浚泥颗粒分选特性初步量化方法
Preliminary quantitative method for grain sorting behaviors of dredged slurries in reclaimed land
摘要
Abstract
In order to accurately evaluate the storage capacity of reclaimed land and reasonably select treatment technologies for dredged slurries, based on the theory of sediment transportation mechanics, dredged slurries are divided into three particle-size fractions:d < 0. 005 mm, 0. 005 mm≤d≤0. 01 mm, and d > 0. 01 mm. The variation of relative content for each particle-size fraction was analyzed, and it was determined that the main reason for grain sorting of dredged slurries is the relative movement of particle-size fractions d > 0. 01 mm and 0. 005 mm≤d≤0. 01mm. Using the sorting coefficient to quantify the significant degree of grain sorting of dredged slurries and the deviation coefficient to quantify the influence of grain composition of in situ mud on grain sorting, the relationships between the sorting coefficient and deviation coefficient and soil properties in reclaimed land were analyzed, and a preliminary quantitative method for grain sorting of dredged slurries in reclaimed land is proposed. The results show that the sorting coefficient decreases with the increase of the distance from the filling inlet and shows a power function distribution, and the significance of grain sorting decreases longitudinally. The sorting coefficient is at its maximum near the filling inlet, where grain sorting is remarkable and the particle-size difference is large. However, it is small near the water outlet, where grain sorting is unremarkable and particle-size distribution is uniform. The deviation coefficient decreases first and then increases longitudinally in reclaimed land, and shows a spoon-type distribution, showing that the soil properties in the forepart and posterior segment of reclaimed land are significantly different from those of in situ mud, but the soil properties in the middle segment of reclaimed land are similar to those of in situ mud. The longitudinal distributions of the sorting coefficient and deviation coefficient are strongly correlated with zoning of soil properties in reclaimed land.关键词
疏浚泥/颗粒分选/分选系数/偏离系数/量化方法/堆场Key words
dredged slurry/grain sorting/sorting coefficient/deviation coefficient/quantitative method/reclaimed land分类
建筑与水利引用本文复制引用
杨瑞敏,丁建文,周志彦,徐桂中,张远兵..堆场疏浚泥颗粒分选特性初步量化方法[J].水利水电科技进展,2017,37(3):89-94,6.基金项目
国家自然科学基金(51378118) （51378118）
水利部公益性行业科研专项(201401006) （201401006）
安徽科技学院重点学科建设项目(AKZDXK2015B01) （AKZDXK2015B01）
