泥沙研究2025，Vol.50Issue(2)：17-24,8.DOI:10.16239/j.cnki.0468-155x.2025.02.003
级配和盐度对细颗粒泥沙沉降结构浓度影响试验研究
Experimental study on the structural density with the influence of sediment gradation and salinity
摘要
Abstract
By changing the salinity and sediment gradation of the samples from industrial kaolinite and sedi-ment collected from Jiangsu coast,the effects of salinity and sediment gradation on the structural density were experimental studied systematically.The results show that the increase of salinity triggers the kaolinite particles to aggregate into flocs with larger size and higher porosity,the bulk settling velocity to increase,and the struc-tural density to decrease.When the salinity increases to 18‰ or even higher,the structural density tends to be stable.When the median particle size of the sediment sample decreases,the content of viscous fine particles increases,the setting mode gradually changes from single particle settling to floc settling,and the sedimenta-tion rate decreases.In general,the structural density decreases with the decrease of the median particle size,and the composition of the particle less than 8 μm has an important impact on the structural density.Finally,the empirical formula of the structural density is established with the parameters of salinity,the median particle size and the composition of the particle less than 8 μm.关键词
盐度/泥沙级配/制约沉降/结构浓度Key words
salinity/sediment gradation/hindered settling/structural density分类
水利科学引用本文复制引用
何哲遵,许春阳,尧印鹏,陈永平..级配和盐度对细颗粒泥沙沉降结构浓度影响试验研究[J].泥沙研究,2025,50(2):17-24,8.基金项目
国家重点研发计划项目(2023YFC3008100) （2023YFC3008100）
国家自然科学基金面上项目(42376171) （42376171）
中央高校基本科研业务费专项(B230201047) （B230201047）
国际(地区)合作与交流项目(W2421060) （地区）
