柱状珊瑚砂静水沉降试验研究  

Experimental study on settlement of rod coral sand in stagnant water

作　　者：蒋超 陈杰[1,2,3] 蒋昌波 姚震[1] 梁海 伍志元 Jiang Chao;Chen Jie;Jiang Changbo;Yao Zhen;Liang Hai;Wu Zhiyuan(School of Hydraulic and Environmental Engineering,Changsha University of Science&Technology,Changsha 410114,China;Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province,Changsha 410114,China;Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province,Changsha 410114,China)

机构地区：[1]长沙理工大学水利与环境工程学院,湖南长沙410114 [2]洞庭湖水环境治理与生态修复湖南省重点实验室,湖南长沙410114 [3]水沙科学与水灾害防治湖南省重点实验室,湖南长沙410114

出　　处：《海洋学报》2023年第4期57-67,共11页

基　　金：国家重点研发计划(2021YFB2601100);国家自然科学基金重点项目(51839002);国家自然科学基金面上项目(51979014,52271257);湖南省杰出青年科学基金项目(2022JJ10047)。

摘　　要：沉降速度是珊瑚砂的一个重要物理参数。由于柱状珊瑚砂与其他形状的珊瑚砂有着明显的差异,套用现有珊瑚砂的沉速公式进行计算并不合适。本文选取柱状珊瑚砂进行单颗粒沉降试验,研究静水中柱状珊瑚砂沉降速度及其影响因素,通过讨论分析不同的等效粒径和形状系数对柱状珊瑚砂沉降速度的影响,发现柱状珊瑚砂的沉降速度与等容粒径和Corey形状系数密切相关,基于本文试验数据推求了适用于计算柱状珊瑚砂沉降速度的经验公式,丰富了海岸泥沙理论。The settling velocity is an important physical parameter of coral sand.Because of the rod coral sand is obviously different from other shapes of coral sand,it is not suitable to apply the settling velocity formula of the existing coral sand for calculation.The rod coral sand was selected to study the settling velocity and its influencing factors for single particle settlement experiment in stagnant water in this study.By analyzing the effects of different equivalent particle sizes and shape coefficients on the settling velocity of rod coral sand,it is found that the settling velocity of rod coral sand is strongly correlated with the diameter of the volume-equivalent sphere and Corey shape coefficient.Based on the experimental data,an empirical formula suitable for calculating the settling velocity of rod coral sand is deduced,which enriches the theory of coastal sediment.

关 键 词：柱状珊瑚砂 沉降速度 阻力系数 形状系数 

分 类 号：P736.213[天文地球—海洋地质]