吹填层厚度对疏浚淤泥沉积特性影响的试验研究  

Experimental study on effect of hydraulic fill thickness on sedimentation characteristic of dredged slurry

作　　者：张莹 徐桂中[2] 卢亮 周源[4] ZHANG Ying;XU Gui-zhong;LU Liang;ZHOU Yuan(Nanjing Vocational University of Industry Technology,Nanjing 210023,China;Yancheng Institute of Technology,Yancheng 221051,China;Nanjing Nanda Geotechnical Engineering Co.,Ltd.,Nanjing 210000,China;Hohai University,Nanjing 210098,China)

机构地区：[1]南京工业职业技术大学,江苏南京210023 [2]盐城工学院,江苏盐城221051 [3]南京南大岩土工程技术有限公司,江苏南京210000 [4]河海大学,江苏南京210098

出　　处：《水运工程》2020年第11期57-62,共6页Port & Waterway Engineering

基　　金：国家自然科学基金青年基金资助项目(51809160);南京工业职业技术学院引进人才科研启动基金资助项目(YK17-06-01);南京工业职业技术学院科研基金项目(自然科学类)(YK18-06-01);南京市建设系统科研计划项目(Ks2040)。

摘　　要：疏浚泥向堆场内吹填的过程中,宜分层进行,吹填厚度的选择直接影响疏浚泥在堆场内的沉积。利用不同高度的沉降柱,对同一含水率的泥浆进行沉积试验,研究泥浆高度对于泥浆沉积规律的影响。结果表明,在相同初始含水率情况下,较低的泥浆高度易于使泥浆发生固结沉降,泥浆高度较高则易于发生阻碍沉降;泥浆高度对于阻碍沉降模式下沉降速率的影响较小,沉降阶段持续时间与泥浆高度呈正相关;泥浆高度越高,沉积物平均含水率越小,且随着泥浆高度的增加,沉积物平均含水率趋于稳定。在本次研究范围内,当泥浆高度达到40 cm以上,沉降速率和沉积物含水率趋于稳定,沉降模式不再发生变化,泥浆高度对沉积规律的影响较小。In the process of hydraulic filling,the dredged slurry should be filled in layers.The thickness of the layers is important to the consolidation of the dredged slurry.We use the settling columns with different height to carry out the settling experiments to the slurry with the same water content,and study the influence of dredged slurry height on the sedimentation law.The results show that with the same initial water content,the settling mode in a column with a lower slurry height tends to be consolidation settling,and the higher slurry height tends to be hindered settling.The initial height of the slurry has little influence on the settling rate when hindered settling occurs.The duration of the settling stage is proportional to the initial slurry height.The higher the slurry height is,the smaller the average water content of sediment is,and with the increase of slurry height,the average water content of sediment tends to be stable.When the slurry height is more than 40 cm in the scope of this study,the sedimentation rate and water content of sediment tend to be stable,and the settlement mode does not change any more.The slurry height has little effect on the sedimentation law.

关 键 词：疏浚淤泥 泥浆高度 沉积规律 沉降柱试验 

分 类 号：TV142.1[水利工程—水力学及河流动力学] U616[交通运输工程—船舶及航道工程]