初始含水率和掺砂量对吹填土沉降的影响

doi:10.12066/j.issn.1007-2861.1798

Abstract

Abstract:

Dredger fill settlement is a nonlinear process. The initial water content and sand content have direct effects on it. This research is carried out by settlement experiments on gravity settling characteristics. The effects of initial water content and sand content are analyzed. The settlement process is divided into three phases in which dredger fill's amount of settlement, settlement rate, void ratio and water content are analyzed. The results show that dredger fill with higher initial water content has more settling velocity, and settlement retard point appears earlier. After a settlement retard point appears, the amount of settlement becomes fewer. With lower initial water content, self-weight consolidation begins earlier, and the settlement retard point appears later. Sand content has less effect on the earlier settlement process, but has more effects on settlement in the consolidation stage. Sand content has little effects on dredger fill with high initial water content.

Key words: dredger fill, settlement process, settlement mechanism, initial water content, sand content

CLC Number:

TU449

WU Yajun, WEI Xing, TANG Jing. Effects of initial water content and sand content on dredger fill settlement[J]. Journal of Shanghai University（Natural Science Edition）, 2018, 24(2): 278-286.

Figures/Tables 10

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References 14

[1]	Richardson J F, Zaki W N. The sediment of suspension of uniform spheres under conditions of viscous flow[J]. Chemical Engineering Science, 1954(8):65-73.
[2]	Been K, Sills G C. Self-weight consolidation of soft soils: an experimental and theoretical study[J]. Geotechnique, 1981,31(4):519-535.
[3]	周华君, 任汝述. 长江口粘性细颗粒泥沙沉降规律[J]. 重庆交通学院学报, 1994,13(3):10-16.
[4]	刘莹, 肖树芳, 王清. 吹填土室内模拟试验研究[J]. 岩土力学, 2004,25(4):518-521.
[5]	詹良通, 童军, 徐洁. 吹填土自重沉积固结特性试验研究[J]. 水利学报, 2008,39(2):201-205.
[6]	杨爱武, 杜东菊, 赵瑞斌, 等. 吹填泥浆沉积模拟试验研究[J]. 辽宁工程技术大学学报(自然科学版), 2010,29(4):617-620.
[7]	何洪涛, 朱伟, 张春雷, 等. 分层抽取法在泥沙沉积过程中的应用研究[J]. 岩土力学, 2011,32(8):2371-2378.
[8]	张楠, 朱伟, 王亮, 等. 吹填泥浆中土颗粒沉降-固结规律研究[J]. 岩土力学, 2013,36(4):1681-1686.
[9]	中华人民共和国水利部. GB/T 50123—1999 土工试验方法标准 [S]. 北京: 中国计划出版社, 1999.
[10]	万远扬, 吴华林, 沈淇, 等. 长江口悬沙沉速室内试验研究[J]. 海洋科学, 2015,39(8):78-85.
[11]	刘林双, 杨国录, 王党伟, 等. 淤泥絮凝沉降中清浑界面沉速计算[C]// 河湖水生态水环境专题论坛. 2011: 114-130.
[12]	王维, 李绍武. 黏性泥沙絮网结构形成过程研究[J]. 泥沙研究, 2014(1):68-73.
[13]	郑邦民, 夏军强. 固体颗粒的群体沉降速度分析[J]. 泥沙研究, 2004(6):40-45.
[14]	He H T, Zhu W, Zhang C L. Experimental study on effects of initial water content on sediment deposition process [C]//Intelligent Information Technology Application Association. 2011: 71-74.

Effects of initial water content and sand content on dredger fill settlement

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