黄河口粉质土沉积物侵蚀性动态变化试验研究

单红仙; 郑杰文; 贾永刚; 张民生; 刘晓磊

黄河口粉质土沉积物侵蚀性动态变化试验研究

中国海洋大学环境科学与工程学院海洋环境与生态教育部重点实验室, 山东青岛 266100;中国海洋大学环境科学与工程学院, 山东青岛 266100

基金项目: 国家"八六三"课题资助(2008AA09Z109)

计量
- 文章访问数: 1232
- HTML全文浏览量: 16
- PDF下载量: 1071
- 被引次数: 0
出版历程
- 收稿日期: 2008-11-28
- 修回日期: 2009-04-10

Laboratory study about the influence of dynamic loading on the erosion of silty sediment in the Huanghe Estuary in China

Key Laboratory of Ministry of Education for Marine Environment & Ecology, College Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China

摘要

摘要: 通过一系列室内试验,研究了黄河口粉质类沉积物在循环动荷载作用后侵蚀性的变化.在试验中,采用真空预压固结装置制备重塑土样,采用液压伺服土动三轴试验机实现了不同幅值及不同振次的动荷载作用条件,并通过动三轴静态试验及贯入强度测试,测定了动荷载作用后土样强度的变化.通过水槽冲刷试验测试了不同条件的动荷载作用后,土样抗冲刷能力的变化,并进行了临界剪切应力的计算.试验结果表明:对于黄河口粉质类沉积物,动荷载作用后其强度及抗侵蚀性均降低;沉积物强度指标(不排水剪切强度、残余强度、贯入阻力)、侵蚀性指标(起动流速、临界剪切应力、冲刷率)与动荷载幅值、动荷载振次均呈现出较好的线性相关性.
- 粉质类土 /
- 侵蚀性 /
- 动态变化 /
- 模拟试验 /
- 黄河口
Abstract: In order to study the silty sediment erosion variety under the dynamic circulative loading,a series of indoor tests were processed.The rem oulded soil samples were prepared by the vacuum preloading.The dynamic loading,in different magnitudes and acting times,was exerted on the samples using the dynamic triaxial device.When the dynamic loading ended,the undrained shear strength and residual strength were continuo usly mensurated in the static test.The parallel samples were directly taken out from the dynamic triaxial device after dynamic loading for the penetration strength tested by the electronic digital display micropenet rometer.Then the scour experiments were carried out to mensurate the threshold velocity and the erosion rate.What is more,critical shear stress was calculated by the empirical equation.The results show that both an tierosio and strength of the silty soil are decreased after the dynamic loading action,and it is also found that the silty erosibility parameters of the threshold velocity and the erosion rate have a significant linear correlation with the dynamic loading conditions including the loading magnitude and acting times,and it is the same with the silty sediment strength parameters of the undrained shear strength,the residual strength and the penetration strength.
- silty soil /
- erosion characteristic /
- dynamic variety /
- simulating experiment /
- Huanghe Estuary in China

HTML全文

参考文献(30)

黄海军,樊辉.1976年黄河改道以来三角洲近岸区变化遥感监测[J].海洋与湖沼,2004,35(4):307-313.

LI G X,ZHUANG K,WEI He-long.Sedimentation in the Yellow River deltas Part Ⅲ.Seabed erosion and diapirism in the abandoned subaqueous delta lobe[J].Marine Geology,2000,168(1-4):129-144.

WANG H J,YANG Z S,LI G X.Wave climate modeling on the abandoned Huanghe(Yellow River) delta lobe and related deltaic erosion[J].Journal of Coastal Research,2006,22(4):906-918.

张世奇.黄河口及三角洲冲淤演变计算原理及方法[J].泥沙研究,1997,2:23-26.

赵东波.黄河三角洲刁口叶瓣海岸侵蚀的研究[D].青岛:中国海洋大学,2004,1-67.

陈沈良,张国安,陈小英,等.黄河三角洲飞雁滩海岸的侵蚀及机理[J].海洋地质与第四纪地质,2005,25(3):9-14.

LI G X,ZHUANG K L,WEI H L.Sedimentation in the Yellow River delta:Part Ⅰ.flow and suspended sediment structure in the upper distributary and the estuary[J].Marine Geology,1998,149(1-4):93-111.

单红仙.黄河水下三角洲表层工程地质环境动态变化研究[D].青岛:中国海洋大学,2003,1-209.

BLACK K S,TOLHURST T J,PATERSON D M,et al.Working with natural cohesive sediments[J].Journal ot Hydraulic Engineering,2002,128:1-7.

HJULSTROM Filip.Studies in the morphological activity of rivers as illustrated by the river Fyris[J].Bulletin of the Geological Institutions of the University of Uppsala,1935,25:221-528.

SHIELDS A.Anwendung derAhnlichkeits-Mechanik und der Turbulenzforschung auf die Geschiebebewegung[M].[s.l.]:Preuβ Versuchsanstah Wasserbau Sehitffahrt Berlin Mitteil 2b.1936.

SUNDBOR G A.The River Klaralven:a study in fluvial processes[J].Geogr Ann Stockholm,1956,38:125-316.

MILLER M C,McCAVE I N,KOMAR P D,et al.Threshold of sediment motion under unidirectional currents[J].Sedimentology,1977,24:5075-27.

SOULSBY R L,WHITEHOUSE R.Threshold of sediment motion in coastal environments[G]//Proceedings of Pacific Coasts and Ports Confereces University of Canterbury,Christchurch,New Zealand,Centre for Advanced Engineering,University of Canterbury,1997:149-154.

窦国仁.再论泥沙起动流速[J].泥沙研究,1999,12(6):1-9.

李褆来,窦国仁,窦希萍.波浪作用下泥沙的起动规律[J].中国科学,2001,31(6):566-568.

唐存本.泥沙起动的规律[J].水利学报,1963,2:1-12.

张瑞瑾.河流动力学[M].北京:水利水电出版社,1989.

沙玉清.泥沙运动学引论(修订版)[M].西安:陕西省科学出版社,1996.

贾永刚,栾海晶,许国辉.振动导致黄河口粉质土性质与起动流速的变化[J].岩土力学,2007,28(6):1123-1128.

杨美卿,王桂岭.粘性细泥沙的临界起动公式[J].应用基础与工程科学学报,1995,3(1):99-109.

李华国,袁美琦,张秀芹.淤泥临界起动条件及冲刷率试验研究[J].水动力学与进展.1995,3:20-26.

YU G H,SHI S K.Erosion analysis and regulation measures for the beach in Jiangsu Province[J].The Ocean Engineering,1985,3(3):26-37.

DADE W B,NOWELL A R,JUMARS P A.Predicting erosion resistance of mud[J].Marine Geology,1992,105:285-297.

齐剑峰.饱和粘土循环剪切特性与软化变形的研究[D].大连:大连理工大学,2007,137.

MCNELL J,TAYLOR C,LICK W.Measurements of erosion of undisturbed bottom sediments with depth[J].Journal of Hydraulic Engineering,1996,122(6):316-324.