Experimental study of erosion threshold of reconstituted sediments

IMECH-IR > 水动力学与海洋工程重点实验室(2009-2011)

	Experimental study of erosion threshold of reconstituted sediments
	Ye ZH; Cheng L; Zang ZP(臧志鹏); Ye, ZH (reprint author), Univ Western Australia, Sch Civil & Resource Engn, Perth, WA 6009, Australia.
会议录名称	OMAE2011: PROCEEDINGS OF THE ASME 30TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, VOL 7: CFD AND VIV: OFFSHORE GEOTECHNICS
	2011
页码	973-983
会议名称	30th International Conference on Ocean, Offshore and Arctic Engineering
会议日期	JUN 19-24, 2011
会议地点	Rotterdam, NETHERLANDS
摘要	Understanding of fundamental erosion characteristics of seabed sediments on which pipelines and other structures are founded is critical for the design of these facilities. The erosion threshold condition of cohesive sediments is not well understood because of the complexity and variability of natural sediments. Most of the existing methods for evaluating the erosion behaviours of seabed sediment are often applicable to the certain particular sediment types and test conditions. There appears to be a need for more research efforts in this area. In present research, the threshold of motion of four moderately consolidated mixtures was tested under unidirectional currents using a testing facility. Three threshold shear stress increase modes were observed, including initial increase mode, steady increase mode and equilibrium mode as mass content of mud Pm increases. A dimensionless threshold shear stress t is proposed to quantify the shear strength of these reconstituted mixtures, coupled with variation of coarse particle size. Finally, a predicting model is proposed to illustrate the trend of erosion threshold of the four mixtures as a function of mud weight content. Further understanding of erosion threshold can rely on the various consolidation conditions and different coarse and fine materials inputted in the mixture.
关键词	Arctic Engineering Erosion Mixtures Sedimentology Shear Stress Coarse Particles Cohesive Sediments Equilibrium Modes Erosion Characteristics Erosion Thresholds Experimental Studies Mass Content Mud Weights Natural Sediments Predicting Models Research Efforts Seabed Sediments Test Condition Testing Facility
课题组名称	LMFS流固土耦合力学(LHO)
ISBN号	978-0-7918-4439-7
URL	查看原文
收录类别	CPCI ; EI
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46848
专题	水动力学与海洋工程重点实验室(2009-2011)
通讯作者	Ye, ZH (reprint author), Univ Western Australia, Sch Civil & Resource Engn, Perth, WA 6009, Australia.
推荐引用方式 GB/T 7714	Ye ZH,Cheng L,Zang ZP,et al. Experimental study of erosion threshold of reconstituted sediments[C]OMAE2011: PROCEEDINGS OF THE ASME 30TH INTERNATIONAL CONFERENCE ON OCEAN, OFFSHORE AND ARCTIC ENGINEERING, VOL 7: CFD AND VIV: OFFSHORE GEOTECHNICS,2011:973-983.

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