IMECH-IR  > 流固耦合系统力学重点实验室
Physical modelling of local scour at twin piles under combined waves and current
Qi WG(漆文刚); Li YX; Xu K; Gao FP(高福平)
Source PublicationCOASTAL ENGINEERING
2019
Volume143Pages:63-75
ISSN0378-3839
AbstractUnder the actions of ocean waves and current, severe local scour can be induced around pile groups, significantly compromising the safety of marine structures. A series of flume tests were conducted for physical modelling the local scouring process around twin piles in the cohesionless soils under combined waves and currents, and compared with the pure current case. The effects of non-dimensional pile spacing (G/D) and flow skew angle (alpha) on the scour depth and time scale of scour around twin piles are intensively examined. The experimental observations indicate that the influence of pile spacing on the scour depth development is much more significant for the side-by-side (alpha = 90 degrees) arrangement than that for the tandem arrangement (alpha = 0 degrees). With the increase of flow skew angle alpha, the maximum scour depth is remarkably enhanced within the examined range 0 <= G/D <= 3.0. When G/D = 3.0, the pile group effect on the time scale is generally negligible for pure current cases, whereas a prominent pile-group effect can still be observed for combined wave-current cases, especially for the side-by-side arrangement. A parameter of "equivalent pile diameter" is then introduced for evaluating the maximum scour depth at the twin piles with the previous formulas for the single pile. Based on the existing and present experimental data, the empirical formula of dimensionless equivalent pile diameter as the function of G/D and alpha is established to predict the maximum scour depth at the twin piles.
KeywordLocal scour Twin piles Pile-group Skew angle Horseshoe vortex PIV technique Combined waves and current Time scale Equivalent pile diameter
DOI10.1016/j.coastaleng.2018.10.009
Indexed BySCI ; EI
Language英语
WOS IDWOS:000452817100006
WOS KeywordHORSESHOE VORTEX ; VERTICAL PILES ; MONOPILE
WOS Research AreaEngineering, Civil ; Engineering, Ocean
WOS SubjectEngineering
Funding OrganizationNational Natural Foundation of China [11602273, 11825205] ; Major State Basic Research Development Program of China (973 Program) [2014CB046204] ; Youth Innovation Promotion Association CAS
Classification一类
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78481
Collection流固耦合系统力学重点实验室
Affiliation1.{Qi, Wen-Gang、Li, Yi-Xuan、Xu, Kai、Gao, Fu-Ping} Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
2.{Qi, Wen-Gang、Li, Yi-Xuan、Xu, Kai、Gao, Fu-Ping} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.{Li, Yi-Xuan} China State Construct Engn Corp Ltd, Civil Infrastruct Operat Dept, Beijing 100044, Peoples R China
Recommended Citation
GB/T 7714
Qi WG,Li YX,Xu K,et al. Physical modelling of local scour at twin piles under combined waves and current[J]. COASTAL ENGINEERING,2019,143:63-75.
APA 漆文刚,Li YX,Xu K,&高福平.(2019).Physical modelling of local scour at twin piles under combined waves and current.COASTAL ENGINEERING,143,63-75.
MLA 漆文刚,et al."Physical modelling of local scour at twin piles under combined waves and current".COASTAL ENGINEERING 143(2019):63-75.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[漆文刚]'s Articles
[Li YX]'s Articles
[Xu K]'s Articles
Baidu academic
Similar articles in Baidu academic
[漆文刚]'s Articles
[Li YX]'s Articles
[Xu K]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[漆文刚]'s Articles
[Li YX]'s Articles
[Xu K]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.