| Submarine pipeline lateral instability on a sloping sandy seabed | |
Gao FP(高福平) ; Han XT(韩希霆); Cao J; Sha Y; Cui JS(崔金声); Gao, FP; Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
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| Source Publication | OCEAN ENGINEERING
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| 2012-08-01 | |
| Volume | 50Pages:44-52 |
| ISSN | 0029-8018 |
| Abstract | Ocean-current induced pipeline on-bottom stability on a sloping sandy seabed involves a complex interaction between the hydrodynamic loading, the untrenched pipeline and the neighboring soil. In this study, a newly-designed pipe-soil interaction facility and a flow-structure-soil interaction flume have been utilized for full-scale physical modeling of the pipeline instability on a sloping sand-bed, including the downslope instability and the upslope instability. Unlike the pipeline lateral stability on the horizontal seabed, an initial lateral-soil-resistance is developed and the static-instability might be triggered for the sloping seabed. According to dimensionless analyses, an ultimate lateral-soil-resistance coefficient is proposed to describe the interaction of the pipe with the sloping sand-bed. Experimental results indicate that sand-bed slope angle, pipe submerged weight and end-constraints have much influence on pipe on-bottom stability. No matter for the upslope instability or the downslope instability, the corresponding lateral-soil-resistance coefficient for a sloping sand-bed is larger than that for a horizontal sand-bed. |
| Keyword | Sloping Seabed Deepwater Pipeline On-bottom Stability Ocean Currents Partially-embedded Pipeline Scour Flow Stability Currents |
| Subject Area | 流固耦合作用 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000306769400006 |
| Funding Organization | This work is financially supported by Knowledge Innovation Program of Chinese Academy of Sciences (Grant No. KJCX2-YW-L02) and China National S&T Major Project (Grant No. 2008ZX05026-005-09). Helpful discussion with Senior Engineer X. Jia from CNOOC Research Institute and the technical assistances from Mr. F.L. Zhang and Mr. H.T. Zhang are greatly appreciated. |
| Department | LMFS流固土耦合力学(LHO) |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46647 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Gao, FP; Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Gao FP,Han XT,Cao J,et al. Submarine pipeline lateral instability on a sloping sandy seabed[J]. OCEAN ENGINEERING,2012,50:44-52. |
| APA | 高福平.,韩希霆.,Cao J.,Sha Y.,崔金声.,...&Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China..(2012).Submarine pipeline lateral instability on a sloping sandy seabed.OCEAN ENGINEERING,50,44-52. |
| MLA | 高福平,et al."Submarine pipeline lateral instability on a sloping sandy seabed".OCEAN ENGINEERING 50(2012):44-52. |
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