Occurrence of spanning of a submarine pipeline with initial embedment
文献类型：会议论文
| 作者 | Gao FP(高福平) ; Yang B(杨兵); Yan SM(闫术明); Wu YX(吴应湘); Gao FP
|
| 出版日期 | 2007 |
| 会议名称 | 17th International Offshore and Polar Engineering Conference (ISOPE 2007) |
| 会议日期 | JUL 01-06, 2007 |
| 会议地点 | Lisbon, PORTUGAL |
| 关键词 | Submarine Pipeline Pipe Span Currents Sands Seepage Failure Scour |
| 页码 | 887-891 |
| 通讯作者 | Gao FP |
| 中文摘要 | For better understanding the mechanism of the occurrence of pipeline span for a pipeline with initial embedment, physical and numerical methods are adopted in this study. Experimental observations show that there often exist three characteristic phases in the process of the partially embedded pipeline being suspended: (a) local scour around pipe; (b) onset of soil erosion beneath pipe; and (c) complete suspension of pipe. The effects of local scour on the onset of soil erosion beneath the pipe are much less than those of soil seepage failure induced by the pressure drop. Based on the above observations and analyses, the mechanism of the occurrence of pipeline spanning is analyzed numerically in view of soil seepage failure. In the numerical analyses, the current-induced pressure along the soil surface in the vicinity of the pipe (i.e. the pressure drop) is firstly obtained by solving the N-S equations, thereafter the seepage flow in the soil is calculated with the obtained pressure drop as the boundary conditions along the soil surface. Numerical results indicate that the seepage failure (or piping) may occur at the exit of the seepage path when the pressure gradient gets larger than the critical value. The numerical treatment provides a practical tool for evaluating the potentials for the occurrence of pipe span due to the soil seepage failure. |
| 收录类别 | CPCI-S ; EI |
| 会议录 | Proceedings Of The Seventeenth (2007) International Offshore And Polar Engineering Conference, Vol 1- 4, Proceedings
 |
| 会议录出版者 | Cupertino |
| 会议录出版地 | International Society Offshore& Polar Engineers |
| 语种 | 英语 |
| ISSN号 | 978-1-880653-68-5 |
| WOS记录号 | WOS:000250717701020 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/25494]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 通讯作者 | Gao FP |
| 推荐引用方式 GB/T 7714 | Gao FP,Yang B,Yan SM,et al. Occurrence of spanning of a submarine pipeline with initial embedment[C]. 见:17th International Offshore and Polar Engineering Conference (ISOPE 2007). Lisbon, PORTUGAL. JUL 01-06, 2007. |
入库方式： OAI收割
来源：力学研究所
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