| Scour of the Seabed Under A Pipeline in Oscillating Flow |
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| 作者姓名： | PU Qun |
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| 作者单位： | Institute of Mechanics，Chinese Academy of Sciences，Institute of Mechanics，Chinese Academy of Sciences，Institute of Mechanics，Chinese Academy of Sciences Beijing 100080，China，Beijing 100080，China，Beijing 100080，China |
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| 摘 要： | The scour of the seabed under a pipeline is studied experimentally in this paper. Tests are carried out in a U-shaped oscillatory water tunnel with a box imbedded in the bottom of the test section. By use of the standard sand, clay and plastic grain as the seabed material, the influence of the bed material on the scour is studied. The relationship between the critical initial gap-to-diameter ratio above which no scour occurs and the parameters of the oscillating flow is obtained. The self-burial phenomenon, which occurs for the pipeline not fixed to two sidewalls of the test section, is not observed for the fixed pipeline. The effect of the pipe on sand wave formation is discussed. The maximum equilibrium scour depths for different initial gap-to-diameter ratios, different Kc numbers and different bed sands are also given in this paper.
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Scour of the Seabed Under A Pipeline in Oscillating Flow |
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| PU Qun LI Kunand GAO FupingInstitute of Mechanics,Chinese Academy of Sciences,Beijing ,China.Scour of the Seabed Under A Pipeline in Oscillating Flow[J].China Ocean Engineering,2001(1):129-138. |
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| Authors: | PU Qun LI Kunand GAO FupingInstitute of Mechanics Chinese Academy of Sciences Beijing China |
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| Institution: | Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The scour of the seabed under a pipeline is studied experimentally in this paper. Tests are carried out in a U-shaped oscillatory water tunnel with a box imbedded in the bottom of the test section. By use of the standard sand, clay and plastic grain as the seabed material, the influence of the bed material on the scour is studied. The relationship between the critical initial gap-to-diameter ratio above which no scour occurs and the parameters of the oscillating flow is obtained. The self-burial phenomenon, which occurs for the pipeline not fixed to two sidewalls of the test section, is not observed for the fixed pipeline. The effect of the pipe on sand wave formation is discussed. The maximum equilibrium scour depths for different initial gap-to-diameter ratios, different Kc numbers and different bed sands are also given in this paper. |
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| Keywords: | scour pipeline oscillating flow seabed |
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