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首页> 外文期刊>Ocean Engineering >Physical modeling of the axial pipe-soil interaction for pipeline walking on a sloping sandy seabed
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Physical modeling of the axial pipe-soil interaction for pipeline walking on a sloping sandy seabed

机译：倾斜砂质海底管道行走的轴向管-土相互作用的物理模型

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摘要

Axial pipe-soil interaction is crucial for the prediction of pipeline walking, especially on a sloping seabed. In this study, a mechanical-actuator facility has been specially designed and utilized to simulate the axial pipe-soil interactions along a sloping sandy seabed. Based on dimensional analyses, an apparent axial anti-sliding coefficient is proposed to describe the anti-sliding capacity for pipeline walking on a sloping seabed under the fully-drained condition. Effects of the pipeline surface roughness, the submerged weight (G) of the pipeline and the slope angle (alpha) of the seabed on the apparent axial anti-sliding coefficient are investigated experimentally. The experimental results indicate that, for a fixed value of the non-dimensional submerged pipeline weight, both the ultimate anti-sliding capacity and the corresponding mobilization displacement increase with the increase of the slope angle of the seabed. There exist approximately linear correlations between the apparent anti-sliding coefficient and the examined seabed slope angle (- 9 degrees = alpha = 9 degrees) or the non-dimensional submerged pipeline weight (0.34 = G = 0.81). An expression for the apparent axial anti-sliding coefficient incorporating an updated wedging factor is finally deduced and validated with the present experimental results. This axial pipe-soil interaction model may help assessing the pipeline walking along subsea continental slopes.
机译：轴向管道与土壤的相互作用对于预测管道行走（尤其是在倾斜的海床上）的行走至关重要。在这项研究中，已经专门设计并使用了一种机械执行器设备，以模拟沿倾斜的沙质海床的轴向管道-土壤相互作用。在尺寸分析的基础上，提出了表观轴向抗滑系数，以描述在完全排水条件下管道在倾斜海床上行走时的抗滑能力。实验研究了管道表面粗糙度，管道的沉重（G）和海床的倾斜角（α）对表观轴向抗滑系数的影响。实验结果表明，对于无量纲的水下管道重量的固定值，最终的抗滑能力和相应的动员位移都随着海底倾斜角的增加而增加。在表观防滑系数与所检查的海底倾斜角（-9度<= alpha <= 9度）或无量纲浸没式管道重量（0.34 <= G <= 0.81）之间存在近似线性关系。最终推导了包含更新的楔入因子的表观轴向抗滑系数的表达式，并通过本实验结果进行了验证。这种轴向的管道-土壤相互作用模型可以帮助评估沿海底大陆坡行走的管道。

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  • 来源
    《Ocean Engineering》 |2019年第15期|20-30|共11页
  • 作者

    Shi Yu-Min; Wang Ning; Gao Fu-Ping; Qi Wen-Gang; Wang Jun-Qin;

  • 作者单位

    Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;

    Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China|China Acad Bldg Res, Inst Fdn Engn, Beijing 100013, Peoples R China;

    Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;

    Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China|Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China;

    CNOOC, Res Inst, Beijing 100027, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sloping seabed; Pipeline walking; Pipeline-seabed interaction; Physical modeling;

    机译：倾斜海床;管道行走;管道-海床相互作用;物理模拟;

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