The effect of radial fins on the uplift resistance of buried pipelines
The effect of radial fins on the uplift resistance of buried pipelines
复制标题
径向翅片对埋地管道抗拔力的影响
DOI：
10.1680/jgele.16.00142
复制
发表时间：
2017
影响因子：
2.1
通讯作者：
A. Maconochie
中科院分区：
文献类型：
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作者：
J. Tom;C. O’Loughlin;D. White;A. Haghighi;A. Maconochie
本文研究了通过在管道圆周上增加径向翅片来提高埋地管道抗拔力的可能性。在松散砂中进行的实验表明，翅片延伸管直径的20%增加垂直峰值抗拔力高达25%，这取决于嵌入深度和翅片配置。一个极限平衡的解决方案-根据已知的峰值摩擦和扩张角的值-预测的抗拔力在13%的测量。峰值抗拔力的趋势与嵌入和翅片配置也复制在数值分析中使用非关联的莫尔-库仑土壤模型。数值预测的峰值抗拔力分别在粗糙和光滑界面的实验值的10%和21%之内。从数值分析的土壤破坏机制是大致一致的，在极限平衡解假设。然而，实验观察到的机制不同…
This paper investigates the potential for increasing the uplift resistance of buried pipelines through the addition of radial fins on the pipe circumference. Experiments conducted in loose sand showed that fins extending by 20% of the pipe diameter increase the vertical peak uplift resistance by up to 25%, depending on embedment depth and fin configuration. A limit equilibrium solution – based on known values of peak friction and dilation angles – predicts the uplift resistance within 13% of the measurements. The trends of peak uplift resistance with embedment and fin configuration were also replicated in numerical analyses conducted using a non-associated Mohr–Coulomb soil model. The numerically predicted peak uplift resistances were within 10 and 21% of the experimental values for rough and smooth interfaces, respectively. Soil failure mechanisms from the numerical analyses were broadly consistent with that assumed in the limit equilibrium solution. However, the experimentally observed mechanisms differ...