Abstract Several structures as in the case of offshore structures like jetty, flood wall and wind turbines are mostly subjected to uplift loads. Thereby, the safe design for such cases is using piles. In this research a novel recent technique is adopted to improve the uplift capacity of the pile. In this paper, the uplift capacities of single regular piles (without wings) and anchor winged vertical piles installed in dry sand with different densities are investigated. A total number of sixty experimental model single regular and anchor winged piles tests were performed. Model test series were performed at a fixed embedment depth, and pile diameter. The effect of wings which were designed at the tip of the pile at different values of length and diameter was studied. The test results demonstrated that the uplift capacity of anchor winged piles increases with the increase of sand relative densities. At the ratio of wing length to pile length (Lw/Lp) = 0.50 and at the ratio of the maximum diameter between the outer edges of the wing to pile diameter (Dw/Dp) = 3.0 the efficiency of improvement in the uplift capacity reached to 2.0, 2.38 and 2.77 times of regular piles without wings at sand relative densities of 30 %, 50 % and 80 % respectively. The presence of such wings at the tip of the mono-pile provided an ideal anchorage system because of the significant locking-up influence of the wings within the soils, ensuing improved uplift capacity and reduced the pile movement. The existence of such wings can significantly increase the earth pressure and skin friction around the pile shaft in the form of (K) and (Fs) respectively.

中文翻译：

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抬升荷载作用下带翼单桩模型研究

摘要 诸如码头、防洪墙和风力涡轮机等海上结构的几种结构主要承受隆起载荷。因此，这种情况的安全设计是使用桩。在这项研究中，采用了一种新的新技术来提高桩的抗拔能力。本文研究了安装在不同密度干砂中的单个规则桩（无翼）和锚翼垂直桩的抗拔能力。总共进行了 60 个实验模型单常规和锚翼桩测试。模型试验系列在固定的埋置深度和桩径下进行。研究了设计在桩尖的翼在不同长度和直径值下的影响。试验结果表明，锚翼桩的抗拔能力随着砂相对密度的增加而增加。在机翼长度与桩长之比 (Lw/Lp) = 0.50 和机翼外边缘之间的最大直径与桩径之比 (Dw/Dp) = 3.0 时，提升能力的提高效率达到在砂相对密度分别为 30%、50% 和 80% 时，是无翼普通桩的 2.0、2.38 和 2.77 倍。由于翼在土壤中的显着锁定影响，在单桩尖端的这种翼的存在提供了理想的锚固系统，从而提高了提升能力并减少了桩移动。