Canadian Geotechnical Journal, Ahead of Print.
Dynamically installed anchor (DIA) for deepwater mooring is an innovative and cost-effective technology in offshore foundation engineering; however, research on the effects of fin configuration of DIAs is limited. This study therefore systematically examines the effects of fin length–width ratio, fin surface area, fin position, and fin shape on the embedment depth and time-dependent holding capacity of DIAs by experimental and theoretical approaches. First, a series of centrifuge tests was performed on four DIA models with an identical fin surface area, but different fin configurations. It is found that the DIA model with short-wide-rectangular fins that are installed at the rear of the shaft achieves deeper embedment depth and higher holding capacity; whereas, the rectangular- and elliptical-shaped DIA models are similar in terms of embedment and capacity. This motivates the proposal for another nine types of finned DIAs in a more systematic manner. Furthermore, the performance of embedment depth and time-dependent holding capacity for these nine DIAs was theoretically assessed using the well-established theoretical methods. In this study, two scenarios with identical impact velocity or embedment depth were examined; wherein the variation of holding capacity with reconsolidation time was explicitly accounted for. Based on the findings, practical implications of fin configurations were reached that may benefit the design of finned DIAs in practice.

中文翻译：

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黏土动态安装锚杆翅片结构效应的实验和理论研究

加拿大岩土工程杂志，提前印刷。
用于深水系泊的动力安装锚 (DIA) 是海上基础工程中的一项创新且具有成本效益的技术；然而，对 DIA 鳍片配置影响的研究是有限的。因此，本研究通过实验和理论方法系统地研究了翅片长宽比、翅片表面积、翅片位置和翅片形状对 DIA 嵌入深度和时间相关保持能力的影响。首先，对具有相同翅片表面积但翅片配置不同的四个 DIA 模型进行了一系列离心测试。发现在轴后安装短宽矩形翅片的DIA模型实现了更深的嵌入深度和更高的保持能力；然而，矩形和椭圆形 DIA 模型在嵌入和容量方面相似。这促使以更系统的方式提出另外九种类型的翅片 DIA。此外，使用完善的理论方法从理论上评估了这九种 DIA 的嵌入深度和随时间变化的保持能力的性能。在这项研究中，研究了具有相同冲击速度或嵌入深度的两种情况；其中明确考虑了容量随再固结时间的变化。根据研究结果，达到了翅片配置的实际意义，这可能有利于在实践中翅片 DIA 的设计。使用完善的理论方法从理论上评估了这九个 DIA 的嵌入深度和随时间变化的保持能力的性能。在这项研究中，研究了具有相同冲击速度或嵌入深度的两种情况；其中明确考虑了容量随再固结时间的变化。根据研究结果，达到了翅片配置的实际意义，这可能有利于在实践中翅片 DIA 的设计。使用完善的理论方法从理论上评估了这九个 DIA 的嵌入深度和随时间变化的保持能力的性能。在这项研究中，研究了具有相同冲击速度或嵌入深度的两种情况；其中明确考虑了容量随再固结时间的变化。根据研究结果，达到了翅片配置的实际意义，这可能有利于在实践中翅片 DIA 的设计。