Installation and capacity performance of multi-line dynamically installed anchors

IF 3 3区工程技术 Q2 ENGINEERING, GEOLOGICAL

Canadian Geotechnical Journal Pub Date : 2023-10-27 DOI:10.1139/cgj-2022-0623

Jun Liu, Yunfei Li, Xinshuai Guo, Congcong Han

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引用次数: 0

Abstract

The multi-line anchor achieves the ‘anchor sharing’ goal by allowing multiple floating devices to be moored, such that the total number of anchors in a floating device array can be reduced significantly. This study proposes a dynamically installed anchor with the potential of resisting uplift loads from varied directions. The multi-line anchor is dynamically installed with the aid of a booster. The installation performance of the hybrid anchor (i.e. multi-line anchor + booster) is first examined by field tests. Then finite-element analyses are performed to investigate the uplift capacity of the anchor under V-H-M-T combined loading conditions. Based on the numerical results, yield envelopes are established for assessing the ultimate bearing capacity of the anchor. Additionally, model tests are conducted to quantitatively study the installation and set-up effects on the uplift capacity of the anchor, indicating the vertical and torque capacities are sensitive to the installation effect. Finally, a design framework is proposed to assess the stability of the multi-line anchor under combined loading conditions.

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多线动态安装锚杆的安装及承载力性能

通过允许多个浮动设备停泊，多缆锚实现了“锚共享”的目标，这样可以显著减少浮动设备阵列中的锚的总数。本研究提出了一种具有抵抗不同方向上拔荷载潜力的动态安装锚杆。多缆锚是借助助推器动态安装的。首先通过现场试验验证了混合锚杆(即多线锚杆+升压器)的安装性能。然后对锚杆在V-H-M-T组合荷载作用下的抗拔能力进行了有限元分析。在此基础上，建立了评估锚杆极限承载力的屈服包络线。此外，通过模型试验定量研究了安装和布置对锚杆上拔能力的影响，结果表明，锚杆的竖向能力和扭矩能力对安装影响较为敏感。最后，提出了一种评估多线锚杆在复合荷载条件下稳定性的设计框架。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Canadian Geotechnical Journal 地学-地球科学综合

CiteScore

7.20

自引率

5.60%

发文量

163

审稿时长

7.5 months

期刊介绍： The Canadian Geotechnical Journal features articles, notes, reviews, and discussions related to new developments in geotechnical and geoenvironmental engineering, and applied sciences. The topics of papers written by researchers and engineers/scientists active in industry include soil and rock mechanics, material properties and fundamental behaviour, site characterization, foundations, excavations, tunnels, dams and embankments, slopes, landslides, geological and rock engineering, ground improvement, hydrogeology and contaminant hydrogeology, geochemistry, waste management, geosynthetics, offshore engineering, ice, frozen ground and northern engineering, risk and reliability applications, and physical and numerical modelling. Contributions that have practical relevance are preferred, including case records. Purely theoretical contributions are not generally published unless they are on a topic of special interest (like unsaturated soil mechanics or cold regions geotechnics) or they have direct practical value.