Field trials of suction caissons in clay for offshore wind turbine foundations
Field trials of suction caissons in clay for offshore wind turbine foundations
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DOI：
10.1680/geot.2005.55.4.287
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发表时间：
2005-05
期刊：
影响因子：
5.8
通讯作者：
G. Houlsby;R. Kelly;J. Huxtable;B. Byrne
中科院分区：
文献类型：
--
作者：
G. Houlsby;R. Kelly;J. Huxtable;B. Byrne
本文描述了在苏格兰卢斯湾附近的人工砂试验台上对负压沉箱基础进行测试的方案。这些测试与海上风力涡轮机的单脚或四足基础的设计有关。记录了沉箱的吸力安装，准静态和动态条件下的循环弯矩加载以模拟独脚式基础的性态，以及沉箱的循环竖向加载和拔出以模拟四足基础中的一个基脚。试验结果表明，随着地基荷载水平的变化，地基的初始刚度较大，在中等荷载下表现出滞回特性，而在高荷载下则表现出较差的反应。简要讨论了对风力机基础设计的一些启示。
A programme of testing on suction caisson foundations in an artificially prepared sand test bed near Luce Bay, in Scotland, is described. The tests are relevant to the design of either monopod or quadruped foundations for offshore wind turbines. Records are presented for suction installation of the caissons, cyclic moment loading under both quasi-static and dynamic conditions to simulate the behaviour of a monopod foundation, and cyclic vertical loading and pullout of caissons to simulate one footing in a quadruped foundation. Variations of stiffness with loading level of the foundation are observed, with high initial stiffness followed by hysteretic behaviour at moderate loads and degradation of response at high loads. Some implications for the design of wind turbine foundations are briefly discussed.