Existing caisson foundations, utilised for offshore wind turbines, are required to resist significant lateral loads and overturning moments generated by wind and currents. This paper presents an innovative type of foundation, a ‘winged caisson foundation’, to support offshore wind turbines, which has the ability to provide a larger overturning capacity compared with standard caisson designs. Through a series of small-scale experiments at 1g conditions, the competence of the proposed foundations was examined. Different models with various wing sizes and different soil densities were tested in the laboratory under overturning loadings and the results were compared with a standard caisson. The moment–rotation performance of the foundation under both monotonic and cyclic loading was examined to assess the potential benefits of adding wings to caisson foundations. The results showed that there is a significant increase (up to 75%) in overturning capacity provided by the novel foundation, demonstrating its great potential over standard caissons for use in offshore wind turbine foundations.

中文翻译：

---

沙地单脚形沉箱基础的单调和循环侧向荷载试验

需要用于海上风力涡轮机的现有沉箱基础来抵抗显着的横向载荷和由风和流产生的倾覆力矩。本文提出了一种创新型基础，即“翼形沉箱基础”，以支撑海上风力涡轮机，与标准沉箱设计相比，它具有更大的倾覆能力。通过一系列1 g的小规模实验在一定条件下，对提议的基金会的能力进行了检查。在倾覆载荷下，在实验室测试了具有不同机翼尺寸和不同土壤密度的不同模型，并将结果与​​标准沉箱进行了比较。研究了基础在单调和周期性载荷下的力矩-旋转性能，以评估在沉箱基础上增加翼形的潜在好处。结果表明，新型基础的抗倾覆能力显着提高（最高可达75％），证明了其在海上风电基础中使用标准沉箱的巨大潜力。