海上风电吸力式筒型基础应用研究

Application Research on Suction Bucket Foundation for Offshore Wind Power

[目的]筒型基础是一种极具潜力的环境友好型海上风电基础,如何有效的实现筒型基础顺利下沉到设计深度和下沉过程结构垂直度的精准控制,避免筒内土塞隆起或筒裙及分舱板变形甚至屈曲带来的安装风险是筒型基础应用层面的关键问题。[方法]通过总结吸力式筒型基础在国内外风电工程中的应用,分析了筒型基础施工过程中下沉和调平两个关键问题涉及的相关机理和方法。[结果]研究表明:准确预测复杂土质条件下筒型基础施工过程下沉阻力及施工临界吸力和施工过程可能发生的结构变形等不稳定性态分析将有效规避单筒型、多筒型和单筒多舱复合型筒型基础吸力下沉调平过程中的施工风险。[结论]海上风电吸力式筒型基础应用总结分析,可以为实际工程提供筒型基础下沉和调平施工方案的相关参考。

[Introduction]Bucket foundation is a promising and environmental friendly foundation for offshore wind turbines.Effectively penetrating this foundation to a design depth with satisfied levelness and avoiding the side soil plug heave or the buckling deformation of bucket skirt and compartment plates during the suction installation are chanlleging problems for the development of bucket foundations.[Method]By summarizing the application of the suction bucket foundation at wind power section in the world,the related mechanisms and methods involved in the two critical issues of penetrating and leveling during the suction construction process were analyzed.[Result]The results show that the accurate estimation for the penetration resistance,the critical suction and the possible structural deformation in layered soils can effectively facilitate the systematic analysis of the instability mechanism of the bucket foundation,the multi-bucket founfation and the compartment-bucket foundation in terms of the installtion risk reduction.[Conclusion]The summary analysis of application of suction bucket foundation for offshore wind power can provide some reference for the foundation penetrating and leveling construction scheme for the actual project.