潮间带钢管斜桩吊打导向装置与沉桩参数研究

钢管斜桩是潮间带风电的常用基础形式，常采用吊打沉桩的方式。文章针对潮间带吊打沉桩方式的难点开发吊打导向装置，并总结沉桩参数的确定方法。该导向装置包括定位桩、定位架和调向限位架，总体平面布局为六边形，可一次定位并完成整个风电基础的基桩施工，既能可靠保证桩的施工精度，又能极大地提高施工效率和降低安全风险；在应用该施工关键装备时，采用GRLWEAP打桩分析功能确定桩顶动荷载，采用有限元软件建立导向装置有限元模型，对导向装置和沉桩参数进行分析，从而实现斜桩顺利沉桩的目的。该装置和方法已成功应用于越南朔庄一期海上风电场项目，为潮间带风电钢管斜桩吊打施工提供沉桩装备和方法经验。

The Guiding Device for Lifting and Driving of Inclined Steel Pipe Pile and Pile Driving Parameters at Intertidal Zone

Inclined steel pipe pile is the common foundation form of wind power in intertidal area, the method of pile lifting and driving is often adopted. Aiming at the difficulties of pile lifting and driving at intertidal zone, one guiding device for pile lifting and driving has been developed and the determination method of pile driving parameters been summarized. The guiding device includes positioning pile, positioning frame and direction adjustment limit frame. The overall plane layout is six-sided, which can be positioned at one time to complete the construction of the whole wind power foundation pile. It can not only ensure the construction accuracy of the pile, but also greatly improve the construction efficiency and reduce safety risks. When the key construction equipment was applied, the dynamic load of pile top was determined by pile driving analysis function of GRLWEAP, the finite element model of guide device and engineering pile was established by finite element software, and the parameters of guide device and pile driving were analyzed, to achieve the goal of smooth driving of inclined pile. The device and method had been successfully applied to the Soc Trang wind power plant- phase I project, Vietnam, and the analysis of this paper provided the experience of pile driving equipment and method for lifting and driving of inclined steel pipe pile at intertidal zone.