ABSTRACT

Farm in Zhejiang province and a few other beach wind farms will be ex tended to offshore. Several other new offshore wind farms are also in plan as well.

The foundation is used to carry all loads of superstructures, and it is one of the most important components in the design procedure. Compared with those built farms onshore, the offshore wind turbine foundation has an additional 30 percent in cost. The soil of present and potential sites for offshore wind farms in China are mainly soft clay and fine sand/sandy silt. In the case of soft clay seabed, multi-type foundations, such as multi-pile group or multi-caisson, are comparatively suitable; while for fine sand/sandy silt seabed, single footing foundations, for example, mono-pile, gravity base foundation (GBF) and the mono-caisson are more economical.