ABSTRACT

More than 485 suction anchors, had been installed for anchoring floaters at more than 50 different sites by the year 2004 (Andersen et al. 2005). Most of these anchors are in clay, but some are also in sand or layered soils. Examples of skirted foundations in sand are the offshore steel platforms at Draupner E and Sleipner T sites in the North Sea (Tjelta 1995). Skirted foundations in sand can also be used to increase the moment fixity and can be an attractive foundation alternative for offshore wind turbine as the bucket foundation installed in Frederikshavn has shown. (Ibsen 2008).