Christopher Golightly — Go-Els. This paper was first publishe in GE’s January 2014 issue.
In the newly developing northern European offshore wind industry, it is becoming apparent that driven tubular steel piles, and monopiles in particular, will continue to be used in what some would regard as excessive water depths of greater than about 25m with diameters of the order of 5m to 7m.
This depth was often used as a general rule-of-thumb in the early days of UK Rounds 1 and 2 and the first Danish, Swedish and German projects for the transition from monopiles to jackets/tripods. However, the DONG/Carbon Trust “Pisa” Project aims to demonstrate the feasibility of 10m or larger diameter monopiles in up to 40m water depths and 1,200t in weight.