Construction of prestressed concrete towers - Concrete Structures for Wind Turbines - page 208

Fig. 5.22 Prestressed concrete monopile
crane vessel. The crane lifts the concrete monopile, aligns it and then lowers a drilling
unit through the hollow centre into the subsoil. Drilling a hole in the seabed allows the
base of the monopile to sink into the ground and be embedded at the necessary depth
(Figure 5.22).