Environmental Engineering Reference
In-Depth Information
Fig. 5.13 Fabrication
in
the dry dock
mounting
the steel
tower segments. (source: www.
-
middelgrunden.dk )
Figure 5.13 shows the fabrication in the dry dock, which included mounting the bottom
section of the steel tower (including transformer and switchgear).
Transport to and erection at the site was undertaken with a heavy-lift crane vessel as
shown in Figure 5.14.
Prestressed concrete towers comprising precast concrete segments are also possible
offshore. For such structures, the parts below the waterline and in the splash zone
should be in the form of a large, compact reinforced concrete substructure. Prestressing
is not absolutely essential here. Above the splash zone, the tower can be built using
precast concrete segments with external prestressing (Figure 5.15).
Fig. 5.14 Erection operations at sea. (source: www.middelgrunden.dk )
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