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A total of 245,000 m³ concrete were delivered by HeidelbergCement’s
subsidiary NorBetong. Deck is usually built in one piece, brought on a barge or
barges over to and then mated with almost completely submerged substructure.
The completely assembled platform is then towed to the installation site and
ballasted down to seafloor. Because of this unique way of construction,
geographical locations to which this type is applicable are limited. Only a few
applications (fig. 3.5) can be found in the world except in the North Sea, where
Norwegian fjords and Scottish firths provide ideal construction sites. This type is
inevitably massive and suitable for self-contained drilling and production role.
Storage capability can be easily incorporated, making this type suitable for
situations where pipeline transportation is not readily available
Figure 3.5 – Gravity Base Structures
3.1.3 Gravity-Paled Structures. Offshore structures that are placed on the
seafloor and held in place by their weight and require additional help from piles are
called Gravity-Paled structures (fig. 3.6).
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