A STRUCTURE FOR OFFSHORE OPERATION AND A METHOD FOR INSTALLATION OF AN OFFSHORE FLOATING STRUCTURE

摘要

An offshore platform comprises a deck (1) supported on a plurality of vertically movable legs (4) which can be displaced relative to the deck by a jack-up mechanism (2, 3). The jack-up mechanism (2, 3) comprises an upper portion which connects an upper end of the legs to the upper side of the deck and a lower portion which connects a lower end of the legs to the underside of the deck. Both portions of the jack-up mechanism are pre-tensioned such that when moving the deck relative to the deck, both portions are permanently tension loaded.