| 摘要 |
An oscillatable marine installation comprises a concrete and steel lattice shaft supported by a demountable pivot joint on a base fixed to the sea-bed and including an anti-torque device. The pivot joint is made up of three parts a casing fixed to the shaft, a part-spherical housing fixed to the base, and a pivot member. The pivot member has an upper part cooperating with the casing, a flange which can be fixed to the casing, and a lower part-spherical part which supports a resilient assembly and a bush. The bush is fixed on the housing. The anti-torque device comprises a universal joint, concentric with the pivot joint. Two opposite pivots of the cross-piece of the universal joint are supported by the lower part of the shaft and the other two pivots by the base. At least two opposite pivots have damping devices. The pivots supported by the base are mounted on supports of adjustable. |
