Plate-forme maritime a haubans

Construction and installation of offshore platforms and islands

Abstract

<P>La présente invention a pour objet une plate-forme maritime (1) comprenant une structure porteuse verticale (9) posée sur le fond (2) de la mer et supportant des superstructures émergées (4) et des haubans (10) fixés à leur extrémité supérieure à ladite structure porteuse (9) et ancrés (8) à leur autre extrémité inférieure dans ledit fond (2) de la mer; suivant l'invention, lesdits haubans (10) comportent au moins trois lignes d'haubanage réparties autour de la structure porteuse, chacune de ces lignes d'haubanage comportant au moins un support (11) solidaire, porté par la structure (9) et situé entre ledit fond (2) et l'extrémité supérieure des haubans (10), lequel support (11) faisant entretoise entre ladite structure (9) et lesdits haubans (10) qui y sont fixés et y prennent appui et des bas-haubans (12) reliant la structure porteuse (9) au niveau de chaque support (11) de haubans (10) aux extrémités extérieures du support situé en dessous; l'ensemble des ancrages (8) de ces haubans (10) est situé à l'intérieur d'un cercle de diamètre inférieur au moins au septième de la hauteur de la structure porteuse (9).</P>
Maritime platform (1) comprises a vertical bearing structure (9) mounted on the sea bed (2), and supporting emerging superstructures (4) and bracings (shrouds) (10) fixed at their top end to the bearing structure, and anchored at their bottom end to the sea bed. The bracings each comprise at least three shrouds divided around the bearing structure, with each line contg. at least one solid support (11) carried by the structure, and located between the sea bed and the top extremity of the bracings. The support forms a tie between the structure and the bracings which are fixed to it. Also claimed is a process for putting in place a maritime platform as above, by positioning a self-raising platform on the sea bed next to where the platform is to be situated. This self raising platform is equipped with mobile drilling equipment mounted next to the main bridge of the platform. At least three anchors are anchored in the sea bed using the drilling equipment. The vertical bearing structure is then positioned on the sea bed in the centre of the anchorages, the structure is anchored and the bracings are tensioned.

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Cited By (0)

    Publication numberPublication dateAssigneeTitle