| 摘要 |
Semi-submersible platform, in particular for exploration and/or working underwater deposits in cold seas, of the type comprising a deck or an assembly of decks bearing various pieces of equipment, connected via an intermediate structure to a base comprising one or more floats, as well as means of mooring and means of connection capable of connecting the deck to the sea bed for extraction of said deposit, characterised in that said intermediate structure comprises at least one double-walled pier 3e with an open lower end, thus offering internally a protected access passage to the sea. <IMAGE> |
