Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B75/00—Building or assembling floating offshore structures, e.g. semi-submersible platforms, SPAR platforms or wind turbine platforms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
  • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
  • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
  • B63B2021/003—Mooring or anchoring equipment, not otherwise provided for
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
  • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
  • B63B2021/505—Methods for installation or mooring of floating offshore platforms on site
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B2231/00—Material used for some parts or elements, or for particular purposes
  • B63B2231/02—Metallic materials
  • B63B2231/04—Irons, steels or ferrous alloys
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B2231/00—Material used for some parts or elements, or for particular purposes
  • B63B2231/60—Concretes

Definitions

• the object of the present invention is a submersible offshore wind platform with blocked thrust, constituted by a concrete-steel mixed structure, according to some features specified in the Italian patent Nr. 0001331996.
• Said Italian patent Nr. 0001331996 relates to a submerged floating platform with the double function of support base for wind plant in combination with a mariculture plant. The whole is implemented by using a partially submerged platform with blocked thrust, ballastable and transportable as far as the site wherein it is anchored to a basement placed onto the seafloor; the anchoring being implemented with connection tie rods apt to support even combined weights, pressures and efforts, due to the floating force and to the outer forces deriving from the sea and from the wind.
• the object of the present invention is to overcome some critical aspects linked to the use of a platform according to the features of the patent Nr. 0001331996, in the specific case relating to the configuration, the materials used in the implementation, the system for anchoring the platform to the basement, as well as the use of the latter as semi-submersible pontoon whereupon the platform in the construction plant is to be constructed and wherewith the same is to be transported from the construction plant to the site.
• the platform object of the present invention is too a submerged platform, with blocked thrust, equipped with an axial-symmetric central body made of prestressed concrete and a peripheral structure made of steel connected thereto by means of a plurality of stiffening members.
• a solution of this kind allows obtaining several advantages: to contain the whole weight of the structure, to guarantee high features of mechanical resistance, to simplify and economize the construction, to allow implementing the platform itself by avoiding or however limiting to resort to qualified building crafts for special processes (welding, etc.).
• Figure 2 represents a plan and a section view of the basement
• Figure 3 represents a plan view of the submerged platform.
• the platform comprises a central body 1 made of prestressed concrete, a peripheral structure made of steel 2 connected to the central body by means of specific inserts made of steel 9 buried in the concrete, tie rods made of steel 10 and a stiffening ring 5.
• the central body is dominated by a tower made of steel 12 supporting the wind turbine.
• Fundamental feature of the present invention is the system for anchoring the platform to the basement 15, comprising a plurality of textile ropes 6 which, anchored downwards the basement 15, extend upwards to penetrate inside the central body 1.
• tensioning systems 11 are placed, planned to allow modifying the length of the ropes, having effect onto the preload of the same, by even a great number of metres.
• the solution further comprises devices 7 and 8 apt to protect the ropes extending outwardly the platform and to minimize/annul the frictions along the route of the same.
• the platform already object of the patent Nr. 0001331996, on the contrary, was characterized by the use of tie rods (for example chains) which at the periphery tied up vertically the platform to the counterweight (basement). Such chains were anchored to the legs of the platform with hydraulic jacks equipped with mechanical safe devices and therefore adjustable in a limited way.
• a platform only made of prestressed concrete comprising a central body tied up, in the lower portion, to a peripheral crown, made of concrete too, would have a weight constituted by 80% by the peripheral portion and by 20 % by the central body.
• the structure wholly made of steel would be relatively light in the peripheral portion, but would require long periods of time, qualified building crafts and high costs for the implementation thereof.
• the structure made of prestressed concrete and steel object of the present invention adds up the advantages of the solutions wholly made of concrete and wholly made of steel, by eliminating the disadvantages thereof.
• the solution of the patent Nr. 0001331996 provided to transport the platform to the site and, subsequently, to anchor it by means of the tie rods to the basement previously arranged onto the seabed.
• the solution of the present invention comprises a basement made of prestressed concrete 15 with free volumes which can be pressurized with air and which can be flooded, which, after the construction thereof, can be used as semi- submersible pontoon for constructing the platform thereupon and the joined transportation basement plus platform from the construction plant to the site.
• the basement during the submersion thereof, remains anchored to the platform standing above, through said rope system 6, which is kept in tension, with positive effect onto the system stability.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• Ocean & Marine Engineering (AREA)
• Architecture (AREA)
• Structural Engineering (AREA)
• Civil Engineering (AREA)
• Wind Motors (AREA)
• Revetment (AREA)
• Artificial Fish Reefs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=41528703

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (14)

Family Cites Families (17)

• 2009
  • 2009-01-13 IT IT000015A patent/ITTO20090015A1/it unknown
• 2010
  • 2010-01-11 WO PCT/IB2010/050088 patent/WO2010082153A2/en not_active Ceased
  • 2010-01-11 US US13/143,648 patent/US20120014752A1/en not_active Abandoned
  • 2010-01-11 EP EP10701736A patent/EP2387528A2/en not_active Withdrawn
  • 2010-01-11 KR KR1020117018816A patent/KR20110118669A/ko not_active Withdrawn
  • 2010-01-11 CN CN2010800043280A patent/CN102438887A/zh active Pending
  • 2010-01-11 JP JP2011545818A patent/JP2012515114A/ja not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events