WO2010082153A2 - Submersible platform with blocked thrust for offshore wind plants in open sea in concrete-steel hybrid solution - Google Patents

Submersible platform with blocked thrust for offshore wind plants in open sea in concrete-steel hybrid solution Download PDF

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Publication number
WO2010082153A2
WO2010082153A2 PCT/IB2010/050088 IB2010050088W WO2010082153A2 WO 2010082153 A2 WO2010082153 A2 WO 2010082153A2 IB 2010050088 W IB2010050088 W IB 2010050088W WO 2010082153 A2 WO2010082153 A2 WO 2010082153A2
Authority
WO
WIPO (PCT)
Prior art keywords
platform
basement
concrete
steel
cables
Prior art date
Application number
PCT/IB2010/050088
Other languages
French (fr)
Other versions
WO2010082153A3 (en
Inventor
Silvestro Caruso
Original Assignee
Blue H Intellectual Properties Cyprus Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Blue H Intellectual Properties Cyprus Limited filed Critical Blue H Intellectual Properties Cyprus Limited
Priority to US13/143,648 priority Critical patent/US20120014752A1/en
Priority to CN2010800043280A priority patent/CN102438887A/en
Priority to EP10701736A priority patent/EP2387528A2/en
Priority to JP2011545818A priority patent/JP2012515114A/en
Publication of WO2010082153A2 publication Critical patent/WO2010082153A2/en
Publication of WO2010082153A3 publication Critical patent/WO2010082153A3/en

Links

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)

Abstract

The invention refers to a tension-legged offshore submerged platform, in hybrid concrete-steel solution, having a pre-stressed concrete central body (1), a steel peripheral structure (2), which is connected to the central body through steel stiffeners (9), (10), (5). The invention refers further to a basement (15) for such a platform.

Description

Technical description of the industrial invention with title:
Submersible platform with blocked thrust for offshore wind plants in open sea in concrete-steel hybrid solution
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.).
The detailed description of the invention will refer specifically to tables 1/3 to 3/3 wherein a preferred embodiment example of the present invention is represented, absolutely not for limitative purposes. In particular: • Figure 1 represents a scheme of the general configuration of the system;
• Figure 2 represents a plan and a section view of the basement;
• Figure 3 represents a plan view of the submerged platform.
As it can be seen from the above-mentioned figures, 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. At the top of the central body, 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. This feature also allows compensating the possible vertical settling of the basement 15, even by several metres, consequent to the action of the various marine currents, above all in sites with a huge layer of sand, by acting simply from the inside of the platform. 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. In such case, the length of the chains had to be defined based upon the depth and condition of the seabed, so that the wished preload onto the tie rods was implemented. This requested to perform precise surveys of the seabed. Furthermore, during installation, and then for maintenance purposes, the reference solution requested the use of scuba divers. These problems are overcome in the present invention thanks to the use of said textile ropes 6 with related tensioning system incorporated at the top of the central body 1.
Furthermore, as far as the use of the materials is concerned, 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. On the other hand, 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. On the contrary, 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. Furthermore, during the unit installation, 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.

Claims

1) Tension- legged offshore submerged platform, in hybrid concrete-steel solution, characterized by a pre-stressed concrete central body (1), a steel peripheral structure (2), which is connected to the central body through steel stiffeners (9), (10), (5).
2) Platform according to claim 1, also characterized by an anchorage system of the platform to basement (15), comprising a plurality of textile cables (6), which are anchored downwards to the basement (15) and extend upwards until they penetrate inside cylindrical body (1), and at least one stressing system (11), with the purpose of modifying cables length, having an effect on preloading of cables themselves, said stressing system being located at the top of cylindrical body.
3) Basement (15) for a platform according to claims 1 or 2, realized in prestressed concrete, including free volumes, which are pressurizable with air and floodable, characterized for its use as semi-submerged pontoon for platform construction on it and for the jointed transport basement with platform from building yard to site.
4) Basement according to claim 3, characterized in that during its immersion, in the phase of unit installing, it remains anchored to overhanging platform, partially submerged, by means of said cables system (6), maintained in tension.
PCT/IB2010/050088 2009-01-13 2010-01-11 Submersible platform with blocked thrust for offshore wind plants in open sea in concrete-steel hybrid solution WO2010082153A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US13/143,648 US20120014752A1 (en) 2009-01-13 2010-01-11 Submersible Platform With Blocked Thrust For Offshore Wind Plants In Open Sea In Concrete-Steel Hybrid Solution
CN2010800043280A CN102438887A (en) 2009-01-13 2010-01-11 Submersible platform with blocked thrust for offshore wind plants in open sea in concrete-steel hybrid solution
EP10701736A EP2387528A2 (en) 2009-01-13 2010-01-11 Submersible platform with blocked thrust for offshore wind plants in open sea in concrete-steel hybrid solution
JP2011545818A JP2012515114A (en) 2009-01-13 2010-01-11 Submersible platform with block thrust for offshore offshore wind farms in a mixed concrete-steel solution

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2009A000015 2009-01-13
IT000015A ITTO20090015A1 (en) 2009-01-13 2009-01-13 SUBMERSIBLE PUSH-MOUNTED PLATFORM FOR BLIND OFFSHORE PLANTS IN OPEN SEA IN HYBRID CONCRETE-STEEL SOLUTION

Publications (2)

Publication Number Publication Date
WO2010082153A2 true WO2010082153A2 (en) 2010-07-22
WO2010082153A3 WO2010082153A3 (en) 2010-12-29

Family

ID=41528703

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/050088 WO2010082153A2 (en) 2009-01-13 2010-01-11 Submersible platform with blocked thrust for offshore wind plants in open sea in concrete-steel hybrid solution

Country Status (7)

Country Link
US (1) US20120014752A1 (en)
EP (1) EP2387528A2 (en)
JP (1) JP2012515114A (en)
KR (1) KR20110118669A (en)
CN (1) CN102438887A (en)
IT (1) ITTO20090015A1 (en)
WO (1) WO2010082153A2 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP2743170A1 (en) 2012-12-14 2014-06-18 Alstom Wind, S.L.U. Tension leg platform structure for a wind turbine with pre-stressed tendons
GB2503104B (en) * 2012-05-29 2016-10-19 Lunar Energy Power Ltd Apparatus and method for a submersible platform having attachment means for a plurality of energy-producing devices

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DK2635489T3 (en) 2010-11-04 2019-05-27 Univ Maine System Liquid hybrid composite wind turbine platform and tower system
US9394035B2 (en) * 2010-11-04 2016-07-19 University Of Maine System Board Of Trustees Floating wind turbine platform and method of assembling
US8662793B2 (en) * 2011-05-20 2014-03-04 Carlos Wong Floating wind farm with energy storage facility
WO2013155521A1 (en) * 2012-04-13 2013-10-17 University Of Main System Board Of Trustees Floating wind turbine platform and method of assembling
CN102691627B (en) * 2012-05-21 2014-03-05 李树广 Vertical wind power generation system of multi-layer reinforced concrete frame and butt combined fan blade
US9959979B2 (en) * 2013-02-19 2018-05-01 Kemet Electronics Corporation Low ESR capacitor
US9856621B2 (en) 2013-09-09 2018-01-02 Dbd Systems, Llc Method of construction, installation, and deployment of an offshore wind turbine on a concrete tension leg platform
JP6241011B2 (en) * 2013-10-16 2017-12-06 上野　康男 Floating wind turbine mooring device
US11939032B2 (en) 2019-02-21 2024-03-26 Vl Offshore, Llc Floating-type foundation for supporting a wind power generation system and including a stabilized power cable, system of floating-type foundations, and a method of stabilizing the power cable
US11014637B2 (en) 2019-02-21 2021-05-25 Vl Offshore, Llc Motion-attenuated semi-submersible floating-type foundation for supporting a wind power generation system
WO2020253928A1 (en) * 2019-06-21 2020-12-24 Vestas Wind Systems A/S Improvements relating to reinforcement of wind turbine towers
WO2023098994A1 (en) 2021-12-01 2023-06-08 Maridea B.V. Floating foundation for an offshore wind turbine
NL2032274B1 (en) 2022-06-24 2024-01-09 Maridea B V Floating Foundation and Method of Construction
DE102023100270A1 (en) * 2023-01-09 2024-07-11 Universität Rostock, Körperschaft des öffentlichen Rechts Floating platform

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FR1327924A (en) 1962-04-13 1963-05-24 Equipements D Entpr S Soc Et Platform intended for installation in deep water
WO2002010589A1 (en) 2000-07-27 2002-02-07 Christoffer Hannevig Floating structure for mounting a wind turbine offshore
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Cited By (3)

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Publication number Priority date Publication date Assignee Title
GB2503104B (en) * 2012-05-29 2016-10-19 Lunar Energy Power Ltd Apparatus and method for a submersible platform having attachment means for a plurality of energy-producing devices
EP2743170A1 (en) 2012-12-14 2014-06-18 Alstom Wind, S.L.U. Tension leg platform structure for a wind turbine with pre-stressed tendons
US9902468B2 (en) 2012-12-14 2018-02-27 Ge Renewable Technologies Wind B.V. Tension leg platform structure for a wind turbine

Also Published As

Publication number Publication date
US20120014752A1 (en) 2012-01-19
WO2010082153A3 (en) 2010-12-29
CN102438887A (en) 2012-05-02
ITTO20090015A1 (en) 2010-07-14
EP2387528A2 (en) 2011-11-23
JP2012515114A (en) 2012-07-05
KR20110118669A (en) 2011-10-31

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