SANDWICH BASE STRUCTURE FOR OFF-SHORE WIND TURBINES

• US 20120107053A1
• Filed: 08/19/2011
• Published: 05/03/2012
• Est. Priority Date: 08/20/2010
• Status: Abandoned Application

• Current Assignee: Jade Werke GmbH
• Original Assignee: Hilgefort GmbH Anlagenkomponenten Und Apparatebau
• Inventors: Baumfalk, Frank
• Application Number:
  US13/213,207
• Publication Number:
  US 20120107053A1
• Time in Patent Office: Days
• US Class Current: 405/227
• CPC Class Codes: E02B 17/0004 Nodal points
• CPC Class Codes: E02B 17/0008 Methods for grouting offshore structures; apparatus therefor cementing boreholes E21B33/13
• CPC Class Codes: E02B 17/027 steel structures E02B17/021 takes precedence
• CPC Class Codes: E02B 2017/006 with lattice style supporting legs
• CPC Class Codes: E02B 2017/0073 Details of sea bottom engaging footing
• CPC Class Codes: E02B 2017/0091 Offshore structures for wind turbines
• CPC Class Codes: E02D 13/04 Guide devices; Guide frames as parts of the driver scaffold E02D7/16
• CPC Class Codes: E02D 27/42 Foundations for poles, masts or chimneys sockets or holders for poles or masts per se E04H12/22
• CPC Class Codes: E02D 27/425 specially adapted for wind motors masts wind motors per se F03D1/00
• CPC Class Codes: E02D 27/52 Submerged foundations , i.e. submerged in open water E02D27/12 - E02D27/24 take precedence
• CPC Class Codes: E02D 5/40 in open water
• CPC Class Codes: E02D 7/20 Placing by pressure or pulling power
• CPC Class Codes: F03D 13/22 Foundations specially adapted for wind motors
• CPC Class Codes: F05B 2240/95 offshore
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction
• CPC Class Codes: Y02E 10/727 Offshore wind turbines

Abstract

The invention relates to a base structure (1) for an off-shore wind power installation having at least a plurality of, in particular three, bases piles (2, 3,, 4), and a support structure (5) connecting the upper ends of the base piles (2, 3, 4) for the pylon of the wind power installation. Furthermore each base pile (2, 3, 4) has a wall comprising a plurality of layers (19, 20, 21) of differing material substantially over its entire length, wherein the wall is formed from at least one surface portion, having an inner layer (19) and an outer layer (20) and wherein a core material is arranged between the inner layer (19) and the outer layer (20) as an intermediate layer (21).

Claims

1. A base structure (1) for an off-shore wind power installation having at least a plurality of, in particular three, bases pile (2, 3, 4), and a support structure (5) connecting the upper ends of the base piles (2, 3, 4) for the pylon of the wind power installation,

characterised in that each base pile (2, 3, 4) has a wall comprising a plurality of layers (19, 20, 21) of differing material substantially over its entire length, wherein the wall is formed from at least one surface portion having an inner layer (19) and an outer layer (20) and wherein a core material is arranged between the inner layer (19) and the outer layer (20) as an intermediate layer (21).

2. A base structure as set forth in claim 1 characterised in that the inner layer (19) is in the form of an inner tube and the outer tube (20) is in the form of an outer tube extending at a spacing relative to the inner tube (19).

3. A base structure as set forth in claim 2 characterised in that the core material is concrete,

4. A base structure as set forth in claim 2 or claim 3 characterised in that the core material is strengthened with reinforcement (131, 132).

5. A base structure as set forth in one of the preceding claims characterised in that the base piles (2, 3, 4) are of an axial length such that at an installation location they extend from the seabed (10) to above a surface of water (14).

6. A base structure as set forth in one of the preceding claims characterised in that the base pile (2, 3, 4) is of a diameter in a range of between 2500 mm and 3500 mm and is preferably about 300 mm, the inner layer (19) and/or the outer layer (10) are of a wall thickness in a range of between 12 mm and 20 mm and the thickness of the core material is preferably in a range of between 60 mm and 120 mm.

7. A base structure as set forth in one of claims 1 through 6 characterised in that at least one further partial region having a plurality of layers, namely an inner layer (117), an outer layer (119) and an intermediate layer (121) is in the form of at least one tube portion (6′

) of a bar (6, 7, 8) of the lattice-like support structure (5) which is composed of a plurality of bars.

8. A base structure as set forth in claim 7 characterised in that the inner layer (117) is in the form of an inner tube and the outer layer (119) is in the form of an outer tube (119) extending at a spacing relative to the inner tube (117), between which is provided the intermediate layer (121), in particular of concrete.

9. A base structure as set forth in one of the preceding claims characterised in that arranged at at least one and preferably two axial ends of a base pile (2, 3, 4) and/or a bar (6, 7, 8) is a sandwich connection (50, 250, 350) which connects the inner layer (19, 117) and the outer layer (20, 119) and which in the axial direction forms a prolongation of the base pile (2, 3, 4) and/or the bar (6, 7, 8) in the form of a connecting tube,

10. A base structure as set forth in claim 9 characterised in that the sandwich connection (50, 250, 350) has a ring flange (52, 252, 352) which is substantially conical in cross-section, wherein the ring flange is connected at one end to the inner layer (19, 117) and the outer layer (20, 119) and at the other end to a connecting tube (51, 251, 351).

11. A base structure as set forth in claim 10 characterised in that the ring flange (52, 252, 352) has openings (71) for receiving reinforcing bars (33, 233).

12. A base structure as set forth in one of claims 9 through 11 characterised by at least one connecting body having two or more connecting tubes for connection, in particular welding, to connecting tubes or sandwich connections (50, 250, 350) of a respective base pile (2, 3, 4) and at least one bar (6, 7, 8) of the support structure (5).

13. A base structure as set forth in claim 12 characterised in that the connecting body is formed from pre-assembled tube portions.

14. A base structure as set forth in one of claims 7 through 13 characterised in that at at least one of its end regions each tube portion (6′

) is provided with a bulkhead (23, 24) which sealingly closes at least its free cross-section.

15. A base structure as set forth in one of the preceding claims characterised in that each tube portion (6′

) has at its end at least one annular connecting flange extending in a plane oriented perpendicularly to the center line of the tube portion (6′

).