EP1988219A1 - Monopile foundation - Google Patents
Monopile foundation Download PDFInfo
- Publication number
- EP1988219A1 EP1988219A1 EP07460009A EP07460009A EP1988219A1 EP 1988219 A1 EP1988219 A1 EP 1988219A1 EP 07460009 A EP07460009 A EP 07460009A EP 07460009 A EP07460009 A EP 07460009A EP 1988219 A1 EP1988219 A1 EP 1988219A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resistance plate
- foundation
- water area
- monopile
- foundation pile
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
Definitions
- the subject of invention consists of a monopile foundation sunk into the bottom of a water area and designated for the purpose of fixing a wind power plant thereon.
- a monopile foundation is commonly used in sea, offshore wind power farms, such as, for instance, the Horns Rev farm in Denmark, or the Burbo farm in the UK.
- the Polish patent application no. P. 347733 features a wind turbine for electric power generation which has two rotors fixed firmly to the tower; the tower is placed on its foundation via bearings, thanks to which it may rotate, along with the rotors, perpendicularly to the wind direction, steered by a back rudder.
- a disadvantage of such solutions consists in that, along with an increase in the rated power of a wind power plant, the force of the pressure exerted on the ground at the bottom of the water area where the monopile foundation is set increases as well, which, in turn, requires to increase the diameter of the foundation pile accordingly.
- the monopile foundation of a contemporary wind power plant of output 5 MW requires a pile having a diameter of over 5 metres; hammering or drilling such a thick pile into the bottom involves large engineering difficulties.
- the resistance plate has at its bottom side edges situated on the external and internal perimeter of the plate, the blades of which are directed downwards, at the angle from 10° to 50°.
- the subject of invention is illustrated, as sample of performance, by a drawing presenting rotary-wise a monopile foundation in an axial section.
- the monopile foundation sunk into the bottom of a water area and designated to fix a wind power plant thereon includes a foundation pile 1 , a resistance plate surrounding it 2 , placed on the water area bottom, and gravel or other loose and hard material 4 , put into the space between the external surface of the foundation pile and the internal surface of the resistance plate, which elements co-operate with each other.
- the resistance plate has at its bottom side edges 3 , situated on the external and internal perimeter of the plate, the blades of which are directed downwards, at the angle from 10° to 50°.
- the co-operation of individual elements of the device as per invention consists in that the pressure force of the wind on the wind turbine rotor causes reaction forces exerting pressure on the foundation.
- reaction forces consist in cutting forces in the ground around the foundation pile
- second part of these reaction forces consist in friction force at the junction of the surface of the water area bottom with the bottom side of the resistance plate.
- the volume of such friction force depends on the weight of the resistance plate and a degree of roughness of its bottom part.
- the resistance plate be made of heavy concrete the mass density of which is at least 3 g/cm 3 .
- a layer of gravel or other loose and hard material put into the space between the external surface of the foundation pile and the internal surface of the resistance plate ring is to transfer the horizontal force from the foundation pile to the resistance plate and, on the other hand, to ensure free settlement of the resistance plate on the bottom.
- a considerable advantage of the invention consists in the possibility to apply a shorter monopile foundation of length equal to approximately one and a half of the height of the resistance plate, because the arm of the bending moment is reduced and at the same time the land around the monopile foundation gets denser, allowing to carry larger cutting forces.
- Another large advantage of the invention consists in the possibility to apply a single pillar foundation of smaller diameter in the case of a shallow water area, allowing to save on steel consumption.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
Abstract
Description
- The subject of invention consists of a monopile foundation sunk into the bottom of a water area and designated for the purpose of fixing a wind power plant thereon.
- A monopile foundation is commonly used in sea, offshore wind power farms, such as, for instance, the Horns Rev farm in Denmark, or the Burbo farm in the UK.
- The Polish patent application no.
P. 347733 - A disadvantage of such solutions consists in that, along with an increase in the rated power of a wind power plant, the force of the pressure exerted on the ground at the bottom of the water area where the monopile foundation is set increases as well, which, in turn, requires to increase the diameter of the foundation pile accordingly. For instance, the monopile foundation of a contemporary wind power plant of output 5 MW requires a pile having a diameter of over 5 metres; hammering or drilling such a thick pile into the bottom involves large engineering difficulties.
- In the case of two generating sets having power output 5 MW each which are fixed on the tower of a wind power plant constructed according to the Polish patent application no.
P. 347733 - Disadvantages of the existing solutions have been removed by developing the monopile foundation, sunk into the bottom of a water area and designated for the purpose of fixing a wind power plant thereon, including a foundation pile which, according to the invention, is complete with a resistance plate surrounding it, placed on the water area bottom, and gravel or other loose and hard material, put into the space between the external surface of the foundation pile and the internal surface of the resistance plate, which elements co-operate with each other.
- Advantageously, the resistance plate has at its bottom side edges situated on the external and internal perimeter of the plate, the blades of which are directed downwards, at the angle from 10° to 50°.
- The subject of invention is illustrated, as sample of performance, by a drawing presenting rotary-wise a monopile foundation in an axial section.
- The monopile foundation, sunk into the bottom of a water area and designated to fix a wind power plant thereon includes a foundation pile 1, a resistance plate surrounding it 2, placed on the water area bottom, and gravel or other loose and
hard material 4, put into the space between the external surface of the foundation pile and the internal surface of the resistance plate, which elements co-operate with each other. - The resistance plate has at its
bottom side edges 3, situated on the external and internal perimeter of the plate, the blades of which are directed downwards, at the angle from 10° to 50°. - The co-operation of individual elements of the device as per invention consists in that the pressure force of the wind on the wind turbine rotor causes reaction forces exerting pressure on the foundation.
- One part of the above reaction forces consist in cutting forces in the ground around the foundation pile, whereas the second part of these reaction forces consist in friction force at the junction of the surface of the water area bottom with the bottom side of the resistance plate. The volume of such friction force depends on the weight of the resistance plate and a degree of roughness of its bottom part.
- To increase the friction forces' effect, it is advantageous to use a material of large mass density to make the resistance plate, because the weight of such resistance plate submerged in the water is smaller than its weight in the air, by the weight of the amount of water displaced by it.
- It is recommended that the resistance plate be made of heavy concrete the mass density of which is at least 3 g/cm3.
- A layer of gravel or other loose and hard material put into the space between the external surface of the foundation pile and the internal surface of the resistance plate ring is to transfer the horizontal force from the foundation pile to the resistance plate and, on the other hand, to ensure free settlement of the resistance plate on the bottom.
- A considerable advantage of the invention consists in the possibility to apply a shorter monopile foundation of length equal to approximately one and a half of the height of the resistance plate, because the arm of the bending moment is reduced and at the same time the land around the monopile foundation gets denser, allowing to carry larger cutting forces.
- Another large advantage of the invention consists in the possibility to apply a single pillar foundation of smaller diameter in the case of a shallow water area, allowing to save on steel consumption.
Claims (2)
- The monopile foundation, sunk into the bottom of a water area and designated for the purpose of fixing a wind power plant thereon, including a foundation pile characterised in, that it is complete with a resistance plate surrounding it (2), placed on the water area bottom, and gravel or other loose and hard material (4), put into the space between the external surface of the foundation pile and the internal surface of the resistance plate, which elements co-operate with each other.
- The monopile foundation, according to claim 1, characterised in, that the resistance plate has at its bottom side edges (3), situated on the external and internal perimeter of the plate, the blades of which are directed downwards, at the angle from 10° to 50°.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07460009A EP1988219A1 (en) | 2007-05-04 | 2007-05-04 | Monopile foundation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07460009A EP1988219A1 (en) | 2007-05-04 | 2007-05-04 | Monopile foundation |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1988219A1 true EP1988219A1 (en) | 2008-11-05 |
Family
ID=38472903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07460009A Withdrawn EP1988219A1 (en) | 2007-05-04 | 2007-05-04 | Monopile foundation |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1988219A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010015533B3 (en) * | 2010-04-16 | 2011-05-05 | Voith Patent Gmbh | Anchoring element for a hydraulic system |
US8596919B2 (en) | 2010-11-23 | 2013-12-03 | Technip France | Anti-scour disk and method |
EP3103924A1 (en) * | 2015-06-09 | 2016-12-14 | RWE Innogy GmbH | Monopile foundation for an offshore tower structure |
CN112942407A (en) * | 2021-02-22 | 2021-06-11 | 中国长江三峡集团有限公司 | Offshore wind power single pile-friction wing composite foundation and construction method thereof |
WO2023001879A1 (en) | 2021-07-23 | 2023-01-26 | Vallourec Deutschland Gmbh | Assembly for installing an above-surface structure in water-covered ground, in particular for the monopile-installation of an offshore wind turbine, and method for mounting same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6434383A (en) | 1987-07-31 | 1989-02-03 | Tadashi Kikuchi | Construction method for erecting support for backnet and foundation block |
JP2001295298A (en) | 2000-04-13 | 2001-10-26 | Ichiro Abe | Foundation for columnar structure and its work execution method |
DE10105472A1 (en) * | 2001-02-05 | 2002-08-22 | Straeb Gmbh & Co Geb | Height-adjustable foundation for posts for traffic signs etc. has tubular holder with hollow crumple zone filled and enclosed by soft mortar encasing material |
WO2004101898A2 (en) * | 2003-05-13 | 2004-11-25 | Aloys Wobben | Foundation for a wind energy plant |
JP2005069025A (en) * | 2003-08-27 | 2005-03-17 | Mitsui Eng & Shipbuild Co Ltd | Substructure and installation method for ocean wind power generation device |
US20060048471A1 (en) * | 2004-09-06 | 2006-03-09 | Research Institute Of Industrial Science & Technology | Strengthening device to increase strength of grout layer |
-
2007
- 2007-05-04 EP EP07460009A patent/EP1988219A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6434383A (en) | 1987-07-31 | 1989-02-03 | Tadashi Kikuchi | Construction method for erecting support for backnet and foundation block |
JP2001295298A (en) | 2000-04-13 | 2001-10-26 | Ichiro Abe | Foundation for columnar structure and its work execution method |
DE10105472A1 (en) * | 2001-02-05 | 2002-08-22 | Straeb Gmbh & Co Geb | Height-adjustable foundation for posts for traffic signs etc. has tubular holder with hollow crumple zone filled and enclosed by soft mortar encasing material |
WO2004101898A2 (en) * | 2003-05-13 | 2004-11-25 | Aloys Wobben | Foundation for a wind energy plant |
JP2005069025A (en) * | 2003-08-27 | 2005-03-17 | Mitsui Eng & Shipbuild Co Ltd | Substructure and installation method for ocean wind power generation device |
US20060048471A1 (en) * | 2004-09-06 | 2006-03-09 | Research Institute Of Industrial Science & Technology | Strengthening device to increase strength of grout layer |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010015533B3 (en) * | 2010-04-16 | 2011-05-05 | Voith Patent Gmbh | Anchoring element for a hydraulic system |
WO2011128006A1 (en) | 2010-04-16 | 2011-10-20 | Voith Patent Gmbh | Anchoring element for a hydraulic engineering installation |
US8596919B2 (en) | 2010-11-23 | 2013-12-03 | Technip France | Anti-scour disk and method |
EP3103924A1 (en) * | 2015-06-09 | 2016-12-14 | RWE Innogy GmbH | Monopile foundation for an offshore tower structure |
WO2016198272A1 (en) * | 2015-06-09 | 2016-12-15 | Rwe Innogy Gmbh | Monopile foundation for an offshore tower structure |
CN112942407A (en) * | 2021-02-22 | 2021-06-11 | 中国长江三峡集团有限公司 | Offshore wind power single pile-friction wing composite foundation and construction method thereof |
WO2023001879A1 (en) | 2021-07-23 | 2023-01-26 | Vallourec Deutschland Gmbh | Assembly for installing an above-surface structure in water-covered ground, in particular for the monopile-installation of an offshore wind turbine, and method for mounting same |
DE102021119100A1 (en) | 2021-07-23 | 2023-01-26 | Vallourec Deutschland Gmbh | Arrangement for the foundation of a high structure in water-covered ground, in particular for the monopile foundation of an offshore wind turbine, and assembly method therefor |
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