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EP2558648B1 - Structure de fondations en mer, fondations en mer et son procédé d'établissement - Google Patents

Structure de fondations en mer, fondations en mer et son procédé d'établissement Download PDF

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Publication number
EP2558648B1
EP2558648B1 EP10779288.9A EP10779288A EP2558648B1 EP 2558648 B1 EP2558648 B1 EP 2558648B1 EP 10779288 A EP10779288 A EP 10779288A EP 2558648 B1 EP2558648 B1 EP 2558648B1
Authority
EP
European Patent Office
Prior art keywords
seabed
offshore foundation
tube
foundation structure
main tube
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.)
Not-in-force
Application number
EP10779288.9A
Other languages
German (de)
English (en)
Other versions
EP2558648A2 (fr
Inventor
Henrik Stiesdal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP10779288.9A priority Critical patent/EP2558648B1/fr
Publication of EP2558648A2 publication Critical patent/EP2558648A2/fr
Application granted granted Critical
Publication of EP2558648B1 publication Critical patent/EP2558648B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • E02B17/027—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto steel structures
    • 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
    • E02D27/52—Submerged foundations, i.e. submerged in open water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/20—Placing by pressure or pulling power

Definitions

  • the present invention relates to an offshore foundation structure and, in particular, to a wind turbine offshore foundation structure.
  • the invention relates to an offshore foundation, in particular to a wind turbine offshore foundation, and to a method of establishing such an offshore foundation.
  • a jacket construction is, for example, shown in US 5,988,949 or in EP 2 067 914 A2 , a tripod construction, for example, in DE 10 2004 042 066 A1 .
  • a typical method for establishing a foundation based on a jacked construction or a tripod construction is to prepare the seabed prior to establishing the foundation which includes levelling out variations of the height of the seabed in order to achieve a construction in level. Furthermore, the method comprises establishing piles very accurately positioned in the seabed such as by means of a pre-fabricated and pre-positioned pile positioning template structure on the seabed.
  • GB 2460172 A discloses a method of installing a pile in the seabed in which method a guide structure for the pile is used.
  • the guide structure comprises a tubular column/support that is carried on four footings.
  • a tubular pile which is to be installed into a socket in the seabed is supplied within a vertical column/support, as it is shown in the figure as a hidden component.
  • Each footing stands on an adjustable foot which is capable of being moved through some small distance vertically as well as being attached in the pivotable manner.
  • the guide structure will be totally or partly removed after installing the pile.
  • WO 2009/155639 A1 describes a drilling platform for geological sample drilling.
  • a plurality of legs extend from the platform to the ground and are of variable lengths, which allows the platform to be set horizontally even on uneven ground.
  • WO 2005/040605 A1 describes an offshore foundation for a wind energy plant.
  • the offshore foundation comprises a number of legs with piles located inside the legs. The piles can be rammed into the seabed. From this document the features of the preamble of claim 1 are known.
  • EP 1 707 808 A2 describes feet for an offshore wind energy plant which may be anchored in the seabed by use of piles driven through the feet.
  • the piles are established by using e.g. hydraulic driven means which literally hammer the pile down into the seabed.
  • a jacket or a tripod construction is set over a part of the pile (or piles in case of a tripod construction) and the space between the leg and the pile is grouted to establish a secure connection.
  • the first objective is solved by an offshore foundation structure as claimed in claim 1 and by an offshore foundation as claimed in claim 5.
  • the second objective is solved by a method of establishing an offshore foundation as claimed in claim 9.
  • the depending claims contain further developments of the present invention.
  • An inventive offshore foundation structure which may, in particular, be a wind turbine foundation structure, i.e. a foundation structure for carrying a wind turbine tower comprises at least one leg to be positioned on the seabed.
  • a foundation structure is formed as jacket structure or a tripod structure with three legs resting on the seabed.
  • the at least one leg of the inventive offshore foundation structure comprises an adjusting means which is able to, and prepared for, adjusting the axial length of the leg.
  • the at least one leg comprises: a main tube extending along an axial direction and a seabed plate which is located at the seabed side end of the main tube and prepared to hold the structure at least temporarily on the seabed.
  • a seabed plate tube extends from said seabed plate into said main tube and is prepared to be moved in relation to said main tube in axial direction of said main tube.
  • An adjusting means is present which is able to, and prepared for, adjusting the relative axial position of the main tube and the seabed plate tube to each other.
  • the at least one leg comprises a pile which is adapted to be driven into the seabed.
  • the pile extends at least partly through the seabed plate tube and the main tube. This allows the pile to be located inside the leg or the legs of the offshore foundation structure when the foundation structure is positioned on the seabed and to drive the piles into the seabed after positioning the foundation structure whereby the piles and the driving means for driving the piles can be guided by the main tube and the seabed plate tube.
  • the piles can be established in the seabed after the foundation structure is placed on the seabed through the main tube and the seabed plate tube.
  • the adjusting means can be a jack means which acts between the seabed plate tube and the main tube.
  • the seabed plate tube and/or the main tube can comprise a jack base means which is prepared for holding the jack means and/or for providing support for the jack means.
  • Other adjusting means like, for example, gear wheels acting between the seabed plate tube and the main tube, are in general conceivable.
  • the adjusting means for adjusting the relative axial position of the main tube and the seabed plate tube to each other can be designed such as to be removable from the leg so that it can be reused in another leg.
  • the adjusting means can also be an integral part of the leg so that it remains in the leg after the foundation has been established.
  • jacket structures and tripod structures have been mentioned as typical offshore foundation structures other structures having two, four, or more legs are also conceivable.
  • an offshore foundation established on a seabed is provided.
  • the offshore foundation may, in particular, be a wind turbine offshore foundation.
  • the offshore foundation comprises an inventive offshore foundation structure resting on the seabed.
  • the axial length of the at least one leg is so adjusted as to level out variations of the seabed on which the foundation structure rests.
  • the length of the leg is adjusted by adjusting a relative axial position of a main tube and a seabed plate tube to each other so as to a level out variations of the height of the seabed.
  • the inventive offshore foundation reduces, or even eliminates, the need for levelling out the seabed area on which the foundation is to be established.
  • a space between the main tube and the seabed plate tube of the offshore foundation structure leg may be grouted in order to increase stability of the foundation.
  • the at least one leg of the offshore foundation comprises a pile which is driven into the seabed so as to function as an anchor for the foundation.
  • a pile partly extends through the seabed plate tube and the main tube.
  • a method of establishing an offshore foundation on the seabed, in particular, a wind turbine offshore foundation as described above comprises the steps of positioning an inventive offshore foundation structure and adjusting the offshore foundation structure by use of the adjusting means.
  • the inventive method further comprise the step of anchoring the offshore foundation structure by driving piles into the seabed.
  • the inventive method reduces the need for precisely levelling the seabed since the adjusting means can be designed such as to be able to level out even large variations of height of the seabed in order to achieve a construction in level. Levelling out the seabed before establishing the foundation can therefore be reduced, or even omitted if the seabed variations of the site in which the foundation is to be established are not too large.
  • the foundation structure is first placed on the seabed and then the piles are driven into the seabed through the seabed blade tube and the main tube.
  • the offshore foundation structure for example a space between the pile and the seabed blade tube and/or the main tube may be grouted in order to increase stability of the structure after the pile has been driven into the seabed or the foundation structure has been placed on the pile.
  • a possible offshore foundation structure by which the invention can be realised is a jacket structure as it is shown in Figure 1 in highly schematic view.
  • the jacket structure shown in this figure comprises three legs 11 each forming a tubular hollow foundation member.
  • Another possible offshore foundation structure by which the invention can be realised is the so called tripod structure that is schematically shown in Figure 2 .
  • three legs 11 forming tubular hollow foundation members support a tube 9 carrying an installation like a wind turbine.
  • FIG 3 shows a leg 11 of an inventive foundation structure, which could be either a tripod - or jacket type structure.
  • the leg 11 is equipped with an open longitudinal end 12 which is placed on the seabed 6 such that the open longitudinal end 12 shows towards the seabed 6.
  • the legs 11 are slightly tilted with respect to the vertical direction.
  • Piles 7 may project through the open longitudinal ends 12 of the legs 11 into the seabed 6 to form anchors for the foundation structure.
  • the interior of the longitudinal hollow foundation members 11 may be grouted, in particular the space between the piles 7 and the inside wall of the legs 11, in order to increase stability of the structure.
  • piles as anchors securing the foundation structure in place can also be achieved by anchoring means other than piles or by means of gravitation foundations.
  • Figure 3 shows the seabed end of a leg 11 of a wind turbine foundation structure (e.g. tripod or jacket).
  • a wind turbine foundation structure e.g. tripod or jacket
  • the legs 11 of the wind turbine foundation structure according to the first embodiment comprise(s) for a minimum configuration:
  • the seabed plate tube 2 of the present embodiment is located inside the main tube 3.
  • the main tube 3 and/or the seabed plate tube 2 further comprise(s) jack base means 4 which is prepared for holding the jack means 5 and/or providing support for the jack means 5 and which can withstand the loads applied to the base means 4 by e.g. the weight of the foundation structure through the jack means 5.
  • Figure 4 shows the seabed end of a leg 11 of a wind turbine offshore foundation structure (e.g. tripod or jacket).
  • the foundation structure is further supported in its position by one or more piles 7 penetrating the seabed 6.
  • the piles 7 can be made of e.g. steel, concrete or reinforced concrete or a combination hereof.
  • the piles 7 are established in the seabed 6 after the foundation structure is placed on the seabed such as through the main tube 3 and the seabed plate tube 2 as indicated by the arrow in the figure.
  • the main tube 3 and/or the seabed plate tube 2 may be secured to the pile 7 by grouting the space 10b between the pile 7 and the seabed plate tube 2 and/or the space 10a between the pile 7 and the main tube 3.
  • FIG. 5 An offshore foundation which is not part of the invention as claimed in the appended claims is schematically illustrated in Figure 5 .
  • Figure 5 shows the seabed end of a leg 11 of a wind turbine foundation structure (e.g. tripod or jacket).
  • the seabed plate 1 further comprises a separate pile tube 8 which extends vertically or near vertically from the seabed plate 1 and which is prepared for receiving a pile 7.
  • the piles 7 can be made of e.g. steel, concrete or reinforced concrete or a combination hereof.
  • the piles 7 may be established in the seabed 6 before the foundation structure and the pile tubes 8 of the seabed plate 1 are placed over the piles.
  • the piles 7 may be established in the seabed 6 after the foundation structure is placed on the seabed such as through the pile tube 8.
  • the pile tube 8 may be secured to the pile 7 by grouting the space 10c between the pile 7 and the pile tube 8.
  • the jack means 5 may be e.g. hydraulic operated, pneumatic operated or manually operated.
  • the jack means 5 may be removable so that it can be removed after positioning and possible grouting, or the jack means 5 may be non-removable so that it stays installed after positioning and possible grouting.
  • the invention can furthermore be advantageous in that the piles are established after the foundation structure has been positioned on the seabed. Thereby the piles do not need to be very accurately positioned on/in the seabed prior to positioning the foundation structure such as by a pre-fabricated and prepositioned pile-positioning template structure.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Mechanical Engineering (AREA)
  • Foundations (AREA)
  • Wind Motors (AREA)

Claims (10)

  1. Structure de fondations en mer, en particulier structure de fondations d'éolienne, avec au moins une jambe (11) destinée à être positionnée sur le fond marin (6), dans laquelle l'au moins une jambe (11) comprend :
    - un tube principal (3) s'étendant le long d'un sens axial,
    - une plaque (1) de fond marin qui est située à l'extrémité de côté fond marin (6) du tube principal (3) et préparée pour maintenir la structure au moins temporairement sur le fond marin (6),
    caractérisée en ce que
    l'au moins une jambe (11) comprend en outre :
    - un tube (2) de plaque de fond marin qui s'étend depuis ladite plaque (1) de fond marin jusque dans ledit tube principal (3) et est préparé pour être déplacé par rapport audit tube principal (3) dans le sens axial du tube principal (3),
    - un moyen (5) d'ajustement qui est apte à, et préparé pour, ajuster la longueur axiale de la jambe (11) où le moyen (5) d'ajustement est apte à, et préparé pour, ajuster la position axiale relative du tube principal (3) et du tube (2) de plaque de fond marin l'une par rapport à l'autre, et
    - un pilier (7) qui est adapté à être conduit à travers le tube (2) de plaque de fond marin et le tube principal (3) jusque dans le fond marin (6) et qui s'étend au moins partiellement à travers le tube (2) de plaque de fond marin et le tube principal (3).
  2. Structure de fondations en mer selon la revendication 1, dans laquelle le moyen d'ajustement est un moyen (5) de vérin agissant entre ledit tube (2) de plaque de fond marin et ledit tube principal (3).
  3. Structure de fondations en mer selon la revendication 2, dans laquelle ledit tube de plaque de fond marin et/ou ledit tube principal comprennent/comprend un moyen (4) de base de vérin qui est préparé pour maintenir le moyen (5) de vérin et/ou pour offrir un support pour le moyen (5) de vérin.
  4. Structure de fondations en mer selon l'une quelconque des revendications 1 à 3, dans laquelle le moyen (5) d'ajustement est amovible.
  5. Fondations en mer, en particulier fondations d'éolienne, établies sur un fond marin comprenant une structure de fondations en mer selon l'une quelconque des revendications 1 à 4 qui repose sur le fond marin (6), dans lesquelles la longueur de la jambe (11) est ajustée de manière à niveler des variations de la hauteur du fond marin (6).
  6. Fondations en mer selon la revendication 5, dans lesquelles la longueur de la jambe (11) est ajustée par une position axiale relative ajustée du tube principal (3) et du tube (2) de plaque de fond marin l'une par rapport à l'autre.
  7. Fondations en mer selon la revendication 6, dans lesquelles il y a un espace entre le tube principal (3) et le tube (2) de plaque de fond marin et ledit espace est cimenté.
  8. Fondations en mer selon l'une quelconque des revendications 5 à 7, dans lesquelles l'au moins une jambe comprend un pilier (7) qui est conduit jusque dans le fond marin (6).
  9. Procédé d'établissement de fondations en mer, en particulier de fondations en mer d'éolienne, selon l'une quelconque des revendications 5 à 8 sur le fond marin, le procédé comprenant les étapes de positionnement d'une structure de fondations en mer selon l'une quelconque des revendications 1 à 4, d'ajustement de la structure de fondations en mer en utilisant le moyen (5) d'ajustement et l'étape d'ancrage de la structure de fondations en mer en conduisant des piliers (7) jusque dans le fond marin (6).
  10. Procédé selon la revendication 9, dans lequel la structure de fondations en mer est cimentée.
EP10779288.9A 2010-05-28 2010-11-05 Structure de fondations en mer, fondations en mer et son procédé d'établissement Not-in-force EP2558648B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10779288.9A EP2558648B1 (fr) 2010-05-28 2010-11-05 Structure de fondations en mer, fondations en mer et son procédé d'établissement

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10164280 2010-05-28
PCT/EP2010/066900 WO2011147481A2 (fr) 2010-05-28 2010-11-05 Structure de fondations en mer, fondations en mer et son procédé d'établissement
EP10779288.9A EP2558648B1 (fr) 2010-05-28 2010-11-05 Structure de fondations en mer, fondations en mer et son procédé d'établissement

Publications (2)

Publication Number Publication Date
EP2558648A2 EP2558648A2 (fr) 2013-02-20
EP2558648B1 true EP2558648B1 (fr) 2017-11-01

Family

ID=43571293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10779288.9A Not-in-force EP2558648B1 (fr) 2010-05-28 2010-11-05 Structure de fondations en mer, fondations en mer et son procédé d'établissement

Country Status (2)

Country Link
EP (1) EP2558648B1 (fr)
WO (1) WO2011147481A2 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2019074363A1 (fr) 2017-10-10 2019-04-18 Spt Equipment Bv Système de fondation d'installation d'énergie éolienne en haute mer
NL2028088A (en) 2020-04-29 2021-11-02 Spt Equipment Bv Concrete connector body for an offshore wind turbine.

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
EP2886851A1 (fr) * 2013-12-18 2015-06-24 Openhydro IP Limited Système de turbine hydroélectrique amélioré
GB2536228A (en) * 2015-03-09 2016-09-14 Owec Tower As Apparatus and methods for installing a substructure
CN106049494B (zh) * 2016-07-15 2019-02-15 广州市维众建筑工程有限公司 分体式压桩机
JP6927165B2 (ja) * 2018-07-03 2021-08-25 Ｊｆｅエンジニアリング株式会社 接合構造物、杭式構造物ならびに杭式構造物の撤去方法

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US5988949A (en) 1996-01-11 1999-11-23 Mcdermott Int Inc Offshore jacket installation
DE10349109B4 (de) * 2003-10-17 2008-02-07 Aerodyn Engineering Gmbh Gründung für eine Offshore-Windenergieanlage
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019074363A1 (fr) 2017-10-10 2019-04-18 Spt Equipment Bv Système de fondation d'installation d'énergie éolienne en haute mer
US12110862B2 (en) 2017-10-10 2024-10-08 Spt Equipment B.V. Off shore wind energy installation foundation system
NL2028088A (en) 2020-04-29 2021-11-02 Spt Equipment Bv Concrete connector body for an offshore wind turbine.
WO2021221506A1 (fr) 2020-04-29 2021-11-04 Spt Equipment Bv Fondation d'éolienne en mer

Also Published As

Publication number Publication date
EP2558648A2 (fr) 2013-02-20
WO2011147481A2 (fr) 2011-12-01
WO2011147481A3 (fr) 2012-10-18

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