EP2698476B1 - Procédé de fondation d'un ouvrage offshore et fondation pour un ouvrage offshore - Google Patents

Procédé de fondation d'un ouvrage offshore et fondation pour un ouvrage offshore Download PDF

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Publication number
EP2698476B1
EP2698476B1 EP13172594.7A EP13172594A EP2698476B1 EP 2698476 B1 EP2698476 B1 EP 2698476B1 EP 13172594 A EP13172594 A EP 13172594A EP 2698476 B1 EP2698476 B1 EP 2698476B1
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EP
European Patent Office
Prior art keywords
foundation pile
foundation
filling
pile
sea bed
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.)
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Application number
EP13172594.7A
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German (de)
English (en)
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EP2698476A1 (fr
Inventor
Daniel Bartminn
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.)
Innogy SE
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RWE Innogy GmbH
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Publication date
Application filed by RWE Innogy GmbH filed Critical RWE Innogy GmbH
Publication of EP2698476A1 publication Critical patent/EP2698476A1/fr
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    • 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
    • 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
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing

Definitions

  • the invention relates to a method for establishing an offshore structure with an anchoring structure and at least one foundation pile set in the seabed, wherein at least a part of the structure is fixed within the foundation pile under load transfer in the seabed and is poured within the foundation pile using a curable composition ,
  • the invention further relates to a foundation of an offshore structure having at least one anchoring structure with at least one foundation pile inserted into the seabed, wherein at least part of the structure is inserted under load transfer into the seabed in the foundation pile and this is shed.
  • a method and a foundation of the aforementioned type is for example from the WO 2011/010937 A1 or even the GB 2476051 A known.
  • the WO 2011/010937 A1 More specifically, it relates to a method of controlling the load transfer between a structure and a foundation pile during the potting of the structure in the foundation pile.
  • the in the WO 2011/010937 A1 described structure comprises a support leg, for example, a jacket foundation, which is cast in a foundation pile in the seabed.
  • the support leg includes a cuff attached to the support leg such that the support leg with a designated embedment length can dip into the foundation pile and the load of the structure is removed through the cuff into the foundation pile as long as the support leg within the foundation pile is not yet cast and as long as the potting compound is not yet cured.
  • An adjustment or fine adjustment of the integration length of the support leg via spacers, which are placed between the sleeve and the foundation pile.
  • Offshore foundations are often designed as pile foundations, with one or more foundation piles usually being driven into the seabed.
  • an anchorage structure for example in the form of a so-called jacket foundation is placed on this.
  • the jacket foundation will later accommodate a transition piece and a structure built on the transition piece.
  • the support legs of the structure may for example be provided with so-called pile sleeves, which are interspersed in the installation position of the foundation piles, alternatively, the support legs can be immersed in the foundation piles and cast with them.
  • jacket foundations or other anchoring structures comprise a plurality of support legs, so that in order to produce the foundation, several foundation piles are to be driven into the seabed. Due to geological inhomogeneities of the subsoil, it is not always possible to ram the foundation piles into the seabed with exactly the same depth of penetration. To be able to compensate for any height differences, for example, in the in the WO 2011/010937 A1 described method, between the provided on the support legs of the structure cuffs (brackets) and the circumferential end face of the foundation piles shims provided. The cuffs are used to remove the load of the structure into the foundation piles before the connection is potted and the hardenable potting compound discharges the load into the seabed.
  • the invention is therefore based on the object to improve a method of the type mentioned in this regard.
  • the invention is further based on the object to provide a foundation of the type mentioned, with which the aforementioned method is particularly easy to carry out.
  • the object underlying the invention is first achieved by a method for establishing an offshore structure with an anchoring structure and at least one set in the seabed foundation pile, wherein at least a portion of the structure is fixed within the foundation pile under load transfer into the seabed and within the foundation pile using a hardenable mass, the method being characterized in particular by providing the foundation pile with a load-bearing self-leveling filling up to a predetermined level before the structure is put in place, by applying the structure to the filling under load transfer into the seabed and / or or is deposited in the foundation pile and that the potting compound is introduced after discontinuation of the structure on the filling.
  • brackets collars, collars, Absetzkonsolen
  • brackets on the support legs of the structure completely waive and to accomplish a leveling over the adjustment of the level of a filling within the foundation piles or a single foundation pile so.
  • the support legs can simply be placed on the correspondingly leveled filling. This results in a load transfer on the filling of the foundation pile.
  • a self-compacting flowable concrete or Vergußharzschlämme is introduced into the foundation pile as a filling.
  • the concrete is so fluid that a self-leveling of the concrete occurs, without it being necessary to additionally compact the concrete with conventional vibratory compacting measures.
  • the inventive method is intended to ram one or more foundation piles as cylindrical steel pipes in the seabed. After ramming the foundation pile, it is drilled and / or rinsed and filled with a self-compacting, self-leveling, flowable concrete to a level that defines the depth of embedment or embedment length of the support leg of the structure to be used in the foundation pile. When introducing several foundation piles, these are expediently filled to the same level.
  • the support legs of the structure can be deposited on the hardened filling, so that initially takes place a load transfer on the filling in the seabed. This inevitably takes place a load transfer on the hardened filling and frictional and / or positive fit on the foundation pile in the seabed.
  • the structure is pre-fixed in the circumferential direction before casting within the foundation pile.
  • the level of filling within the foundation pile is selected depending on a planned embedment length of the structure within the foundation pile.
  • ribs or the like projections may be embedded so that the filling enters into a positive connection with the foundation pile and the load is carried out both on the filling and on the foundation pile in the seabed.
  • the structure is deposited on the filling with the interposition of an elastomeric material.
  • an elastomeric material on the filling can be used to compensate for slight differences in level after hardening of the filling.
  • an elastomeric material and spacers can be placed on the filling before the structure is discontinued.
  • the structure is fixed and / or centered within the foundation pile prior to casting by means of wedges in order to prevent relative movements between the foundation pile and the structure from occurring during hardening of the subsequently introduced casting compound which are, for example, wave-induced and / or wind-induced and would have the consequence that no adequate material bond is formed between the structure and the potting compound introduced.
  • the object underlying the invention is further achieved by a foundation of an offshore structure with at least one anchoring structure and with at least one inserted into the seabed Foundation pile, wherein at least part of the structure is inserted into and buried in the foundation pile under load transfer into the seabed, the foundation being characterized in that the part of the structure embedded in the foundation pile is intercepted exclusively within the foundation pile, that is, that the structure according to the invention is free of so-called brackets or similar means for load transfer on the front side of the foundation pile.
  • the structure has at least one support leg which stands on a concrete base within the foundation pile.
  • the foundation is designed as a jacket foundation, which has a plurality of support legs.
  • the support legs have no retaining clips, cuffs or brackets.
  • FIG. 1 is denoted by 1 a support leg 1 as part of an anchoring structure of an offshore structure.
  • the anchoring structure will hereinafter be referred to as structure.
  • This structure is designed for example as a so-called jacket foundation with a plurality of support legs 1, which receives a transition piece (transition piece) and a building erected thereon, for example in the form of a tower with a wind power generator.
  • the support leg 1 dives over a predetermined embedding length in a foundation pile 2, which is designed for example as a steel pipe and was rammed into the seabed 3. After ramming the foundation pile 2 this was drilled or rinsed, that is freed over an intended length of the sediment / rock penetrated into these.
  • a filling 4 in the form of a flowable self-compacting concrete, potting resin, sand or similar material is introduced into the foundation pile 2.
  • the foundation pile 2 is in the area where it receives the filling 4, provided with Scheer plugs 5, which extend radially inwardly into the foundation pile 2 and 4 in the filling.
  • the filling 4 is introduced to a level in the foundation pile 2, which was selected depending on a planned embedding length of the support leg 1 within the foundation pile 2.
  • the support leg can also be deposited in the ground in the pile and can be dispensed with the decay.
  • the jacket foundation as a structure may have a total of three support legs 1, which are each received by a foundation pile 2.
  • a filling 4 is then introduced according to the planned level of the foundation and the planned embedding length of the support legs 1.
  • the structure After curing of the filling 4, the structure is deposited so that the support leg 1 or in the case of multiple support legs all support legs is placed on the filling 4, such that the load of the structure on the filling 4 and the foundation pile 2 registered in the seabed 3 becomes.
  • the support leg 1 is formed, for example, columnar and on his Outside with shear ribs 6 provided.
  • the support leg 3 is expediently provided with a support leg 9, which, as shown in the FIGS. 3 and 4 can be seen, may consist of cross-shaped steel webs.
  • the wedges 10 can be connected via a corresponding device, which in FIG. 3 only hinted at, be suspended. These wedges 10 ensure that in the circumferential direction no relative movement between the support leg 1 and the foundation pile 2 can take place as long as the potting compound 8 is not yet cured and stable.
  • the securing by means of the wedges 10 takes place primarily to prevent relative movements induced by wave impact or wind load.
  • a position assurance during curing can be achieved and proven even without wedges. This requires a scheduled, tolerance-free storage.
  • In four-legged or multi-legged jackets can be a statically determined storage on three points achieve that scheduled only three support feet placed on the same level and the fourth (fifth ...) leg is not planned on the filling.
  • the leg opposite the free leg is filled or weighted accordingly, so that the overall center of gravity is within the three resting points.
  • the backfilling is chosen so that lifting forces occurring due to waves and / or wind loads are compensated.
  • the fourth "free" leg is relined by an elastomer to prevent tilting with temporarily occurring higher waves and / or wind loads. Lateral forces are removed by friction in the pile.

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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)

Claims (11)

  1. Procédé de fondation d'un ouvrage offshore avec une structure d'ancrage et au moins un pieu de fondation (2) inséré dans le fond marin (3), au moins une partie de la structure étant fixée à l'intérieur du pieu de fondation (2) avec une déviation des charges dans le fond marin (3) et coulée à l'intérieur du pieu de fondation (2) à l'aide d'une masse durcissable, caractérisé en ce que le pieu de fondation (2) est muni, avant l'insertion de la structure jusqu'à un niveau prédéterminé, d'un remplissage (4) porteur auto-nivelant, en ce que la structure est posée sur le remplissage (4) avec une déviation des charges dans le fond marin (3) et/ou dans le pieu de fondation (2) et en ce que la masse de scellement (8) est appliquée après la pose de la structure sur le remplissage (4).
  2. Procédé selon la revendication 1, caractérisé en ce que le remplissage appliqué dans le pieu de fondation (2) est un béton fluide auto-compactant.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la structure est préfixée avant le coulage à l'intérieur du pieu de fondation (2) sur la circonférence.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le niveau de remplissage (4) à l'intérieur du pieu de fondation (2) est choisi en fonction d'une longueur d'intégration prévue de la structure à l'intérieur du pieu de fondation (2).
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que le remplissage (4) intègre, à l'intérieur du pieu de fondation (2), des éléments de cisaillement sous la forme de chevilles, de nervures ou autres saillies.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que la structure est posée sur le remplissage en intercalant un matériau élastomère.
  7. Procédé selon l'une des revendications 3 à 6, caractérisé en ce que la structure et fixée et/ou centrée provisoirement, avant l'insertion de la masse de scellement, à l'intérieur du pieu de fondation (2) à l'aide de cales (10).
  8. Fondation d'un ouvrage offshore avec au moins une structure d'ancrage et au moins un pieu de fondation (2) inséré dans le fond marin (3), au moins une partie de la structure étant insérée, avec une déviation des charges dans le fond marin (3), dans le pieu de fondation (2) et coulée dans celui-ci, caractérisée en ce que la partie de la structure intégrée dans le pieu de fondation (2) est bloquée exclusivement à l'intérieur du pieu de fondation (2).
  9. Fondation selon la revendication 8, caractérisée en ce que la structure comprend au moins un montant d'appui (1) qui se trouve à l'intérieur du pieu de fondation (2) sur un socle de béton.
  10. Fondation selon l'une des revendications 8 ou 9, caractérisée en ce qu'elle est conçue comme une fondation Jacket comprenant plusieurs montants d'appui (1).
  11. Fondation selon l'une des revendications 8 à 10, caractérisée en ce que les montants d'appui (1) ne comprennent pas d'agrafes de maintien.
EP13172594.7A 2012-08-14 2013-06-19 Procédé de fondation d'un ouvrage offshore et fondation pour un ouvrage offshore Active EP2698476B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012016092.5A DE102012016092A1 (de) 2012-08-14 2012-08-14 Verfahren zur Gründung eines Offshore-Bauwerks sowie Fundament für ein Offshore-Bauwerk

Publications (2)

Publication Number Publication Date
EP2698476A1 EP2698476A1 (fr) 2014-02-19
EP2698476B1 true EP2698476B1 (fr) 2015-08-12

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EP13172594.7A Active EP2698476B1 (fr) 2012-08-14 2013-06-19 Procédé de fondation d'un ouvrage offshore et fondation pour un ouvrage offshore

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EP (1) EP2698476B1 (fr)
DE (1) DE102012016092A1 (fr)
DK (1) DK2698476T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014828A1 (de) * 2012-07-27 2014-01-30 Repower Systems Se Aufgelöste Tragwerksstruktur für eine Windenergieanlage sowie Verfahren zur Herstellung einer aufgelösten Tragwerksstruktur für eine Windenergieanlage
DE102014220782A1 (de) * 2014-10-14 2016-04-14 Rwe Innogy Gmbh Gründungssystem für die Gründung eines Offshore-Bauwerks, Verfahren zur Gründung eines Offshore-Bauwerks und Offshore-Bauwerk mit einem entsprechenden Gründungssystem
CN105369821B (zh) * 2015-12-10 2017-08-22 国网浙江省电力公司温州供电公司 一种输电线路钢管桩基础抗侧压装置
DE102017118375A1 (de) * 2017-08-11 2019-02-14 Innogy Se Offshore Bauwerk
DE102017123935A1 (de) * 2017-10-13 2019-04-18 Rosen Swiss Ag Dichtungsanordnung für eine Verbindung zweier Verbindungselemente eines Offshore-Bauwerks sowie Verfahren zur Herstellung derselben
DE102019103070A1 (de) * 2019-02-07 2020-08-13 Innogy Se Verfahren zur Bildung einer Verbindung zwischen zwei Rohrsegmenten unterschiedlicher Weite und entsprechend hergestellte Verbindung
WO2022037707A1 (fr) * 2021-03-08 2022-02-24 中国长江三峡集团有限公司 Fondations de monopieu utilisant un pieu vibrocompacté cimenté pour renforcer des fondations dans un sol meuble à utiliser dans la production d'énergie éolienne en mer, et procédé de construction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11323962A (ja) * 1998-05-13 1999-11-26 Kohan Kenzai Kk 建付け調整具及び同建付け調整具を用いた建付け方法
NO339381B1 (no) 2009-07-22 2016-12-05 Owec Tower As Fremgangsmåte og anordning for å kontrollere kraftoverføring mellom en struktur og dens fundament under installasjon
GB2476051B (en) * 2009-12-08 2016-07-27 Atkins Ltd A structure for supporting a wind turbine

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Publication number Publication date
DK2698476T3 (en) 2015-11-23
EP2698476A1 (fr) 2014-02-19
DE102012016092A1 (de) 2014-02-20

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