EP2702209B1 - Pieu de fondation - Google Patents

Pieu de fondation Download PDF

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Publication number
EP2702209B1
EP2702209B1 EP12715845.9A EP12715845A EP2702209B1 EP 2702209 B1 EP2702209 B1 EP 2702209B1 EP 12715845 A EP12715845 A EP 12715845A EP 2702209 B1 EP2702209 B1 EP 2702209B1
Authority
EP
European Patent Office
Prior art keywords
pile
foundation
foundation pile
water
external diameter
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
EP12715845.9A
Other languages
German (de)
English (en)
Other versions
EP2702209A2 (fr
Inventor
Marc Peters
Thorsten Reich
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.)
Herrenknecht AG
Original Assignee
Herrenknecht 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 Herrenknecht AG filed Critical Herrenknecht AG
Publication of EP2702209A2 publication Critical patent/EP2702209A2/fr
Application granted granted Critical
Publication of EP2702209B1 publication Critical patent/EP2702209B1/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
    • 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 invention relates to a foundation pile for producing a foundation for a structure in the water, preferably offshore, and a method for producing a foundation for a structure in the water, especially offshore.
  • the offshore wind turbine includes a gravity foundation as a foundation, which is located in the seabed. On the gravity foundation, the tower of the wind turbine is built, which extends from the gravity foundation in the water to the sea surface and then up to the maximum height of the tower to the nacelle.
  • the tower is conical. The largest diameter of the tower is present at its base in the water on the Gravity Fund.
  • foundation piles are introduced into the soil.
  • the opening into which the pile is lowered is created, in particular by the use of drilling technology ( DE 10 2009 023 466 A1 ). It is necessary that the bore has a larger diameter than the foundation pile. This difference is called an overcut. This is done to the Absinkwiderstand when introducing the foundation pile in the opening to reduce.
  • the overcut is filled during drilling with a suspension to support the borehole wall surrounding the bore with a suspension of, for example, bentonite. After the completion of the drilling operation and the introduction of the foundation pile in the bore, it is necessary to press the pile against the ground.
  • cement is introduced into the overcut, which stabilizes the pile from the ground after curing.
  • the overlying suspension is pushed out by pressing in the cement. In doing so, it shall be prevented that the suspension exits the overcut into the water to avoid turbidity or contamination of the water.
  • the object of the invention is to provide a foundation pile, with which it is possible to avoid that the overlying suspension does not escape into the water.
  • the foundation pile is to be optimized for the use of drilling technology within the pile.
  • this object is achieved in that a foundation pile is provided with a section located in the ground, in which the outer diameter of the in-ground portion of the foundation pile from below (bottom of the pile bottom) increases upward to the water bottom, and the outer diameter is designed as a function of the bending moment curve acting on the pile.
  • the advantage here is that additional sealing measures, such as the assumption of Auflägichtungen on the river bottom, are avoided.
  • the inner diameter is constant or conically tapering towards the bottom of the water. This is advantageous in terms of the drilling technique which is lowered into the foundation pile, since the prevailing projections of the inside diameter are avoided depending on the wall thickness resulting from the bending moment curve, which results in a simpler use of the drilling technique.
  • the outer diameter is greater than 3 m.
  • a single foundation can be provided, for example, for a tower of a wind turbine by a pile.
  • the diameter can be adjusted so that the pipe sections of the tower of the wind turbine can be placed directly on the pipe sections of the foundation pile.
  • the pile consists of pipe sections, preferably made of concrete or steel.
  • the maximum outer diameter depending on the bending moment curve of the foundation pile already 3 m to 8 m, preferably 5 m, below the water bottom is achieved.
  • the annular gap on the seabed is closed by the widening of the outer diameter and the adjacent soil is already compacted. This gives the pile an immediate stabilization and the vertical alignment is maintained even with the already existing horizontal load attack by currents.
  • the overcut is sealed in this way, so that nothing can escape into the open water during pressing and hardening with cement from the overcut.
  • a further teaching of the invention provides that a tube shot is arranged in the region of the water bottom, which closes an overcut formed during drilling of the opening / bore into which the pile is lowered, the tube shot preferably having a conically increasing outside diameter.
  • the object of the invention is achieved by a tower with a foundation of a previously described foundation pile, wherein the tower is made of pipe sections, which have an outer diameter depending on the bending moment pattern acting on the respective tube shot.
  • the object according to the invention is achieved by a method for producing a foundation for a structure in water, in particular offshore, in which a pile is lowered into the ground into an opening, wherein the opening in the ground is produced by means of drilling technology, when drilling an overcut is generated so that the opening is larger than the pile and the overcut is filled with a suspension, wherein the pile is introduced with an increasing outer diameter in the opening and the outer diameter increases towards the water bottom.
  • a pile is lowered into the ground into an opening, wherein the opening in the ground is produced by means of drilling technology, when drilling an overcut is generated so that the opening is larger than the pile and the overcut is filled with a suspension, wherein the pile is introduced with an increasing outer diameter in the opening and the outer diameter increases towards the water bottom.
  • Another teaching of the invention provides that the outer diameter increases until the diameter of the overcut is reached.
  • drilling takes place in full section or partial section, wherein this is preferably carried out unmanned.
  • Fig. 1 shows a schematic foundation pile 10, which is introduced in a waterbed 11.
  • the foundation pile 10 consists of a section 12 located in the ground, a section 14 located in the water 13, and an airborne section 15.
  • a bending moment curve 16 is shown, which consists of the loads from the flow 17 and the wind 18 the pile 10 results.
  • Fig. 2 shows a foundation pile 10 according to the prior art. This has a constant outer diameter 19 and a variable inner diameter 20.
  • the bore 21 has an overcut 22 which is arranged between outer wall 23 of the foundation pile 10 and borehole wall 24. In the region of the outlet region 25 in the region of the body of the water 26, as in Fig. 2 shown, the overcut 22 open to the waters 13.
  • the foundation pile 10 is constructed of pipe sections 27.
  • the outer diameter 19 of the pipe sections 27 is constant.
  • the wall thickness 28 is adapted to the bending moment curve 16. This results in a changing inner diameter 20.
  • Fig. 3 shows a first embodiment according to the invention of a foundation pile 10.
  • the foundation pile 10 is also constructed of pipe sections 27 having a constant inner diameter 20.
  • the wall thickness 28 is also adapted to the bending moment curve 16, but in such a way that the outer diameter 19 is carried out differently. The changes in the outer diameter 19 can be done in steps or continuously.
  • the foundation pile is inserted into the bore 21.
  • Between outer wall 23 and borehole wall 24 is also an overcut 22 which is filled with suspension.
  • the outer diameter 19 of the tube section 27 is designed so that the outer diameter 19 is greater than the overcut 22.
  • Fig. 4 shows a second embodiment according to the invention of a foundation pile 10. This differs from the first embodiment in that in the transition region 29 of the overcut 22 is wider, for example, by the soil condition of the water bottom 11, so that the overcut 22 there is greater than the expected after bending moment curve outside diameter 19 of the pipe section 27 located there. For this reason, the outer diameter of the pipe section is additionally increased in this area, so that a trespassing sealing section 31 is present. This sealing portion 31 causes the closure of the overcut 22 in the transition region.
  • the sealing portion 31 can be effected either by an increase in the wall thickness 28 of this tube section 27 or by providing an additional sealing component that is placed on the outer wall 23 of the tube section 27.

Landscapes

  • 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)
  • Wind Motors (AREA)
  • Piles And Underground Anchors (AREA)

Claims (10)

  1. Pieu de fondation pour la construction d'une fondation pour un ouvrage d'art dans l'eau, en particulier offshore, avec une partie (12) se trouvant dans le sol (11), dans lequel le diamètre extérieur (19) de la partie du pieu de fondation se trouvant dans le sol augmente depuis le bas, donc depuis le côté inférieur du pieu se trouvant dans le sol, vers le haut en direction du fond (26) de l'eau, et le diamètre extérieur (19) est conçu en fonction du profil (16) des moments de flexion agissant sur le pieu (10).
  2. Pieu de fondation selon la revendication 1, caractérisé en ce que le diamètre intérieur (20) est constant ou se termine en cône en direction du fond de l'eau (26).
  3. Pieu de fondation selon la revendication 1 ou 2, caractérisé en ce que le diamètre extérieur (19) est supérieur à 3 m.
  4. Pieu de fondation selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le pieu (10) se compose de tronçons (27), de préférence en béton ou en acier.
  5. Pieu de fondation selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le diamètre extérieur maximal (19) est atteint 3 m à 8 m, de préférence 4 m à 6 m en dessous du fond de l'eau (26), en fonction du profil (16) des moments de flexion.
  6. Pieu de fondation selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'un tronçon (27) est disposé dans la région du fond de l'eau (26), et ferme une découpe excédentaire (22) apparue lors de la réalisation de l'ouverture (21), dans laquelle le pieu (10) est descendu, dans lequel le tronçon (27) présente de préférence un diamètre extérieur (19) croissant en forme de cône.
  7. Tour pour une installation d'éolienne avec une fondation composée d'au moins un pieu de fondation, dans laquelle la tour est fabriquée à partir de tronçons (27), qui présentent un diamètre extérieur (19), qui est conçu en fonction du profil des moments de flexion agissant sur le tronçon respectif (27), caractérisée en ce que le pieu de fondation est un pieu de fondation selon l'une quelconque des revendications 1 à 6.
  8. Procédé de construction d'une fondation pour un ouvrage d'art dans l'eau, de préférence offshore, dans lequel on descend un pieu (10) dans une ouverture (21) dans le sol (11), dans lequel on réalise l'ouverture (21) dans le sol (11) par une technique de forage, on produit lors du forage une découpe excédentaire (22), de telle manière que l'ouverture (21) soit plus grande que le pieu (10), et on remplit la découpe excédentaire (22) avec une suspension, caractérisé en ce que l'on introduit le pieu (10) avec un diamètre extérieur croissant (19) dans l'ouverture (21), le diamètre extérieur (19) croissant en direction du fond de l'eau (26).
  9. Procédé selon la revendication 8, caractérisé en ce que le diamètre extérieur (19) croit jusqu'à ce que le diamètre de la découpe excédentaire (22) soit atteint.
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce que le forage est effectué à pleine section ou à section partielle, de préférence sans personnel.
EP12715845.9A 2011-04-26 2012-04-16 Pieu de fondation Not-in-force EP2702209B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202011005583U DE202011005583U1 (de) 2011-04-26 2011-04-26 Gründungspfahl zum Herstellen einer Gründung für ein Bauwerk im Wasser
PCT/EP2012/001636 WO2012146350A2 (fr) 2011-04-26 2012-04-16 Pieu porteur et procédé pour établir une fondation pour un bâtiment dans l'eau

Publications (2)

Publication Number Publication Date
EP2702209A2 EP2702209A2 (fr) 2014-03-05
EP2702209B1 true EP2702209B1 (fr) 2015-09-09

Family

ID=45998232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12715845.9A Not-in-force EP2702209B1 (fr) 2011-04-26 2012-04-16 Pieu de fondation

Country Status (3)

Country Link
EP (1) EP2702209B1 (fr)
DE (1) DE202011005583U1 (fr)
WO (1) WO2012146350A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4105386B1 (fr) * 2021-06-17 2024-02-21 Sharp Pulse Corp. Système de support ayant des fondations de pieux/ancrages façonnées et son procédé de formation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014832A1 (de) * 2012-07-27 2014-01-30 Rwe Power Aktiengesellschaft Gründungspfahl für Offshore-Bauwerke sowie Verfahren zur Hestellung eines Gründungspfahls für Offshore-Bauwerke
DK2930275T3 (en) * 2014-04-08 2018-04-03 Herrenknecht Ag System and method for making a foundation for a building in water
DE102019133132A1 (de) * 2019-12-05 2021-06-10 Rwe Renewables Gmbh Windkraftanlagengründungsstruktur sowie Verfahren zur Herstellung einer Windkraftanlagengründungsstruktur
EP4273326A1 (fr) 2022-05-06 2023-11-08 Optum Computational Engineering ApS Fondation d'une superstructure, en particulier d'une éolienne, éolienne dotée de la fondation, procédé de formation d'une fondation d'éolienne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008008760A1 (de) * 2008-02-12 2009-08-13 Schopf, Walter, Dipl.-Ing. Einrichtung zur Verminderung der Strömungsbelastung an Türmen von Offshore-Windenergieanlagen
DE102009020517B3 (de) * 2009-05-08 2010-10-21 Herrenknecht Ag Verfahren zum Errichten eines unterirdischen Bauwerks
DE102009023466B4 (de) * 2009-06-02 2012-09-13 Herrenknecht Ag Verfahren und Vorrichtung zum Erstellen eines Unterwasserfundaments eines Bauwerks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4105386B1 (fr) * 2021-06-17 2024-02-21 Sharp Pulse Corp. Système de support ayant des fondations de pieux/ancrages façonnées et son procédé de formation

Also Published As

Publication number Publication date
WO2012146350A3 (fr) 2012-12-20
DE202011005583U1 (de) 2013-09-30
WO2012146350A2 (fr) 2012-11-01
EP2702209A2 (fr) 2014-03-05

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