EP2877638A1 - Fondation pour éolienne - Google Patents

Fondation pour éolienne

Info

Publication number
EP2877638A1
EP2877638A1 EP13731686.5A EP13731686A EP2877638A1 EP 2877638 A1 EP2877638 A1 EP 2877638A1 EP 13731686 A EP13731686 A EP 13731686A EP 2877638 A1 EP2877638 A1 EP 2877638A1
Authority
EP
European Patent Office
Prior art keywords
pile
primary
wind turbine
foundation
corner
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.)
Granted
Application number
EP13731686.5A
Other languages
German (de)
English (en)
Other versions
EP2877638B1 (fr
Inventor
Marc Seidel
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.)
Senvion GmbH
Original Assignee
Senvion GmbH
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 Senvion GmbH filed Critical Senvion GmbH
Publication of EP2877638A1 publication Critical patent/EP2877638A1/fr
Application granted granted Critical
Publication of EP2877638B1 publication Critical patent/EP2877638B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4114—Elements with sockets
    • 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
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/19—Three-dimensional framework structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/22—Sockets or holders for poles or posts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like

Definitions

  • the present invention relates to a dissolved structural structure, in particular a lattice tower structure, for a wind turbine according to the preamble of claim 1.
  • the invention relates to a foundation structure, which is designed as a dissolved structural structure, in particular as a lattice tower structure, and e.g. is anchored as an offshore foundation structure by means of rammed foundation piles, in particular by means of pre-drilled hollow piles, to the ground.
  • the present invention relates to a method for producing a dissolved structural structure, in particular a lattice tower structure, according to the preamble of claim 13.
  • lattice tower structures As resolved structural structures, for example, tripods, tripiles or lattice tower structures are called. In the following, the invention is explained using the example of such lattice tower structures, without this being to be understood as a restriction.
  • Straight lattice tower structures are well known in wind turbines, eg as lattice towers for wind turbines as an alternative to tubular steel towers.
  • lattice tower structures known as foundation structures over which the connection of a building with the ground.
  • Such known foundation structures consist for example of a lattice structure made of corner posts and truss-like arranged between the corner posts. environments. In other dissolved structural structures one does not speak of corner stems, but of legs.
  • mortar Grout
  • the corner stalk is extended at its free end with so-called jaket legs.
  • These jacket legs are mounted so that they stand in the vertical direction in the foundation piles, while the corner stems have a tilt to the vertical direction.
  • These jacket legs are, according to the diction of the present application, part of the corner stalk and thus encompassed by the term "corner stalk.” Connecting the corner stems to the brims can therefore also be the joining of the jacket legs to the stakes.
  • a tower construction in particular a wind turbine can be arranged, e.g. a wind turbine with a grid or a steel tube tower.
  • the aforementioned lattice tower structures consist of so-called primary and secondary structures.
  • the primary structures are those parts of the lattice tower structure that remove the loads from the wind turbine. These loads include static, eg resulting from the weight of the wind turbine, and also dynamic loads, for example, resulting from the rotor rotation and changing winds.
  • the primary structures include, for example, the corner stems and the struts connecting the corner stems and extending between the corner stems. These include nodes, eg cast and weld nodes.
  • the secondary structures do not have a load-bearing function that is relevant to stability, but are intended to fulfill functional tasks and to prevent them from occurring. loads (eg impact loads from service vessels to jetty) into the primary structure.
  • Secondary structures are, for example, cable guide tubes (J-tubes), platforms and feeders for landing boats, working platforms, or pile stoppers on the anchoring-side end areas of the corner stems, which reduce the penetration depth of a corner post when inserted into an inward-facing Limiting the seabed drilled or drilled hollow pile.
  • J-tubes cable guide tubes
  • platforms and feeders for landing boats, working platforms, or pile stoppers on the anchoring-side end areas of the corner stems which reduce the penetration depth of a corner post when inserted into an inward-facing Limiting the seabed drilled or drilled hollow pile.
  • the secondary structures are terminated by material, in which the material of the structures is metallurgically changed, as is known, for example, from US Pat. B. when welding is the case, connected to the primary structures.
  • the primary structures For example, Platforms are welded to the corner posts or braces.
  • the disadvantage of welded joints is that the metallurgical change of the structure produces a notch effect which reduces the fatigue strength of the structure.
  • the primary structure must be made larger in order to compensate for the reduction in fatigue strength, thereby increasing the cost of the lattice tower structure.
  • the object of the present invention is to provide an improved lattice tower structure or dissolved structural structure in this respect.
  • the lattice tower structure according to the invention or dissolved structural structure is characterized in that the cohesive connection between the primary and the secondary structure is designed as a bonding connecting layer arranged between primary and secondary structure.
  • welding is no longer required to make the connection between the primary and secondary structures, but the connection is made via a bonding layer.
  • the bonding layer has the advantage that no metallurgical changes in the material structure are generated and thus no notch effect occurs. Accordingly, the fatigue strength of the load-bearing primary structures in particular is not impaired. This has the consequence advantageously that the primary structures and also the secondary structures over the prior art at least partially lighter dimensions and costs can be saved accordingly.
  • connection layer may be an adhesive layer.
  • Adhesive connections are basically already known in steel construction. Suitable adhesive bonds and adhesives are described inter alia in the article "Bonding in steel” in the journal Stahlbau 75 (2006), Issue 10, pages 834 ff., Authors: Markus Feldmann et al.
  • An alternative bonding agent to adhesive may be (normal or high strength) grout according to another aspect of the invention.
  • mortar compounds also called Grout compounds
  • Grout compounds are basically known from the prior art, so that no further explanation is required.
  • the primary and secondary structures could be directly bonded to one another with a material fit, the adhesive or coarse layer would then be arranged directly between the two attachment partners.
  • An advantageous embodiment of the invention provides, however, that the secondary structure is attached to a sleeve, in particular by welding, and that the sleeve rests positively on the primary structure, wherein the connection layer is formed between the sleeve and the primary structure.
  • This embodiment according to the invention offers the advantage that the secondary structure does not have to be fastened directly to the primary structure, which is e.g. then a problem can be if only small connection areas are available.
  • the cuff may have a bonding surface of suitable size and contour, and the secondary structure may be e.g. welded to the cuff. But cuff and secondary structure can also be connected in other ways or be made in one piece.
  • a cuff has the advantage that it can be produced in a variety of sizes and shapes, and that the loads occurring through the secondary structure are removed via the cuff and via the bonding layer to the primary structure, without structurally weakening the primary structure.
  • the sleeve can be formed according to a further embodiment, at least two parts.
  • This embodiment offers the advantage that the collar can be arranged in a simple manner on the primary structure.
  • the cuff may be e.g. consist of two 180 ° shells, which, if necessary together with auxiliary shells, complement each other to form a closed ring.
  • the dishes may e.g. be joined by welding or screwing.
  • the invention can be implemented if the dissolved structural structure or the lattice tower structure is a foundation structure, the primary structure a corner stem or a leg, and the secondary structure a support for the depth limitation of the corner stem or leg when inserted into pre-excavated hollow piles is.
  • These supports are also referred to as pile stoppers.
  • the fastening according to the invention by means of a connecting layer with respect to the welding can be implemented more advantageously and without problems in terms of construction.
  • the pile stopper is welded to the Eckstiel well before the establishment of the foundation structure, namely on land in a workshop.
  • the embodiment of the invention has the advantage that the connection between the corner post and the pile stopper can be made after measuring the pre-piles either directly on site or just before loading on land, so that the arrangement of the pile stopper at the corner handle can be adapted to the actual pile height on site. This is possible because both an adhesive and a mortar compound in a relatively short time and in consistently good quality can be produced.
  • a requirement for offshore wind turbines is that they must have sufficient earthing. This led in the prior art that when using height compensation plates, especially those with elastic properties, no electrical contact between corner post and foundation pile was that would otherwise have been produced by the resting on the pile pile stopper, so that subsequently a electrical connection had to be made, eg by retrofitting a cable ters between pile stopper and foundation pile. This work had to be done by divers.
  • the subsequent arrangement of such an electrical conductor is no longer necessary in the embodiment according to the invention, since the pile stopper advantageously rests directly on the pile, whereby an electrical line is produced.
  • the embodiment according to the invention has the advantage that no notch effect occurs due to the connection type according to the invention. Accordingly, the pile stopper would not have to be removed, because a partial load transfer is unproblematic here. If there would be a failure of the compound of the invention after the establishment of the foundation, this would even be the case, since then there is a load transfer to 100% via the Grout connection.
  • the pile stopper is arranged from a bottom Auflagerringplatte with central through hole for the corner handle or leg, from a ring inside the Auflagerringplatte, surrounding the through hole, cylindrical extension piece and composed of a plurality of reinforcing fins, which are arranged along the circumference of standing substantially perpendicular to the Auflagerringplattenebene end piece extending radially outwards, in particular delta-shaped, between Auflagerringplatte and extension, wherein the Auflagerringplatte dimensioned the pole in inserted into a foundation pile Eckstiel or leg radially outstanding is.
  • This structure is characterized as material-saving and yet stable.
  • the pile stopper is formed at least two parts, since a split pile stopper is easier to mount on a corner post or leg and easier to handle.
  • a further advantageous embodiment of the invention provides that in the opening of the pile stopper spacers are arranged, via which the corner post or the leg is held in the opening at a distance from the pile stopper. This ensures that a sufficient annular gap for the introduction of the bonding layer is present.
  • a further advantageous embodiment of the invention provides that in particular the region of the connecting layer is provided with a corrosion protection, for example with a corrosion protection coating or a coating.
  • a secondary structure according to the invention can also be a cable guide tube or a jetty according to another embodiment of the invention.
  • the foundation structure according to the invention is not limited to lattice structures consisting of corner posts and trusses arranged like a truss between the corner posts, but also includes structures in which no distinction can be made between corner post and strut (eg "Hexabase-Jacket” or DE 20 2011 101 599 Ul, or other dissolved structural structures, eg tripods), where the term “leg” is no longer used for cornerstones but for legs.
  • the object is further achieved by a method having the features of claim 13.
  • Advantageous method embodiments are specified in the subclaims.
  • FIG. 1 is a schematic representation of a foundation structure according to the invention
  • FIG. 2 shows a detailed view of the region of a marked X in FIG. 1
  • FIG. 3 is an isometric view of the pile stopper shown in FIG. 2; FIG.
  • FIG. 4 shows a detailed view of the area marked Y in FIG. 1 of a further exemplary embodiment of a meshed pile stopper, FIG.
  • FIG. 5 is an isometric view of the pile stopper shown in FIG. 4, and FIG.
  • FIG. 6 is a detail view of the marked in Fig. 1 with Z area of a
  • FIG. 1 shows a foundation structure 1 for a tower construction 2.
  • this foundation structure 1 is a jacket for an offshore structure, such. B. for an offshore wind turbine, that is, that the jacket is anchored to the seabed 6, wherein the foundation structure 1 is formed and arranged so that its upper part is above the sea level 7.
  • the jacket consists of corner posts 3 and arranged between the corner posts 3 and attached thereto struts 4. These components are load-bearing parts, which are referred to as primary structures.
  • the Corner handles 3 are anchored via hollow foundation piles 5 in the seabed 6, wherein the immersion depth of the corner handles 3 in the foundation piles 5 is limited by pile stoppers 8, 9.
  • pile stoppers 8, 9 two different pile stoppers are shown in FIG. 1, namely a pile stopper 8 fastened by gluing on the left corner stalk, and a pile stopper 9 connected by grooving on the right corner stalk.
  • Fig. 2 shows the designated in Fig. 1 with X area in enlarged and sectioned view. Shown is a corner handle 3, which is verised in a pre-grounded in the seabed foundation pile 5 via a mortar connection 26 with the post 5. On the corner post 3, shear ribs 27 are provided on the outside in the area penetrating into the pile 5. Furthermore, an insertion aid 22 is formed at the lower end of the corner handle 3.
  • the pile stopper 8 On the upper end of the foundation pile 5, a pile stopper 8 is supported.
  • the pile stopper 8 has a supporting surface on the pile side 24 a, over which the Aufiagerplatte 24 rests on the pile 5. It also has reinforcing fins 24b, 24c which extend downwardly (24b) and upwards (24c) from the support plate 24, respectively.
  • the support plate 24 is connected via an adhesive connection with the corner handle 3. For better representability, only the left part of the support plate 24, the adhesive bond producing adhesive layer 28 is shown.
  • FIG. 3 shows in an isometric view the detail marked X in FIG. 1, which has already been described in more detail with reference to FIG.
  • Pile-stopper 8 consists of a circular annular plate 24, as shown in FIG. 2, a central passage opening for the corner handle 3 has.
  • This passage opening is dimensioned such that the corner post 3 with the pile stopper 8 forms an annular gap therebetween, into which an adhesive for forming an adhesive layer 28 is introduced. So that this annular gap formed as evenly as possible is, are provided on the annular gap-side surface of the pile stopper, ie on the corner handle 3 facing surface, spacers in the form of circumferential annular beads.
  • the adhesive can be chosen so that the compound still has a certain elasticity, so that the pile stopper 8 can still move elastically to a certain extent in the longitudinal direction of the Eckstieles 3.
  • the annular plate 24 of the Eckstieles 3 rests on its underside 24a on the foundation piles 5.
  • a cylindrical sleeve 29 is fixed stabilized substantially perpendicular to the annular plate 24 by means of stiffening fins 24c.
  • the pile stopper 8 is constructed from four 90 ° ring segments 8a to 8d. These ring segments 8a to 8d are screwed together at the pairwise abutting interfaces. For this purpose, holes 30 for the passage of bolts are provided in the adjacent reinforcing fins 24c.
  • FIGS. 4 and 5 show an alternative design of a pile stopper 9. In the sectional view of FIG.
  • annular gap 33 formed between the corner post 3 and the pile stopper is significantly larger than in the case of the adhesive variant.
  • This annular gap 33 is filled to attach the pile stopper 9 at the corner handle 3 with a grout 34, and after setting the Groutmasse 34 there is a firm connection between corner handle 3 and Pile-stopper 9.
  • This compound can be further improved in strength, that thrust ribs 35 are formed on the corner stalk-side inner surface of the pile stopper 9.
  • Functionally identical push ribs 27 also have the corner post 3 on its anchoring side end region. These push ribs 35 and 27 allow a more stable connection both with "the grout 34 filled in the annular gap 33 and with the groove 26 filled in the pile 5.
  • a ground wire 32 is again mounted to make an electrically conductive connection.
  • the pile stopper 9 of Fig. 5 consists of four 90 ° segments 40a to 40d, which are fastened together by bolts to form a 360 ° Pile stopper.
  • the attachment of the pile stopper 8 or 9 to the corner post 3 unlike in the prior art, only immediately before the attachment of the lattice tower structure 1 to the foundation piles 5 done.
  • the height up to which the foundation piles 5 protrude out of the seabed 6 can be measured and thereby the desired height position of the pile stoppers 8, 9 at the corner post 3 can be determined.
  • the pile stoppers 8, 9 secure by gluing (8) or by Vergroutung (9) at the corner post 3 and after setting of the connection can then the lattice tower structure 1 is lowered onto the foundation piles 5 and the lower end 22 of the corner posts 3 (Groutzapfen) are introduced into the foundation piles 5 until the Pile stoppers 8, 9 come to rest on the upper edges of the foundation piles 5.
  • Fig. 6 shows an enlarged view of the designated in Fig. 1 with Z area. Shown is the attachment of a cable guide tube 10 via a sleeve 11 at a corner handle 3. To the tubular corner handle 3 is an annular sleeve 11 is placed, with an annular gap remains between Eckstiel 3 and sleeve 11, which is filled with an adhesive 12. After setting of this bonding layer forming adhesive 11 is between cuff 1 1 and corner post 3 a solid compound that does not affect the stability of the corner post 3. On the sleeve 11, the cable guide tube 10 is welded.
  • the sleeve 1 1 z. B. be composed of several partial rings. Conceivable z. B. two 180 ° partial rings, three 120 ° partial rings or four 90 ° partial rings. Also combinations with different partial rings are possible. It is also possible that the sleeve 11 surrounds the tubular corner post 3 only in a partial circumference, z. B. by 90 °. The size of the adhesive surface must be only the Meet stability requirements for attachment of the secondary structure. These requirements are z. B. at a cable guide tube 10 is less than a work platform. For high stability requirements, a cuff 1 1 completely enclosing the corner handle 3 is therefore preferred.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Foundations (AREA)

Abstract

L'invention concerne une ossature porteuse ouverte pour une éolienne, notamment une structure de tour en treillis métallique pour une éolienne, notamment une structure de fondation pour une éolienne, notamment pour l'ancrage au sol d'une éolienne en mer par le biais de pieux de fondation fichés dans le sol. L'ossature porteuse ouverte présente des structures primaires, par le biais desquelles sont évacuées les charges produites dans l'ossature porteuse par l'éolienne, et des structures secondaires qui ne servent pas à l'évacuation des charges mais qui ont des rôles fonctionnels, et les structures secondaires sont montées sur les structures primaires et sont assemblées avec celles-ci par liaison de matière. L'objet de l'invention est caractérisé en ce que l'assemblage par liaison de matière entre les structures primaire et secondaire est réalisé sous la forme d'une couche de liaison disposée entre celles-ci. L'invention concerne en outre notamment un procédé de fabrication d'une structure de tour en treillis métallique pour une éolienne, notamment une structure de fondation pour une éolienne, notamment pour l'ancrage au sol d'une éolienne en mer par le biais de pieux de fondation fichés dans le sol.
EP13731686.5A 2012-07-27 2013-06-19 Fondation d'une éoliénne Active EP2877638B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012014828.3A DE102012014828A1 (de) 2012-07-27 2012-07-27 Aufgelöste Tragwerksstruktur für eine Windenergieanlage sowie Verfahren zur Herstellung einer aufgelösten Tragwerksstruktur für eine Windenergieanlage
PCT/EP2013/001811 WO2014015927A1 (fr) 2012-07-27 2013-06-19 Fondation pour éolienne

Publications (2)

Publication Number Publication Date
EP2877638A1 true EP2877638A1 (fr) 2015-06-03
EP2877638B1 EP2877638B1 (fr) 2016-09-28

Family

ID=48699718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13731686.5A Active EP2877638B1 (fr) 2012-07-27 2013-06-19 Fondation d'une éoliénne

Country Status (5)

Country Link
US (1) US9663939B2 (fr)
EP (1) EP2877638B1 (fr)
DE (1) DE102012014828A1 (fr)
DK (1) DK2877638T3 (fr)
WO (1) WO2014015927A1 (fr)

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US20150218796A1 (en) 2015-08-06
DE102012014828A1 (de) 2014-01-30
WO2014015927A1 (fr) 2014-01-30
EP2877638B1 (fr) 2016-09-28
US9663939B2 (en) 2017-05-30
DK2877638T3 (en) 2017-01-16

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