WO2019162102A1 - Fondation flottante pour une installation marin ainsi qu'installation marin pourvue d'une fondation flottante - Google Patents

Fondation flottante pour une installation marin ainsi qu'installation marin pourvue d'une fondation flottante Download PDF

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Publication number
WO2019162102A1
WO2019162102A1 PCT/EP2019/053055 EP2019053055W WO2019162102A1 WO 2019162102 A1 WO2019162102 A1 WO 2019162102A1 EP 2019053055 W EP2019053055 W EP 2019053055W WO 2019162102 A1 WO2019162102 A1 WO 2019162102A1
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WO
WIPO (PCT)
Prior art keywords
foundation
arms
floating
shore
central element
Prior art date
Application number
PCT/EP2019/053055
Other languages
German (de)
English (en)
Inventor
Thorsten Betz
Original Assignee
Max Bögl Wind 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 Max Bögl Wind AG filed Critical Max Bögl Wind AG
Publication of WO2019162102A1 publication Critical patent/WO2019162102A1/fr

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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
    • E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • B63B2035/4433—Floating structures carrying electric power plants
    • B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy

Definitions

  • the present invention relates to a floating foundation for a floating off-shore facility, in particular an off-shore wind turbine, with a cavity enclosing the foundation body, which consists at least partially of concrete. Furthermore, the invention relates to a wind turbine with such a foundation.
  • Floating foundations have become known in the art in various designs.
  • DE 102 06 585 A1 provides a gravity foundation which consists of a plurality of tubular reinforced concrete segments, which in turn are subdivided into watertight chambers.
  • the segments are identical to one another and contain both channels for tendons, by means of which the segments are clamped together to form the foundation, as well as channels for flooding the individual segments.
  • a foundation foot and a foundation head are provided on which the tendons are fixed.
  • the foundation is buoyant to spend after its manufacture to its place of installation. At the installation site, it is lowered by flooding the chambers and then the wind turbine is built on the lowered foundation.
  • floating foundations are also known, which also float in the water in the finished wind turbine or are in a state of suspension below the water surface.
  • Such floating foundations comprise buoyant bodies in order to be able to absorb the weight of the foundation and of the wind power plant based thereon.
  • Such a foundation is shown for example in EP 1 288 122 B1.
  • the foundation shown there is produced in cast-in-situ concrete in one piece.
  • From DE 10 2014 109 212 A1 also a floating foundation for a floating wind turbine is known, which is made of concrete.
  • the foundation is composed as a float body of several compressed concrete parts, which are guided in tension channels in the wall of the concrete parts. By pumping or draining water into the interior of the foundation, the immersion depth of the foundation can be adjusted both during transport and after installation of the wind turbine.
  • the foundations form floats or buoyant bodies, it is necessary to make them largely watertight.
  • the foundations are therefore either manufactured in one piece in in situ concrete or, if they are composed of several concrete parts, contact means are provided between the single precast concrete elements.
  • Object of the present invention is to simplify the Fier ein and the assembly of floating foundations of several concrete parts.
  • a floating foundation for a floating off-shore installation in particular an off-shore wind turbine, has a foundation body enclosing a float space, which at least partially consists of concrete.
  • the foundation body comprises a multiplicity of precast concrete parts, in particular concrete rings, which are clamped together to form the foundation body by means of tendons.
  • precast concrete parts in particular concrete rings, which are clamped together to form the foundation body by means of tendons.
  • ground joint is formed between two adjacent precast concrete parts.
  • Floating foundations usual through mortar or other glue.
  • the manufacture of the precast concrete parts is thereby simplified, since even special receptacles, such as, for example, grooves for receiving the composite can be dispensed with.
  • the manufacture of the foundation when assembling the precast concrete parts can be simplified because the step of introducing a composite into the joint can be omitted. Waiting times are avoided, which must be observed during setting or curing of the composite. Rather, the foundations can be handled immediately after the joining or clamping of the precast concrete parts to the foundation body, optionally transported or even installed immediately after the bracing at the installation.
  • the precast concrete parts are ground in the area of their joint-forming surfaces. Possible unevenness, which can lead to tension peaks in the prestressed precast concrete elements and can cause leaks, can be eliminated as a result.
  • the tolerances often lying in the range of several millimeters for such large precast concrete components can be compensated for hereby. It is particularly advantageous if at least the flatness tolerances of the ground concrete precast parts are less than 0.2 mm. Any remaining minor unevenness that could lead to leaks will be eliminated or at least reduced at the latest with the bracing of the precast concrete parts.
  • the precast concrete parts are produced as parts of the product with a flatness tolerance in the range of preferably less than 0.2 mm. Due to the simplification in handling the Components as well as the assembly to the foundation body can thereby be achieved an economic advantage despite the higher costs in the production of such Wegteteile.
  • the foundation body has a plurality of arms, in particular three, protruding from a central element.
  • each of the arms is composed of a part of the plurality of precast concrete parts, in particular concrete rings.
  • At least one of the arms preferably all arms have a rectangular cross-section.
  • at least one of the arms has a rectangular cross-section with rounded corners. Due to the rectangular cross-section, the floating position of the foundation body can be easily adjusted particularly well and stably. At the same time, the right-angled cross-section with rounded corners can achieve a stress-optimized shape and a reduced flow resistance, which counteracts stress peaks and significantly reduces the effects of maritime movements.
  • the precast concrete parts are designed as concrete rings, wherein preferably the concrete rings again have a rectangular cross-section with rounded corners. Alternatively, however, it is likewise conceivable that the concrete rings have an annular, a polygonal or another closed shape. If the prefabricated concrete elements are designed as concrete rings, then the production of the foundation body is again simplified, since only the concrete rings must be connected by means of tendons. Alternatively, however, it is also possible to assemble the concrete rings from a plurality of precast concrete components. For this purpose, the finished concrete parts include, for example, ring segments such as half or quarter shells or segments of a polygon. Likewise, the concrete rings can also be assembled from flat, prefabricated prefabricated concrete elements and curved precast concrete elements, for example half or quarter shells.
  • the tendons are guided in clamping channels within a wall of the concrete rings or the precast concrete elements.
  • the tendons are thereby protected at the same time from the action of the surrounding water surrounding the foundation.
  • the central element is formed from a metallic material, in particular an iron or steel material.
  • the central element which connects the several arms of the floating foundation together, can thereby be provided with a more complex shape.
  • the central element for other functions such as the inclusion of a tank in the interior of the central element or the anchoring of Spannspann- the arms.
  • the central element has a plurality of connection regions, in particular connection flanges, for the plurality of arms.
  • connection flanges On the connecting flanges, on the one hand, the arms can be connected and, on the other hand, the tendons of the arms can be anchored.
  • the arms are provided at their end remote from the central element with a closure element made of a metallic material, in particular an iron or steel material.
  • the terminating elements can thereby also be designed in a simple manner for further functions such as the design as a buoyancy body or trim tank or the reception of impact bodies or tanks.
  • the closure elements can serve for the anchoring of tendons. Due to the significantly better tensile strength of a metallic material compared to the material of the concrete rings, the closing elements and the central element are particularly suitable for anchoring the tendons.
  • the tensioning members are each also fixed with one of their ends, preferably with their tensionable end, to the connecting flanges of the central element and with their other end to one of the end elements.
  • this embodiment also offers the advantage that each arm can be assembled separately and connected to the central element or also released from it.
  • the tendons can be deflected in this case in the central element.
  • the central element and at least one of the arms enclose a common Flohlraum.
  • the entire foundation body can thereby be made compact and in a comparatively simple manner.
  • trim tanks as already described above, can be provided, for example, in the central element and / or in the end elements.
  • the arms and possibly Also enclose the central element each separate cavities and thereby even form individual tanks themselves.
  • At least one of the arms has a constant cross section between the central element and the end element, then the connection between the individual precast concrete parts is particularly easy and production is advantageous due to the many identical parts.
  • At least one of the arms is flooded via the joints and / or an opening which can optionally be closed or opened, it is possible to selectively level or stabilize the off-shore installation or the foundation. In particular, even if a discharge device is provided, a flooded foundation can be emptied again.
  • an off-shore system in particular a wind turbine, proposed with a tower and a floating foundation.
  • the foundation is formed according to the preceding and / or the following description, wherein said features may be present individually or in any combination.
  • the central element of the foundation has a connection to the tower with a reduced rigidity compared to a fixed clamping of the tower. This is advantageous because it can reduce the moment effect in the central element and the fatigue stress in the arms of the foundation. By bracing the tower on the foundation, the tower can still be firmly anchored.
  • the inclination of the tower with respect to the foundation can be corrected if necessary.
  • This correction can be done for example by adjusting the bracing of the tower by means of tension cables.
  • the tower is tensioned with tension cables on the foundation, in particular on the end elements of the arms of the foundation.
  • the tensioning cables are anchored in the region of a system axis of the arms. Flier notebook ensures that the bracing of the tower no additional moments are applied to the arms, since the clamping forces without lever arm directly on the system axis of the arms can attack.
  • the arms and possibly the terminating elements are exposed to less stress and can possibly be made simpler and less material-consuming.
  • the arms in particular the end elements of the arms, advantageously have in their interior a clamping block for the anchoring of the tensioning cables.
  • the arms In order to guide the tensioning cables up to the tensioning block in the interior of the arms, the arms, in particular the end elements of the arms, are provided on the upper side with a recess through which the tensioning cables can be passed.
  • the arms In order to check the anchoring of the tensioning cables and, if necessary, also to be able to tension the tensioning cable, it is furthermore advantageous if the arms, in particular the end elements of the arms, have an inspection opening. Further advantages of the invention will be described with reference to the embodiments illustrated below. Show it: 1 shows an off-shore system with a floating foundation in an overview,
  • FIG. 2 is a schematic sectional view of a precast concrete element according to a first embodiment
  • FIG. 3 shows a schematic sectional view of a precast concrete part according to a second embodiment
  • FIG. 4 shows a schematic sectional view of a precast concrete part according to a further embodiment
  • Figure 5 is a plan view of a central element of a floating
  • Figure 6 is a perspective view of a central element of a
  • FIG. 7 shows a schematic longitudinal section through an arm of a floating foundation
  • FIG. 8 shows a schematic representation of the anchoring of tensioning cables on an arm of a floating foundation
  • FIG. 9 shows a schematic sectional view of a closure element with a tensioning block.
  • FIG. 1 shows an off-shore system 1, in the present case a wind power plant, in a schematic overview.
  • the offshore installation 1 has a floating foundation 2, on which a tower 16 of the wind power plant or the offshore installation 1 is founded.
  • the tower 16 is presently designed as a steel tower and is provided at its upper end with a rotor 17.
  • the upper area of the tower 16 is tensioned with tensioning cables 19 on the foundation 2, in this case at the ends of the projecting arms 9 of the foundation 1.
  • the foundation 2 is provided in a manner known per se with superstructure bodies 18 which adjust the floating position or immersion depth of the foundation 2 and which are in each case arranged at the ends of the arms 9 of the foundation 2. It is understood that the presently shown foundation 2 is merely exemplary and may also have a variety of other basic shapes with or without arms 9.
  • the present foundation 2 has a foundation body 4, which in the present case is star-shaped or Y-shaped and encloses a float space 3 (see FIGS. 2-4 and 7) largely watertight.
  • the foundation body 4 contains a central element 8, on which several, in the present case three, arms 9 are arranged.
  • the arms 9 and the central element 8 thereby enclose a contiguous joint flea space 3, as can be seen in FIG.
  • the foundation body 4 is designed such that the arms 9 and the central element 8 lie in one plane.
  • the foundation body 4 and in the present case also each of the arms 9, is composed of a plurality of precast concrete elements 5, which by means of tendons 6 (see Figure 7), for example, tension strands or tension wires, connected to each other or clamped together.
  • the arms 9 furthermore have closing elements 10, which on the one hand each form a closure of the arms 9 and, on the other hand, receive the buoyancy bodies 18 already mentioned.
  • a joint 7 is formed in each case between two adjacent precast concrete elements 5.
  • the precast concrete parts 5 are, as will be explained in detail again with reference to FIG. 7, clamped without the arrangement of a composite material such as mortar or with one another.
  • the individual precast concrete elements 5, which in the present case are configured as concrete rings, are each ground with high accuracy at their end faces, so that after application of the prestressing forces by means of the tensioning members 6, the joints 7 can be performed tight and the penetration of water can be largely avoided.
  • the Flohlraum 3 serves as ballasttierbarer tank, the leakage of water through the joints 7 are also avoided.
  • one of the arms 9 is made longer than the other two, so that the foundation 2 obtains a Y-shaped structure, which has particularly favorable properties with regard to the automatic alignment of the wind turbine or off-shore Appendix 1 has.
  • the individual precast concrete parts 5 of the foundation body 4 are preferably designed as closed concrete rings, as shown in Figures 2 and 3.
  • the precast concrete elements 5 in this case have a rectangular cross-section, in which, however, preferably as shown in Figures 2 and 3, the corners are rounded.
  • the rectangular cross-section has a width B and a flea Fl and is thereby arranged so that the arms 9 lie with their broader side (width B) in the water, so that a good swimming stability is achieved. It is particularly advantageous for receiving the loads acting on the foundation 2 and the stability of the foundation 2 when the corners are rounded off with a large radius, so that, as shown for example in FIG. 3, on the two narrow sides (FIG. Flöhe Fl) of the rectangular cross section results in each case a circle segment.
  • FIG. 4 shows another embodiment of the precast concrete elements 5.
  • two flat, prefabricated prefabricated concrete elements 5 and two curved, in the present case circular segment-shaped precast concrete elements 5 are provided, which in turn are assembled into a concrete ring which encloses the flohl space 3 in its interior ,
  • the joints 7 between the individual precast concrete elements 5 can be clamped together again without arranging a composite, which can be done, for example, by screwing or else by a circumferential ring tensioning element (not shown here).
  • FIGS. 5 and 6 each show a plan view and a side view, respectively, of a central element 8 which connects the arms 9 of the foundation body 4 and of the foundation 2 with one another.
  • the central element 8 also serves to connect to the tower 16 of the offshore installation 1 (see FIG. 1), for which purpose the central element 8 has a tower receptacle 21.
  • the central element 8 in the present case consists of a metallic material, for example a steel material, and has a plurality of connection regions 13 for the arms 9.
  • An articulated connection for example “dashed lines” indicated “static” linkage, may be arranged on the tower receptacle 21 in order to allow alignment of the tower 16 with respect to the foundation 2.
  • Such "static" joints can be, for example, by sheets with a lower flexural rigidity around one of their Both main axes are realized. Two such joints are offset by 90 ° and arranged in different planes.
  • connection region 13 or the connection regions 13 are each designed as connecting flanges, in which the tendons 6 can be anchored.
  • FIG. 7 shows, in a schematic longitudinal section illustration of an arm 9, the connection of the individual precast concrete elements 5 by means of the tendons 6.
  • the end element 10, like the central element 8, is preferably made of a metallic material, in particular a steel material, and has, just like the latter, a connection region 13, in the present case also a connecting flange, for the arms 9.
  • the precast concrete elements 5 each have a plurality of tensioning channels 11 in which the tensioning elements 6 are guided in a protected manner.
  • the tendons are fixed to the connection region 13 of the end element 10 with their first end 14, which in the present case is designed as a fixed anchor.
  • the clamping members 6 are provided with a clamping anchor 15, by means of which they are clamped to the connecting region 13 of the central element 8. The assembly and the biasing of the tendons 6 and also the tensioning of the tendons 6 can thereby in favorably done, since the clamping anchor 15 are easily accessible in the central element 8.
  • a closable opening 22 is sketched. If necessary, water can be introduced into the arm 9 via this opening 22 in order to level or stabilize the foundation 2. In place of the opening 22, it may also be sufficient if the joints 7 are not made completely watertight and water can thereby penetrate into the arm 9 via the joints 7.
  • the opening 22 can also be arranged on one or more of the finished concrete parts 5 or the central element 8.
  • a discharge device not shown here, is provided, with which the foundation 2 can be kept stabilized in the desired position by appropriately pumping out the water which has penetrated or the position can be changed.
  • the individual arms 9 can also be separated from one another in a watertight manner, for example in the region of the central element 8 with one or more dividing walls, in order to be able to flood or empty the individual arms 9 independently of one another.
  • Figure 8 also shows a schematic representation of the anchoring of tensioning cables 19 on an arm 9 of a floating foundation 2, wherein here only one arm 9 of the foundation 2 is shown in a broken and schematic representation. Also, the tension cable 19 is symbolized only by a dashed line. If the tensioning cable 19 is anchored in the area of the system axis A of the arm 9 (the anchoring is symbolized here by the intersection of the system axis A and the tensioning cable 19), then no additional moments are caused by the anchoring applied to the arm.
  • the tensioning cable 19 is for this purpose passed through a recess 24 in the arm 9.
  • the recess 24 is dimensioned such that it comes to no contact with the tensioning cable 19.
  • an inspection opening 25 is still formed in the arm 9, through which the anchoring of the tensioning cable 19 is accessible.
  • a tensioning bracket 23 is arranged in the interior of the arm 9, for example in the interior of the closure element 10. This is shown in FIG.
  • the recess 24 and possibly also the inspection opening 25 can at the same time also serve as an opening 22 for targeted flooding of the arm 9 or of the foundation 2.

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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)
  • Wind Motors (AREA)

Abstract

L'invention concerne une fondation flottante (2) pour une installation marin flottante (1), notamment une éolienne marin, comporte un corps de fondation (4) entourant une cavité (3), qui est au moins partiellement en béton. Le corps de fondation (4) comporte une pluralité d'éléments préfabriqués en béton (5) qui sont serrés ensemble au moyen d'éléments de tension (6) pour former le corps de fondation (4), un joint (7) étamt formé entre deux éléments préfabriqués en béton (5) adjacents. Les éléments préfabriqués en béton (5) sont serrés entre eux sans utilisation d'un moyen de liaison dans le joint (7). Une installation marin (1), notamment une éolienne, comporte une telle fondation flottante.
PCT/EP2019/053055 2018-02-21 2019-02-07 Fondation flottante pour une installation marin ainsi qu'installation marin pourvue d'une fondation flottante WO2019162102A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018103894.1 2018-02-21
DE102018103894.1A DE102018103894A1 (de) 2018-02-21 2018-02-21 Schwimmendes Fundament für eine Off-Shore-Anlage sowie Off-Shore-Anlage mit einem schwimmenden Fundament

Publications (1)

Publication Number Publication Date
WO2019162102A1 true WO2019162102A1 (fr) 2019-08-29

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PCT/EP2019/053055 WO2019162102A1 (fr) 2018-02-21 2019-02-07 Fondation flottante pour une installation marin ainsi qu'installation marin pourvue d'une fondation flottante

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DE (1) DE102018103894A1 (fr)
WO (1) WO2019162102A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8474219B2 (en) * 2011-07-13 2013-07-02 Ultimate Strength Cable, LLC Stay cable for structures
CN112554636A (zh) * 2020-12-09 2021-03-26 中国电建集团贵阳勘测设计研究院有限公司 一种非岩石地质条件下的拉线型测风塔快速施工方法
EP4112439A1 (fr) * 2021-07-02 2023-01-04 Mareal Plateforme flottante pour une installation d'éolienne flottante

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206585A1 (de) 2002-02-15 2003-08-28 Hawesco Ind Gmbh Turmfundamente für Offshore-Windkraftanlagen
EP1288122B1 (fr) 2001-08-30 2010-05-12 Rund-Stahl-Bau Gesellschaft M.B.H. Support flottant pour une construction s'élevant au dessus de la surface de l'eau
DE102009002248A1 (de) * 2009-04-07 2010-10-14 Max Bögl Bauunternehmung GmbH & Co. KG Verfahren zum Errichten einer Off-Shore-Anlage und Off-Shore-Anlage
DE102013005299A1 (de) * 2013-03-27 2014-10-02 Ullrich Meyer Schwimmendes Ringwindrad
DE102014109212A1 (de) 2014-07-01 2016-01-07 Aerodyn Engineering Gmbh Schwimmende Windenergieanlage mit einem schwimmenden Fundament und Verfahren zur Installation einer solchen Windenergieanlage
DE102016118078A1 (de) * 2016-09-26 2017-12-28 Aerodyn Engineering Gmbh Schwimmendes Fundament für eine schwimmende Windenergieanlage und Windenergieanlage mit schwimmendem Fundament

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1288122B1 (fr) 2001-08-30 2010-05-12 Rund-Stahl-Bau Gesellschaft M.B.H. Support flottant pour une construction s'élevant au dessus de la surface de l'eau
DE10206585A1 (de) 2002-02-15 2003-08-28 Hawesco Ind Gmbh Turmfundamente für Offshore-Windkraftanlagen
DE102009002248A1 (de) * 2009-04-07 2010-10-14 Max Bögl Bauunternehmung GmbH & Co. KG Verfahren zum Errichten einer Off-Shore-Anlage und Off-Shore-Anlage
DE102013005299A1 (de) * 2013-03-27 2014-10-02 Ullrich Meyer Schwimmendes Ringwindrad
DE102014109212A1 (de) 2014-07-01 2016-01-07 Aerodyn Engineering Gmbh Schwimmende Windenergieanlage mit einem schwimmenden Fundament und Verfahren zur Installation einer solchen Windenergieanlage
DE102016118078A1 (de) * 2016-09-26 2017-12-28 Aerodyn Engineering Gmbh Schwimmendes Fundament für eine schwimmende Windenergieanlage und Windenergieanlage mit schwimmendem Fundament

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