NO20110369A1 - Offshore foundation for installation on the seabed as well as methods for installation of the offshore foundation - Google Patents

Offshore foundation for installation on the seabed as well as methods for installation of the offshore foundation Download PDF

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Publication number
NO20110369A1
NO20110369A1 NO20110369A NO20110369A NO20110369A1 NO 20110369 A1 NO20110369 A1 NO 20110369A1 NO 20110369 A NO20110369 A NO 20110369A NO 20110369 A NO20110369 A NO 20110369A NO 20110369 A1 NO20110369 A1 NO 20110369A1
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cells
bucket
foundation
installation
seabed
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NO20110369A
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Norwegian (no)
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NO332557B1 (en
Inventor
Trond Landbo
Niklas Normann
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Vici Ventus Technology As
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Priority to NO20110369A priority Critical patent/NO332557B1/en
Priority to PCT/NO2012/050012 priority patent/WO2012121607A1/en
Publication of NO20110369A1 publication Critical patent/NO20110369A1/en
Publication of NO332557B1 publication Critical patent/NO332557B1/en

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F03D13/22—Foundations specially adapted for wind motors
    • 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
    • E02B2017/0065—Monopile structures
    • 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
    • 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
    • E02B2017/0091—Offshore structures for wind turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/95—Mounting on supporting structures or systems offshore
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • Sustainable Energy (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Foundations (AREA)
  • Wind Motors (AREA)

Description

Foreliggende oppfinnelse angår et offshorefundament og en fremgangsmåte for installasjon av fundamentet på havbunnen med påmontert dekksutstyr, fortrinnsvis for vindturbiner eller olje og gass, i det fundamentet omfatter minst tre celler og minst et tårn anordnet fortrinnsvis sentrisk mellom cellene. The present invention relates to an offshore foundation and a method for installing the foundation on the seabed with attached deck equipment, preferably for wind turbines or oil and gas, in which the foundation comprises at least three cells and at least one tower arranged preferably centrically between the cells.

Nærmere bestemt består fundamentet av minst ett tårn (sylinder/kon) med en bredere fundamentkonstruksjon i bunnen. En målsetting med slike fundamenter er å kunne sammenstille et fundament og dekksutstyr (toppside) nær land å kunne slepe komplette enheter ut til offshorelokasjonen og installere ved ballastering. Fundamentet er fortrinnsvis av typen monotårn gravitasjonsfundament eller et skjørtepelet fundament, et "volumfundament" fortrinnsvis bygget av betong eller stål som er selvflytende i alle temporære flytefaser. Slike fundamenter har ofte en nedre grense for vanndyp som man kan oppnå stabilitet i flytefaser uten at man bruker hjelpemidler. Dette er spesielt en utfordring hvis man ønsker full sammenstilling av fundament og topside/vindturbin nær land. En kjent løsning for å oppnå flytestabilitet for monotårnfundamenter er å benytte seg av temporær oppdrift i form av separate oppdriftstanker som monteres på konstruksjonen før installasjon og som demonteres etter at fundamentet er kommet på plass. Det siste for at man skal unngå at disse tankene drar på seg store bølgelaster. Slike temporære flytelegemer vil medføre kostbare marine operasjoner både før og etter installasjon. More specifically, the foundation consists of at least one tower (cylinder/cone) with a wider foundation structure at the bottom. A goal with such foundations is to be able to put together a foundation and deck equipment (topside) close to land, to be able to tow complete units out to the offshore location and install by ballasting. The foundation is preferably of the monotower gravity foundation type or a skirt pile foundation, a "volume foundation" preferably built of concrete or steel which is self-floating in all temporary floating phases. Such foundations often have a lower limit for water depth at which stability can be achieved in floating phases without the use of aids. This is particularly a challenge if you want a full assembly of foundation and topside/wind turbine close to land. A known solution to achieve float stability for monotower foundations is to use temporary buoyancy in the form of separate buoyancy tanks which are mounted on the structure before installation and which are dismantled after the foundation is in place. The latter to avoid these tanks taking on large wave loads. Such temporary floating bodies will entail costly marine operations both before and after installation.

En annen kjent løsning er å montere permantente oppdriftstanker som blir stående etter installasjon, men som da har den ulempe at de pådrar seg store ekstra bølgelaster som konstruksjonen må kunne motstå gjennom sin levetid. Another known solution is to install permanent buoyancy tanks which remain after installation, but which then have the disadvantage that they incur large additional wave loads which the structure must be able to withstand throughout its lifetime.

Et mål med den foreliggende oppfinnelse er å tilveiebringe en konstruksjon som har full stabilitet i alle flytefaser, inklusiv installasjon på feltet, på vanndyp som normalt er for grunne til å oppnå slik stabilitet for denne typen fundamenter. An aim of the present invention is to provide a construction which has full stability in all floating phases, including installation in the field, at water depths which are normally too shallow to achieve such stability for this type of foundation.

Et annet mål er at den ovenfor omtalte stabilitet skal oppnås på en måte som ikke krever kostbare marine operasjoner før og etter installasjon og som heller ikke pådrar seg store bølgelaster under operasjon. Another goal is that the above-mentioned stability should be achieved in a way that does not require expensive marine operations before and after installation and that also does not incur large wave loads during operation.

Et ytterligere mål er at konstruksjonen eller offshorefundamentet skal kunne fjernes fra havbunnen på en enkel og kostnadseffektiv måte. A further goal is that the construction or offshore foundation should be able to be removed from the seabed in a simple and cost-effective way.

Målene med foreliggende oppfinnelse oppnås ved et offshorefundament for installasjon på havbunnen med påmontert dekksutstyr, fortrinnsvis for vindturbiner eller olje og gass, i det fundamentet omfatter minst tre celler og minst ett tårn anordnet fortrinnsvis sentrisk mellom cellene, kjennetegnet ved at de minst tre celler er anordnet med innvendige glidbare bøtteceller som i en uttrukket tilstand ved installasjon av fundamentet på havbunnen stikker opp gjennom vannlinjen og i en nedsenket tilstand er anordnet innen de minst tre celler. The objectives of the present invention are achieved by an offshore foundation for installation on the seabed with attached deck equipment, preferably for wind turbines or oil and gas, in which the foundation comprises at least three cells and at least one tower arranged preferably centrically between the cells, characterized by the fact that the at least three cells are arranged with internal sliding bucket cells which in an extended state when installing the foundation on the seabed protrude through the waterline and in a submerged state are arranged within the at least three cells.

Foretrukne utførelsesformer av offshorefundamentet er videre utdypet i kravene to til og med seks. Preferred embodiments of the offshore foundation are further elaborated in requirements two to six.

Videre oppnås målene med foreliggende oppfinnelser ved at fremgangsmåte for installasjon av et offshorefundament med påmontert dekksutstyr, fortrinnsvis for vindturbiner eller olje- og gass, idet fundamentet omfatter minst tre celler og minst et tårn anordnet fortrinnsvis sentrisk mellom cellene, Furthermore, the objectives of the present inventions are achieved by the method for installing an offshore foundation with attached deck equipment, preferably for wind turbines or oil and gas, the foundation comprising at least three cells and at least one tower arranged preferably centrically between the cells,

kjennetegnet ved at de minst tre celler anordnes med innvendige glidbare bøtteceller, bøttecellenes øvre område posisjoneres over vannoverflaten under installasjon og nedsenking av fundamentet til havbunnen i det luft er fanget i bøttecellenes hulrom dannet mellom bøttecellenes innvendige vegg- og toppoverflate og vannoverflaten og etter installasjon av fundamentet på havbunnen slippes luften i hulrommet ut og bøttecellene senkes ned i cellene. characterized by the fact that the at least three cells are arranged with internal sliding bucket cells, the upper area of the bucket cells is positioned above the water surface during installation and submersion of the foundation to the seabed in that air is trapped in the cavity of the bucket cells formed between the inner wall and top surface of the bucket cells and the water surface and after installation of the foundation on the seabed, the air in the cavity is released and the bucket cells are lowered into the cells.

En foretrukket utførelsesform av oppfinnelsen skal i det følgende forklares med henvisning til figurene, hvor A preferred embodiment of the invention will be explained in the following with reference to the figures, where

figur 1 viser et offshorefundament med påmontert dekksutstyr ifølge oppfinnelsen, figure 1 shows an offshore foundation with attached deck equipment according to the invention,

figur 2 viser et planriss gjennom snittet 2-2 i figur 1, figure 2 shows a plan through section 2-2 in figure 1,

figur 3 viser en detalj av en bøttecelle til offshorefundamentet i figur 1 og figur 2, og figure 3 shows a detail of a bucket cell for the offshore foundation in figure 1 and figure 2, and

figur 4a-h viser offshorefundamentet i en trinnvis fase fra bygging til det er installert på havbunnen. figure 4a-h shows the offshore foundation in a step-by-step phase from construction until it is installed on the seabed.

Med henvisning spesielt til figur 1, 2 og 3 er et offshorefundament 1 vist. Fundamentet 1 består av minst tre celler 3 og minst et tårn 13 anordnet fortrinnsvis sentrisk mellom cellene 3. Dekksutstyr 20 i form av en vindturbin er anordnet på tårnet 13. Cellene 3 er anordnet med innvendige glidbare bøtteceller 6 som i en uttrukket tilstand ved installasjon av fundamentet 1 på havbunnen 25 stikker opp gjennom vannlinjen 26 hvor de i en nedsenket tilstand er anordnet innen de minst tre celler 3. With particular reference to figures 1, 2 and 3, an offshore foundation 1 is shown. The foundation 1 consists of at least three cells 3 and at least one tower 13 arranged preferably centrically between the cells 3. Deck equipment 20 in the form of a wind turbine is arranged on the tower 13. The cells 3 are arranged with internal sliding bucket cells 6 which in an extended state upon installation of the foundation 1 on the seabed 25 protrudes through the water line 26 where in a submerged state they are arranged within the at least three cells 3.

Spesielt med henvisning til figur 3 er de glidbare bøtteceller 6 vist som sylindre med en øvre topplate 7 og en nedre utvendig periferisk flenskonstruksjon 8 . Cellene 3 er anordnet med en innvendig øvre ringbjelke 4 hvilket medfører at når de glidbare bøtteceller 6 er i en uttrukket tilstand vil de støte og stoppe mot denne innvendige øvre ringbjelke 4. In particular with reference to Figure 3, the sliding bucket cells 6 are shown as cylinders with an upper top plate 7 and a lower outer circumferential flange construction 8. The cells 3 are arranged with an internal upper ring beam 4, which means that when the sliding bucket cells 6 are in an extended state, they will bump and stop against this internal upper ring beam 4.

Bøttecellene 6 kan være anordnet med en ventil 11 for utslipp eller innføring av luft henholdsvis ut av eller inn i bøttecellenes hulrom dannet mellom bøttecellenes innvendige vegg- og toppoverflate 9,10 og vannoverflaten 16. The bucket cells 6 can be arranged with a valve 11 for the release or introduction of air respectively out of or into the bucket cell's cavity formed between the bucket cell's inner wall and top surface 9,10 and the water surface 16.

Bøttecellene 6 kan være laget av stål eller betong eller en kombinasjon av disse materialer samt andre egnede materialer. The bucket cells 6 can be made of steel or concrete or a combination of these materials as well as other suitable materials.

Bøttecellene 6 kan også være anordnet med minst ett teleskopledd i form av minst en sylinderkappe på utsiden av den innvendige bøttecelle 6. Figur 4a-4h viser en trinnvis oppbygging av offshorefundamentet 1 til det er ballastert og installert på havbunnen 25. Figur 4a viser cellene 3 med de innvendige anordnede glidbare bøtteceller 6 i en flytende tilstand. Figur 4b viser det komplette offshorefundamentet 1 med det påmonterte tårnet 13. Figur 4c viser ballastering og nedsenkning av offshorefundamentet 1 idet de glidbare bøtteceller 6 er i en delvis utstrukket tilstand. Figur 4d viser videre ballastering inntil de glidbare bøtteceller er i en uttrukket tilstand hvor den nedre utvendige periferiske flenskonstruksjonen 8 støter mot den innvendige øvre ringbjelke 4. Den utvendige vannlinje 26 og den innvendige vannoverflate 16 er her vist. Hulrommet som innesluttes av vannoverflaten 16 og bøttecellenes innvendige vegg- og toppoverflate 9,10 er fylt med luft, og cellene 3 er fylt med vann.. Figur 4e viser fylling av fast ballast for transport av fundamentet 1 til installasjonsstedet. Figur 4f viser ballastering av offshorefundamentet 1 ved påmontering av dekksutstyr 20. Figur 4g viser deballastering av offshorefundamentet 1 med påmontert dekksutstyr 20 ved transport til installasjonsstedet. Figur 4h viser offshorefundamentet 1 installert på havbunnen 25. Etter installasjonen åpnes ventilen 11 og luften i bøttecellene 6 slippes ut slik at disse synker ned i cellene 3. Ekstra ballast 27 er også vist innført i offshorefundamentets nedre tårnområde. The bucket cells 6 can also be arranged with at least one telescopic joint in the form of at least one cylinder casing on the outside of the inner bucket cell 6. Figures 4a-4h show a step-by-step construction of the offshore foundation 1 until it is ballasted and installed on the seabed 25. Figure 4a shows the cells 3 with the internally arranged sliding bucket cells 6 in a liquid state. Figure 4b shows the complete offshore foundation 1 with the mounted tower 13. Figure 4c shows the ballasting and submersion of the offshore foundation 1, with the sliding bucket cells 6 in a partially extended state. Figure 4d further shows ballasting until the sliding bucket cells are in an extended state where the lower outer circumferential flange construction 8 abuts the inner upper ring beam 4. The outer water line 26 and the inner water surface 16 are shown here. The cavity enclosed by the water surface 16 and the inner wall and top surface 9,10 of the bucket cells is filled with air, and the cells 3 are filled with water. Figure 4e shows the filling of solid ballast for transporting the foundation 1 to the installation site. Figure 4f shows ballasting of the offshore foundation 1 when deck equipment 20 is attached. Figure 4g shows deballasting of the offshore foundation 1 with deck equipment 20 attached during transport to the installation site. Figure 4h shows the offshore foundation 1 installed on the seabed 25. After installation, the valve 11 is opened and the air in the bucket cells 6 is released so that these sink into the cells 3. Extra ballast 27 is also shown introduced in the lower tower area of the offshore foundation.

Offshorefundamentet 1 oppnår full stabilitet i alle flyttefaser, inklusiv installasjon på feltet. Dette oppnås ved anvendelse av de glidbare bøtteceller 6 (fortrinnsvis i stål, men betong og andre materialer kan brukes), som går igjennom vannlinjen og som øker vannplan- treghetsmomentet markant. Konstruksjonen i følge oppfinnelsen fører til at man oppnår full effekt av bøttecellene under installasjon og at disse forsvinner ned i fundamentkonstruksjonen etter installasjon for å unngå økte bølgelaster. Det kreves ikke at man aktivt styrer oppdriften i bøttecellene 6. Det er den fangede luften som hever de glidbare bøtteceller 6 eller sylinderne over vannlinjen til enhver tid og løfter de til den nedre utvendige periferiske flenskonstruksjonen 8 stopper mot den innvendige øvre ringbjelke 4 i cellene 3. De glidbare bøttecellene 6 vil da fungere som faste oppdriftslegemer inntil fundamentet 1 er plassert på havbunnen 26. Etter at installasjonen er utført åpnes ventilen 11 og luften i bøttecellene 6 slippes ut slik at disse synker ned i cellene 3. The offshore foundation 1 achieves full stability in all moving phases, including installation on the field. This is achieved by using the sliding bucket cells 6 (preferably in steel, but concrete and other materials can be used), which pass through the water line and which increase the water plane moment of inertia significantly. The construction according to the invention leads to achieving the full effect of the bucket cells during installation and that these disappear into the foundation structure after installation to avoid increased wave loads. It is not required to actively control the buoyancy in the bucket cells 6. It is the trapped air that raises the sliding bucket cells 6 or cylinders above the waterline at all times and lifts them until the lower outer circumferential flange structure 8 stops against the inner upper ring beam 4 of the cells 3 The sliding bucket cells 6 will then function as fixed buoyancy bodies until the foundation 1 is placed on the seabed 26. After the installation is completed, the valve 11 is opened and the air in the bucket cells 6 is released so that they sink into the cells 3.

Eventuell fjerning av offshorefundamentet 1 vil skje i motsatt rekkefølge, man vil pumpe luft inn i de glidbare bøttecellene 6 til de stiger opp over vannlinjen 26 og stopper mot ringbjelken 4. Deretter vil man kunne heve fundamentet 1 ved å pumpe vann ut av det sentrale kammer og tårnet 13. Deretter kan offshorefundamentet 1 slepes i land og demonteres i sine respektive deler. Any removal of the offshore foundation 1 will take place in the opposite order, air will be pumped into the sliding bucket cells 6 until they rise above the waterline 26 and stop against the ring beam 4. It will then be possible to raise the foundation 1 by pumping water out of the central chamber and the tower 13. The offshore foundation 1 can then be towed ashore and dismantled into its respective parts.

I den viste utførelse av offshorefundamentet 1 er cellene 3 eller kassen ca halvparten av vanndypet og bøttene 6 med tilsvarende høyde slik at de så vidt stikker opp under installasjonen. Ved dypere vann kan disse bøttecellene får ytterligere en stålsylinderkappe på utsiden, ekstra teleskopledd, som tillater at kassehøyden reduseres til ca en tredjedel av vanndypet og bøttecellen 6 og den ekstra sylinderkappen har tilsvarende høyde slik at bøttecellen stikker opp gjennom vannlinjen 26. In the shown version of the offshore foundation 1, the cells 3 or box are approximately half the water depth and the buckets 6 are of a corresponding height so that they barely stick out during installation. In deeper water, these bucket cells can be given an additional steel cylinder cover on the outside, extra telescopic joints, which allow the box height to be reduced to about a third of the water depth and the bucket cell 6 and the additional cylinder cover have a corresponding height so that the bucket cell protrudes through the water line 26.

Claims (7)

1. Offshorefundament (1) for installasjon på havbunnen (25) med påmontert dekksutstyr (20), fortrinnsvis for vindturbiner eller olje og gass, i det fundamentet (1) omfatter minst tre celler (3) og minst ett tårn (13) anordnet fortrinnsvis sentrisk mellom cellene (3), karakterisert vedat de minst tre celler (3) er anordnet med innvendige glidbare bøtteceller (6) som i en uttrukket tilstand ved installasjon av fundamentet (1) på havbunnen (25) stikker opp gjennom vannlinjen (26) og i en nedsenket tilstand er anordnet innen de minst tre celler (3).1. Offshore foundation (1) for installation on the seabed (25) with attached deck equipment (20), preferably for wind turbines or oil and gas, in which foundation (1) comprises at least three cells (3) and at least one tower (13) arranged preferably centrically between the cells (3), characterized in that the at least three cells (3) are arranged with internal sliding bucket cells (6) which in an extended state during installation of the foundation (1) on the seabed (25) protrude through the waterline (26) and in a submerged state are arranged within the least three cells (3). 2. Offshorefundament (1) ifølge krav 1, karakterisert vedat de glidbare bøtteceller (6) er sylindre med en øvre topplate (7) og en nedre utvendig periferisk flenskonstruksjon (8), og de minst tre celler (3) er anordnet med en innvendig øvre ringbjelke (4) hvorved den nedre utvendige periferiske flenskonstruksjon støter mot den innvendige øvre ringbjelke når de glidbare bøtteceller (6) er i en uttrukket tilstand.2. Offshore foundation (1) according to claim 1, characterized in that the sliding bucket cells (6) are cylindrical with an upper top plate (7) and a lower outer circumferential flange structure (8), and the at least three cells (3) are arranged with an inner upper ring beam (4) whereby the lower outer circumferential flange construction abuts the inner upper ring beam when the sliding bucket cells (6) are in an extended condition. 3. Offshorefundament (1) ifølge krav 1 eller 2, karakterisert vedat bøttecellene (6) er anordnet med en ventil (11) for utslipp eller innføring av luft henholdsvis ut av eller inn i bøttecellenes hulrom dannet mellom bøttecellenes innvendige vegg- og toppoverflate (9,10) og vannoverflaten (16).3. Offshore foundation (1) according to claim 1 or 2, characterized in that the bucket cells (6) are arranged with a valve (11) for the discharge or introduction of air respectively out of or into the bucket cell's cavity formed between the bucket cell's inner wall and top surface (9,10) and the water surface (16). 4. Offshorefundament (1) ifølge et hvert av de foregående krav,karakterisert vedat bøttecellene (6) er av stål.4. Offshore foundation (1) according to each of the preceding claims, characterized in that the bucket cells (6) are made of steel. 5. Offshorefundament (1) ifølge et hvert av kravene 1-3, karakterisert vedat bøttecellene (6) er av betong.5. Offshore foundation (1) according to each of claims 1-3, characterized in that the bucket cells (6) are made of concrete. 6. Offshorefundament (1) ifølge et hvert av de foregående krav,karakterisert vedat bøttecellene (6) er anordnet med minst et teleskopledd i form av minst en sylinderkappe på utsiden av den innvendige bøttecelle (6).6. Offshore foundation (1) according to each of the preceding claims, characterized in that the bucket cells (6) are arranged with at least one telescopic joint in the form of at least one cylinder shell on the outside of the internal bucket cell (6). 7. Fremgangsmåte for installasjon av et offshorefundament (1) med påmontert dekksutstyr (20), fortrinnsvis for vindturbiner eller olje- og gass, idet fundamentet (1) omfatter minst tre celler (3) og minst et tårn (13) anordnet sentrisk mellom cellene (3), karakterisert vedat de minst tre celler (3) anordnes med innvendige glidbare bøtteceller (6), bøttecellenes øvre område posisjoneres over vannlinjen (26) under installasjon og nedsenking av fundamentet (1) til havbunnen (25) i det luft er fanget i bøttecellenes hulrom dannet mellom bøttecellenes innvendige vegg-og toppoverflate (9, 10) og vannoverflaten (16) og etter installasjon av fundamentet (1) på havbunnen (25) slippes luften i hulrommet ut og bøttecellene (6) senkes ned i cellene (3).7. Procedure for installing an offshore foundation (1) with mounted deck equipment (20), preferably for wind turbines or oil and gas, the foundation (1) comprising at least three cells (3) and at least one tower (13) arranged centrally between the cells (3), characterized in that the at least three cells (3) are arranged with internal sliding bucket cells (6), the upper area of the bucket cells is positioned above the water line (26) during installation and immersion of the foundation (1) to the seabed (25) in which air is trapped in the cavity of the bucket cells formed between the inner wall and top surface of the bucket cells (9, 10) and the water surface (16) and after installation of the foundation (1) on the seabed (25), the air in the cavity is released and the bucket cells (6) are lowered into the cells (3).
NO20110369A 2011-03-10 2011-03-10 Offshore foundation for installation on the seabed as well as methods for installation of the offshore foundation NO332557B1 (en)

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PCT/NO2012/050012 WO2012121607A1 (en) 2011-03-10 2012-02-02 Offshore foundation for installation on the seabed and method for installation of the offshore foundation

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AU2014230932B2 (en) * 2013-03-14 2018-05-10 Arranged Bvba Pressure vessel based tower structure
US11173987B2 (en) 2016-10-18 2021-11-16 Atkins Energy, Inc. Offshore floating structures
CN106988967A (en) * 2017-04-19 2017-07-28 浙江大学 A kind of multi-cavity pulsed levelling device and method for offshore wind turbine barrel base
CN109306706B (en) * 2018-11-01 2021-07-16 合肥学院 Main and auxiliary barrel seabed injection device and construction method thereof

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FR2827015B1 (en) * 2001-07-06 2005-12-23 Bouygues Offshore OFFSHORE WIND TURBINE AND METHOD OF CONSTRUCTION
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