EP3663186A1 - Landestruktur für eine offshore-struktur - Google Patents

Landestruktur für eine offshore-struktur Download PDF

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Publication number
EP3663186A1
EP3663186A1 EP18211061.9A EP18211061A EP3663186A1 EP 3663186 A1 EP3663186 A1 EP 3663186A1 EP 18211061 A EP18211061 A EP 18211061A EP 3663186 A1 EP3663186 A1 EP 3663186A1
Authority
EP
European Patent Office
Prior art keywords
landing
offshore structure
offshore
structure according
landing structure
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.)
Withdrawn
Application number
EP18211061.9A
Other languages
English (en)
French (fr)
Inventor
Martin MUNCK
Christian Ulrich BARFOED
Jesper Kvistgaard CHRISTIANSEN
Jan Pedersen
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.)
Orsted Wind Power AS
Original Assignee
Orsted Wind Power AS
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 Orsted Wind Power AS filed Critical Orsted Wind Power AS
Priority to EP18211061.9A priority Critical patent/EP3663186A1/de
Publication of EP3663186A1 publication Critical patent/EP3663186A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore 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
    • E02B17/0004—Nodal points
    • 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
    • E02B17/0034—Maintenance, repair or inspection of offshore constructions
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
    • E06C9/02—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/14—Arrangement of ship-based loading or unloading equipment for cargo or passengers of ramps, gangways or outboard ladders ; Pilot lifts
    • B63B27/143—Ramps
    • 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
    • E02B2017/0091—Offshore structures for wind turbines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
    • E02B3/068—Landing stages for vessels

Definitions

  • the present invention relates to a landing structure for the docking of ships, in particular transfer vessels, against offshore, in particular but not exclusively monopiles of wind farm equipment.
  • transfer vessels When operating offshore wind farms, it is necessary to transport service personnel and equipment etc. to the wind farm for service, maintenance and the like. This is normally done via the sea using transfer vessels. These transfer vessels need to be able to dock at the various different types of equipment such as platforms, wind turbine foundations or even other vessels.
  • the vessel For the docking purposes at structures such as monopile wind turbine foundations, the vessel normally makes a landing by being pressed against a suitable landing structure of the equipment under its own engine power.
  • the landing structure is normally a pair of vertical protective columns arranged with a suitable spacing to the monopile, thereby inter alia protecting the monopile from scratching or denting, the latter potentially compromising the structural integrity of the monopile.
  • this object is achieved by a landing structure for an offshore structure, said landing structure comprising a pair of parallel columns interconnected by a ladder where the stringers of the ladder extend in parallel with the columns, wherein the columns comprise attachment means for releasable attachment to the offshore structure.
  • the attachment means comprises at least one pair of mounting flanges arranged one on each of a pair of spacers extending from each of the pair of columns, respectively. This, allows the landing structure to be attached to a corresponding flange or attachment point on the offshore structure.
  • the mounting flanges comprise an alignment recess adapted to engage a corresponding flange or attachment point on the offshore structure.
  • the alignment recess acts as an alignment means and as a hook for temporarily holding the landing structure on the corresponding flange or attachment point until permanently secured by other means such as bolts.
  • the attachment means comprises connection points for elongated supports. This allows the landing structure to be secured to the offshore structure using elongated supports such as straps, cables, rods, wires, or the like.
  • the landing structure further comprises at least one further pair of spacers, wherein the further pair of spacers comprise pads adapted for abutting said offshore structure.
  • These further pairs of spacers work in conjunction with the elongated supports. When tensioned the supports pull the spacers into firm engagement with the offshore structure, thus securing the landing structure in position.
  • the pads comprise a protective covering adapted to protect said offshore structure.
  • the protective covering prevents the pads from wearing, scratching or other abrasive influence on the protective coating of the offshore structure, which needs to be kept in good condition to protect the offshore structure against the harsh offshore marine environment.
  • the protective covering comprises an elastomer and/or polymer material.
  • Elastomers generally provides a good contact, while preventing lateral slipping and thus the above mentioned risk of wearing, scratching or other abrasive influence.
  • suitable polymer materials may have low friction and thus prevent the above mentioned risk of wearing, scratching or other abrasive influence.
  • the object is achieved by an offshore structure adapted for receiving a landing structure according to the first aspect of the invention and embodiments thereof. This allows the in-situ retrofitting of a landing structure on an already erected offshore structure.
  • the offshore structure comprises attachment points adapted to receive a landing structure according to any one of the preceding claims.
  • a removal protective cover adapted to be arranged on the attachment points.
  • a protective cover may prevent entanglement of hoisting cables and damage to objects and personnel, which may bounce against them during hoisting onto the structure in the absence of the landing structure.
  • the object is achieved by system comprising a landing structure according to the first aspect of the invention and embodiments thereof and an offshore structure according to the second aspect of the invention and embodiment thereof.
  • the object is achieved by a method for retrofitting a landing structure on an offshore structure, comprising the steps of erecting an offshore structure and attaching a landing structure according to the first aspect of the invention including any of the above mentioned embodiments thereof to the erected offshore structure.
  • a section of an offshore structure 1 is shown.
  • the offshore structure 1 is exemplified by a wind turbine generator, e.g. the steel tower or steel transition piece mounted on a monopile foundation rammed into the seabed.
  • the offshore structure comprises a platform 2.
  • the platform 2 is arranged quite a distance i.e. about 20 metres or more above sea level, depending of course on tide, waves etc.
  • the platform has been accessed by climbing a ladder forming a part of a landing structure mounted on the offshore structure.
  • This novel offshore structure 1 does not have a landing structure and ladder mounted, and the intention is to hoist or otherwise move personnel to the platform 2 from a crew transfer vehicle (not shown).
  • the offshore structure 1 is prepared for retrofitting a landing structure only in the event it later turns out to be necessary, thus saving the initial costs for a landing structure.
  • the offshore structure 1 comprises a pair of attachment points 3.
  • the attachment points 3 are mounted at a distance from the offshore structure 1 on corresponding protrusions 4.
  • the attachment points 3 are preferably a pair of flanges 5 with V-shaped cut-outs 18 in the top for alignment of a landing structure 6 according to the invention as shown in Figs. 2 to 4 .
  • the landing structure 6 according to the invention is retrofittable in-situ to the already erected offshore structure 1. This can readily be done by the use of conventional existing equipment.
  • the attachment points 3 will normally be covered by a pair of covers 21, so as to cover the edges and protrusion, as seen in Fig. 7 in comparison with the corresponding view in Fig. 5 . Covering the attachment points 3 will prevent hoisting cables or the like to be caught on the unused attachment points 3 when transferring objects and personnel to the platform 2 under normal use. Likewise, it will reduce the risk of potential injuries to persons and objects directly hitting the attachment points 3 during hoisting or the like onto the platform 2 of the offshore structure 1.
  • the covers 21 are preferably made of a suitable polymer material, such as e.g. HDPE or other material capable of withstanding the harsh marine offshore environment.
  • the offshore structure 1 further comprises a pair of anchoring points 7 adapted to receive a number of elongated supports 8 for securing the landing structure 6.
  • the elongated supports 8 comprise suitable tensioning means which are as such well known in the art.
  • the elongated supports 8 are preferably steel bands, but other suitable elongated supports comprising cables, wires, rods, chains etc. may be employed.
  • the elongated supports 8 are preferably attached to anchoring points 7 with some degree of freedom for pivotal or rotary motion. The same may apply to the attachment to the connection points 9. That is to say the connections are not necessarily bolted or in otherwise fixed engagement,but could be T- or ball-shaped heads interlocking with the anchoring points 7 or the connection points under tension only.
  • the landing structure 6 comprises a pair of columns 10.
  • the columns 10 are sturdy enough to resist impact and forces from a crew transfer vessel docking against them.
  • the columns 10 are interconnected by means of a ladder 11.
  • the stringers 12 of the ladder 11 extend generally in parallel with the columns 10,but is off-set with respect to the common plane of the columns 10.
  • the stringers 12 are interconnected by the rungs 13 of the ladder 11, and the stringers in turn are connected to the columns 10 by means of a suitable number of struts 14.
  • a pair of spacers 15, one for each column 10 is provided.
  • the free end of the spacers 15 are provided with mounting flanges 16 adapted to engage the flanges 5 on the offshore structure 1.
  • the top of the mounting flanges 16 each comprise an alignment recess 17 adapted to engage around the top of the corresponding flange 5 on the offshore structure 1.
  • the bottom of the alignment recess is 17 preferably adapted to match the V-shaped cut-out 18 in the corresponding flanges 5 on the offshore structure 1.
  • the alignment recess 17 furthermore serves as a hook to hold the landing structure 6 temporarily on the offshore structure 1, until the mounting flanges 16 are secured to the corresponding flanges 5.
  • the mounting flanges 16 are secured to the corresponding flanges 5 by means of nuts and bolts, but other well-known means such as welding or riveting could be envisaged.
  • the lower part of the landing structure may be secured to the offshore structure 1 by attaching the elongated supports 8 to the respective connection points 9 and to the anchoring points 7. Tensioning the supports 8 will force a number of further spacers 19 into engagement with the offshore structure and thus secure the lower part of the landing structure 6 against the offshore structure 1.
  • the further spacers 19 are preferably provided with pads 20 adapted to engage the offshore structure 1.
  • the pads 20 have a suitably large surface to decrease the pressure against the surface of the offshore structure 1 to a suitable level.
  • the pads 20 are furthermore preferably covered in an elastomeric and or polymer material in order to reduce the risk of wearing, scratching or other abrasive influence on the protective coating of the offshore structure 1, which must be kept intact in order to protect properly against the corrosive influences of the salty maritime offshore environment.
  • the coating could be any suitable polymer coating with low friction and suitable elastic properties to avoid such wearing, scratching or other abrasive influence.
  • the polymer could also be an elastomer with good impact damping properties, and good friction properties to prevent abrasion from e.g. slipping and sliding of the pad along the surface of the offshore structure 1.
  • suitable coatings could be neoprene, nylon or Teflon.
  • the elongated supports 8 are coated with similar or the same material as the pads, at least on the side facing the offshore structure 1, when installed. This will prevent the material of the elongated supports 8, e.g. steel, from of wearing, scratching or otherwise damaging the coating of the offshore structure 1 by abrasive influence.
  • the landing structure 6 may include a landing 22 at the top for making a transition to an additional ladder 23 mounted directly on the platform 2 as a separate piece, when retrofitting the offshore structure 1 with the landing structure 6.
  • the offshore structure 1 is adapted to allow the docking of suitably equipped vessels directly at the offshore structure 1.
  • the offshore structure preferably has a designated area 24, covering a predetermined angle, such as 160 degrees of the circumference of the offshore structure 1, as indicated by the dashed lines 25 in Fig 6 .
  • the surface of the offshore structure 1 may be covered with a more robust heavy-duty coating than the remainder of the offshore structure. That is to say a coating not only able to withstand the harsh offshore marine environment, but also suitable for protecting the offshore structure 1 from scratching, abrasion, piercing by a docking vessel.
  • heavy-duty coatings could be Hempadur 45753, Teknos Teknopur 300 8-00, LINE-X XS-BK 100, or Hempadur Spray-Guard 35490.
  • the offshore structure 1 is preferably provided with markings.
  • markings could comprise a pair of vertical lines 26, preferably in a suitable colour, such as red, standing out from the colour of the coating of the structure, which is typically yellow. These vertical lines 26 coincide with the angle spanned by the dashed lines 25 and delimit the intended docking area 25 with the heavy duty coating.
  • the markings could also include a vertical centerline marking 27, midway between the vertical lines 26 and preferably in a different colour such as black, to avoid confusion.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Wind Motors (AREA)
EP18211061.9A 2018-12-07 2018-12-07 Landestruktur für eine offshore-struktur Withdrawn EP3663186A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18211061.9A EP3663186A1 (de) 2018-12-07 2018-12-07 Landestruktur für eine offshore-struktur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18211061.9A EP3663186A1 (de) 2018-12-07 2018-12-07 Landestruktur für eine offshore-struktur

Publications (1)

Publication Number Publication Date
EP3663186A1 true EP3663186A1 (de) 2020-06-10

Family

ID=64664587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18211061.9A Withdrawn EP3663186A1 (de) 2018-12-07 2018-12-07 Landestruktur für eine offshore-struktur

Country Status (1)

Country Link
EP (1) EP3663186A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117022554A (zh) * 2023-08-17 2023-11-10 上海勘测设计研究院有限公司 一种高干舷漂浮式风机基础的靠泊登乘系统及设计方法
EP4206068A4 (de) * 2021-02-22 2023-11-22 Sustainable Works Corporation Offshore-struktur, kotflügelvorrichtung für eine offshore-struktur und verfahren zum bewegen auf einen strukturkörper, der eine offshore-struktur bildet

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473490A (en) 2009-09-15 2011-03-16 William Jonathan Aldiss Progressive bow transfer apparatus and method
GB2489679A (en) 2011-03-30 2012-10-10 Andrew Francis White Transfer vessel with a bow shaped for berthing
DE102012019554A1 (de) * 2012-10-05 2014-04-10 Kme Germany Gmbh & Co. Kg Bootsanleger
GB2520094A (en) 2013-09-17 2015-05-13 Alicat Workboats Ltd Pole Engagement device for marine vessels
EP3064648A1 (de) * 2015-03-06 2016-09-07 AMBAU GmbH Bootsanleger für eine offshore-anlage, offshore-anlage mit einem solchen bootsanleger und verfahren zum montieren des bootsanlegers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2473490A (en) 2009-09-15 2011-03-16 William Jonathan Aldiss Progressive bow transfer apparatus and method
GB2489679A (en) 2011-03-30 2012-10-10 Andrew Francis White Transfer vessel with a bow shaped for berthing
DE102012019554A1 (de) * 2012-10-05 2014-04-10 Kme Germany Gmbh & Co. Kg Bootsanleger
GB2520094A (en) 2013-09-17 2015-05-13 Alicat Workboats Ltd Pole Engagement device for marine vessels
EP3064648A1 (de) * 2015-03-06 2016-09-07 AMBAU GmbH Bootsanleger für eine offshore-anlage, offshore-anlage mit einem solchen bootsanleger und verfahren zum montieren des bootsanlegers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4206068A4 (de) * 2021-02-22 2023-11-22 Sustainable Works Corporation Offshore-struktur, kotflügelvorrichtung für eine offshore-struktur und verfahren zum bewegen auf einen strukturkörper, der eine offshore-struktur bildet
CN117022554A (zh) * 2023-08-17 2023-11-10 上海勘测设计研究院有限公司 一种高干舷漂浮式风机基础的靠泊登乘系统及设计方法

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