WO2001071105A1 - Procede de realisation dans un fond marin de la fondation d'une installation off shore, et fondation associee - Google Patents

Procede de realisation dans un fond marin de la fondation d'une installation off shore, et fondation associee Download PDF

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Publication number
WO2001071105A1
WO2001071105A1 PCT/DK2001/000189 DK0100189W WO0171105A1 WO 2001071105 A1 WO2001071105 A1 WO 2001071105A1 DK 0100189 W DK0100189 W DK 0100189W WO 0171105 A1 WO0171105 A1 WO 0171105A1
Authority
WO
WIPO (PCT)
Prior art keywords
foundation
bed
seabed
chambers
rim
Prior art date
Application number
PCT/DK2001/000189
Other languages
English (en)
Inventor
Bruno Schakenda
Svein Rune Gjerde
Original Assignee
Bruno Schakenda
Svein Rune Gjerde
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 Bruno Schakenda, Svein Rune Gjerde filed Critical Bruno Schakenda
Priority to AU2001242311A priority Critical patent/AU2001242311A1/en
Priority to DE60132182T priority patent/DE60132182T2/de
Priority to EP01915111A priority patent/EP1268947B1/fr
Priority to DK01915111T priority patent/DK1268947T3/da
Publication of WO2001071105A1 publication Critical patent/WO2001071105A1/fr

Links

Classifications

    • 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
    • E02B17/0017—Means for protecting offshore constructions
    • E02B17/0021—Means for protecting offshore constructions against ice-loads
    • 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
    • E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
    • 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
    • E02B2017/0078—Suction piles, suction cans

Definitions

  • the present invention concerns a method for establishing a foundation in the seabed for an offshore facility, comprising a bed foundation for placing at the sea bed and carrying a structure for supporting a facility above sea level. Furthermore, the invention concerns a foundation for use in the method.
  • offshore facilities is meant offshore constructions in the widest sense, including both facilities on open sea and in lakes, including such for oil and gas platforms and sea based windmills as well as quay facilities and bridges.
  • seabed is also meant coastal areas as in harbours and lake bottom. The invention finds application on depths less than 50 m.
  • bed foundations are made as caissons which are towed out to the location and then submerged with water and possibly supplied with ballast.
  • the constructions are made in concrete and suitable in case of large constructions.
  • the weight of the caisson ensures the stability on the seabed but is at the same time as relatively expensive way of establishing the foundation. In certain cases it is also desirable to remove the foundation again which is particularly difficult when speaking of caissons.
  • WO 9406970 From WO 9406970 is known a construction where the legs of the offshore facility is placed in the seabed by having a structure lowermost on the leg and which is suited for being sucked down into the bed.
  • the structure consists of a number of chambers.
  • pumps are activated in each chamber, evacuating the water and thereby inducing an underpressure which causes the chambers to be sucked down into the seabed.
  • spray nozzles may be mounted on the lowermost edges of the structure which by means of water pressure may loosen these hard layers and thereby enhance the sinking down of the structure into the bed.
  • the seabed is damaged in a zone around the foundation why the foundation either has to be moved to another locality with untouched seabed, or the area around the structure has to be re-established so that it may be avoided that renewed pumping in the structure causes a new collapse.
  • the purpose of the invention is to provide a method and a foundation as indicated above which is lighter than the known constructions and which simultaneously may be secured in a simple and stable way in the seabed.
  • the bed foundation which is hollow, downwardly open, and provided with parallel or unidirectional side walls, of which the side consists of a double wall construction made up of an outer skirt and inner skirt concentric therewith, and a rim at the bottom substantially extending in the same plane, are positioned with the rim on the seabed, so that at least one substantially pressure tight cavity is formed inside the foundation, after which, by pumping out the contents of the cavity, an underpressure of such a magnitude is established inside the cavity in the double wall construction so that a water current occurs through the seabed material about the rim from the surroundings around the foundation, and inwards towards the cavity and so that a fluidization and removal of seabed material at the rim occurs with the consequence that the foundation sinks down into the seabed, and that the pumping is continued until the seabed foundation has attained a desired level in the seabed.
  • the peculiar feature of the foundation according to the invention is that the bed foundation is hollow, downwardly open and provided with parallel or unidirectional sides and with a downwardly facing rim surrounding the formed opening and mainly extending in the same plane.
  • the bed foundation may thereby be made as a relatively light steel construction which in design largely resembles a bell with double wall construction and which is preferred made as cylinder, though other geometries are possible, for example, with elliptical or polygonal cross-section.
  • the foundation, including the submarine structure is shipped out on location and put on the bed which is levelled approximately as a plane.
  • hoses are connected and led up to a vessel on the water surface. With pumps in the vessel a vacuum may be formed inside the cavity in the double wall construction, and the water standing inside the cavity may be pumped away in a controlled way.
  • the water surrounding the bed foundation will therefore seek into the cavity through the material in the sea bed which in practice consists of sand or silt in a sufficiently deep surface layer. Thereby, a quicksand-like condition is formed at the lower rim of the bed foundation, after which the entire foundation sinks down into the sea bed. The downward movement is stopped by stopping the pump operation when the bed foundation is sufficiently deeply sunk into the seabed.
  • an underpressure may be create by pumping from the cavity formed inside the foundation within the inner skirt which is limiting the cavity at the rim.
  • an inner cavity and an outer, coaxially arranged, cavity in the double wall construction we are speaking of an inner cavity and an outer, coaxially arranged, cavity in the double wall construction.
  • the total downward sucking force is increased.
  • the underpressure in the inner cavity is, however, to be limited so that the seabed is not destroyed due to disintegration.
  • a protective layer may be laid out the foundation zone, for example, in the form of a stone layer which may keep the seabed down but allow water transport.
  • a filter may be arranged, either alone or in combination with other means inside the foundation for avoiding removal of material within the rim.
  • a righting layer may also be laid out on the bed.
  • the seabed consists of a sand layer at the top, which possibly may shift, i.e. due to current
  • the thickness of the layer may vary and it may be an advantage to remove a part of the shifting sand layer at first.
  • the foundation may be placed on a more stable bed.
  • the foundation is ensured a secure founding as by removing the shifting sand layer completely or partly it is ensured that the founding depth does not become less due to shifting sand.
  • shifting sand layer or soft silt layers and mud can not provide the needed sealing around the foundation in order that the needed underpressure may be established so that the foundation can sink down into the seabed.
  • vibration units arranged detachably on the foundation so that, when there are hard soil layers under the location of the foundation, the combination of underpressure, fluidization at the rim and vibrations may co-operate in enhancing the sinking down of the foundation.
  • the foundation inclines and where a stone pad is laid out as levelling layer, the foundation may advantageously be vibrated through this layer as it is often not possible to establish underpressure through the porous stone layer.
  • the nozzles are connected with a supply device which may supply a sliding agent to the nozzles, for example, a ben- tonite suspension, boring mud or similar non-contaminating agent with lubricating properties.
  • the device may advantageously be designed as a triangle, where one point is turning downward in relation to the foundation but the device may have any geometric shape, the important part being that the device is projecting out over the foundation wall as mentioned above so that the lubricating film may be formed between the clay and the foundation wall.
  • a hollow will appear above the nozzle device along the foundation wall and will be filled out by the supplied lubricant, whereby a film of lubricant is formed between the foundation wall and the clay.
  • the friction between the clay and the foundation is broken, and the lowering of the foundation is advanced.
  • the different processes are combined so that fluidization at the rim is used through the sand/silt layers as described above.
  • the underpressure in the inner of the foundation is adjusted, i.e. within the rim, so that disintegration of the bed is avoided.
  • these can not be fluidised to the same degree as the sand/silt layers, why lubricant is added as described above.
  • the invention provides a possibility of displacing this foreign matter away from the course of bringing down of the foundation.
  • the invention has some further advantages.
  • the mills are to be stopped, which may be due to technical service or stoppage in connection with too high wind speeds.
  • the stoppage may apply large dy- namic forces, though very limited in time, to the foundation as well as the construction will typically experience vibrations in connection with the natural oscillations of the construction in the natural frequency range. The same is the case when starting the mill again.
  • the carrying ability/securing ability of the foundation is temporarily increased. This implies that a foundation may be dimensioned for the situation of use but the extra security due to the overconsolidation so that it may resist the peak load, like storm, braking or starting. Likewise, the natural frequency of the construction may be changed to a certain degree during braking/starting.
  • the bed foundation is divided into separate chambers of which several mutually pressure tight chambers are evenly distributed between the outer and the inner skirt, and where different pressures or underpressures are established in different chambers so that a moment about a substantially horizontal axis is induced.
  • the bed foundation is divided into separate chambers of which several mutually pressure tight chambers are evenly distributed along the side of the bed foundation.
  • a valve is mounted in each chamber with each their hose connection to the pump equipment on the vessel at the surface.
  • Figs. 1 - 3 show a first embodiment of a foundation according to the invention as seen from the side, in section along the line II-II in Fig. 1, and in perspective from below, respectively
  • Fig. 4 show in a perspective view from below a second embodiment of a foundation according to the invention
  • Figs. 5 - 7 show in principle three different steps during performing the method according to the invention
  • Fig. 8 shows a detail of the lower edge of the rim in a modified embodiment
  • Fig. 9 shows a outlined section of the rim shown in Fig. 8.
  • the first embodiment of the foundation according to the invention shown on Figs. 1-3 consists of a bottom part 1 or bed foundation which has cylindric shape with a flat top sheet 3.
  • a columnar structure 5 forming connection between the bottom part 1 and the facility 6 to be placed in a sea or lake area; the water surface is designated 8 and the seabed 10.
  • the structure has a conical transition 7 between the bottom part 1 and a columnar section 9.
  • annular, concave body 1 1 of the columnar section 9 for use in waters with ice load.
  • the body 1 1 is known per se and may be omitted in ice-free waters.
  • the entire foundation is made in welded steel sheets, and thereby the construction may be made relatively light; for small constructions on depths up to 10 m, the construction will often weigh less than 200 t.
  • the foundation may also be made in other materials like concrete, composite materials and similar.
  • the bottom part 1 consists of an outer skirt 13 and an inner skirt 15 concentric therewith which together constitute a double wall construction.
  • Both skirts 13,15 extend from their lower rims 17 and 19 to the underside of the top sheet 3 whereby a cylindric cavity 21 is formed within the inner skirt 13 and an annular cavity between the skirts 13 and 15.
  • radially extending partitioning walls or bulkheads 23 are found, dimensioned for resisting differential pressures so that different pressures may be maintained between mutually adjoining elongate cavities 25 formed thereby between the skirts 13 and 15.
  • the inner cavity may in another, not shown embodiment be provided with mutually perpendicular sheets 27 as outlined with stippled lines on Fig. 2 with regard to the strength and stability of the bottom part 1. These sheets 27 does not have to be dimensioned or sealed along the edge with regard to differential pressure as well as the ⁇ * do not have to extend in the full height of the bottom part 1.
  • a second embodiment shown on Fig. 4 has a cylindric outer skirt 30 which is slotted and provided with four cylindric chambers 32 which are open downwards and closed upwards by one or more top sheets.
  • the skirt forms a cavity 21.
  • the chambers 32 have the same function as the chambers 25 above in the subsequent description. This em- bodiment may be varied with another number of chambers 32 than shown.
  • a further version of the embodiment on Fig. 4 would be to omit slotting the skirt 30 and to dispose the elongate chambers at the outer side of the skirt 30 (not shown).
  • the bottom part 1 is not provided with inner skirt 13 and bulkhead 23 so that only one cavity exists.
  • a not shown support which may guide the entire foundation so that it is guided vertically during the bringing down into the seabed.
  • FIG. 5- A preferred embodiment of the method according to the invention is shown on Figs. 5-
  • the foundation according to the invention is shipped out to the location and placed on the bottom of the sea.
  • the seabed 10 is levelled so that an approximately horizontal surface is achieved on the place of erection.
  • the levelling or preparing of the seabed may occur by flushing away loose material or by laying out a stone pad and/or a filter layer in the form of a geo-fabric or similar.
  • the rims 17 and 19 then rest on the seabed.
  • the chambers 25 there are water and possibly some air.
  • At the top of each chamber 25 there is a not shown valve opening to which is connected a suction hose 40.
  • a pump unit 44 In a barge 42 from which the operation is controlled, there is a pump unit 44 with a branch with connection to, in this case, six hoses 40 for the shown embodiment of the bottom part 1.
  • the pumping pressure is adjusted according to the nature of the seabed, and the indicated values are thus only examples of a typical seabed of the indicated type.
  • Surface air may initially stand in the chambers 25 but is quickly led out, and water is pumped out instead.
  • the difference between the pressure in the water at the seabed 10 and the pressure inside the chambers 25 is then atmospheric pressure plus the water pressure determined by the water depth minus the absolute pressure in the chambers. On 10 meters of water, the difference is close to 2000 hPa (2 bar). Thereby is achieved a water current through the relatively loose bottom material from the outside to the inside of the bottom part 1 as shown with the arrows 46, see Fig. 6.
  • the water current runs from the surface of the seabed, down through the bed material, under the rim 17 and up through the bed material and into the chambers 25. Also, a current is formed through the bottom material in the cavity 21 and as shown with the arrow 48.
  • the water current which does not have any significant size, typically about 300 1/min, is sufficient for forming a quicksand-like condition under the rims 17 and 19, after which the seabed yields to the relatively sharp rims 17.19. and the foundation sinks down into the seabed due to its weight.
  • the co- lumnar structure 5 may in this case be filled with water.
  • Fig. 8 illustrates a detail of a foundation wall where on the lower rim there is arranged a device 60. in which is arranged a number of nozzles 61 evenly distributed along the whole periphery of the lower rims of the foundation 1.
  • Fig. 9 is illustrated a cross- section of the foundation rim at the bottom with a device arranged according to an example of the invention.
  • the nozzles 61 are connected with a supply device 63 which can supply the nozzles 61 with a sliding agent, for example, a bentonite suspension, boring mud or similarly non- contaminating agent with lubricating properties.
  • the device 60 may advantageously be designed as a triangle where one point is facing downward in relation to the foundation.
  • a hollow will appear above the nozzle device 60 along the foundation wall 13,15 which becomes filled out by the supplied lubricant whereby between the foundation wall and the clay is formed a film 62 of lubricant.
  • the friction between the clay and the foundation is broken, and the lowering of the foundation is advanced.
  • Fig. 8 where it is illustrated how the nozzles 61 form a clay film 62 on the walls 13,15 of the foundation.
  • the foundation is to be removed after use, it is considerably easier to lift up or cut off over the bed than concrete foundations constructed as caissons. Removal of the foundation may be facilitated by using reversed technique compared with the bringing down, namely by pumping water into the chambers 21.25 and thereby create overpressure in the chambers 21,25, whereby the foundation is pressed up from the bed again. Removal may be further assisted by using hammer devices which in principle are mounted and work, though only upwards or sidewards, as the units 50. This is of significance in waters where the authorities require removal of foundations after use.

Abstract

L'invention porte sur une fondation pour installation off shore, de préférence pour eaux peu profondes comportant un fond (1) de tôles d'acier sensiblement en forme de cloche présentant une cavité centrale (21) et des chambres périphériques étanches (25) séparées par des cloisons (23). La fondation ayant été descendue sur un fond (10) sabloneux (marin ou lacustre), on crée dans les chambres une dépression provoquant un courant d'eau traversant le fond autour de la couronne inférieure (17, 19) de la fondation. Le matériau du fond étant ainsi fluidifié, la fondation s'enfonce sous son propre poids. On peut moduler la fluidification des différentes parties de la couronne (17, 19) en soumettant les différentes chambres (25) à des pressions différentes, ce qui permet de redresser la fondation et de compenser les inégalités du fond etc. On évite ainsi le recours à des caissons de béton tout en satisfaisant la protection de l'environnement qui demande le retrait des fondations après usage, la dusdite fondation étant considérablement moins lourde et plus facile à extraire.
PCT/DK2001/000189 2000-03-23 2001-03-22 Procede de realisation dans un fond marin de la fondation d'une installation off shore, et fondation associee WO2001071105A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2001242311A AU2001242311A1 (en) 2000-03-23 2001-03-22 Method for establishing a foundation in a seabed for an offshore facility and the foundation according to the method
DE60132182T DE60132182T2 (de) 2000-03-23 2001-03-22 Verfahren zur herstellung eines fundaments für offshore-installationen im meeresboden sowie entsprechendes fundament
EP01915111A EP1268947B1 (fr) 2000-03-23 2001-03-22 Procede de realisation dans un fond marin de la fondation d'une installation off shore, et fondation associee
DK01915111T DK1268947T3 (da) 2000-03-23 2001-03-22 Havbundsfundament

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200000490 2000-03-23
DKPA200000490 2000-03-23

Publications (1)

Publication Number Publication Date
WO2001071105A1 true WO2001071105A1 (fr) 2001-09-27

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PCT/DK2001/000189 WO2001071105A1 (fr) 2000-03-23 2001-03-22 Procede de realisation dans un fond marin de la fondation d'une installation off shore, et fondation associee

Country Status (8)

Country Link
EP (1) EP1268947B1 (fr)
AT (1) ATE382746T1 (fr)
AU (1) AU2001242311A1 (fr)
DE (1) DE60132182T2 (fr)
DK (1) DK1268947T3 (fr)
ES (1) ES2299477T3 (fr)
PT (1) PT1268947E (fr)
WO (1) WO2001071105A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003100178A1 (fr) * 2002-05-27 2003-12-04 Vestas Wind Systems A/S Procede de montage d'une eolienne, socle pour eolienne et ensemble d'eoliennes
WO2004087494A3 (fr) * 2003-04-04 2004-12-16 Logima V Svend Erik Hansen Navire pour le transport d'eoliennes, procedes de deplacement d'eolienne et eolienne pour centrale eolienne en mer
US7234409B2 (en) 2003-04-04 2007-06-26 Logima V/Svend Erik Hansen Vessel for transporting wind turbines, methods of moving a wind turbine, and a wind turbine for an off-shore wind farm
WO2007115573A1 (fr) * 2006-04-10 2007-10-18 Marcon A/S Structure de fondation
WO2013117197A2 (fr) 2012-02-10 2013-08-15 Universal Foundation A/S Procédé d'installation d'une fondation sur le fond marin et fondation
KR20140003217U (ko) * 2012-11-21 2014-05-30 대우조선해양 주식회사 해양 구조물용 석션 앵커
WO2014175751A1 (fr) * 2013-04-26 2014-10-30 Ces Technology As Ancre d'aspiration, segment de module composite pour une ancre d'aspiration et procédé d'assemblage de tels segments
NO335586B1 (no) * 2009-08-20 2015-01-05 Compocean As Sugeanker av fiberforsterket plast
KR20150009780A (ko) * 2013-07-17 2015-01-27 현대건설주식회사 내부지지대를 구비하는 석션파일, 석션파일 어셈블리 및 이를 이용한 해상풍력발전시설
WO2015170098A1 (fr) * 2014-05-06 2015-11-12 Renewable Hydrocarbons Ltd Structure en mer présentant capacités d'installation automatique, de mise à niveau automatique et d'empilement automatique
EP3444403A1 (fr) 2017-08-17 2019-02-20 Siemens Gamesa Renewable Energy A/S Godet d'aspiration segmenté
CN110499777A (zh) * 2019-09-17 2019-11-26 大连理工大学 一种新型钉式沉垫基础

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DE102017115817A1 (de) * 2017-07-13 2019-01-17 Ramboll IMS Ingenieurgesellschaft mbH Gründung für eine Offshore-Windenergieanlage
GB2592892B (en) 2019-12-20 2023-02-01 Subsea 7 Norway As Hollow Subsea Foundations

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GB2277547A (en) * 1993-04-29 1994-11-02 Kvaerner Earl & Wright Foundation with downwardly extending skirt

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GB1451537A (en) * 1974-04-01 1976-10-06 Langner K E Method of forming a subaqueous anchorage
EP0046418A1 (fr) * 1980-07-09 1982-02-24 COYNE ET BELLIER Bureau d'Ingénieurs Conseils Procédé d'ancrage et dispositif de fondation d'une plateforme en particulier mobile
US4733993A (en) * 1984-11-09 1988-03-29 J & W Offshore Ab Subsea foundation element and applications thereof
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Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003100178A1 (fr) * 2002-05-27 2003-12-04 Vestas Wind Systems A/S Procede de montage d'une eolienne, socle pour eolienne et ensemble d'eoliennes
CN1325792C (zh) * 2002-05-27 2007-07-11 威斯塔斯风力系统公开有限公司 安装风力发动机的方法、风力发动机底座及机组
US7281902B2 (en) 2002-05-27 2007-10-16 Vestas Wind Systems A/S Methods of mounting a wind turbine, a wind turbine foundation and a wind turbine assembly
WO2004087494A3 (fr) * 2003-04-04 2004-12-16 Logima V Svend Erik Hansen Navire pour le transport d'eoliennes, procedes de deplacement d'eolienne et eolienne pour centrale eolienne en mer
US7234409B2 (en) 2003-04-04 2007-06-26 Logima V/Svend Erik Hansen Vessel for transporting wind turbines, methods of moving a wind turbine, and a wind turbine for an off-shore wind farm
WO2007115573A1 (fr) * 2006-04-10 2007-10-18 Marcon A/S Structure de fondation
US7891910B2 (en) 2006-04-10 2011-02-22 Mbd Offshore Power A/S Foundation structure
NO335586B1 (no) * 2009-08-20 2015-01-05 Compocean As Sugeanker av fiberforsterket plast
WO2013117197A2 (fr) 2012-02-10 2013-08-15 Universal Foundation A/S Procédé d'installation d'une fondation sur le fond marin et fondation
JP2015507111A (ja) * 2012-02-10 2015-03-05 ユニバーサル ファウンデーション アクティーゼルスカブ 海底に基礎を設置するための方法及び上記海底基礎
US10113290B2 (en) 2012-02-10 2018-10-30 Universal Foundation A/S Method of installing a foundation in the sea bed and such foundation
KR200483528Y1 (ko) * 2012-11-21 2017-05-26 대우조선해양 주식회사 해양 구조물용 석션 앵커
KR20140003217U (ko) * 2012-11-21 2014-05-30 대우조선해양 주식회사 해양 구조물용 석션 앵커
WO2014175751A1 (fr) * 2013-04-26 2014-10-30 Ces Technology As Ancre d'aspiration, segment de module composite pour une ancre d'aspiration et procédé d'assemblage de tels segments
KR20150009780A (ko) * 2013-07-17 2015-01-27 현대건설주식회사 내부지지대를 구비하는 석션파일, 석션파일 어셈블리 및 이를 이용한 해상풍력발전시설
KR101584856B1 (ko) * 2013-07-17 2016-01-21 현대건설주식회사 내부지지대를 구비하는 석션파일
US9890509B2 (en) 2014-05-06 2018-02-13 Renewable Hydrocarbons Ltd. Offshore structure with self-install, self-level and self-pile capabilities
WO2015170098A1 (fr) * 2014-05-06 2015-11-12 Renewable Hydrocarbons Ltd Structure en mer présentant capacités d'installation automatique, de mise à niveau automatique et d'empilement automatique
EP3444403A1 (fr) 2017-08-17 2019-02-20 Siemens Gamesa Renewable Energy A/S Godet d'aspiration segmenté
WO2019034616A1 (fr) 2017-08-17 2019-02-21 Siemens Gamesa Renewable Energy A/S Baquet d'aspiration segmenté
US11261575B2 (en) 2017-08-17 2022-03-01 Aalborg University Segmented suction bucket
CN110499777A (zh) * 2019-09-17 2019-11-26 大连理工大学 一种新型钉式沉垫基础

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DK1268947T3 (da) 2008-05-13
AU2001242311A1 (en) 2001-10-03
ATE382746T1 (de) 2008-01-15
EP1268947A1 (fr) 2003-01-02
DE60132182D1 (de) 2008-02-14
DE60132182T2 (de) 2009-01-02
PT1268947E (pt) 2008-04-11
ES2299477T3 (es) 2008-06-01
EP1268947B1 (fr) 2008-01-02

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