EP2546418B1 - Procédé permettant de fournir une fondation pour une masse située en hauteur - Google Patents

Procédé permettant de fournir une fondation pour une masse située en hauteur Download PDF

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Publication number
EP2546418B1
EP2546418B1 EP12175860.1A EP12175860A EP2546418B1 EP 2546418 B1 EP2546418 B1 EP 2546418B1 EP 12175860 A EP12175860 A EP 12175860A EP 2546418 B1 EP2546418 B1 EP 2546418B1
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EP
European Patent Office
Prior art keywords
piles
positioning frame
positioning
foundation
frame
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.)
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Application number
EP12175860.1A
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German (de)
English (en)
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EP2546418A1 (fr
Inventor
Luc VANDENBULCKE
Koen Vanderbeke
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Deme Offshore BE NV
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Deme Offshore BE NV
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Priority to PL12175860T priority Critical patent/PL2546418T3/pl
Publication of EP2546418A1 publication Critical patent/EP2546418A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
    • E02D13/04—Guide devices; Guide frames
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • 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
    • E02D27/52—Submerged foundations, i.e. submerged in open water
    • 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

Definitions

  • the invention relates to a method for providing a foundation for a mass located at height, comprising the jacket of a wind turbine or a jetty, wherein the foundation comprises a quantity of piles driven into a bottom in a geometric pattern.
  • the invention will be elucidated hereinbelow with reference to an offshore wind turbine.
  • the reference to a wind turbine in no way implies that the invention is limited to the use in the context of such a wind turbine.
  • the method can likewise be applied on a jetty.
  • the support structure of a wind turbine normally has a slender design, for instance in the form of a tube or pillar. This pillar structure has to be coupled to a foundation in the bottom.
  • offshore wind turbines which are placed in relatively shallow water, it is possible to make use of one mast extending from the machinery housing of the wind turbine to the foundation.
  • the support structure of an offshore wind turbine can also comprise a tubular upper part and a lower part in the form of a lattice structure, also referred to as a jacket.
  • a large part of the jacket extends underwater, where the jacket finds support on a bottom, in many cases the underwater bottom.
  • a known method for providing a foundation for a mass located at height comprises of providing an offshore platform in the vicinity of the location provided for the foundation, determining the location for each pile, subsequently manipulating each pile using a lifting crane present on the platform and driving each pile into the bottom.
  • the jacket is arranged on the foundation formed by the quantity of piles by arranging legs of the jacket in the piles (also referred to as pin piling) or, in an alternative method, around the piles (also referred to as sleeve piling).
  • the piles are adapted in both cases to be able to receive the legs of the jacket, for instance by providing hollow piles (pin piling) or hollow legs of the jacket (sleeve piling).
  • the invention has for its object to provide a method for providing a foundation for a mass located at height which is more efficient than the known method, i.e. takes less time than the known method.
  • the method according to the invention allows a foundation to be provided in the form of a number of piles arranged in a geometric pattern in less time than known heretofore.
  • the positioning frame Once the positioning frame has been placed in the correct position (in relation to the anticipated position of the quantity of piles), it requires no further repositioning as is often necessary in the prior art because the positioning frame, due to its own weight, causes friction with the bottom, and more particularly via base plates (21a, 21b, 21c) arranged on the underside of the positioning frame. Because the positioning frame is placed into the position of use via the guiding means and the lifting means, and these lifting means can be chosen in accordance with the requirements and conditions on site, an optimum positioning of the frame is possible.
  • the positioning frame is brought into the position of use by lowering the frame via the lifting means.
  • the position of the frame in the position of use is not determined particularly accurately here, for instance in view of the often rough conditions at sea.
  • the method according to the invention therefore comprises of positioning and/or orienting the positioning frame to the position of use by means of separate positioning means.
  • Such positioning means allow displacement of the positioning frame in its entirety to the desired position of use.
  • the positioning means are adapted here such that they enable at least translations of the positioning frame relative to the bottom surface, particularly in a plane running more or less parallel to the bottom surface (referred to below as a horizontal plane), and preferably also rotations relative to the bottom surface.
  • Rotations of the frame relative to the bottom surface can here comprise rotations around an axis running substantially perpendicularly of the bottom surface, but also rotations around an axis lying in a horizontal plane or in a plane varying from a horizontal plane.
  • the method according to the invention makes it possible to increase the accuracy of positioning of the positioning frame relative to the bottom (and so also relative to the desired positions of the foundation piles) to variations in the horizontal plane of a maximum of 10 cm, preferably a maximum of 5 cm.
  • This accuracy is unprecedented for a structure with the dimensions of a positioning frame and provides a great advantage because, due to the more accurate positioning of the positioning frame, a more accurate positioning of all foundation piles to be provided in the bottom is also achieved in one operation.
  • the positioning means are adapted only to displace the positioning frame in a horizontal plane and to rotate it about an axis running substantially perpendicularly of this plane.
  • the position of use of the positioning frame corresponds to a position in which the positioning frame, and in particular the guide sleeves thereof, is ready to receive the piles.
  • the position of use is preferably located at a position in the vicinity of the bottom, and more preferably at a position in which the positioning frame substantially rests on the bottom.
  • the positioning frame can be moved along and under the guidance of the spud poles by any means known to the skilled person. It is thus possible for instance to suspend the positioning frame from a number of traction cables, wherein the cables can be varied in length by for instance winches arranged on the work deck of the platform. The cable length can be shortened or lengthened using the winches, wherein the positioning frame is respectively lifted or lowered.
  • the positioning frame is further provided with means for guiding the positioning frame along the spud poles of an offshore platform from a high position in the immediate vicinity of the work deck of the platform to a lower position, optionally onto or into the immediate vicinity of the bottom.
  • the guide means are preferably adapted such that they can guide the positioning frame along the spud poles of the platform so that the positioning frame is aligned substantially horizontally in the lower position. This can for instance take place by suspending the positioning frame by means of three, and preferably by means of four cables, wherein each cable can be varied in length independently of the other cables by winches. This is particularly important in the case of a bottom which is not wholly flat.
  • the positioning frame preferably comprises a lattice structure with a number of guide sleeves which are disposed spaced apart at the corner points thereof and which are connected by tubular lattice elements.
  • the dimensions of the positioning frame in the plane are in principle larger than the dimensions out of the plane, wherein the direction out of the plane corresponds to a direction parallel to the lifting or lowering direction of the positioning frame.
  • the guide sleeves are adapted to receive and guide the piles for driving into the bottom, and preferably comprise cylindrical casings, the longitudinal axis of which runs parallel to the direction of the positioning frame out of the plane.
  • the guide sleeves are arranged in a geometric pattern, this pattern corresponding to the desired geometric pattern of the foundation piles.
  • the tubular lattice elements extending between the guide sleeves ensure that guide sleeves remain substantially in their position during lifting and lowering of the positioning frame.
  • the positioning frame is adapted to define a specific geometric pattern of the foundation piles. It is however also possible to make the positioning frame geometrically adaptable, for instance by providing the positioning frame with lattice elements adjustable in length and/or by providing the positioning frame with nodes which mutually connect lattice elements and allow adjustment of the angle between lattice elements. Such an embodiment allows realization of different geometric patterns of the foundation piles.
  • a method in which the positioning frame is positioned and/or oriented by engaging the frame with a remotely operated robot vehicle (ROV).
  • ROV remotely operated robot vehicle
  • a more accurate positioning is achieved in yet another embodiment according to the invention which provides a method according to claim 1, in which the positioning frame is positioned and/or oriented by engaging the frame with traction cables provided with anchors, and/or an embodiment which provides a method in which the positioning frame is positioned and/or oriented by providing the frame with an assembly of manoeuvrable thrusters.
  • Suitable are for instance azimuth thrusters comprising a propeller accommodated in a housing.
  • the housing is rotatable here so that the positioning frame can be oriented during displacement and displaced in this orientation. If desired, use can also be made of a rudder or other steering gear for orienting purposes.
  • a number of traction cables are connected on one side to the positioning frame and connected on the other side by means of the anchors to the bottom or other anchoring point.
  • the positioning frame can be displaced relative to the anchoring points by changing the free length of the traction cables, for instance by means of winches.
  • the above stated embodiments all have the advantage that the positioning of the positioning frame relative to the bottom can take place independently of the platform, which enables corrections of the position, wherein translations in the horizontal plane and possible rotations of the positioning frame relative to the underwater bottom are all possible.
  • a preferred embodiment of the method according to the invention comprises of establishing the position of at least one pile and positioning the positioning frame such that at least one of the guide sleeves of the positioning frame is aligned with the position of the pile, in other words is located directly above said pile position.
  • the arranging of a first pile through the at least one guide sleeve fixes the positioning frame. In such a position the guide sleeves for the other piles will automatically be located in their correct positions because their relative positions are determined by the geometric design of the positioning frame. A position determination for each individual pile is hereby no longer necessary.
  • the guide sleeves of the positioning frame are adapted to receive and guide piles when they are carried into the bottom.
  • the guide sleeves preferably have a diameter which is at least as large as the cross-section of the piles.
  • use is preferably made of guide sleeves, the inner surface of which is provided along at least a portion of the length of the guide sleeves with support ribs for the piles.
  • the piles are preferably driven so far through the guide sleeves that the top of the piles extends further than the underside of said portion (provided with support ribs) of the length of the guide sleeves.
  • the method according to the invention is preferably characterized in that the foundation piles are arranged in the bottom by being driven into the bottom by the action of hydraulic or pneumatic hammer devices, vibrating hammer devices and/or oscillators. Such devices can be disposed on the floating device or on another floating device located in the vicinity. More preferred is a method in which the piles are driven into the bottom further than said portion (provided with support ribs) by the follower of a pneumatic hammer.
  • a pneumatic hammer with follower is per se known to the skilled person.
  • Another embodiment of the invention relates to a method according to claim 1, in which the arranging of the piles in the bottom is performed by drilling the foundation piles, and/or shafts in which the foundation piles are arranged, into the underwater bottom by means of drilling means.
  • the drilling is performed by means of reverse circulation drilling ( figure 15 ) by pre-drilling with a casing ( figure 14 ) and/or by rock-socketing.
  • a method comprising the step of removing the positioning frame once the piles have been arranged in the bottom, wherein the removal of the positioning frame is performed by lifting thereof with guiding by the spud poles from the lower position to the high position in the vicinity of the work deck of the platform.
  • the invention further relates to a method for installing on a foundation a mass located at height, such as the jacket of a wind turbine or a jetty, wherein the foundation comprises a number of piles arranged by means of the above described method in a bottom, with the features of claim 1, the method comprising of arranging legs of the mass located at height into or around the piles.
  • a method is more preferably provided comprising of anchoring the legs to the piles by means of grouting.
  • the method according to the invention can be applied to provide a foundation of the above described type, the method is preferably applied on a bottom located underwater.
  • the method according to the invention is further particularly suitable for cylindrical (hollow) foundation piles with a length of more than 20 m, more preferably at least 25 m and most preferably at least 30 m, and a weight of 20 to 150 tonnes, more preferably of 40 to 130 tonnes and most preferably of 50 to 110 tonnes.
  • the guide sleeves preferably have a height (the dimension in the longitudinal direction of the guide sleeves) of at least 1 m, more preferably at least 3 m and most preferably at least 5 m, in order to further be able to guarantee the desired guiding function and vertical alignment of the foundation piles.
  • a positioning frame is provided, which frame is adapted to provide a foundation for a mass located at height, such as the jacket of a wind turbine or a jetty, wherein the foundation comprises a number of piles driven into a bottom in a geometric pattern, which positioning frame comprises a number of mutually connected guide sleeves arranged in a geometric pattern and adapted to receive and guide a pile to be driven into the bottom, in addition to means for positioning and/or orienting the positioning frame, the means comprising an assembly of manoeuvrable thrusters.
  • Shown with reference to figure 1 is a device that can be used in the method according to the invention in the form of a positioning frame 1 which comprises at the corner points four cylindrical guide sleeves (2a, 2b, 2c, 2d) adapted to receive and guide a pile.
  • Guide sleeves (2a, 2b, 2c, 2d) are rigidly connected to each other by side lattices (3a, 3b, 3c, 3d) which are constructed from a relatively large number of tubular structural elements (4a, 4b, 4c, 4d).
  • Cross braces (5a, 5b, 5c, 5d) connect the side lattices (3a, 3b, 3c, 3d) to a central connecting plate 6, whereby the lattice gains structural stiffness.
  • Additional lattice elements such as as frame 3e, can be added in order to build up sufficient stiffness. All elements (2, 3, 4, 5) and connecting plate 6 define the positioning frame 1.
  • the upper parts of side lattices (3a, 3b, 3c, 3d) are advantageously provided with a peripheral catwalk 9 for easy access and inspection.
  • Guide sleeves (2a, 2b, 2c, 2d) are held in a fixed position relative to each other by the side lattices (3a, 3b, 3c, 3d) and the cross braces (5a, 5b, 5c, 5d), this such that guide sleeves (2a, 2b, 2c, 2d) are arranged in a geometric pattern, this pattern being in the embodiment shown in figure 1 a square with a side of about 20 m. Any other geometric pattern is however possible, such as a triangular pattern for instance.
  • Each guide sleeve (2a, 2b, 2c, 2d) comprises a cylindrical peripheral wall (23a, 23b, 23c, 23d) which is supported by a base plate (21a, 21b, 21c, 21d) and with which positioning frame 1 can find support on the bottom.
  • the inner surface of each guide sleeve (2a, 2b, 2c, 2d) is provided along a portion of the length of the guide sleeve with support ribs (22a, 22b, 22c, 22d) for supporting a pile when it moves through the guide sleeve.
  • the dimensions of guide sleeves (2a, 2b, 2c, 2d) can be selected within wide limits, but have in the shown embodiment a height of about 6 m.
  • Support ribs (22a, 22b, 22c, 22d) extend through a distance of about 3 m as measured from the upper edge of guide sleeves (2a, 2b, 2c, 2d), whereby the lower portion of the inner surface is without support ribs over about 3 m (and so has a larger diameter).
  • Positioning frame 1 can further be provided with means for guiding positioning frame 1 along the spud poles of an offshore platform shown in figure 2 .
  • these means comprise a structure with two U-shaped end forks (8a, 8b) which are fixedly connected to the rest of positioning frame 1 by means of tubular elements.
  • Positioning frame 1 is positioned relative to platform 10 such that a spud pole (13a, 13b, 13c, 13d) of platform 10 is partially received in the space between the outer legs (9a, 10a, 9b, 10b) of the U-shaped end forks (8a, 8b), the space being large enough to be able to receive a spud pole.
  • Positioning frame 1 can in this way be guided downward and/or upward along the spud pole(s).
  • the means for guiding the positioning frame 1 along spud poles (13a, 13b, 13c, 13d) of the platform also comprise lifting means, such as winches 15 provided on the work deck of platform 10.
  • FIG 2 A jack-up platform 10 adapted to be used in a method according to the invention is shown in figure 2 .
  • Jack-up platform 10 comprises substantially a work deck 11 and four spud pole jacks (12a, 12b, 12c, 12d) at the corner points of work deck 11.
  • Each jack (12a, 12b, 12c, 12d) operates a spud pole (13a, 13b, 13c, 13d) which can be lowered in the vertical direction 14 until the relevant spud pole finds support on bottom 30 ( figure 6 ).
  • Work deck 11 is provided with winches 15 over which run cables which are connected to positioning frame 1. Using winches 15 the positioning frame 1 can be raised or lowered in the vertical direction 14.
  • Platform 10 is further provided with two circular openings or moon pools (16a, 16b) which provide access to the water present under work deck 11 and which have a diameter which is large enough for passage of a foundation pile.
  • Platform 10 thus carries the positioning frame 1, which in the shown preferred embodiment is provided on the underside of platform 10 in a rest position in the immediate vicinity of work deck 11 of platform 10.
  • the assembly of platform 10 and positioning frame 1 is positioned such that moon pool 16b is vertically aligned with guide sleeve 2c, indicated in figure 2 with broken line 17.
  • FIG 3 an embodiment of a method not according to the invention is shown, which method is characterized by providing a floating device 60 provided with lifting means in the form of lifting crane 18.
  • Floating device 60 can for instance comprise a vessel, a platform, a pontoon or number of pontoons, and may or may not be independently driven.
  • Positioning frame 1 with the shown mutually connected guide sleeves (2b, 2c) arranged in a geometric pattern is lowered via lifting crane 18 and hoisting cables 61 onto the underwater bottom 30 into a position of use in which the frame 1 finds stable support due to the relatively wide base plates (21a, 21b, 21c, 21d) and its own weight.
  • FIG 4 shows another embodiment not according to the invention, in which floating device 60 comprises a platform 10 which supports by means of shown spud poles (13b, 13c) on the underwater bottom.
  • Positioning frame 1 is lowered via lifting crane 18 and hoisting cables 61 onto the underwater bottom 30 into the position of use, wherein the lowering of positioning frame 1 therefore takes place independently of the spud poles.
  • positioning frame 1 is positioned and/or oriented by engaging the frame 1 with a remotely operated robot vehicle 62, also referred to as a Remote Operated Vehicle or ROV, provided with a drive 63 and manipulators 64 which can engage on parts of positioning frame 1.
  • a remotely operated robot vehicle 62 also referred to as a Remote Operated Vehicle or ROV
  • ROV Remote Operated Vehicle
  • positioning frame 1 is positioned and/or oriented by engaging the frame 1 with traction cables 66 which are provided with anchors 65 and connected to positioning frame 1.
  • traction cables 66 which are provided with anchors 65 and connected to positioning frame 1.
  • the frame 1 can be accurately positioned by taking in and/or paying out the traction cables 66 by means of winches 15.
  • Positioning frame 1 can be guided here along the spud poles of platform 10 as well as independently of the spud poles.
  • Positioning frame 1 is positioned and/or oriented here by providing frame 1 with an assembly of manoeuvrable thrusters 67 which are able to drive positioning frame 1 in a chosen direction, this depending on the direction in which the manoeuvrable thrusters 67 are oriented. Positioning frame 1 can be guided here along the spud poles of platform 10 as well as independently of the spud poles.
  • foundation piles 40 are arranged in bottom 30 through guide sleeves (2a, 2b, 2c, 2d) of positioning frame 1 in the position of use.
  • FIG 8 A possible embodiment is shown in figure 8 . It is noted that in the shown embodiment positioning frame 1 is situated in front of spud pole 13b of platform 10, therefore separately of platform 10, and has thus been lowered independently of the spud poles onto bottom 30, has particularly been positioned by one of the other above described methods, preferably by means of a positioning frame 1 provided with thrusters. As shown, a pile lining tube 41 can be picked up by lifting crane 18 and placed in moon pool 16b of the platform above the desired position 33 of the first pile. Should position 33 be located adjacently of the platform, this step is then not necessary.
  • a pile 40 is picked up by lifting crane 18 from a storage rack 42 located on platform 10 and lowered until the underside of pile 40 is situated at the level 43, this level being close to the level of the bottom (see figure 10 ).
  • pile 40 Once pile 40 has been correctly aligned with guide sleeve 2c, the pile is lowered further until it is partially received in tube 2c. The pile is then carried further under its own weight into the underwater bottom 30, during which process the pile is guided through guide sleeve 2c as shown in figure 10 . As shown in figure 12 , pile 40 is then driven into bottom 30 until the top of pile 40 has penetrated further into guide sleeve 2c than the portion provided with support ribs. Pile 40 can be driven into bottom 30 by means of a pneumatic hammer 44 as shown in figure 12 , although there are other embodiments which can be equally suitable or even more suitable.
  • FIG 13 an embodiment is shown in which the arranging of piles 40 in bottom 30 is performed by drilling the foundation piles 40, and/or shafts in which the foundation piles 40 are arranged, into the underwater bottom 30 by means of drilling means.
  • platform 10 is provided with a crane 18 to which is attached a drill string 68 of the bottom hole assembly type.
  • Drill string 68 is lowered by lifting crane 18 into a guide sleeve or casing 69 which has been placed in bottom 30 by an oscillator 691.
  • This method is particularly suitable for harder bottoms 30 consisting for instance of a rock-bed 301 with a layer 302 of weathered rock thereabove.
  • Guide casing 69 is preferably arranged as far as the rock-bed 301.
  • another embodiment comprises drilling means 70 with an underwater part suspended by means of a lifting plate 75 from suspension means in the form of a cable 71.
  • drilling means 70 can be carried underwater until they come into contact with the guide sleeves, such as guide sleeve 2b, and can be connected thereto.
  • the control of drill head 73 and the like takes place with control means 76 which are situated above water and comprise, among other parts, a power source 76a, a compressor 76b and pumps (not shown) for developing hydraulic pressure, in addition to electronics (not shown).
  • the control means are located on a floating device, for instance pontoon 77.
  • Drilling means 70 are electrically connected to control means 76 by means of electric cables 78. Material drilled out of the underwater bottom 30 by drill head 73 can be discharged via a discharge conduit 79 to which a discharge pipe or hose (not shown) is connected if desired.
  • Drilling means 70 comprise a drill string 162 arranged in a guide sleeve 2.
  • Guide sleeve 2 supports at its underside 21 on underwater bottom 30, whereby a substantially water-impermeable seal can be obtained.
  • Guide sleeve 2 is sufficiently large to provide space for drill string 162.
  • Drill string 162 comprises a number of drill pipes 162a mutually connected by means of flanges. The hollow drill pipes 162a together form a central cavity 86.
  • Drill string 162 is provided on the underside with a drill head 73 with cutting tools 88, for instance in the form of cutting discs.
  • drill string 162 is preferably provided with a number of stabilizers 89 which are arranged distributed in axial direction and which support against the inner wall of guide sleeve 2.
  • stabilizers 89 which are arranged distributed in axial direction and which support against the inner wall of guide sleeve 2.
  • the shown preferred variant also comprises means for injecting air under pressure into the hollow drill string 162 at the position of drill head 73.
  • These means comprise feed lines 84 which are arranged on drill string 162 and which are connected at the one outer end to compressor 76 and which debouch at the other outer end into cavity 86 of drill string 162 via air inlet valves 83.
  • Air supplied under pressure through lines 84 enters flow 90 via air inlet valves 83 and thus supports the flow 90.
  • Drilling means 70 can be further provided with one or more nozzles (not shown) for injecting a fluid, preferably water, under pressure into underwater bottom 30 at the position of drill head 73.
  • Drill string 162 and/or guide sleeve 2 and/or drill head 73 are provided for this purpose with conduits (not shown) for feeding the fluid to the nozzles.
  • the nozzles are preferably mounted on drill head 73 and suitable for emitting water under a first pressure of at least 200 bar, more preferably at least 350 bar, still more preferably at least 500 bar and most preferably at least 650 bar.
  • positioning frame 1 can optionally be removed. If desired, the position of piles 40 and/or the vertical position of the top of each of the piles 40 can be checked prior to removal of positioning frame 1 by optical means suitable for the purpose, such as cameras, for the purpose of checking and inspecting the whole operation.
  • a jacket 150 of a wind turbine 151 can be placed on the foundation realized as described above. This can take place for instance by arranging legs 152 of jacket 150 in or around piles 40 and anchoring the legs 152 to piles 40 by means of grouting.
  • the method and positioning frame according to the invention allow a pile foundation to be provided in efficient manner wherein it is not necessary to displace the platform regularly for each pile, whereby much time is gained compared to the known method.
  • the invented method is less dependent on weather conditions and requires in principle no extensive inspection operations underwater, for instance by robots and/or divers.

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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)
  • Earth Drilling (AREA)
  • Foundations (AREA)

Claims (12)

  1. Procédé de fourniture d'une fondation pour une masse située en hauteur, comprenant une enveloppe (150) d'une éolienne (151) ou d'une jetée, dans lequel la fondation comprend un certain nombre de pieux (40) agencés dans un fond en un motif géométrique, le procédé comprenant :
    - la fourniture d'un dispositif flottant (60) muni de moyens de levage (18) ;
    - la fourniture d'un cadre de positionnement (1) comprenant un certain nombre de manchons de guidage (2a, 2b, 2c, 2d) raccordés mutuellement agencés en un motif géométrique dans le but de recevoir les pieux ;
    - l'abaissement du cadre de positionnement (1) sur le fond (30) dans une position d'utilisation via les moyens de levage ; et
    - l'agencement des pieux (40) dans le fond à travers les manchons de guidage (2a, 2b, 2c, 2d) du cadre de positionnement (1) dans la position d'utilisation, le procédé comprenant en outre
    - le positionnement et/ou l'orientation du cadre de positionnement (1) à la position d'utilisation au moyen de moyens de positionnement (62, 66, 67) qui effectuent une translation du cadre de positionnement (1) par rapport à la surface de fond dans un plan horizontal s'étendant plus ou moins parallèlement à la surface de fond.
  2. Procédé selon la revendication 1, dans lequel la précision de positionnement du cadre de positionnement (1) par rapport au fond (30) se trouve dans des variations dans le plan horizontal d'un maximum de 10 cm.
  3. Procédé selon la revendication 1, dans lequel le cadre de positionnement (1) est positionné et/ou orienté par engagement du cadre avec un véhicule robotisé actionné à distance (ROV) (62).
  4. Procédé selon la revendication 1 ou 2 ou 3, dans lequel le cadre de positionnement est positionné et/ou orienté par engagement du cadre avec des câbles de traction (66) munis d'ancrages (65).
  5. Procédé selon l'une quelconque des revendications 1 à 4, dans lequel le cadre de positionnement est positionné et/ou orienté par fourniture au cadre d'un ensemble de propulseurs (67) manœuvrables.
  6. Procédé selon l'une quelconque des revendications précédentes, comprenant l'établissement de la position d'au moins un pieu (40) et le positionnement du cadre de positionnement (1) de sorte qu'au moins l'un des manchons de guidage (2a, 2b, 2c, 2d) du cadre de positionnement soit aligné avec la position du pieu.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel la surface interne des manchons de guidage (2a, 2b, 2c, 2d) est munie le long d'au moins une portion de la longueur des manchons de guidage de nervures de support (22a, 22b, 22c, 22d) pour les pieux, et les pieux sont transportés à travers les manchons de guidage jusqu'à ce que le sommet des pieux s'étende plus loin que le côté de dessous de ladite portion munie de nervures de support de la longueur des manchons de guidage.
  8. Procédé selon la revendication 7, dans lequel les pieux sont transportés plus loin que ladite portion, par exemple par la rallonge d'un marteau pneumatique (44).
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'agencement des pieux dans le fond est réalisé par entraînement des pieux (40) dans le fond par l'action de dispositifs de marteau hydraulique, de dispositifs de marteau vibrant et/ou d'oscillateurs.
  10. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'agencement des pieux dans le fond est réalisé par l'installation par forage des pieux de fondation, et/ou d'arbres (80) dans lesquels sont agencés les pieux de fondation, dans le fond sous-marin au moyen de moyens de forage (70).
  11. Procédé selon l'une quelconque des revendications précédentes, comprenant l'étape consistant à retirer le cadre de positionnement (1) une fois les pieux (40) agencés dans le fond.
  12. Procédé d'installation d'une fondation d'une masse située en hauteur, comprenant une enveloppe (150) d'une éolienne (151) ou d'une jetée, dans lequel la fondation comprend un certain nombre de pieux agencés dans un fond au moyen du procédé selon l'une quelconque des revendications 1 à 10, le procédé comprenant l'agencement de jambes (152) de la masse située en hauteur à l'intérieur ou autour des pieux (40) et l'ancrage des jambes (152) aux pieux (40) au moyen d'un coulis.
EP12175860.1A 2011-07-11 2012-07-11 Procédé permettant de fournir une fondation pour une masse située en hauteur Active EP2546418B1 (fr)

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BE2011/0445A BE1020071A5 (nl) 2011-07-11 2011-07-11 Werkwijze voor het verschaffen van een fundering voor een zich op hoogte bevindende massa, en een positioneerframe voor het uitvoeren van de werkwijze.

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BE (1) BE1020071A5 (fr)
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JP6814627B2 (ja) * 2016-12-22 2021-01-20 鹿島建設株式会社 放水路の施工方法、水中における曲部付管体の支持構造
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CN110593337A (zh) * 2019-10-14 2019-12-20 中铁第四勘察设计院集团有限公司 一种适用于深水嵌入式基础的水下铣槽导向定位装置
US20210340716A1 (en) * 2020-04-29 2021-11-04 Dylan Swenson Alignment device and methods
CN111560973B (zh) * 2020-05-28 2021-09-28 扬州市江都永坚有限公司 一种水下桩基多桩施工系统
CN111809615A (zh) * 2020-08-17 2020-10-23 上海两港市政工程有限公司 重型桩机荷载托换结构及其施工方法
CN112112186B (zh) * 2020-09-27 2022-02-22 上海振华重工(集团)股份有限公司 一种海上换流站上分体式导管架基础的安装方法
CN113152459B (zh) * 2021-02-06 2022-02-18 浙江水利水电学院 一种生态河道地基加固用钢护筒的施工方法
KR102443891B1 (ko) * 2021-10-18 2022-09-16 (주)대한엔지니어링 해저면의 모노파일 관입용 지그 어셈블리 및 이것을 이용한 모노파일 관입 방법
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PL2546418T3 (pl) 2020-12-14
US20130183101A1 (en) 2013-07-18
AU2012204091A1 (en) 2013-01-31
EP2546418A1 (fr) 2013-01-16
LT2546418T (lt) 2020-09-10
BE1020071A5 (nl) 2013-04-02
DK2546418T3 (da) 2020-08-10
AU2012204091B2 (en) 2015-10-29

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