EP1750994B1 - Systeme d'ancrage pour construction flottante - Google Patents

Systeme d'ancrage pour construction flottante Download PDF

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Publication number
EP1750994B1
EP1750994B1 EP05742398A EP05742398A EP1750994B1 EP 1750994 B1 EP1750994 B1 EP 1750994B1 EP 05742398 A EP05742398 A EP 05742398A EP 05742398 A EP05742398 A EP 05742398A EP 1750994 B1 EP1750994 B1 EP 1750994B1
Authority
EP
European Patent Office
Prior art keywords
elongated
anchoring
elements
mass
anchoring system
Prior art date
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Active
Application number
EP05742398A
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German (de)
English (en)
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EP1750994A1 (fr
Inventor
Johannes Wilhelmus Jacobus Mikx
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.)
GustoMSC BV
Original Assignee
Marine Structure Consultants MSC BV
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Publication date
Application filed by Marine Structure Consultants MSC BV filed Critical Marine Structure Consultants MSC BV
Publication of EP1750994A1 publication Critical patent/EP1750994A1/fr
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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 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers

Definitions

  • An anchoring system can be made to be so strong and stiff that movement of the floating construction is largely prevented, yet anchoring systems are often designed such that movement of the floating construction is allowed and the average environmental forces can be absorbed.
  • Such an anchoring system which is sufficiently strong to absorb environmental forces and sufficiently flexible to allow movements, provides a connection between the floating construction and the sea bottom.
  • the attachment to the bottom under the floating construction can be realized with the aid of an anchoring element, such as for instance a heavy object, a classic anchor, a driven-in pile or a suction anchor, while the connection between the anchoring element and the floating construction is often realized by means of elongated elements, such as for instance ropes, chains, steel cables or plastic cables.
  • the elongated carrying and auxiliary elements will assume an inclined position rotated relative to one another, so that, as a result of the mutual coupling, via the elongated anchoring elements, a mass suspended from an elongated carrying element is pulled upwards and thus a resetting moment is provided which undoes the rotation when the cause causing the rotation is removed or drops.
  • the force vector generated by the weight of the mass or the combined masses runs through the center of gravity of the floating construction.
  • an attachment point of an elongated element is in the proximity of an attachment point of the mass.
  • a mass needs to be suspended at such a height above the sea bottom that, even with the expected maximum vertical displacements, it will not contact the sea bottom, in order to thus prevent impact loads in the system.
  • Figs. 1 and 2 show a floating construction in the form of a pontoon 1 which is kept in place by means of an anchoring system.
  • the anchoring system is provided with a mass 3 suspended from a carrying element 2 centrally under the pontoon 1, which mass 3 is kept in place by three anchoring elements 4, which are, as Fig. 2 shows, arranged in a rotationally symmetrical manner around the mass 3 and are, on the one side, connected with the carrying element 2 directly above the mass 3 and are, on the other side, fixed in a bottom under water by means of an anchor 5.
  • three auxiliary elements 6 extend, which are each connected with one of the anchoring elements 4 at a point between the mass 3 and an anchor 5.
  • the pontoon 1 Upon dropping of the force which attempts to push away the pontoon 1 to the right, initiated by the weight of the mass 3 and supported by the interplay of forces in the various elements 2, 4 and 6, the pontoon 1 will return to its force-neutral position of equilibrium, i.e. to the position shown in Fig. 1 .
  • the anchoring system can have a stiffer design by in each case mutually connecting two connection points of the auxiliary elements 6 with the anchoring elements 4 with an elongated supporting element 7, as shown by dashed lines in Fig. 2 . Then, two surfaces connected by the auxiliary elements 6 are created, as it were, which are rotated relative to one another upon rotation of the pontoon 1.
  • this anchoring system is essentially the same as the one described with reference to Figs. 1 and 2 .
  • mass will be pulled upwards and elongated elements will be put under more stress.
  • the platform 11 Upon dropping of the force causing the displacement or rotation, the platform 11 will again be returned to its force-neutral starting position in the manner as discussed hereinabove.
  • the carrying element 12b will not only also be auxiliary element for the mass 13a suspended from carrying element 12a, but also auxiliary element for the mass 13c suspended from carrying element 12c.
  • each carrying element also acts twice as an auxiliary element.
  • the anchoring elements and the supporting elements then they are all found to have a dual function.
  • the supporting element 17c forms, together with the anchoring element 18c1, an anchoring element for the mass 13a and with the anchoring element 18a2 an anchoring element for the mass 13c, while the anchoring element 18c1 in itself also forms an anchoring element for the mass 13c and the anchoring element 18a2 can in itself also be considered as an anchoring element for the mass 13a.
  • a pontoon 21 which is provided with projecting arms 21a to which carrying elements 22 are attached from which masses 23 are suspended.
  • the carrying elements 22 are mutually connected by supporting elements 27, while, to an connection point between a carrying element 22 and a supporting element 27, in each case the ends of two anchoring elements 28 connect, whose other ends are in each case locked by an anchor 25 with respect to a bottom under water.
  • the construction and operation of this anchoring system are essentially the same of those of the anchoring system according to Figs. 3 and 4 , albeit use is now made of four masses.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Claims (10)

  1. Système d'ancrage pour construction flottante (1) et pourvu d'éléments allongés (2), avec lesquels une masse (3) est suspendue à la construction flottante et la construction flottante est connectée avec des éléments d'ancrage (5) prévus sur ou dans un fond sous-marin, caractérisé en ce que la masse (3) est suspendue à la construction flottante au moyen d'un élément porteur allongé (2) de longueur fixe, lequel élément porteur allongé est en outre pourvu de points de fixation pour au moins deux éléments d'ancrage allongés (4), où au moins un élément allongé s'étend, au moins dans ladite position de démarrage, substantiellement horizontalement d'un point de fixation à un point de connexion avec un autre élément auxiliaire allongé (6), qui s'étend, au moins dans ladite position de démarrage, substantiellement verticalement vers le bas entre un point de fixation sur la construction flottante et le point de connexion avec ledit élément d'ancrage allongé (4), qui s'étend vers le bas avec une inclinaison du point de connexion à un élément d'ancrage (5) prévu sur ou dans un fond sous-marin.
  2. Système d'ancrage selon la revendication 1, caractérisé en ce que au moins deux éléments d'ancrage allongés s'étendent, au moins dans ladite position de démarrage, substantiellement horizontalement d'un point de fixation à un point de connexion avec dans chaque cas un autre élément auxiliaire allongé et s'étendent vers le bas avec une inclinaison du point de connexion respectif à dans chaque cas un élément d'ancrage prévu sur ou dans le fond sous-marin.
  3. Système d'ancrage selon la revendication 1 ou 2, caractérisé en ce que au moins un élément auxiliaire allongé porte une masse à la manière d'un élément porteur allongé.
  4. Système d'ancrage selon l'une quelconque des revendications précédentes, caractérisé en ce que au moins trois éléments porteurs allongés sont présents, dans lequel dans chaque cas au moins deux éléments porteurs allongés agissent comme éléments auxiliaires allongés pour un autre élément porteur allongé.
  5. Système d'ancrage selon la revendication 4, caractérisé en ce que trois éléments porteurs allongés sont présents, qui sont dans chaque cas connectés deux par deux par un élément allongé de longueur égale.
  6. Système d'ancrage selon la revendication 1 ou 2, caractérisé en ce que un élément porteur allongé et trois éléments auxiliaires allongés sont présents, dans lequel l'élément porteur allongé est dans chaque cas connecté par un élément allongé de longueur égale avec un point de connexion d'un élément auxiliaire allongé.
  7. Système d'ancrage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un point de fixation d'un élément allongé est au voisinage d'un point de fixation de la masse.
  8. Système d'ancrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le vecteur de force généré par le poids de la masse ou des masses combinées passe sensiblement par le centre de gravité de la construction flottante.
  9. Système d'ancrage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une partie d'un élément d'ancrage allongé orienté vers le bas avec une inclinaison depuis un point de fixation ou de connexion dans chaque cas continue de façon divisée, par exemple en V, jusqu'à chaque élément d'ancrage.
  10. Système d'ancrage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un point de fixation ou de connexion est connecté avec un autre point de fixation ou de connexion au moyen d'un élément de support allongé.
EP05742398A 2004-05-06 2005-05-03 Systeme d'ancrage pour construction flottante Active EP1750994B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1026131A NL1026131C2 (nl) 2004-05-06 2004-05-06 Ankersysteem voor een drijvende constructie.
PCT/NL2005/000336 WO2005108199A1 (fr) 2004-05-06 2005-05-03 Systeme d'ancrage pour construction flottante

Publications (2)

Publication Number Publication Date
EP1750994A1 EP1750994A1 (fr) 2007-02-14
EP1750994B1 true EP1750994B1 (fr) 2010-07-07

Family

ID=34969293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05742398A Active EP1750994B1 (fr) 2004-05-06 2005-05-03 Systeme d'ancrage pour construction flottante

Country Status (7)

Country Link
EP (1) EP1750994B1 (fr)
DE (1) DE602005022186D1 (fr)
DK (1) DK1750994T3 (fr)
ES (1) ES2348523T3 (fr)
NL (1) NL1026131C2 (fr)
PT (1) PT1750994E (fr)
WO (1) WO2005108199A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2907419B1 (fr) * 2006-10-20 2009-01-09 Nenuphar Sarl Reseau de flotteurs,notamment destine pour d'eoliennes et/ou d'hydroliennes sur des sites marins de profondeur importante.
DK201000268A (da) * 2010-03-31 2010-03-31 Uggen Per Vindmøller monteret på deplacerende fundament
IT1399506B1 (it) * 2010-04-21 2013-04-19 Auto Nautica Service S R L Struttura di ancoraggio di opere galleggianti, in particolare moli e/o pontili galleggianti
BR112013011146B1 (pt) 2010-11-04 2021-01-12 University Of Maine System Board Of Trustees plataforma de turbina de vento semissubmersível capaz de flutuar em um corpo de água e suportar uma turbina de vento
JP6949690B2 (ja) * 2017-12-04 2021-10-13 日鉄エンジニアリング株式会社 浮体係留方法および浮体
JP6983640B2 (ja) * 2017-12-04 2021-12-17 三菱造船株式会社 浮体、浮体係留装置および浮体係留方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1491564A (fr) * 1966-07-01 1967-08-11 Dispositif de mouillage ou d'amarrage avec rappel en position
US3425069A (en) * 1967-12-01 1969-02-04 Us Army Mooring buoy
US5107784A (en) * 1991-02-19 1992-04-28 Lacy Franklin R Docking system for boats

Also Published As

Publication number Publication date
ES2348523T3 (es) 2010-12-07
NL1026131C2 (nl) 2005-11-08
WO2005108199A1 (fr) 2005-11-17
EP1750994A1 (fr) 2007-02-14
DE602005022186D1 (de) 2010-08-19
DK1750994T3 (da) 2010-11-01
PT1750994E (pt) 2010-09-29

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