EP2952631A1 - Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs - Google Patents

Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs Download PDF

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Publication number
EP2952631A1
EP2952631A1 EP15177584.8A EP15177584A EP2952631A1 EP 2952631 A1 EP2952631 A1 EP 2952631A1 EP 15177584 A EP15177584 A EP 15177584A EP 2952631 A1 EP2952631 A1 EP 2952631A1
Authority
EP
European Patent Office
Prior art keywords
sea vessel
seabed
pontoon
legs
base plate
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Withdrawn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
EP15177584.8A
Other languages
German (de)
English (en)
Inventor
Diego Lazzarin
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.)
Saipem SpA
Original Assignee
Saipem SpA
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 Saipem SpA filed Critical Saipem SpA
Publication of EP2952631A1 publication Critical patent/EP2952631A1/fr
Withdrawn legal-status Critical Current

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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
    • E02B17/02—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
    • E02B17/021—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 with relative movement between supporting construction and platform
    • 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
    • E02B17/021—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 with relative movement between supporting construction and platform
    • E02B17/024—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 with relative movement between supporting construction and platform shock absorbing means for the supporting construction
    • 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
    • E02B2017/0039—Methods for placing the offshore structure
    • E02B2017/0043—Placing the offshore structure on a pre-installed foundation structure
    • 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
    • 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
    • E02B2017/0082—Spudcans, skirts or extended feet

Definitions

  • the present invention relates to a sea vessel for laying bulkheads gates in a seabed.
  • the present invention relates to a sea vessel for laying bulkheads gates in a seabed and configured for resting stably on a base plate positioned on a bed, preferably a seabed, under safety conditions.
  • a solution currently adopted for lifting, transporting and installing voluminous and heavy offshore end-products consists of a self-propelled pontoon on which moving means are positioned (lifting/lowering) of the end-product. These means are preferably positioned symmetrically on the emerging surface of the hull of the pontoon.
  • the latter also comprises a series of constraining means to the seabed consisting of a plurality of moveable legs in a vertical direction, peripherically arranged, which are lowered and rest against the seabed to stabilize the pontoon and lift it above sea level in order to actuate the positioning phases of the end-product transported, without being substantially influenced by weather-sea conditions.
  • a self-propelled pontoon suitable for moving large-dimensional steel bulkhead is that which will be used for the MOSE project which has been proposed for regulating the tide flows in the lagoon of the city of Venice.
  • This is a modular C-shaped pontoon whose side concavity allows the bulkhead - removed from onshore shipyards and brought in correspondence with the inlet mouths of the lagoon (Malamocco, Chioggia, Lido San Nicol ⁇ and Lido-Treporti) where they will be installed to form four barriers, hinged on base plates, each of which consisting of about 20 bulkhead - to be lifted, housed for transportation and lowered.
  • the pontoon has at least four retractable legs, symmetric with respect to the hull, which are lowered until they rest on the bottom of the lagoon to allow the hull to be raised above sea level at the moment in which the bulkhead must be lowered into the water and installed.
  • the pontoon which is transporting the bulkhead, arrives in position, it lowers the four legs to rest on a concrete base already situated on the bed of the lagoon, lifts the hull and then lowers the bulkhead.
  • This operation has various difficulties due to the fact that in the positioning phase of the pontoon and lowering of the legs, the hull is subjected to the weather- sea conditions which, among other things, also cause rolling, pitching and yawing movements which limit, or even prevent, the positioning and constraining operations to the seabed, to be correctly effected. Due to these movements of the hull, in fact, there is the risk that the retractable legs can collide strongly against the concrete base, becoming damaged, or preventing an accurate positioning of the legs themselves.
  • the yawing can be regulated by a precise management of the self-propelling means, nothing can be done for the rolling and pitching.
  • An object of the present consists in providing a sea vessel which overcomes the drawback of the prior art.
  • a sea vessel for laying bulkheads gates in a seabed comprising a pontoon (2); and a number of legs (4) movable in ascending/descending direction with respect to the pontoon (2), wherein each leg comprises:
  • the leg comprises a structural element forms the holding part of the leg of the sea vessel and consists of a reticular structure or a hollow cylindrical structure or in the form of a parallelepiped with a square or rectangular structure. It can be made of stainless steel or corrosion-resistant metal alloy and can be lowered or lifted by means of rack systems or with hydraulic systems of "jacking" type.
  • the shock-absorption and centering device is characterized by the presence of elastic means which respectively connect the telescopic means and the centering pin to the structural element and support foot respectively.
  • Said elastic means are produced by means of jacks or oil-dynamic pistons connected to accumulators or by means of mechanical springs or rubber elements for guaranteeing malleability.
  • the telescopic means and centering pin are both coaxial with the structural element and essentially consist of structures made of steel or metal alloy.
  • the sea vessel (1) is the pontoon (2) prepared for the laying of bulkhead gates for the MOSE project and consists of a plurality of modular means assembled and arranged in C-form, so that the cavity (3) allows the metallic bulkhead gates to be housed, during their transferal, and lowered or recovered, in the case of their installation or removal for maintenance.
  • the pontoon has vertical legs (4) moveable in a descending/ascending direction which, in the navigation phase, are lifted as illustrated in Figure 1 .
  • the legs are positioned along the perimeter of the hull and symmetrically,to guarantee the equilibrium and balancing of the hull when it is in a resting condition on the seabed or on the base plate and in complete emersion ( Figure 2 ).
  • the pontoon is stabilized,by lowering one or more sonar references to the seabed, then, by managing the propulsion means (6), it is positioned so that the projection of the legs onto the seabed substantially coincides with the corresponding centering recesses (7) of the legs, arranged on the concrete base (8), prepared for housing and supporting the bulkhead gates (9), in the drawing already in an operative position.
  • the legs (4) are lowered towards the recesses by means of a specific system (Jack-in System)(10).
  • the legs of the pontoon can only be moved in a vertical direction, downwards or upwards, remaining constrained to the pontoon with respect to the other movements. This means that, in the case of a rough sea and consequently strong pitching and rolling of the hull of the pontoon, the legs (4) are subjected to an oscillating movement (in various oscillation planes) substantially centered on the corresponding recess.
  • the resting system comprises the telescopic element (11), constrained to the leg (4) by means of an elastic system (12), for example a hydraulic piston with an accumulator or a gas spring, fixed internally to the leg by means of cardan joints (13), the support foot (18) comprising the semi-spherical joint (14) and the centering pin (15) constrained by means of a spring (16) to the semispherical joint.
  • an elastic system (12) for example a hydraulic piston with an accumulator or a gas spring, fixed internally to the leg by means of cardan joints (13), the support foot (18) comprising the semi-spherical joint (14) and the centering pin (15) constrained by means of a spring (16) to the semispherical joint.
  • the resting of the support foot on the surface of the base plate can be further achieved with a support disk (17) connected to the semi-spherical joint by means of a negligible mass connection elastic element, produced, for example, with rubber elements in order to have limited impact forces.
  • the telescopic element is lowered until it touches the base plate.
  • the possible collision is absorbed by the damping system (12).
  • the flat surface (17) of the foot rests on the surface of the base plate (8), thanks to the semi-spherical joint.
  • the flat surface of the foot slides on the base plate around the recess until the centering pin (15) enters the recess (7).
  • the pin itself guides the oscillating movement towards the vertex of the recess allowing the foot to be put into position.
  • the recess and tip of the pin have a V-shaped vertical section, to guarantee a seat for the pin towards the centre of the recess.
  • the resting system is progressively tightened to activate the lifting phase of the pontoon.
  • the legs (4) are re-lowered, which, after touching the surface of the base plate, allow the thrust to be applied for lifting the hull of the pontoon above the sea level.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP15177584.8A 2009-03-13 2010-03-05 Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs Withdrawn EP2952631A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2009A000383A IT1393139B1 (it) 2009-03-13 2009-03-13 Dispositivo di appoggio su fondale per mezzi navali auto-sollevanti
EP10155620.7A EP2228490B1 (fr) 2009-03-13 2010-03-05 Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP10155620.7A Division EP2228490B1 (fr) 2009-03-13 2010-03-05 Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs

Publications (1)

Publication Number Publication Date
EP2952631A1 true EP2952631A1 (fr) 2015-12-09

Family

ID=41226146

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10155620.7A Not-in-force EP2228490B1 (fr) 2009-03-13 2010-03-05 Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs
EP15177584.8A Withdrawn EP2952631A1 (fr) 2009-03-13 2010-03-05 Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP10155620.7A Not-in-force EP2228490B1 (fr) 2009-03-13 2010-03-05 Dispositif pour l'assise sur le fond de la mer de vaisseaux maritimes auto-élévateurs

Country Status (2)

Country Link
EP (2) EP2228490B1 (fr)
IT (1) IT1393139B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102926984B (zh) * 2012-11-08 2015-08-19 北京化工大学 一种浮动式往复压缩机故障模拟实验台
CN104631395B (zh) * 2015-01-16 2016-08-24 长春工程学院 一种水工钢闸门防撞结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600761A (en) * 1948-12-06 1952-06-17 Erle P Halliburton Offshore drilling means
US3138932A (en) * 1961-04-14 1964-06-30 Richfield Oil Corp Locating an offshore drilling platform
JPS6475707A (en) * 1987-09-16 1989-03-22 Shimizu Construction Co Ltd Spud-type marine structure
US4968181A (en) * 1989-04-07 1990-11-06 Goldman Jerome L Shock absorber and method for offshore jack-up rigs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4195950A (en) * 1978-08-17 1980-04-01 Goldman Jerome L Shock absorbing structure and method for off shore jack-up rigs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600761A (en) * 1948-12-06 1952-06-17 Erle P Halliburton Offshore drilling means
US3138932A (en) * 1961-04-14 1964-06-30 Richfield Oil Corp Locating an offshore drilling platform
JPS6475707A (en) * 1987-09-16 1989-03-22 Shimizu Construction Co Ltd Spud-type marine structure
US4968181A (en) * 1989-04-07 1990-11-06 Goldman Jerome L Shock absorber and method for offshore jack-up rigs

Also Published As

Publication number Publication date
EP2228490B1 (fr) 2015-07-22
EP2228490A1 (fr) 2010-09-15
IT1393139B1 (it) 2012-04-11
ITMI20090383A1 (it) 2010-09-14

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