WO2011160671A1 - Assembly and method for dismantling a vessel - Google Patents

Assembly and method for dismantling a vessel Download PDF

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Publication number
WO2011160671A1
WO2011160671A1 PCT/EP2010/058725 EP2010058725W WO2011160671A1 WO 2011160671 A1 WO2011160671 A1 WO 2011160671A1 EP 2010058725 W EP2010058725 W EP 2010058725W WO 2011160671 A1 WO2011160671 A1 WO 2011160671A1
Authority
WO
WIPO (PCT)
Prior art keywords
pontoon
dock
vessel
quay
water level
Prior art date
Application number
PCT/EP2010/058725
Other languages
French (fr)
Inventor
Robert Ruinard
Adrianus Henricus Nicolaas Van Den Broek
Original Assignee
A. Van Den Broek Holding
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 A. Van Den Broek Holding filed Critical A. Van Den Broek Holding
Priority to PCT/EP2010/058725 priority Critical patent/WO2011160671A1/en
Publication of WO2011160671A1 publication Critical patent/WO2011160671A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C1/00—Dry-docking of vessels or flying-boats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B71/00—Designing vessels; Predicting their performance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B85/00—Dismantling or scrapping vessels

Definitions

  • the invention relates to the field of dismantling vessels.
  • a common procedure for dismantling a vessel at the end of its economic lifespan encompasses sailing the vessel onto a beach ("beaching") and taking it apart into smaller pieces. This procedure is mostly applied in Asia, such as in India or Bangladesh. Sailing the vessel to such a location, however, brings about high cost and the dismantling process on the beach occurs under unpredictable conditions, causing great risks for the workers and severe environmental prob ⁇ lems due to the uncontrolled disposal of hazardous waste products .
  • Another known procedure for dismantling a vessel comprises mooring the vessel at a quay and dismantling it piece by piece using cranes. This, however, requires specialised cranes and a heavy foundation thereof, whereas further a high risk exists on pollution of the water surrounding the vessel by waste material.
  • the international patent application WO2007/081198 describes an assembly and method for dismantling a vessel, according to which the vessel is supported by a floating pontoon in a dock and wherein the vessel is dismantled while resting on top of the floating pontoon and dismantled pieces of the vessel are pulled onto a neighbouring quay.
  • This assembly and method require means for controlling the vertical position of the floating pontoon for compensating the change (decrease) in weight of the vessel when the dismantling process proceeds.
  • an assembly for use during dismantling a vessel comprising a dock having a first dock part with a bottom at a depth below the water level in the dock and at least one second dock part with a bottom at a lesser depth below said water level, a quay bordering each second dock part having an upper horizontal quay surface po- sitioried above the water level and a pontoon of which the vertical position relative to the water level can be controlled, wherein the pontoon is provided with an upper sup ⁇ porting surface for supporting the vessel to be dismantled and wherein the depth of the at least one second dock part and the dimensions of the pontoon are such that when the pontoon rests upon the bottom of the second dock part its upper supporting surface is substantially flush with the up ⁇ per horizontal quay surface.
  • the cooperation between the pontoon and the bottom of the second dock part defines a stable and stationary po ⁇ sition of the pontoon, such that the vessel can be moved safely towards and onto the upper horizontal quay surface from the upper supporting surface of the dock.
  • the pontoon remains in contact with the bottom of the second dock part, for example by lowering its buoyancy sufficiently to ensure that, the pontoon remains seated on said bottom, also when the vessel has been removed entirely from the pontoon.
  • the dock comprises two second dock parts at opposite sides of the first, dock part.
  • a first vessel has been positioned on top of the quay bordering a first one of said second dock parts
  • a next vessel may be positioned on top of the quay borderincj the other of said second dock parts using the same pontoon.
  • the two second dock parts have bottoms at equal depths below the water level.
  • the two second dock parts may have bottoms at different depths below the water level, thus op ⁇ timising the different second dock parts for vessels with different draught .
  • the dock is provided with at. least one ciosable water tight door and means for controlling the water level within the dock when the door is closed.
  • the assembly also may be used at loca ⁇ tions with large variations of the water level between high tide and low tide,
  • the upper supporting surface of the pontoon is provided with vessel supporting means capable of displacing the vessel in a direction towards the upper horizontal quay surface.
  • vessel supporting means capable of displacing the vessel in a direction towards the upper horizontal quay surface.
  • the upper horizontal quay surface is provided with vessel supporting means capable of receiving a vessel arriving from the upper supporting surface of the pontoon. Such means also promote such a displacement of the vessel between the pontoon and the quay ,
  • the pontoon has a controllable buoyancy as a result of which the vertical position of the pontoon may be controlled; for example it is possible to decrease the buoyancy in such an amount that the pontoon remains seated onto the bottom of the second dock part also when the vessel is removed entirely from the pontoon.
  • driving means for controlling its horizontal position such as, for example, thrusters, winches or alike.
  • a method for dismantling a vessel comprising the steps of sailing the vessel into a first dock part of a dock, having said first dock part with a bottom at a depth below the wa- ter level in the dock and at least one second dock part with a bottom at a lesser depth below said water level, position ⁇ ing a pontoon of which the vertical position relative to the water level can be controlled, below the vessel and lifting the vessel by the pontoon which is provided with an upper supporting surface for supporting the vessel to be dismantled, sailing the pontoon with vessel supported thereon into said second dock part until the pontoon is positioned along a quay bordering the at least one second dock part having an upper horizontal quay surface positioned above the water level, lowering the pontoon until it rests upon the bottom of the second dock part, wherein the depth of the at.
  • At least one second dock part and the dimensions of the pontoon are such that when the pontoon rests upon the bottom of the second dock part its upper supporting surface is substantially flush with the. upper horizontal quay surface, and moving the vessel from the upper supporting surface of the pontoon onto the upper horizontal quay surface and dismantling the vessel .
  • the method according to the present invention al ⁇ lows to position the vessel in a safe and stable manner on top of the quay without the use of heavy cranes and without the need for complicated control means for keeping the upper supporting surface of the pontoon flush with the upper horizontal quay surface.
  • Lowering the pontoon onto the bottom of the second dock part may be achieved by decreasing the buoyancy of the pontoon and/or lowering the water level in the dock,
  • lowering the pontoon onto the bottom of the second dock part is achieved by decreasing the buoyancy of the pontoon such that the pontoon remains seated on said bottom when the vessel is completely removed from the pontoon.
  • the stabilising cooperation between the bottom of the second dock part and the pontoon exclusively results .from the weight of the pontoon with or without the additional weight of the vessel.
  • the dock comprises two second dock parts at opposite sides of the first dock part, wherein after posi ⁇ tioning a vessel on one of the quays bordering one second dock part a further vessel in a corresponding manner is positioned on the quay bordering the other second dock part.
  • two vessels may be dismantled substantially simultaneously.
  • sailing the pontoon with vessel supported thereon may occur by activating pontoon driving means such as, for example, thrusters, winches or alike.
  • pontoon driving means such as, for example, thrusters, winches or alike.
  • moving the vessel from the upper supporting surface of the dock onto the upper horizontal quay surface may occur by vessel supporting means provided on the upper supporting surface of the pontoon and capable of displacing the vessel in a direction towards the upper horizontal quay surface and/or vessel supporting means provided on the upper horizontal quay surface and capable of receiving a vessel arriving from the upper supporting surface of the pontoon.
  • Figure 1 illustrates in a number of consecutive steps a first assembly and method according to the present invention
  • Figure 2 illustrates in a number of consecutive steps a second assembly and method, according to the present invention
  • Figure 3 schematically shows a top plan view of an assembly according to the invention
  • Figure 4 schematically shows possible details of : a pontoon
  • Figure. 5 schematically shows a section through a dock of an assembly according to the present invention
  • FIG. 1 an assembly for use during dismantling a vessel is illustrated during different stages of a dismantling process.
  • the assembly comprises a dock 1 having a first dock part la with a bottom 2 at a depth below the water level 3 in the dock and a second dock part lb with a bottom 4 at a lesser depth below said water level 3.
  • a quay 5 borders the second dock part lb and has an upper horizontal quay surface 6 positioned above the water level 3,
  • the assembly further comprises a pontoon 7 of which the vertical position relative to the water level 3 can be controlled.
  • the pontoon is provided with an upper supporting surface 8 for supporting a vessel 9 (first shown in figure lc) to be dismantled.
  • the depth of the second dock part lb (position of bottom 4 ) and the dimensions of the pontoon 7 are such that when the pontoon 7 rests upon the bottom 4 of the second dock part lb its upper supporting surface 8 is substantially flush with the upper horizontal quay surface 6 (best illustrated in figures lg-li) .
  • the assembly shown in figure 1 will be used to perform a method for dismantling a vessel .
  • the pontoon 7 is lowered (figure lb) and the vessel 8 is sailed into the first dock part la of the dock.
  • the pontoon is positioned below the vessel 9 ⁇ figure lc) , next moved upwards and positioned against the keel of the vessel 9 (figure Id) and. finally lifted together with the vessel sufficiently to a position higher than the bottom 4 of the second dock part lb (figure le) .
  • the pontoon 7 is illustrated seated on the bottom 2 of the first dock part la, it also may float in such a situation above said bottom 2.
  • the upper supporting surface 8 of the pontoon 7 becomes operative by engaging the keel of the vessel.
  • a next step comprises sailing the pontoon 7 with vessel 9 supported thereon into the second dock part lb un ⁇ til the pontoon 7 is positioned along the quay 5 bordering the second dock part (figure If ⁇ . Then lowering the pontoon 7 is accomplished until it rests ⁇ and will remain rested when the vessel is removed from the pontoon) on the bottom 4 of the second dock part lb (figure Ig) .
  • the depth of the second dock part lb and the dimensions of the pontoon 7 are such that when the pontoon 7 rests upon the bottom 4 of the second dock part lb its upper supporting surface 8 is substantially flush with the upper horizontal quay surface 6, and moving the vessel 9 from the upper supporting surface 8 of the pontoon 7 onto the upper horizontal quay surface 6 may be accomplished (figure Ih) after which the vessel 9 reaches its final destination on top of the upper horizontal quay surface 6 (fig- ure li)and dismantling of the vessel 9 may commence.
  • Figure 2 shows an alternative embodiment of the assembly, in which the dock comprises two second dock parts lb and lc at opposite sides of the first dock part la.
  • the two second dock parts lb and lc have bottoms 4 at equal depths below the water level 3, but it may be possible that the two second dock parts lb and lc have bottoms at different depths below the water level (as illustrated schemati ⁇ cally by dotted bottom 4 ' in figure 2a) .
  • the method for using the assembly according to figure 2 starts with a succession of steps which are equiva- lent to the steps of the method performed by the assembly according to figure 1.
  • the steps illustrated in figures 2a-2i correspond with the steps illustrated in figures la- li, as a result of which a first vessel 9 f is positioned on top of a first upper horizontal quay surface 6' bordering second dock part, lb (see figure 2i) .
  • the pontoon 7 is lifted from the bottom 4 of the respective second dock part lb (figure 21) and moved to its starting position again (figure 2k).
  • figure 2 shows the possibility of dismantling two vessels 9' and 9" (substantially) simultaneously.
  • the first dock part la is provided with at least one closable water tight door 10 and means 11 (e.g. water inlets and water outlets in combination with pumps) for controlling the water level within the dock when the door 10 is closed.
  • means 11 e.g. water inlets and water outlets in combination with pumps
  • Figure 4 which schematically illustrates a frontal elevational view of a pontoon 7, shows that the upper supporting surface 8 of the pontoon is provided with vessel supporting means 12 capable of displacing the vessel in a direction towards the upper horizontal quay surface 6.
  • the upper horizontal quay surface 6 may be provided with vessel supporting means 13 capable of receiving a vessel arriving from the upper supporting surface 8 of the pontoon 7, as illustrated in figure 5 which is a cross section through an assembly (pontoon not shown) .
  • the pontoon 7 has a controllable buoyancy achieved by active buoyancy tanks 14 (provided with means for supplying or venting air, not illustrated) . Further the pontoon is shown being provided with driving means for controlling its horizontal position, such as, for example, thrusters 15 or winches 16 positioned sta- tionary (e.g. on land) and attached to the pontoon by cables 17 or alike.
  • driving means for controlling its horizontal position such as, for example, thrusters 15 or winches 16 positioned sta- tionary (e.g. on land) and attached to the pontoon by cables 17 or alike.
  • the vessels After reaching their final destination on the quays, the vessels will be dismantled using dedicated equip- ment (among which cranes) and the resulting pieces of the vessels may be transported (over land or over water) to other locations.

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

Abstract

An assembly is provided tor use during dismantling a vessel, comprising a dock (1) having a first dock part (10) with a bottom (2) at a depth below the water level in the dock and at least one second dock part (lb) with a bottom (4) at a lesser depth below said water level, a quay (5) bordering each second dock part having an upper horizontal quay surface (6) positioned above the water level and a pontoon (7) of which the vertical position relative to the water level can be controlled. The pontoon (7) is provided with an upper supporting surface (8) for supporting the vessel to be dismantled and the depth of the at least one second dock part (1b) and the dimensions of the pontoon are such that when the pontoon rests upon the bottom of the second dock part its upper supporting surface is substantially flush with the upper horizontal quay surface. A method for dismantling a vessel is provided as well.

Description

Assembly and method for dismantling a vessel
The invention relates to the field of dismantling vessels. A common procedure for dismantling a vessel at the end of its economic lifespan encompasses sailing the vessel onto a beach ("beaching") and taking it apart into smaller pieces. This procedure is mostly applied in Asia, such as in India or Bangladesh. Sailing the vessel to such a location, however, brings about high cost and the dismantling process on the beach occurs under unpredictable conditions, causing great risks for the workers and severe environmental prob¬ lems due to the uncontrolled disposal of hazardous waste products .
Another known procedure for dismantling a vessel comprises mooring the vessel at a quay and dismantling it piece by piece using cranes. This, however, requires specialised cranes and a heavy foundation thereof, whereas further a high risk exists on pollution of the water surrounding the vessel by waste material.
The international patent application WO2007/081198 describes an assembly and method for dismantling a vessel, according to which the vessel is supported by a floating pontoon in a dock and wherein the vessel is dismantled while resting on top of the floating pontoon and dismantled pieces of the vessel are pulled onto a neighbouring quay. This assembly and method require means for controlling the vertical position of the floating pontoon for compensating the change (decrease) in weight of the vessel when the dismantling process proceeds.
It is an object of the present invention to provide means for improving a procedure for dismantling a vessel ,
Thus, in accordance with a first aspect of the present invention, an assembly for use during dismantling a vessel is provided, comprising a dock having a first dock part with a bottom at a depth below the water level in the dock and at least one second dock part with a bottom at a lesser depth below said water level, a quay bordering each second dock part having an upper horizontal quay surface po- sitioried above the water level and a pontoon of which the vertical position relative to the water level can be controlled, wherein the pontoon is provided with an upper sup¬ porting surface for supporting the vessel to be dismantled and wherein the depth of the at least one second dock part and the dimensions of the pontoon are such that when the pontoon rests upon the bottom of the second dock part its upper supporting surface is substantially flush with the up¬ per horizontal quay surface.
The cooperation between the pontoon and the bottom of the second dock part defines a stable and stationary po¬ sition of the pontoon, such that the vessel can be moved safely towards and onto the upper horizontal quay surface from the upper supporting surface of the dock., During this stage of the process the pontoon remains in contact with the bottom of the second dock part, for example by lowering its buoyancy sufficiently to ensure that, the pontoon remains seated on said bottom, also when the vessel has been removed entirely from the pontoon. Once arrived on top of the quay, the final dismantling of the vessel may start.
In a special embodiment of the assembly according to the present invention the dock comprises two second dock parts at opposite sides of the first, dock part. When a first vessel has been positioned on top of the quay bordering a first one of said second dock parts, a next vessel may be positioned on top of the quay borderincj the other of said second dock parts using the same pontoon. Thus it is possible to dismantle two vessels substantially simultaneously,
It is possible then that the two second dock parts have bottoms at equal depths below the water level. As an alternative, however, the two second dock parts may have bottoms at different depths below the water level, thus op¬ timising the different second dock parts for vessels with different draught .
In yet another embodiment of the assembly accord- ing to the present invention the dock is provided with at. least one ciosable water tight door and means for controlling the water level within the dock when the door is closed. As a result the assembly also may be used at loca¬ tions with large variations of the water level between high tide and low tide,
Preferably, the upper supporting surface of the pontoon is provided with vessel supporting means capable of displacing the vessel in a direction towards the upper horizontal quay surface. As a result displacing the vessel to- wards the quay is promoted in a favourable manner.
Additionally it is possible that the upper horizontal quay surface is provided with vessel supporting means capable of receiving a vessel arriving from the upper supporting surface of the pontoon. Such means also promote such a displacement of the vessel between the pontoon and the quay ,
Preferably the pontoon has a controllable buoyancy as a result of which the vertical position of the pontoon may be controlled; for example it is possible to decrease the buoyancy in such an amount that the pontoon remains seated onto the bottom of the second dock part also when the vessel is removed entirely from the pontoon.
For controlling the movement (and especially the horizontal movement) of the pontoon it is possible to pro- vide it with driving means for controlling its horizontal position, such as, for example, thrusters, winches or alike.
In a second aspect of the invention a method for dismantling a vessel is provided, comprising the steps of sailing the vessel into a first dock part of a dock, having said first dock part with a bottom at a depth below the wa- ter level in the dock and at least one second dock part with a bottom at a lesser depth below said water level, position¬ ing a pontoon of which the vertical position relative to the water level can be controlled, below the vessel and lifting the vessel by the pontoon which is provided with an upper supporting surface for supporting the vessel to be dismantled, sailing the pontoon with vessel supported thereon into said second dock part until the pontoon is positioned along a quay bordering the at least one second dock part having an upper horizontal quay surface positioned above the water level, lowering the pontoon until it rests upon the bottom of the second dock part, wherein the depth of the at. least one second dock part and the dimensions of the pontoon are such that when the pontoon rests upon the bottom of the second dock part its upper supporting surface is substantially flush with the. upper horizontal quay surface, and moving the vessel from the upper supporting surface of the pontoon onto the upper horizontal quay surface and dismantling the vessel .
The method according to the present invention al¬ lows to position the vessel in a safe and stable manner on top of the quay without the use of heavy cranes and without the need for complicated control means for keeping the upper supporting surface of the pontoon flush with the upper horizontal quay surface.
Lowering the pontoon onto the bottom of the second dock part may be achieved by decreasing the buoyancy of the pontoon and/or lowering the water level in the dock,
However, in a preferred embodiment of the method according to the present invention, lowering the pontoon onto the bottom of the second dock part is achieved by decreasing the buoyancy of the pontoon such that the pontoon remains seated on said bottom when the vessel is completely removed from the pontoon. Thus, the stabilising cooperation between the bottom of the second dock part and the pontoon exclusively results .from the weight of the pontoon with or without the additional weight of the vessel.
In an special embodiment of the method according to the invention the dock comprises two second dock parts at opposite sides of the first dock part, wherein after posi¬ tioning a vessel on one of the quays bordering one second dock part a further vessel in a corresponding manner is positioned on the quay bordering the other second dock part. Thus two vessels may be dismantled substantially simultaneously.
In one embodiment sailing the pontoon with vessel supported thereon may occur by activating pontoon driving means such as, for example, thrusters, winches or alike.
In yet another embodiment of the method according to the present invention, moving the vessel from the upper supporting surface of the dock onto the upper horizontal quay surface may occur by vessel supporting means provided on the upper supporting surface of the pontoon and capable of displacing the vessel in a direction towards the upper horizontal quay surface and/or vessel supporting means provided on the upper horizontal quay surface and capable of receiving a vessel arriving from the upper supporting surface of the pontoon.
Hereinafter the invention will be elucidated while referring to the drawings, in which:
Figure 1 illustrates in a number of consecutive steps a first assembly and method according to the present invention;
Figure 2 illustrates in a number of consecutive steps a second assembly and method, according to the present invention ;
Figure 3 schematically shows a top plan view of an assembly according to the invention;
Figure 4 schematically shows possible details of :a pontoon, and Figure. 5 schematically shows a section through a dock of an assembly according to the present invention,
Firstly referring to figure 1 an assembly for use during dismantling a vessel is illustrated during different stages of a dismantling process. The assembly comprises a dock 1 having a first dock part la with a bottom 2 at a depth below the water level 3 in the dock and a second dock part lb with a bottom 4 at a lesser depth below said water level 3. A quay 5 borders the second dock part lb and has an upper horizontal quay surface 6 positioned above the water level 3,
The assembly further comprises a pontoon 7 of which the vertical position relative to the water level 3 can be controlled. The pontoon is provided with an upper supporting surface 8 for supporting a vessel 9 (first shown in figure lc) to be dismantled. The depth of the second dock part lb (position of bottom 4 ) and the dimensions of the pontoon 7 are such that when the pontoon 7 rests upon the bottom 4 of the second dock part lb its upper supporting surface 8 is substantially flush with the upper horizontal quay surface 6 (best illustrated in figures lg-li) .
The assembly shown in figure 1 will be used to perform a method for dismantling a vessel . The pontoon 7 is lowered (figure lb) and the vessel 8 is sailed into the first dock part la of the dock. As a result the pontoon is positioned below the vessel 9 {figure lc) , next moved upwards and positioned against the keel of the vessel 9 (figure Id) and. finally lifted together with the vessel sufficiently to a position higher than the bottom 4 of the second dock part lb (figure le) .
Although in figure lc the pontoon 7 is illustrated seated on the bottom 2 of the first dock part la, it also may float in such a situation above said bottom 2. During lifting the vessel 9 the upper supporting surface 8 of the pontoon 7 becomes operative by engaging the keel of the vessel.
A next step comprises sailing the pontoon 7 with vessel 9 supported thereon into the second dock part lb un¬ til the pontoon 7 is positioned along the quay 5 bordering the second dock part (figure If}. Then lowering the pontoon 7 is accomplished until it rests {and will remain rested when the vessel is removed from the pontoon) on the bottom 4 of the second dock part lb (figure Ig) . As is clearly visible in figures Ig-li, the depth of the second dock part lb and the dimensions of the pontoon 7 are such that when the pontoon 7 rests upon the bottom 4 of the second dock part lb its upper supporting surface 8 is substantially flush with the upper horizontal quay surface 6, and moving the vessel 9 from the upper supporting surface 8 of the pontoon 7 onto the upper horizontal quay surface 6 may be accomplished (figure Ih) after which the vessel 9 reaches its final destination on top of the upper horizontal quay surface 6 (fig- ure li)and dismantling of the vessel 9 may commence.
Figure 2 shows an alternative embodiment of the assembly, in which the dock comprises two second dock parts lb and lc at opposite sides of the first dock part la. The two second dock parts lb and lc have bottoms 4 at equal depths below the water level 3, but it may be possible that the two second dock parts lb and lc have bottoms at different depths below the water level (as illustrated schemati¬ cally by dotted bottom 4 ' in figure 2a) .
The method for using the assembly according to figure 2 starts with a succession of steps which are equiva- lent to the steps of the method performed by the assembly according to figure 1. Thus the steps illustrated in figures 2a-2i correspond with the steps illustrated in figures la- li, as a result of which a first vessel 9f is positioned on top of a first upper horizontal quay surface 6' bordering second dock part, lb (see figure 2i) .
Next, the pontoon 7 is lifted from the bottom 4 of the respective second dock part lb (figure 21) and moved to its starting position again (figure 2k).
The steps illustrated in figures 21-2s also corre¬ spond with the steps of figures 2a-2i, but relate to the po¬ sitioning of a second vessel 9" on top of a second upper horizontal quay surface 6" bordering second dock part lc (shown in figure 2s) and, where applicable, are mirror images of the corresponding ones of the figures 2b-2i .
Thus,, figure 2 shows the possibility of dismantling two vessels 9' and 9" (substantially) simultaneously.
In the scheraatical top plan view of an assembly according to figure 3 the first dock part la is provided with at least one closable water tight door 10 and means 11 (e.g. water inlets and water outlets in combination with pumps) for controlling the water level within the dock when the door 10 is closed.
Figure 4, which schematically illustrates a frontal elevational view of a pontoon 7, shows that the upper supporting surface 8 of the pontoon is provided with vessel supporting means 12 capable of displacing the vessel in a direction towards the upper horizontal quay surface 6. Like- wise, the upper horizontal quay surface 6 may be provided with vessel supporting means 13 capable of receiving a vessel arriving from the upper supporting surface 8 of the pontoon 7, as illustrated in figure 5 which is a cross section through an assembly (pontoon not shown) .
Returning to figure 4, the pontoon 7 has a controllable buoyancy achieved by active buoyancy tanks 14 (provided with means for supplying or venting air, not illustrated) . Further the pontoon is shown being provided with driving means for controlling its horizontal position, such as, for example, thrusters 15 or winches 16 positioned sta- tionary (e.g. on land) and attached to the pontoon by cables 17 or alike.
After reaching their final destination on the quays, the vessels will be dismantled using dedicated equip- ment (among which cranes) and the resulting pieces of the vessels may be transported (over land or over water) to other locations.
The invention is not limited to the embodiments described before, which may be varied widely within the scope of the invention as defined by the appending claims.

Claims

CLAXMS
1. Assembly for use during dismantling a vessel, comprising a dock having a first dock part with a bottom at a depth below the water level in the dock and at least one second dock part with a bottom at a lesser depth below said water level , a quay bordering each second dock part having an upper horizontal quay surface positioned above the water level and a pontoon of which the vertical position relative to the water level can be controlled, wherein the pontoon is provided with an upper supporting surface for supporting the vessel to be dismantled and wherein the depth of the at least one second dock part and the dimensions of the pontoon are such that when the pontoon rests upon the bottom of the second dock part its upper supporting surface is substantially flush with the upper horizontal quay surface,
2. Assembly according to claim 1, wherein the dock comprises two second dock parts at. opposite sides of the first dock part.
3. Assembly according to claim 2, wherein the two second dock parts have bottoms at equal depths below the wa- ter level.
4. Assembly according to claim 2, wherein the two second dock parts have bottoms at different depths below the water level.
5. Assembly according to any of the previous claims., wherein the dock is provided with at least one clos- able water tight door and means for controlling the water level within the dock when the door is closed.
6. Assembly according to any of the previous claims, wherein the upper supporting surface of the pontoon is provided with vessel supporting means capable of displac¬ ing the vessel in a direction towards the upper horizontal quay surface.
7. Assembly according to any of the previous claims, wherein the upper horizontal quay surface is pro¬ vided with vessel supporting means capable of receiving a vessel arriving from the upper supporting surface of the
5 pontoon.
8. Assembly according to any of the previous claims, wherein the pontoon has a controllable buoyancy,
9. Assembly according to any of the previous claims, wherein the pontoon is provided with driving means 10 for controlling its horizontal position, such as, for example, thrusters, winches or alike,
10. Method for dismantling a vessel, comprising the steps of sailing the vessel into a first dock part of a dock having said first dock part with a bottom at a depth 15 below the water level in the dock and at least one second dock part with a bottom at a lesser depth below said water level, positioning a pontoon of which the vertical position relative to the water level can be controlled, below the vessel and lifting the vessel by the pontoon which is pro- vided with an upper supporting surface for supporting the vessel to be dismantled, sailing the pontoon with vessel supported thereon into said second dock part until the pontoon is positioned along a quay bordering the at least one second dock part having an upper horizontal quay surface po- sitioned above the water level, lowering the pontoon until it rests upon the bottom of the second dock part, wherein the depth of the at least one second dock part and the dimensions of the pontoon are such that when the pontoon rests upon the bottom of the second dock part its upper supporting surface is substantially flush with the upper horizontal quay surface, and moving the vessel from the upper supporting surface of the pontoon onto the upper horizontal quay surface and dismantling the vessel.
11. Method according claim 10, wherein lowering the pontoon onto the bottom of the second dock part, is achieved, by decreasing the buoyancy of the pontoon and/or lowering the water level in the dock.
12. Method according claim 11, wherein lowering the pontoon onto the bottom of the second dock part is achieved by decreasing the buoyancy of the pontoon such that the pontoon remains seated on said, bottom when the vessel is completely removed from the pontoon,
13. Method according to any of the claims 10-12, wherein the dock comprises two second dock parts at opposite sides of the first dock part and. wherein after positioning a vessel on one of the quays bordering a second dock part a further vessel in a corresponding manner is positioned on the quay bordering the other second dock part .
14. Method according to any of the claims 10-13, wherein sailing the pontoon with vessel supported thereon occurs by activating pontoon driving means such as, for example, thrusters, winches or alike.
15. Method according to any of the claims 10-14, wherein moving the vessel from the upper supporting surface of the dock onto the upper horizontal quay surface occurs by vessel supporting means provided on the upper supporting surface of the pontoon and capable of displacing the vessel in a direction towards the upper horizontal quay surface and/or vessel supporting means provided on the upper hori- zontal quay surface and capable of receiving a vessel arriv¬ ing from the upper supporting surface of the pontoon.
PCT/EP2010/058725 2010-06-21 2010-06-21 Assembly and method for dismantling a vessel WO2011160671A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332248A (en) * 1964-01-29 1967-07-25 Arden L Burnett Turntable drydock
JPS5959593A (en) * 1982-09-29 1984-04-05 Mitsui Eng & Shipbuild Co Ltd Construction equipment for ship
WO1988007896A1 (en) * 1986-02-24 1988-10-20 John Didea Disposal and recycling of scrap metal from sea and other vessels
WO2007081198A1 (en) * 2006-01-10 2007-07-19 Van Der Stoel, Jan Marius Pontoon, dock and method for a dock
CN101380992A (en) * 2007-09-07 2009-03-11 江南造船(集团)有限责任公司 Launching and landing method of ships and special buoyancy device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332248A (en) * 1964-01-29 1967-07-25 Arden L Burnett Turntable drydock
JPS5959593A (en) * 1982-09-29 1984-04-05 Mitsui Eng & Shipbuild Co Ltd Construction equipment for ship
WO1988007896A1 (en) * 1986-02-24 1988-10-20 John Didea Disposal and recycling of scrap metal from sea and other vessels
WO2007081198A1 (en) * 2006-01-10 2007-07-19 Van Der Stoel, Jan Marius Pontoon, dock and method for a dock
CN101380992A (en) * 2007-09-07 2009-03-11 江南造船(集团)有限责任公司 Launching and landing method of ships and special buoyancy device

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