EP2452021A1 - Baggerschiffsystem - Google Patents
BaggerschiffsystemInfo
- Publication number
- EP2452021A1 EP2452021A1 EP10730449A EP10730449A EP2452021A1 EP 2452021 A1 EP2452021 A1 EP 2452021A1 EP 10730449 A EP10730449 A EP 10730449A EP 10730449 A EP10730449 A EP 10730449A EP 2452021 A1 EP2452021 A1 EP 2452021A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction hose
- flexible suction
- vessel
- materials
- dredging head
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/28—Barges or lighters
- B63B35/30—Barges or lighters self-discharging
- B63B35/303—Barges or lighters self-discharging discharging by suction, pressing or washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8833—Floating installations
- E02F3/885—Floating installations self propelled, e.g. ship
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9243—Passive suction heads with no mechanical cutting means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F7/00—Equipment for conveying or separating excavated material
- E02F7/02—Conveying equipment mounted on a dredger
- E02F7/023—Conveying equipment mounted on a dredger mounted on a floating dredger
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/06—Floating substructures as supports
- E02F9/067—Floating substructures as supports with arrangements for heave compensation
Definitions
- the invention refers to a floating dredge vessel dedicated to a floating dredge vessel dedicated to recover materials from seabed and discharge said recovered materials outboard, into a barge.
- an inert rigid dredging head connected to a first end of the flexible suction hose and having a first free end opened downward for sucking from below, when rested on the seabed,
- - hoisting means disposed on said deck and provided with hanging ropes, adapted to be wound and unwound, and connected to both the rigid dredging head and a hanging rope length controller, for:
- At least one delivering tube which is: * connected through a first end to the flexible suction hose, and
- said delivering tube and delivering head being adapted to move relative to said deck, for being :
- the invention intends to speed up the recovery of the dredged materials, all the more when the vessel has to dredge on an open sea, far away from any harbour where the dredged materials can be delivered ashore .
- the hoisting means are adapted for: * towing the immersed flexible suction hose and rigid dredging head when the dredge vessel is moving frontward and materials are being sucked,
- a suction hose length controller is provided for controlling the length of the flexible suction hose unrolled from said reel
- a main length controller connected to both the flexible suction hose length controller and the hanging rope length controller is provided for adjusting according to one of the other the unrolled length of the flexible suction hose and an unwound length of the hanging ropes, in such a way that the flexible suction hose, which has a determined length between the rigid dredging head and the sea surface, when the dredge vessel is moving forward and said materials are being sucked, is curved along said determined length, whatever the tilt of the rigid dredging head.
- connection between the delivering tube and the flexible suction hose is adapted for having all the sucked mixture, including sucked water, discharged outside the dredge vessel, into said barge, through said delivering head, with neither pit nor hopper for storing recovered materials on the dredging vessel.
- a dredging method (including partly designing or implanting vessel components and manoeuvring it in sailing) intending to strive for solving at least some of the above drawbacks for recovering immersed materials from a seabed concession and discharging them, the method comprising:
- the step of sucking comprises sucking said mixture while :
- the flexible suction hose which has a variable immersed length, has said immersed length adapted so that the flexible suction hose is curved therealong, whatever the tilt of the dredging head,
- the step of delivering comprises delivering said materials, while said mixture is sucked.
- the curvature of the towed flexible suction hose be varied contingent to said unwound length of the hanging ropes, and/or
- the step of adapting the immersed length of the flexible suction hose comprises adjusting such a length, so that, while the rigid dredging head is resting on the seabed and sucking operates, the flexible suction hose is longitudinally loosened.
- an assembly comprising:
- said barge floating alongside said dredge vessel, said barge comprising a loading compartment having a predetermined volume, said loading compartment being opened upwardly and charged with said mixture, water included, the upward opening allowing water to overflow from the loading compartment when said recovered materials charged therein are above a quantity which is contingent to said predetermined volume.
- figure 1 shows a preferred embodiment of a dredging vessel, viewed from above, together with a symbolic illustration of a barge adapted to be loaded with the dredged mixture.
- FIG. 2 shows said dredging vessel viewed from one lateral side (arrow II),
- FIG. 3 shows some elements of the dredging vessel (barge essentially) viewed from above
- figure 4 shows an example of transhipment between the dredging vessel and the barge
- figure 5 is the same view as figure 2, at a reduced scale
- figure 7 is a view from above of figure 6, together with a barge.
- FIG. 1 is illustrated the best mode of a floating dredge vessel 1 dedicated to extract materials 3 from water 3a and discharge said materials outboard to have them transported to a determined destination.
- Materials means sand, gravel, sediments and any other substance which can be sucked from the seabed.
- Seabed means the bottom of the ocean (or sea or any water surface) .
- the vessel 1 has a structure 100 comprising a hull Ia covered by a (rear) deck 10 on which is elevated a frontward bridge deck 12.
- a rotative reel 5 on which a elongated flexible suction hose 7 is adapted to be rolled, hoisting means 9 for immersing elevating and towing said suction hose, a rigid dredging head 11 disposed at a first end 7a of the flexible suction hose 7, for dredging the materials 3, pumping means 13 connected to the suction hose, for sucking therethrough a mixture of materials and water, a discharging unit 15 having a series of delivering heads 15b adapted for discharging the sucked mixture (materials and water) outside the dredge vessel, and a delivering pipe unit 17 disposed, on said dredge vessel, between the suction hose 7 and the discharging unit 15, for delivering the sucked mixture from the suction hose to the discharging unit.
- the rigid dredging head 11 is an elongated structure having a longitudinal axis lie. Said structure 11 is inert, what means it is not a (underwater) vehicle (such as vehicle 32 disclosed in FR-A-2919015) .
- This rigid dredging head 11 has a first free end 11a opened downward for sucking from below, when rested on the seabed 30.
- the reel 5 is rotative around a horizontal axis. From said reel the suction hose 7 can be unrolled under water to discharge upwardly the materials, and even all the mixture (water + materials to be recovered) , when the pump 13 is operative.
- the suction hose 7 is preferably a tube made of flexible elastic material, possibly mechanically reinforced.
- the dredging can be operated especially in open sea and the hose 7 is woundable around the reel 5, the length of said hose is higher than the length of the vessel .
- the dredge vessel For towing the dredging head 11 underwater, from a zone of the vessel located forwardly (FW) with respect to the hoisting means 9 (located at a rearward location on the deck 10), the dredge vessel further comprises towing means 21.
- Figure 2 shows that the towing means 21/21a will advantageously extend between a front part 10' a of the hull Ia and the dredging head 11.
- First lateral side 100a can be starboard or portside.
- the axis 5a of the reel 5 around which it rotates for rolling said flexible suction hose will preferably be substantially parallel to a roll axis Ia of the vessel.
- the towing means preferably comprise a cable 21a having a variable length between the vessel (hull Ia) and the dredging head 11, for an underwater steering of the dredging head while said vessel is sailing.
- a role, or drum, 22a is coupled with motor (winch) means 22b for allowing the length of the towing means to be adapted as a function of the water depth, referenced L on figure 2. If, as advised and illustrated, the assembly 7/11 is hoistable along the lateral side 100a of the hull, drum 22a will preferably be disposed close to said lateral side 10a/100a, frontward. Motor means 22b will preferably be operated from the bridge deck 12 located close to the prow.
- a location of the drum 22a on a fore-deck 100 disposed at a higher level than the lower rear deck 10 will be advantageous: Should any problem occur, it would be faster and safer to intervene, all the more since adapting the length of the towing means can be dramatically important.
- Fore-deck 100 is located close to the bridge deck 12 and frontward therefrom.
- the delivering pipe unit 17 provided on the deck 10 advantageously comprises rigid pipes 17a fixedly attached to the dredge vessel deck, over it, for transferring the sucked mixture from the flexible hose 7 to the discharging unit 15.
- the discharging unit 15 preferably comprises a rigid tube 15a connected at a first end 170a to the delivering pipe unit 17 and, at a second end 151b, to the delivering head 15b.
- said delivering head 15b extends transversally to the tube 15a and is adapted to be placed outside the dredge vessel.
- discharging tubes 15a and delivering heads 15b are transverse and said heads extend parallel to the longitudinal axis of both the vessel and the adjacent barge (see figure 1) so that a corresponding elongated passage is offered for the materials .
- a series of parallel discharging tubes/heads 15a/15b will be provided along the second lateral side 100b of the hull Ia (see also figure 4) .
- the hoisting means 9 provided with cables 26 and preferably connected to the dredging head 11 are disposed on lateral side 10a of the deck 10.
- Cables 26 define hanging ropes adapted to be wound and unwound, and connected to both the rigid dredging head 11 and a hanging rope length controller 110.
- Such a hanging rope length controller 110 will preferably comprise winches which the hanging ropes 26 will be connected to, together with sensors and/or other length measurement devices, connected to a computer unit.
- the hoisting means 9 are adapted for:
- the vessel is further provided with a suction hose length controller 120, for controlling the length of the flexible suction hose unrolled from reel 5.
- Such a controller is very similar to the hanging rope length controller 110, since both are adapted to control, and if necessary adjust, the length of a structure which can be rolled/unrolled or wound/unwound. As a consequence, means identical to the above-cited ones can be used.
- the vessel is also provided onboard with a main length controller 130 connected to both the flexible suction hose length controller 120 and the hanging rope length controller 110.
- the main length controller 130 is a supervisor controller provided for adjusting, according to one of the other, the unrolled length of the flexible suction hose 7 and the unwound length of (at least one of) the hanging ropes 26, in such a way that the flexible suction hose is curved along length Ll, whatever the tilt A of the rigid dredging head (see figures 1, 6, 8), when (precisely while) the dredge vessel is moving forward (FW) and said materials (presently all the mixture) are being sucked through hose 7.
- Ll is the hose length, along its axis 11a, between the rigid dredging head (connection 7a) and the sea surface 300, at the location 7b where said hose 7 enters water (see figures 5, 6, 8) .
- L2 rectilinear length between the rigid dredging head and the sea surface 300
- Ll rectilinear length between the rigid dredging head and the sea surface 300
- the unwound lengths of cables 26a, 26b are less than Ll, when sucking operates.
- the curvature can change contingent to the forward speed of the vessel and the resistance of water.
- the remaining length rolled around the reel 5 and/or the remaining length wound around at least one of said hanging ropes 26 could be used instead of the respective unrolled and unwound lengths.
- This main length controller 130 comprises a computer connected to both the above-cited computers of the flexible suction hose length controller 120 and the hanging rope length controller
- the reference (zero) can be the respective lengths unwound when the dredging head 11 is on the deck 10 (see figure 1, full line) .
- a measurement device 140 disposed on board is adapted to measure or calculate the water depth between the sea surface 300 and the seabed 30, or a distance, such as the vertical distance D (figure 8) between the seabed (in front of the dredging head, forward) and the vessel.
- a sensor 150 can be used, such as a "sonar”.
- measurement device 140 is preferably connected to respective length controllers 110, 120, 130 (at least connection to supervisor length controller 130) .
- the respective controllers 110, 120, 130 operate individually or commonly to adjust the corresponding length under control.
- Such a solution prevents the flexible solution hose 7 and the suction operation to be affected if the seabed level is modified and/or the waves are too high. It will be understood that the cited unrolled/rolled and unwound/wound lengths will each be measured or calculated with reference to a predetermined reference length.
- the discharging unit 15 is adapted to move, notably rotate, in the figures, relative to said dredge vessel, for having its discharging head:
- each of said axis is parallel to axis Ia.
- the axis of rotation of the discharging unit 15 are referenced 23a, 23b in figure 3.
- said discharging unit be adapted to rotate relative to the dredge vessel deck about a first and a second horizontal axis, respectively 23a, 23b, for rotating between said stored and deployed positions, and for an up and down movement of its/each delivering head 15b.
- the discharging unit can move up an down around horizontal axis.
- Such a solution is efficient for limiting the space reserved for said discharging unit, on the deck. Especially, it allows the discharging unit to preferably be stored in an upright position, in the non-operative state (see figures 1, 3 dark continuous lines) .
- Each tube 15a will advantageously comprise at least a first and a second elongated (tube) portions, respectively 153a, 153b, articulated at an intermediate zone of the tube, around the horizontal axis 23b. Further, the first elongated portion 153a will preferably be articulated at a lower end 155 where it is connected to the deck 10 (horizontal axis 23a, figure 1) .
- first and second elongated portions 153a, 153b are folded substantially vertically, with axis 23b upward and backward, and discharging head 15b downward (and backward too)
- the so-called first and second elongated portions are deployed (unfolded) frontward (more or less horizontally) , with horizontal axis 23a backward and discharging head 15b frontward, above the barge 27, which is a motorized barge ; preferentially a tug boat or a self propelled barge.
- the pumping means 13 comprises a dredge pump 13a disposed near the dredging head 11, so that said dredge pump is immersed when the dredging head is dredging the materials (see figure 2) .
- the dredge vessel 1 will preferably be provided with one or more inboard propulsion motor means 25 controlled from the bridge deck 12, for moving the vessel.
- said inboard propulsion motor means will advantageously be adapted for positioning the dredge vessel while the materials 3 are dredged from the dredging zone 30 (such as the sea bottom) and the mixture sucked. Consequently, the dredge vessel will be free of any riverbed attaching means, seabed attaching means, riverbed anchoring means and seabed anchoring means (such as traditional anchors) which are adapted for temporary maintaining a dredge vessel when materials are dredged and mixture sucked.
- a floating barge 27 is adapted to be disposed alongside the dredge vessel 1 (see figure 1, too) .
- such a barge 27 will be situated along said second lateral side 100b of the hull, in front of (below) the discharging unit 15 extended to its deployed operative position .
- Said floating barge 27 is a floating unit which is adapted to both transport and carry the materials. It has a hull 26, a deck level 28 and a loading compartment 29 above which the discharging unit head 15b can be disposed, outside the dredge vessel, for discharging the sucked mixture in said loading compartment.
- the loading compartment 29 is open upwardly.
- unit 27 be a motorised barge. Said barge will be propelled by a tug boat, or a self propelled barge. Notably for sake of security with transhipment of the sucked mixture from vessel 1 to unit 27 when swells and/or waves are high, such a solution will allow the assembly of said vessel and unit to sail substantially side by side (side 100a of vessel 1) . It is possible to not use mooring means for removably attaching together the dredge vessel and the floating barge, when said mixture is to be discharged from the dredge vessel to unit 27.
- a follow-me positioning system could control the respective alongside positions of the dredge vessel and the floating barge, one with respect to the other .
- Said rudders and a tiller located within the gangway globally defines steering means adapted to allow the vessel 1 to be steered.
- an electronic positioning system 33 could be installed on the vessel 1, for dynamically controlling the respective alongside positions of said vessel and the floating barge 27, one with respect to the other, when the above-cited mixture is to be discharged from the vessel to unit 27.
- the positioning system 33 and motor means 25 would then be connected together.
- unit 27 will also be provided with a coordinated electronic positioning means 34 wireless connected to the positioning system 33 an adapted to control motor 272 and rudder 274.
- mooring means and/or fendering means can be used between vessel 1 and barge 27.
- the discharging unit head 15b will be located in the so-called deployed zone DZ (figure 1) and will advantageously have its horizontal and/or vertical position (s) adapted as a function of the degree of sediment loading of unit 27 together with the respective alongside positions of the vessel 1 and the floating barge 27, one with respect to the other.
- the loading compartment 29 opens upwardly on the deck level 28 and be adapted to freely communicate with outside, so that water of the discharged sucked mixture will progressively overflow outboard as said mixture is progressively charged in the loading compartment 29.
- the floating barge 27 will even be free of any cover means adapted for covering loading compartment 29 (see figure 4) .
- the floating barge 27 could be a split-barge adapted to be loaded from an open top and discharged through the bottom of its hull (see zone 32 figure 4 where movable flaps can be disposed in the bottom of compartment 29, as a part of the hull) . From the above description, it is clear that using a barge 27 having an upwardly opened loading compartment
- connection between the (each) delivering tube 15a and the flexible suction hose 7 will preferably be adapted for having all the sucked mixture, including sucked water, discharged outside the dredge vessel, into the barge 27, through the delivering head(s) 15b, with neither pit nor hopper nor compartment (such as compartment 29), for storing on the dredging vessel the recovered materials 3 sucked through said hose.
- the hoisting means 9 will comprise front and rear hoists 9a, 9b provided with respective front and rear hanging ropes 26a, 26b,
- the angle B is substantially a right angle, whereas it is a slanted angle on figure 6, for allowing hose 7 coming from above and the rear (BW) to connect the rigid dredging head 11.
- both the front and rear hanging ropes 26a, 26b are attached to the rigid dredging head 11, 13, for adjusting said tilt A.
- this method comprises :
- the flexible suction hose has its immersed length adapted so that the flexible suction hose 7 is curved therealong, whatever said tilt A, and,
- the above step of delivering the materials to the barge comprises delivering said materials while the mixture is sucked through the towed suction hose.
- this hose 7 will preferably vary contingent to the unwound (or wound) length of the hanging ropes 26, 26a, 26b, and,
- the above step of delivering will comprises, while the mixture materials + water is sucked through the flexible suction hose, immediately delivering the sucked mixture to said one of the series of barges that is sailing alongside, with no storage of accumulated materials 3 on vessel 1.
- the step of adapting the immersed length of the flexible suction hose comprises adjusting such a length, so that, while the rigid dredging head is resting on the seabed 30 and the mixture is being sucked, the flexible suction hose 7 is longitudinally loosened, viz. substantially untensioned, longitudinally (tension exerted by the waves, water and sailing speed excluded) .
- the flexible suction hose 7 is longitudinally loosened, viz. substantially untensioned, longitudinally (tension exerted by the waves, water and sailing speed excluded) .
- the so- called mixture of water and materials 3/3a be sucked by the pump unit 13 - preferably the submerged pump unit 13a - through the suction flexible hose 7, while the ship 1 is sailing over the concession,
- vessel 1 be a non self propelled vessel, it would be pushed or pulled by a push or pull tug (non- preferred embodiment) .
- the dredging vessel is especially adapted to dredge in open sea, it could also be used in any water, including rivers, lakes....
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Ship Loading And Unloading (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10730449.5A EP2452021B1 (de) | 2009-07-06 | 2010-07-02 | Baggerschiffsystem |
CY20131100484T CY1114180T1 (el) | 2010-07-02 | 2013-06-14 | Συστηματα σκαφους βυθοκορησης |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2009/058526 WO2011003438A1 (en) | 2009-07-06 | 2009-07-06 | A dredge vessel system for deep-sea dredging |
EP10730449.5A EP2452021B1 (de) | 2009-07-06 | 2010-07-02 | Baggerschiffsystem |
PCT/EP2010/059500 WO2011003838A1 (en) | 2009-07-06 | 2010-07-02 | A dredge vessel system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2452021A1 true EP2452021A1 (de) | 2012-05-16 |
EP2452021B1 EP2452021B1 (de) | 2013-05-01 |
Family
ID=45929282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10730449.5A Not-in-force EP2452021B1 (de) | 2009-07-06 | 2010-07-02 | Baggerschiffsystem |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2452021B1 (de) |
-
2010
- 2010-07-02 EP EP10730449.5A patent/EP2452021B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2011003838A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2452021B1 (de) | 2013-05-01 |
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