BE1020785A5 - DEVICE AND METHOD FOR Dredging BOTTOM MATERIAL UNDER WATER. - Google Patents

DEVICE AND METHOD FOR Dredging BOTTOM MATERIAL UNDER WATER. Download PDF

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Publication number
BE1020785A5
BE1020785A5 BE201200473A BE201200473A BE1020785A5 BE 1020785 A5 BE1020785 A5 BE 1020785A5 BE 201200473 A BE201200473 A BE 201200473A BE 201200473 A BE201200473 A BE 201200473A BE 1020785 A5 BE1020785 A5 BE 1020785A5
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BE
Belgium
Prior art keywords
discharge
vessel
carrier
wheel
foregoing
Prior art date
Application number
BE201200473A
Other languages
Dutch (nl)
Inventor
Dominique Maria Colette Hubert Durt
Original Assignee
Baggerwerken Decloedt En Zoon
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Publication date
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Priority to BE201200473 priority Critical
Priority to BE201200473A priority patent/BE1020785A5/en
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Publication of BE1020785A5 publication Critical patent/BE1020785A5/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/181Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels including a conveyor
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/22Component parts
    • E02F3/24Digging wheels; Digging elements of wheels; Drives for wheels
    • E02F3/241Digging wheels; Digging elements of wheels; Drives for wheels digging wheels
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/8833Floating installations
    • E02F3/8841Floating installations wherein at least a part of the soil-shifting equipment is mounted on a ladder or boom
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F7/00Equipment for conveying or separating excavated material
    • E02F7/02Conveying equipment mounted on a dredger
    • E02F7/023Conveying equipment mounted on a dredger mounted on a floating dredger
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/06Floating substructures as supports
    • E02F9/062Advancing equipment, e.g. spuds for floating dredgers

Description

Device and method for dredging bottom material under water
The invention relates to a device for dredging bottom material under water. The invention also relates to a method for dredging bottom material under water using the invented device.
Dredging work is a common part of hydraulic engineering activities, such as, for example, port development, tunnel construction, urban expansion, beach replenishment, coastal protection, installation of power stations such as wind turbines, mining, environmental improvement and the like.
When dredging it is of course important to work efficiently and with the use of as little power as possible to remove as much soil material as possible per unit of time. In recent years, however, more and more emphasis has been placed on the effect of dredging on the surrounding environment, in particular the flora and fauna. This is particularly the case when carrying out dredging work in the vicinity of nature reserves.
Sediment pollution (sediment spill) is a major problem in this regard. During the excavation, dredging, transport and / or dumping of excavated soil material, a part will remain in the water as relatively fine sediment. Such sediment clouds can greatly cloud the water and this increased turbidity disrupts the natural environment.
A known device for dredging an underwater bottom is described in NL-1031253. The known cutting head is a body of rotation rotatable about an axis, formed by a base ring and a hub spaced therefrom and concentrically therewith, between which a number of arms extend, which are provided with cutting tools, such as teeth. There are continuous openings between the arms through which the dredged surface can be discharged. The cutter head is used in combination with a cutter suction dredger (also referred to as cutter suction dredger). A cutter suction dredger comprises a vessel that is anchored in the subsurface by means of spud poles. The anchoring absorbs the reaction forces occurring during the dredging and directs them to the subsurface. A suction pipe is attached to the cutter suction dredger ladder, which is connected to the cutter head and along which the dredged ground mixed with water is removed. When dredging, the cutting head is brought into rotation and, with a ladder and suction line, is submerged under a generally oblique angle until it touches the bottom. The cutting head is then dragged through the bottom in a rotating condition by moving the ladder from port side to starboard side with the help of winches, the cutting head making a lateral swinging movement. By moving the cutter suction dredger over a certain distance each time and repeating the aforementioned swinging motion, a complete bottom surface can be dredged. The suction line is connected to a pump which then pumps the dredging mixture through a pressure line to a container that is moored alongside or directly to a dump zone.
The hydraulic transport of the known cutter suction dredger has the disadvantage that, depending on the substrate, relatively many fine clay and sludge particles are introduced into an aqueous suspension from which these particles can only be removed with great effort and / or time. This can cause a relatively large amount of sediment contamination when loading bins or pressing in the landfill zone. This technique can therefore not always be used in the vicinity of nature reserves.
The present invention has for its object to provide a device for dredging subsoil under water which in particular makes it possible to efficiently dredge subsoil without causing much sediment pollution, and this, in particular at larger depths and with harder surfaces. , with a significantly higher efficiency than is possible with other mechanical diggers, such as dredgers or bucket dredgers.
To this end, the invention provides a device comprising a vessel anchored with an underwater bottom with a ladder which can be positioned obliquely downwards in the body of water, which at its free end is provided with at least one rotating cutting tool, with a passage for excavated soil material on which connecting an inlet end of a discharge means for the excavated soil material, which discharge means comprises a carrier for the soil material driven by a mechanical drive. An outlet end of the discharge means can open out at any desired position, but will usually be located at the height of the vessel, for example on the deck of the vessel.
The rotary cutting tool can in principle comprise any cutting tool capable of excavating soil material. In one embodiment, the at least one rotary cutting tool may comprise a body of rotation rotatable about a central axis, which body is formed by a base ring and a hub spaced therefrom and concentrically therebetween, between which a number of support arms extend, which are provided with cutting tools, e.g. form of chisels.
In another, more advantageous embodiment, the rotary cutting tool comprises an excavating wheel, the excavating wheel comprising a wheel rotatable about a horizontal axis, which wheel is provided on the outer circumference with a series of excavating blades distributed over the circumference with an excavating blade arranged forward in the direction of rotation. directed inlet operation, and wherein the outer circumference of the wheel comprises a passage for excavated soil material, to which passage the inlet end of the discharge means connects to the excavated soil material.
By combining the rotary cutting tool with the described discharge means for the excavated soil material, a lower sediment contamination is surprisingly achieved than is the case with the known cutter suction dredger. In addition, it is possible to work with this, in particular at larger depths and with harder surfaces, with a considerably higher efficiency than other mechanical diggers such as dredging cranes or bucket dredgers. The invented device is therefore advantageously used in a method for dredging bottom material under water, which comprises the steps of lowering the ladder and the discharge means of the device under water; loosening the bottom material by rotating the cutting tool; discharging dredged soil material through the passage to the carrier of the discharge means; and transporting the dredged bottom material by driving the carrier.
The higher efficiency of the invented device as compared to the known dredging cranes, in particular at larger depths, follows that the present invention permits a virtually continuous excavation process. When using dredging cranes, the digging process is only part of the dredging cycle. After all, a relatively large part of the cycle is spent on moving (hoisting, swinging, celebrating) and dumping the dredged surface and digging spoon. The deeper the excavation, the smaller the share of the excavation process in the dredging cycle and the less efficient the dredging cycle. In addition to dredging cranes, a much better dredging tolerance can be obtained with the present invention, which is very important, for example, when dredging tunnel trenches. Moreover, the improved dredging tolerance further increases efficiency because the excavation of too much substrate is avoided.
The higher efficiency with respect to the bucket dredger, for example known from US 1,540,276, is a consequence, in particular for harder soils, of the disconnection of the drive for the excavation process and the drive for the (mainly vertical) transport of the dredged substrate. With a bucket dredger the available digging capacity is relatively limited, because the forces for the digging process must after all be transferred by the drive wheel of the bucket chain, by the bucket chain itself and alternately by each of the buckets. The use of larger digging capacities would require that each of these parts be weighted, leading to an excessively heavy and expensive construction. A further advantage of the invented device is that the speeds of the rotary cutting tool (the rotation speed) and those of the discharge means (the discharge speed) can be selected independently of each other. This further increases efficiency.
In an embodiment of the invention, a device is provided wherein the carrier of the discharge means is provided with a roof. This has a favorable effect on the further reduction of sediment pollution.
In another embodiment of the invention the device comprises a suction line connected to pump means, which line extends from the vessel to the vicinity of the inlet end of the discharge means. Such a suction line makes it possible to suck up any bottom material which has collected at the inlet end from the discharge means and to discharge it to the vessel. The suction line can moreover create a slight underpressure at the inlet end and the rotating cutting tool, as a result of which an inflow through the cutting tool can occur which can further reduce the turbidity in the environment. In order to achieve the aforementioned effects, the cross-section of the suction line and the power and flow rate applied by the pump means can be considerably lower than the cross-sections and power levels of suction line and pump means, for example less than 25%, that are usual with a cutter suction dredger.
In yet another embodiment of the invention, a device is provided wherein the discharge means is provided with a scraping device at least at an outlet end. This also allows more sticky surfaces such as clay to be collected, further increasing the efficiency of the dredging process in this type of surface.
The mechanical drive of the carrier of the discharge means can comprise any drive suitable for this purpose. A suitable embodiment of the device according to the invention comprises a mechanical drive in the form of endless chains running between two wheels, wherein at least one wheel is drivable and the carrier is connected to the chains.
The carrier of the discharge means can also be chosen within wide limits, as long as the discharge of excavated soil material does not take place hydraulically under substantial mixing with water. A suitable embodiment of the device in this context comprises a carrier in the form of a conveyor belt. Such a carrier allows a substantially continuous discharge of excavated soil material. It can be advantageous here, in particular also to allow somewhat steeper transport if the conveyor belt is provided on a supporting surface with retaining means for the bottom material, such as for instance V-shaped ribs.
To this end, in another embodiment the carrier comprises at least two conveyor belts rotating in opposite directions of rotation. In such an assembly of two or more mutually stacked conveyor belts, the conveyor belts run substantially mutually parallel. By having a second conveyor belt (in the opposite clockwise direction) rotate at least on top of the conveyor belt, the dredged bottom material trapped between the two conveyor belts is discharged upwards.
Particularly for excavating soil material at a relatively great depth, in particular at depths greater than -25 m relative to the water surface, it is advantageous to use an embodiment of the device according to the invention, wherein the carrier has a series of mechanical buckets. After all, with such a carrier the discharge means can be placed in the water body at a relatively steep angle, so that greater depths can be achieved for the same length of the discharge means. Preferably, the said buckets are of relatively light construction, as a result of which they are not able to excavate soil material, but are only designed for discharging soil material excavated by the digging wheel.
The device according to the invention comprises in a suitable embodiment one cutting tool which is rotatable about a horizontal axis, and in particular a digging wheel which comprises one wheel rotatable about a horizontal axis, which wheel is provided on the outer circumference with a series distributed over the circumference excavating blades provided with an inlet opening directed in the direction of rotation, and wherein the outer circumference of the wheel comprises a passage for excavated soil material. The axis of rotation of the wheel is substantially horizontal, which means that this axis runs parallel to the water surface. The axis of rotation can thereby lie in the plane of the ladder to which the digging wheel is attached, but preferably extends perpendicularly to this plane. The cutting tool can also cut in the axis direction of the ladder, but in such an embodiment it is necessary (internally in the excavating device) to receive a relatively short mechanical lifting device, such as for example an Archimedean screw part, to bring the dredged material up to the discharge device .
In an embodiment according to the invention, a device is provided which comprises two cutting tools arranged on either side of the ladder, preferably digging wheels. With such a device the production width can be increased in some circumstances, in particular when the cutting tools are moved in a direction over the underwater bottom which deviates from the direction in which their (common) axis of rotation runs. More cutting tools also offer better shielding and protection for the draining material.
A digging wheel of an embodiment of the invented device comprises a wheel rotatable about a horizontal axis, which wheel is provided with a series of digging blades arranged on the outer circumference. The number of digging blades can be selected according to the circumstances and are preferably evenly distributed over the circumference. The digging blades can be in the form of buckets, digging blades that are substantially U-shaped in radial cross-section of the wheel are preferred. The legs of the U-shape hereby connect to the said outer circumference. Such excavating blades lack a soil, which facilitates the removal of the excavated soil material. For the discharge, in the outer circumference, preferably over the entire length, a passage is provided between the legs of the blades, to which a collecting unit projecting into the wheel connects, which in turn connects to an inlet end of a discharge means, for example in the form of a number of powered buckets.
The cutting tool, preferably the digging wheel, can rotate in operation such that the digging blades operate from bottom to top, but an opposite direction is also possible. During operation of the device, the vessel with the ladder on which the cutting tool is located must be held in place in order to be able to excavate accurately. At relatively low depths the anchoring can take place by lowering spud poles and / or cables. At larger depths (for example more than -35 below the water surface) the use of cables is preferred. The occurring reaction forces act (depending on the direction of rotation of the rotating cutting tool) both downwards, with the tendency to pull the vessel deeper into the water, and in the horizontal direction, with the tendency to pull the cutting tool out of engagement with the underwater bottom to be processed. bring. The horizontal reaction forces can usually be absorbed well with spud poles, but with greater depths the bending moments on the spud pole become very large, so that the use of a spud pole is no longer economical. It has been found that the device according to the invention can also be properly stabilized with cables.
h
A simple embodiment of the device according to the invention is characterized in that the ladder which can be positioned obliquely downwards in the water body from the vessel comprises the discharge means. The ladder and discharge means then form part of the same construction, which comprises, for example, a truss structure, in which the carrier of the discharge means is accommodated, preferably provided with a roof.
In yet another embodiment of the invention, a device is provided wherein the outlet end of the discharge means connects to a second discharge means, which is located on deck of the vessel. This makes possible a quasi-continuous discharge of excavated soil material, which discharge is further facilitated by an embodiment in which the second discharge means comprises a carrier driven by means of a mechanical drive.
A further embodiment of the device according to the invention comprises a device wherein the second discharge means extends in the transverse vessel direction and is translatable in the transverse vessel direction. It is then advantageous if the device further comprises a discharge vessel moored at least on one side of the vessel for the excavated soil material, wherein an end of the second discharge means connects to a well of the discharge vessel.
With the invented device, an underwater bottom can be excavated in an efficient and environmentally friendly manner, an embodiment of the method according to the invention being characterized by a method in which the vessel is anchored to the underwater bottom by lowering a spud pole of the vessel, and the digging wheel over and is moved in the bottom by shifting the vessel from port side to starboard side with the aid of winches, the vessel rotating around the spud pole and the digging wheel making a lateral swinging movement.
In an alternative embodiment of the method according to the invention, the vessel is anchored with the underwater bottom by having anchors connected to the vessel by means of anchor ropes, and the digging wheel is moved over and into the bottom according to a path that is determined by stories of the vessel with the anchor ropes.
Both methods make it possible to excavate an underwater bottom without causing much sediment contamination. A further advantage of the device and method according to the invention is that the depth of the excavation can be carried out very accurately, whereby the excavated underwater bottom has a relatively well-defined and flat surface. This important advantage avoids the unnecessary supply of expensive hydraulic engineering material. For example, the gravel bed required for a tunnel construction foundation will require less gravel supply than is the case with the known method.
The invention will now be further elucidated with reference to the annexed figures, without being otherwise limited thereto. Figure 1 shows a schematic side view of an embodiment of the device according to the invention; figure 2 shows a schematic top view of another embodiment of the device according to the invention; and finally figure 3 shows a schematic perspective view of an embodiment of a digging wheel according to the invention.
With reference to figures 1 and 2, a device 1 is shown for dredging bottom material 2 below the water surface 3. The embodiment shown comprises a vessel 4 that is anchored to the underwater bottom 2 by means of spud poles 5 (the rear spud poles 5 lungs as an aid to anchor the vessel temporarily). The vessel is furthermore provided with a ladder 8 positioned at an oblique angle 6 downwards in the body of water 7. The ladder 8 comprises a lattice structure which is composed of mutually connected tension and pressure bars 80, and which is provided at its free end with: one digging wheel 10. However, it is also possible to provide the ladder 8 on both sides with digging wheels 10. At the other end of the ladder 8 this is rotatably connected around an axis 9 to the vessel 4. The ladder 8 can be connected around the horizontal axis. rotated by means of cables 11 which can for instance be tightened with winches present on the deck (whereby the ladder 8 is raised and the angle 6 is reduced) or celebrated (wherein the ladder 8 is lowered and the angle 6 is increased).
The ladder 8 further comprises a discharge means for the excavated soil material in the form of a carrier 13 for the soil material driven by a mechanical drive 12. In the embodiment shown, the carrier 13 comprises a conveyor belt which transports excavated soil material from bottom to top in the indicated direction 14. The conveyor belt is provided with a (not visible) cover to further prevent sediment pollution. The conveyor belt 13 is provided on the bearing (upper) surface with V-shaped ribs 15 which prevent the bottom material from sliding down.
In the embodiment shown, the outlet end 130 of the conveyor belt 13 connects to a second discharge means in the form of conveyor belt 16. This is located on the deck of the vessel 4 and extends in the transverse direction 17 of the vessel 4. The conveyor belt 16 is preferably translatable in the transverse direction 17, both to starboard and port, as schematically indicated by the double arrow 18. The translation of the conveyor belt 16 allows an end 180 of the conveyor belt 16 to be connected to the 19 of a drainage vessel 20, which is moored on one side of the vessel 4 and which can receive the excavated soil material. Relatively dry bottom material dug out by the device according to the invention can easily be carried by the discharge vessel 20 to an advertising area. Because the soil material is relatively dry, dumping it into the advertising area will entail relatively little sediment contamination. For example, it is possible to moor the discharge vessels 20 against a quay and to empty them there with cranes.
With reference to Figure 3, a digging wheel 10 according to the invention will now be described in more detail. The excavating wheel 10 shown is connected to the lower end of the ladder 8 by means of a supporting structure 105 and comprises a wheel 102 rotatable about a horizontal axis 101, which wheel is provided on its outer circumference with a series of excavating blades 103 distributed over the circumference with an inlet opening 105 directed in the direction of rotation 104 forwards (upwards). The excavating vanes 103 have the shape of a U in radial cross-section (along the plane 107) of the wheel 102, the legs of the U-shape connecting to said said outer circumference. The excavating vanes 103 are therefore not provided with a bottom towards which they are tapered somewhat to complicate the failure of excavated soil material. For the discharge of the bottom material present in the excavating vanes 103, a passage 106 is provided in the outer circumference of the wheel 102 over the entire length between the legs of the vanes 103, to which a collecting unit 108 projecting into the wheel 102 connects. The bottom material is pushed out of the excavating blades 103 by a push-off lip 109 which extends substantially in the circumferential direction of the wheel 102. The bottom material pushed from the vanes 103 ends up in the collecting unit 108, which in turn connects to an inlet end 131 of the discharge means 13 which in the embodiment shown in Figure 3 has a carrier in the form of a series of holders connected to a mechanical drive 132, wherein the mechanical drive comprises endless chains 133 running between two gear wheels (not shown), wherein at least one gear wheel is driven.
The wheel 102 of the digging wheel 10 is rotated by means of a rotary motor 110 in the indicated direction 104 about the axis 101, whereby the digging blades 103 come into contact with their lower edge with the underwater bottom 2 and release material therefrom. This material is transported via the driven holders 132 to the deck of the vessel 4 in the manner indicated above and, if desired, to the hopper 19 of the discharge vessel 20.
According to the invention, a method is provided in which the ladder 8 is lowered under water by allowing the cables 11 to be celebrated until the grave wheel 10 reaches the bottom, the ladder 8 making a certain angle 6 with the horizontal direction. The digging wheel is then rotated by means of the rotary motor 110, whereby soil material is loosened and collected in the digging blades 103. This bottom material is discharged via the passage 106 to the holders 132, which then transport the dredged bottom material via the mechanical drive (12, 133) to the deck of the vessel 4.
The vessel 4 can hereby be anchored with the underwater bottom 2 by lowering spud poles 5, the digging wheel 10 being moved over and into the bottom by the vessel 4 with the aid of winch-operated anchor cables 30 (which in turn are anchored with the submerging underwater bottom 2 by alternating anchors 31 from port side to starboard side where the vessel 4 rotates around the spud pole 5 and the digging wheel 10 makes a lateral swinging movement.

Claims (20)

  1. Device for dredging subsoil under water, comprising a vessel anchorable with an underwater bottom with a ladder that can be positioned obliquely downwards in the body of water from the vessel and which at its free end is provided with at least one rotating cutting tool comprising a passage for excavated soil material, to which passage an inlet end of a discharge means connects to the excavated soil material, which discharge means comprises a carrier for the soil material driven by a mechanical drive.
  2. Device as claimed in claim 1, wherein the rotary cutting tool comprises an excavating wheel, wherein the excavating wheel comprises a wheel rotatable about a horizontal axis, which wheel is provided on the outer circumference with a series of excavating blades distributed over the circumference, directed inlet opening, and wherein the outer circumference of the wheel comprises a passage connecting to the inlet end of the discharge means for excavated soil material.
  3. Device as claimed in claim 1 or 2, wherein the carrier of the discharge means is provided with a roof.
  4. Device as claimed in any of the foregoing claims, wherein the device comprises a suction conduit connected to pump means which extends from the vessel to the vicinity of the inlet end of the discharge means.
  5. 5. Device as claimed in any of the foregoing claims, wherein the discharge means is provided with a scraping device at least at an outlet end.
  6. Device as claimed in any of the foregoing claims, wherein the mechanical drive comprises endless chains running between two wheels, wherein at least one wheel is drivable, and the carrier is connected to the chains.
  7. Device as claimed in any of the foregoing claims, wherein the carrier comprises a conveyor belt.
  8. Device as claimed in claim 7, wherein the conveyor belt is provided on a supporting surface with retaining means for the bottom material, such as for instance V-shaped ribs.
  9. Device as claimed in claim 7 or 8, wherein the carrier comprises two conveyor belts rotating in opposite directions of rotation,
  10. Device as claimed in any of the foregoing claims, comprising two cutting tools arranged on either side of the ladder.
  11. Device as claimed in any of the foregoing claims, wherein the carrier comprises a series of buckets connected to the mechanical drive.
  12. 12. Device as claimed in any of the foregoing claims, wherein the ladder positionable obliquely downwards in the water body from the vessel comprises the discharge means.
  13. Device as claimed in any of the foregoing claims, wherein the outlet end of the discharge means connects to a second discharge means, which is situated on deck of the vessel.
  14. Device as claimed in claim 13, wherein the second discharge means comprises a carrier driven by means of a mechanical drive.
  15. Device as claimed in claim 13 or 14, wherein the second discharge means extends in the transverse ship direction, and is translatable in the transverse ship direction.
  16. Device as claimed in any of the foregoing claims, comprising a discharge vessel moored at least on one side of the vessel for the excavated bottom material, wherein an end of the second discharge means connects to a well of the discharge vessel.
  17. A method for dredging bottom material under water by means of a device according to any of claims 1-16, comprising the steps of: providing a device according to any of claims 1-16; lowering the ladder and the draining means of the device under water; loosening the bottom material by rotating the cutting tool; discharging dredged soil material through the passage to the carrier of the discharge means; transporting the dredged bottom material by driving the carrier.
  18. The method of claim 17, wherein the vessel is anchored to the underwater bottom by lowering spud poles from the vessel, and the cutting tool is moved over and into the bottom by hauling the vessel alternately from port side to starboard side using winches vessel rotates around the spud pole and the cutter makes a sideways swinging movement.
  19. A method according to claim 18, wherein the vessel is anchored to the underwater bottom by having the bottom engaged with anchor ropes, anchors connected to the vessel, and the cutting tool is moved over and into the bottom along a path defined by stories of the vessel with the anchor ropes.
  20. The method of claim 19, wherein the trajectory is substantially linear.
BE201200473A 2012-07-06 2012-07-06 DEVICE AND METHOD FOR Dredging BOTTOM MATERIAL UNDER WATER. BE1020785A5 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE201200473 2012-07-06
BE201200473A BE1020785A5 (en) 2012-07-06 2012-07-06 DEVICE AND METHOD FOR Dredging BOTTOM MATERIAL UNDER WATER.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BE201200473A BE1020785A5 (en) 2012-07-06 2012-07-06 DEVICE AND METHOD FOR Dredging BOTTOM MATERIAL UNDER WATER.
EP13175430.1A EP2682528A3 (en) 2012-07-06 2013-07-05 Device and method for dredging bed material under water
AU2013206741A AU2013206741A1 (en) 2012-07-06 2013-07-08 Device and method for dredging bed material under water

Publications (1)

Publication Number Publication Date
BE1020785A5 true BE1020785A5 (en) 2014-05-06

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EP (1) EP2682528A3 (en)
AU (1) AU2013206741A1 (en)
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EP2966227A3 (en) * 2014-07-10 2016-03-23 Deme Building Materials N.V. Dredging vessel
EP2827310A1 (en) * 2013-07-16 2015-01-21 Televic Healthcare NV System for launching an alarm
US9677577B1 (en) * 2016-12-09 2017-06-13 Ellicott Dredge Enterprises, Llc Dredge having modular hydraulic manifolds
CN108797685A (en) * 2018-06-26 2018-11-13 马鞍山松鹤信息科技有限公司 A kind of dredger
CN109138014A (en) * 2018-09-20 2019-01-04 杜艳阳 A kind of rotatable and easy to remove large-scale rotation excavating bucket-wheel of mining
CN109881731B (en) * 2019-03-26 2020-01-10 深圳市翠绿洲环境艺术有限公司 River channel ecological restoration system and method based on black and odorous water river
CN110700179B (en) * 2019-10-22 2021-02-26 温州江航建设有限公司 Regulating and controlling system for water conservancy and hydropower engineering and regulating and controlling method thereof

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