EP3480105A1 - Procédé et appareil permettant de recouvrir un objet sur une surface inférieure - Google Patents

Procédé et appareil permettant de recouvrir un objet sur une surface inférieure Download PDF

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Publication number
EP3480105A1
EP3480105A1 EP18198939.3A EP18198939A EP3480105A1 EP 3480105 A1 EP3480105 A1 EP 3480105A1 EP 18198939 A EP18198939 A EP 18198939A EP 3480105 A1 EP3480105 A1 EP 3480105A1
Authority
EP
European Patent Office
Prior art keywords
cavity
wreck
bottom sediment
water
sediment
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
Application number
EP18198939.3A
Other languages
German (de)
English (en)
Other versions
EP3480105B1 (fr
Inventor
Jerry Edvardsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sea-Craft Support Jerry Edvardsson
Original Assignee
Sea-Craft Support Jerry Edvardsson
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.)
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Application filed by Sea-Craft Support Jerry Edvardsson filed Critical Sea-Craft Support Jerry Edvardsson
Publication of EP3480105A1 publication Critical patent/EP3480105A1/fr
Application granted granted Critical
Publication of EP3480105B1 publication Critical patent/EP3480105B1/fr
Active legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
    • 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
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/52—Tools specially adapted for working underwater, 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
    • E02F3/8858—Submerged units
    • 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
    • E02F3/9206—Digging devices using blowing effect only, like jets or propellers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/022—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with tools digging laterally with respect to the frame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/24—Anchors
    • B63B21/26—Anchors securing to bed
    • B63B2021/267—Anchors securing to bed by penetration of anchor into the sea bed using water jets, e.g. by ground or sand fluidisation
    • 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
    • B63C7/00—Salvaging of disabled, stranded, or sunken vessels; Salvaging of vessel parts or furnishings, e.g. of safes; Salvaging of other underwater objects
    • 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
    • E02F3/8858—Submerged units
    • E02F3/8866—Submerged units self propelled

Definitions

  • the invention concerns under water applications and especially to handling of objects on the bottom of a water region.
  • the document EP1675768B1 describes an example of a method for handling of substances harmful to the environment in a wreck. More particularly the EP1675768 B1describes a method and a system for collecting oil from a wreck by placing a covering device at the wreck. The collected oil is pumped up for further transportation.
  • One object of the invention is to provide, from an environmental perspective an efficient method for handling of an object on a bottom surface of bottom in a water area and to achieve an efficient method to cover the object by using the bottom sediment from a cavity in the bottom.
  • the object is achieved by a method to cover a wreck on a bottom surface of a bottom of a water area by using bottom sediment from the bottom.
  • the method comprises mixing of the bottom sediment with water from the water area to achieve a cavity in the bottom.
  • the bottom sediment is suspended with water from the water area.
  • the bottom sediment is mixed with water from the water area during the time the cavity is created.
  • suspension or mixture of the bottom sediment and water is accomplished while the cavity is created.
  • a cavity is therefore meant a zone in the bottom with partially looser bottom sediment comparing to the bottom sediment that has not been mixed with water.
  • the looser bottom sediment is obtained by mixing the bottom sediment with water at use of the method.
  • the cavity is created to permit that a landslide of the bottom sediment under and/or around the wreck is achieved, which landslide causes the bottom sediment under and/or around the wreck to move down into the cavity.
  • the cavity is created on such a distance from the wreck and with such a depth that the bottom sediment under and/or around the wreck collapses and moves down into the cavity.
  • conditions to achieve a landslide are established by digging or flushing of the cavity.
  • the object is sinking in relation to the ambient bottom surface when a landslide has been achieved, i.e. I relation to the initial bottom surface before the landslide and also in relation to the ambient bottom surface that not been effected by the landslide.
  • the object is covered with at least the suspended bottom sediment while and after that the bottom sediment under and/or around the object has been moved down into the cavity.
  • the suspended bottom sediment but also the bottom sediment that is drawn with the water streams or that in a different way has been mixed with water, is covering the object simultaneously and after that the bottom sediment under and/or around the object has been moved down into the cavity.
  • a landslide is achieved which causes the object to sink.
  • the object is covered by at least the suspended bottom sediment. With this, the object is encapsulated in the bottom sediment. In other words, the object is buried into the bottom sediment.
  • the degradation processes such as corrosion of the abject may be stopped or at least reduced, which reduces the risks for environmental impacts that may be caused by degradation of the wreck. Further, due to a layer of bottom sediment that has covered the object, also the risks for undesirable substances from the object that may come out from the object and that may be spread in the water is reduced.
  • the method may comprise to achieve a break indication in the bottom sediment adjacent to the object and on the substantially opposite side of the wreck in relation to the cavity.
  • the break indication is meant an elongate pit, hole or channel that is digged or flushed in the bottom sediment on the substantially opposite side of the object in relation to the cavity to achieve a landslide as described above.
  • a break indication a displacement of the bottom sediment into the cavity is facilitated when the bottom sediment releases at the break indication.
  • a controlled landslide may be achieved with a break indication.
  • the break indication may have a form of an arc i.e. that may extend along a crooked line.
  • the break indication may for example have a form of a half-circle. Thereby the object may at least partially be enclosed in order to facilitate said landslide and to achieve a better control of the movement of the bottom sediment into the cavity.
  • the method may further comprise to decide the nature of the bottom sediment and the depth conditions.
  • the sort of the soil mass forming the bottom sediment can be determined.
  • the depth of the bottom sediment can be determined before said cavity is achieved. In this way, a better control over the step of achieving the cavity may be obtained.
  • the cavity may be achieved by a beam of pressurized water is directed towards the bottom. Thereby the bottom sediment may be mixed with water in an efficient way while the cavity is accomplished.
  • the object may be a wreck such as a boat wreck or aircraft wreck.
  • the method may comprise monitoring of the movement of the bottom sediment and the wreck down into the cavity by using a monitoring device. With monitoring of the movement of the bottom sediment down into the cavity some risks connected to the implementation of the method may at least reduced.
  • An another object of the present invention is to provide, from an environmental perspective an efficient arrangement for handling of an object on a bottom surface of bottom of a water area and to achieve an efficient arrangement to cover the object by using the bottom sediment from a cavity in the bottom.
  • an arrangement adapted for mixing of a bottom sediment of a bottom of a water area with water from the water area to achieve a cavity in the bottom wherein the arrangement comprises: at least one nozzle connected to a pump arranged to pump water through the at least one nozzle to achieve a beam of pressurised water. Further the arrangement comprises a control unit, a platform with hydraulic winches, arranged to position the at least one nozzle towards the bottom and a balance pontoon.
  • the nozzles may be positioned in a correct way towards the bottom by the platform and further a cavity may be created in the bottom by using the beam.
  • the platform may comprise a monitoring device.
  • Fig. 1 illustrates an object 1 on the bottom 2 of a water area, such as for example of a sea.
  • an arrangement 9 has been positioned on the bottom surface 3 on the bottom 2.
  • the arrangement 9 will be described in details in conjunction with Fig. 5 .
  • the arrangement 9 may be connected to a boat 4.
  • the object 1 may be a wreck. Because the wreck, that for example may be a ship wreck, is located on the sea bottom, the wreck has, to some extent, been stabilized there, i.e. the wreck has been stabilized in the bottom sediment.
  • the ship wreck may slide on its bottom bed without any bigger strains down into a predetermined flushed cavity, and to be covered of the loose water saturated sludge from the cavity.
  • the sludge may also be called dredged material.
  • the suspended bottom sediment will stabilize, as all other dredged material, and will isolate the wreck from for example oxygen. Thereby, the corrosion processes may be at least reduced.
  • Fig. 2 illustrates that a cavity 5 has been achieved by using the arrangement 9 near to the object 1.
  • a break indication 7 has been digged or has been flushed on the other side of the object 1 in relation to the cavity 5.
  • the break indication 7 that also may be called a groove can be achieved using the arrangement 9.
  • a suspension is achieved, i.e. a mixture of the bottom sediment and water during the time the cavity is created by using the arrangement 9.
  • the distance g between the cavity 5 and the wreck 1 may for example be about 15-30 meters and can be measured from the center C of the cavity to an edge of the wreck 1.
  • the depth of the cavity can for example be twice the height of the wreck and, for example 20-30 meters.
  • the break indication 7 may be created at a distance b of, for example 10-20 meters from the wreck 1, depending of the size of the wreck and depending on the nature of the bottom sediment.
  • the depth of the break indication may for example be the height of the wreck.
  • Knowing the nature of the bottom sediment means that you know something about the characteristics of the seabed i.e. "the ground mass" in the current area of landslide.
  • the sediment may consist of sand, clay, mud or the like. In order to plan how much and how deeply you need to flush to create the cavity, it may be an advantage to know the nature of the bottom sediment.
  • the break indication may have a form of a groove that may be flushed around the wreck in the form of an up and down turned U, with start and finish where the sediment grave is planned, i.e. in the opening of the U.
  • the advantage of this form is that friction against the slopes of the landslide is eliminated and that the landslide will be cut out as a cake.
  • Depth of this groove i.e. on the break indication 7, behind the wreck, in the bow itself can be about 10 meters.
  • both straight stretches of the U may be flushed of a falling bottom on the grooves down to the depth of the planed cavity which is about 40 meters.
  • the side slope may be about 30 - 40 degrees.
  • the size of the flushed sediment grave may be 1/2 times the length of the ship wreck.
  • An estimated size of an example wreck (Liberty ship) is L (length) 130 m, B (wide) 17 m and Displacement 14,250 tons.
  • Figure 3 shows that a landslide has been achieved by means of the cavity in Fig. 2 and due to forces on the sediment mass below and around the object caused by, inter alia, the weight of the object but also by the weight of the sediment mass.
  • the bottom sediment below and/or around the object 1 has been moved down into the cavity 5.
  • an opening in the bottom defined by the outer edges of the cavity 5 and of the break indication 7 has been achieved.
  • the object has sunk down and a distance d between at least one point p on the surface of the object and the bottom surface 3 has increased.
  • the nozzles of the device 9 are lifted.
  • Fig. 4 illustrates that the object 1 in Fig. 1-3 has been covered by the bottom sediment after a time when conditions around the object have been stabilized.
  • the object has been covered by the bottom sediment from the cavity 5.
  • the object 1 may also be covered by bottom sediment that flows in with ocean currents.
  • the layer of the bottom sediment that covers the object may for example be 1 m or more when an encapsulation of the object is done in order to at least reduce the corrosion processes of the object.
  • Figure 5 illustrates a device 9 adapted to achieve the cavity 5 as illustrated in Fig. 2 .
  • the device 9 comprises: at least one nozzle 11 connected to a pump 13 arranged to pump water through the at least one nozzle 11 to create a beam of pressurized water and a platform 15.
  • a monitoring device 17 such as echo sounder or camera or sonar may be placed at the platform 15.
  • the device 9 may comprise a plurality of nozzles 11.
  • the nozzles 11 may be self-digging nozzles with outlet channels angled upwardly.
  • transponders In order to orient a wreck and to check the wreck position, transponders can be used. With these you can see how deep the wreck is buried and precise positioning for future interests.
  • the dimensions of the device 9 may be about 60 x 25 meters and may comprise two or more pontoons for overflow mode which are filled with air during transport (towing). Further, the device 9 may comprise a balance pontoon. The pontoons may be designed to cope with all existing work depths.
  • the electronics and controllers may also be included in the device. Thrusters, as for example four electrically powered for actuating the device 9, up and down and laterally, may be included in device 9 too. Two of these may also be used in overwater mode for actuating of the device 9. A certain number of pumps connected to encapsulated electric motors and encapsulated hydraulic winches with swivel-operated coil hoses may also be used.
  • Flushing nozzles may be designed as self-draining down at the bottom through rear directed jets as well as a control valve for flushing of the side for the best mixture, water, clay may be used.
  • the control valve can be a hydraulic cylinder that is pressurized with high pressure water from one or several hoses.
  • the device 9 may comprise a guillotine for cutting the hose if the device gets stuck into the sediment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Ocean & Marine Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
EP18198939.3A 2017-11-06 2018-10-05 Procédé et appareil permettant de recouvrir un objet sur une surface inférieure Active EP3480105B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1751371A SE541671C2 (sv) 2017-11-06 2017-11-06 Metod för att täcka över ett vrak på en bottenyta

Publications (2)

Publication Number Publication Date
EP3480105A1 true EP3480105A1 (fr) 2019-05-08
EP3480105B1 EP3480105B1 (fr) 2020-08-26

Family

ID=63833783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18198939.3A Active EP3480105B1 (fr) 2017-11-06 2018-10-05 Procédé et appareil permettant de recouvrir un objet sur une surface inférieure

Country Status (3)

Country Link
EP (1) EP3480105B1 (fr)
DK (1) DK3480105T3 (fr)
SE (1) SE541671C2 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB595291A (en) * 1945-07-02 1947-12-01 Proprietors Of Hay S Wharf Ltd Apparatus for disintegrating earth, mud or the like and for dispersing same
GB804773A (en) * 1955-11-04 1958-11-19 Proprietors Of Hay S Wharf Ltd Apparatus for disintegrating earth, mud or the like
US20100139130A1 (en) * 2008-12-08 2010-06-10 Wagenaar Dirk C Underwater Excavation Tool
EP1675768B1 (fr) 2003-10-13 2011-12-28 Technip France Procede et dispositif de recuperation du petrole d'un reservoir dispose sur un fond marin, notamment d'une epave
US20140137442A1 (en) * 2011-06-17 2014-05-22 Nautilus Minerals Pacific Pty Ltd System and method for seafloor stockpiling

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087981A (en) * 1971-08-27 1978-05-09 Norman Offshore Services Inc. Buoyant self-propelled underwater trenching apparatus
US3877238A (en) * 1973-11-06 1975-04-15 Santa Fe Int Corp Sea sled for entrenching and pipe burying operations
IT1138764B (it) * 1981-05-04 1986-09-17 Snam Progetti Dispositivo per interramento o dissotterramento di condotte subacquee
JPS61122333A (ja) * 1984-11-15 1986-06-10 Tomoe Suzuki 掘削装置
NO311639B1 (no) * 2000-04-05 2001-12-27 Gto Subsea As Fremgangsmåte og anordning for å flytte på stein og lösmasser under vann
NO335885B1 (no) * 2013-03-22 2015-03-16 Jarala As Undervanns anordning for fjerning av sedimenter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB595291A (en) * 1945-07-02 1947-12-01 Proprietors Of Hay S Wharf Ltd Apparatus for disintegrating earth, mud or the like and for dispersing same
GB804773A (en) * 1955-11-04 1958-11-19 Proprietors Of Hay S Wharf Ltd Apparatus for disintegrating earth, mud or the like
EP1675768B1 (fr) 2003-10-13 2011-12-28 Technip France Procede et dispositif de recuperation du petrole d'un reservoir dispose sur un fond marin, notamment d'une epave
US20100139130A1 (en) * 2008-12-08 2010-06-10 Wagenaar Dirk C Underwater Excavation Tool
US20140137442A1 (en) * 2011-06-17 2014-05-22 Nautilus Minerals Pacific Pty Ltd System and method for seafloor stockpiling

Also Published As

Publication number Publication date
SE541671C2 (sv) 2019-11-26
SE1751371A1 (sv) 2019-05-07
DK3480105T3 (da) 2020-11-16
EP3480105B1 (fr) 2020-08-26

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