EP2840187A1 - Verfahren und Vorrichtung zur Herstellung eines Grabens in einem Gewässergrund - Google Patents

Verfahren und Vorrichtung zur Herstellung eines Grabens in einem Gewässergrund Download PDF

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Publication number
EP2840187A1
EP2840187A1 EP13181359.4A EP13181359A EP2840187A1 EP 2840187 A1 EP2840187 A1 EP 2840187A1 EP 13181359 A EP13181359 A EP 13181359A EP 2840187 A1 EP2840187 A1 EP 2840187A1
Authority
EP
European Patent Office
Prior art keywords
trench
debris
cutting
soil
sea floor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13181359.4A
Other languages
English (en)
French (fr)
Inventor
Roger Paul White
Simon Vivian Ranulf Bateson
John Graeme Walker
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.)
Soil Machine Dynamics Ltd
Original Assignee
Soil Machine Dynamics Ltd
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 Soil Machine Dynamics Ltd filed Critical Soil Machine Dynamics Ltd
Priority to EP13181359.4A priority Critical patent/EP2840187A1/de
Publication of EP2840187A1 publication Critical patent/EP2840187A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E02F3/8875—Submerged units pulled or pushed
    • 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
    • E02F5/10—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables
    • E02F5/104—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables for burying conduits or cables in trenches under water
    • E02F5/106—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with arrangements for reinforcing trenches or ditches; with arrangements for making or assembling conduits or for laying conduits or cables for burying conduits or cables in trenches under water using ploughs, coulters, rippers
    • 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
    • E02F5/12—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with equipment for back-filling trenches or ditches
    • E02F5/125—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with equipment for back-filling trenches or ditches underwater

Definitions

  • the present invention relates to a method and apparatus for forming a trench in a sea floor, and relates particularly, but not exclusively, to a method and apparatus for installing a cable in a trench in a sea floor.
  • Preferred embodiments of the present invention seek to overcome one or more of the above disadvantages of the prior art.
  • an apparatus for forming a trench in a sea floor comprising:-
  • this provides the advantage of enabling the cable to be buried to the required depth using a smaller pull force. For example, it has been found that a cable can be buried to a depth of 2.5 metres by means of an apparatus weighing 70 Tonnes and having a pull force of 150 tonnes, compared with a prior art cable plough having a weight of 160 Tonnes and operating at a pull force of 350 Tonnes.
  • the second side walls may be substantially parallel to each other.
  • At least one said second cutting part may be adapted to be mounted to at least one respective said first cutting part subsequently to cutting of said first trench portion.
  • This provides the advantage of enabling the apparatus to be easily converted from its first pass mode, in which the first trench portion is cut, to its second pass mode, in which the second trench portion is cut.
  • an apparatus for forming a trench in a sea floor comprising:-
  • first debris displacing means adapted to be located forwards of the first ground engaging means in the direction of travel of the apparatus for displacing debris from a path of the soil cutting means, this provides the advantage of avoiding the need for a separate boulder clearing apparatus, as a result of which fewer pieces of apparatus are required, thereby reducing costs.
  • the first debris displacing means may be removably mounted to the apparatus.
  • the apparatus may further comprise second debris displacing means arranged rearwards of said soil cutting means in the direction of travel of the apparatus for displacing debris away from said apparatus.
  • the second debris displacing means may comprise at least one detachable extension for increasing the range of said second debris displacing means.
  • the apparatus may further comprise second ground engaging means located rearwards of said second debris displacing means in a direction of travel of the apparatus.
  • the second debris displacing means may be adapted to displace debris away from a path of said second ground engaging means.
  • This provides the advantage of enabling the second ground engaging means to engage relatively stable ground after passage of said second debris displacing means.
  • the first debris displacing means may be adapted to displace debris when said soil cutting means is in a raised position thereof.
  • an apparatus for forming and/or filling a trench in a sea floor comprising:-
  • the soil displacing means may comprise at least one detachable extension for increasing the range of said soil debris displacing means.
  • This provides the advantage of enabling detachable extensions to be used in boulder clearing and backfill modes of an apparatus, thereby minimising the number of components required.
  • the body may comprise a first body member having attachment means for deploying said apparatus and/or control means for enabling control of operation of said apparatus, and a second body member removably attached to said first body member.
  • This provides the advantage of enabling permanently required features such as lift points, hydraulic power units and electronics to be located on the first body member, and features only required in certain modes of operation to be located on the second body portion, thereby minimising the number of components required and reducing costs.
  • the apparatus may further comprise at least one attachment member for applying a towing force to the apparatus at a plurality of locations on said attachment member, wherein said attachment member is adapted to be pivoted relative to the body.
  • a method for forming a trench in a sea floor comprising towing an apparatus as defined above such that said first cutting part cuts said first trench portion in the sea floor, and towing the apparatus subsequently to cutting of said first trench portion such that said second cutting part cuts said second trench portion.
  • the method may further comprise towing an apparatus as defined above to displace debris from a path of said soil cutting means prior to cutting of said first trench portion.
  • the method may further comprise towing an apparatus as defined above subsequently to formation of said trench to displace debris into said trench to cover an elongate object located in the trench.
  • the method may further comprise locating an elongate object in the trench.
  • a universal plough 2 for clearing debris such as boulders from a region of the sea bed where a trench is to be formed, forming the trench in the sea bed for receiving a cable (not shown) and filling the trench subsequently to insertion of the cable into the trench is shown.
  • the plough 2 has a body 4 comprising a first body member 6 supporting a hydraulics unit 8 and an electronics pod 10 for controlling the hydraulics unit 8, and a second body member 12 removably mounted to the first body member 6.
  • a single point lift attachment 14 is provided on the first body member 6.
  • First ground engaging means in the form of a pair of adjustable front skids 16 is mounted to the first body member 6 by means of hydraulic rams 18.
  • the hydraulic rams 18 enable the height of the front skids 16 to be adjusted relative to the body 4, which in turn enables the height of soil cutting means in the form of a plough share 20 for cutting a trench in the sea floor to be adjusted relative to the sea floor.
  • the share 20 is mounted to the second body member 12, as well as fixed mouldboards 22, the purpose of which will be described in greater detail below.
  • First debris displacing means in the form of a pair of boulder clearing blades 24 for displacing debris away from a path of the share 20 is removably mounted forwards of the adjustable front skids 16.
  • a towing cable 26 is mounted to the ends of a pivotable bar 28 which is pivotably mounted to the first body member 6 and is pivotable relative to the first body member 6 by means of respective hydraulic rams (not shown) to enable steering of the plough 2. This enables the plough 2 to counteract the effect of inclines in the sea bed.
  • Second debris displacing means in the form of a pair of adjustable inner mouldboards 30 having detachable outer mouldboards 32 is pivotably mounted to the second body member 12.
  • Second ground engaging means in the form of a pair of rear stabilisers 34 is mounted to the second body member 12 behind the inner mouldboards 30.
  • the share 20 is raised clear of the sea bed by adjustment of the adjustable front skids 16 by hydraulic rams 8, and the plough 2 is towed by a vessel to the left as shown in Figures 1 and 2 .
  • the boulder clearing blades 24 clear a path for the front skids 16 and share 20, and the adjustable inner mouldboards 30 with detachable outer mouldboards 32 clear a path for the rear stabilisers 34.
  • the front boulder clearing blades 24 and rear detachable outer mouldboards 32 are removed, and the adjustable inner mouldboards are pivoted outwards relative to the second body member 12 by means of respective hydraulic cylinders 36.
  • the share 20 brought into its cutting position relative to the sea bed by raising the adjustable front skids 16, as shown in Figure 4 .
  • the plough 2 is then towed by the vessel such that the share 20 forms a shallow, truncated V-shaped trench, i.e. a generally flat bottomed trench of depth 1.2 m having inclined side walls.
  • the fixed mouldboards 22 and adjustable inner mouldboards 30 displace spoil generated in forming the trench outwardly sideways of the trench to form spoil heaps on each side of the trench outwards of rear stabilisers 34. If inclines in the sea bed are encountered, the effect of such inclines can be corrected by adjusting the orientation of the pivotable member 28 relative to the first body member 6 by means of hydraulic rams.
  • the plough 2 is converted to its second pass trenching mode by mounting a removable share extension boot 38 to the lower part of the share 20.
  • the vessel tows the plough to cause the share extension boot 38 to cut a second trench portion having generally parallel side walls at the bottom of the first trench portion.
  • the total depth of the bottom of the second trench portion below the sea bed is typically 2.2 m to 3.2 m.
  • Spoil generated in formation of the second trench portion is partially displaced from the trench by means of the fixed mouldboards 22 and adjustable inner mouldboards 30, but some spoil will remain in the trench and can be subsequently displaced by means of a jetting apparatus (not shown) which will be familiar to persons skilled in the art.
  • the cable (not shown) is laid into the second trench portion.
  • the second body member 12 is detached from the first body member 6 and replaced by a third body member 40.
  • Soil displacing means in the form of a pair of mouldboards 42 is pivotably mounted to the third body member 40, and detachable outer mouldboards 44 are mounted to the mouldboards 42.
  • Mouldboard retaining chains 46 limit the extent to which the mouldboards 42 can pivot outwards of the body 4.
  • a pair of adjustable rear skids 48 are mounted to the third body member 40 and the height of the skids 48 can be adjusted by means of hydraulic rams 50.
  • the plough 2 is then towed by the vessel such that the mouldboards 42, 44 direct spoil generated during formation of the trench back into the trench to cover the cable located in the second trench portion.
  • the adjustable rear skids 48 are located rearwardly of the mouldboards 42, 44, so that the plough 2 is supported on a relatively flat surface after spoil heaps have been displaced by the mouldboards 42, 44.

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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)
  • Electric Cable Installation (AREA)
EP13181359.4A 2013-08-22 2013-08-22 Verfahren und Vorrichtung zur Herstellung eines Grabens in einem Gewässergrund Withdrawn EP2840187A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13181359.4A EP2840187A1 (de) 2013-08-22 2013-08-22 Verfahren und Vorrichtung zur Herstellung eines Grabens in einem Gewässergrund

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13181359.4A EP2840187A1 (de) 2013-08-22 2013-08-22 Verfahren und Vorrichtung zur Herstellung eines Grabens in einem Gewässergrund

Publications (1)

Publication Number Publication Date
EP2840187A1 true EP2840187A1 (de) 2015-02-25

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ID=49033878

Family Applications (1)

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EP13181359.4A Withdrawn EP2840187A1 (de) 2013-08-22 2013-08-22 Verfahren und Vorrichtung zur Herstellung eines Grabens in einem Gewässergrund

Country Status (1)

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EP (1) EP2840187A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106560564A (zh) * 2016-03-31 2017-04-12 中国石油天然气集团公司 原土回填装置
EP3216925A1 (de) 2016-03-08 2017-09-13 Soil Machine Dynamics Limited Verfahren und vorrichtung zur herstellung eines grabens in einem gewässergrund
GB2573588A (en) * 2018-05-08 2019-11-13 Atlantic Marine & Aviation Llp Subsea apparatus
GB2573530A (en) * 2018-05-08 2019-11-13 Atlantic Marine & Aviation Llp Subsea clearing apparatus
EP3584375A1 (de) * 2015-06-24 2019-12-25 Oceaneering International Services Limited Meeresbodenpflug
WO2020148514A1 (en) * 2019-01-16 2020-07-23 Osbit Ltd Subsea plough for burying a flexible elongate member
US11613870B2 (en) 2019-12-05 2023-03-28 Soil Machine Dynamics Limited Apparatus for locating elongate object in a trench in a floor of a body of water

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540226A (en) * 1966-04-15 1970-11-17 Buddy L Sherrod Method of towing a vessel on a body of water
US3788085A (en) * 1971-12-06 1974-01-29 R Holberg Method and apparatus for laying a pipe line
US4069679A (en) * 1976-10-27 1978-01-24 Standard Oil Company Undersea plow
GB2017785A (en) * 1977-12-13 1979-10-10 Brown & Assoc Corp Ag R J Pipe or cable-laying trenching plough
US4410297A (en) * 1981-01-19 1983-10-18 Lynch Robert P Marine continuous pipe laying system
EP0116410A1 (de) * 1983-01-20 1984-08-22 The British Petroleum Company p.l.c. Vorrichtung zum Verfüllen von Gräben
EP0296783A1 (de) * 1987-06-20 1988-12-28 LAND & MARINE ENGINEERING LIMITED Vorrichtung zum Ausheben von Meeresboden
GB2285821A (en) * 1994-01-25 1995-07-26 Soil Machine Dynamics Ltd Trenching plough
GB2329201A (en) * 1997-09-05 1999-03-17 Soil Machine Dynamics Ltd Submarine plough
US20040031174A1 (en) * 2002-08-19 2004-02-19 Ballard Michael L. Method and system for laying pipe through the use of a plow

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3540226A (en) * 1966-04-15 1970-11-17 Buddy L Sherrod Method of towing a vessel on a body of water
US3788085A (en) * 1971-12-06 1974-01-29 R Holberg Method and apparatus for laying a pipe line
US4069679A (en) * 1976-10-27 1978-01-24 Standard Oil Company Undersea plow
GB2017785A (en) * 1977-12-13 1979-10-10 Brown & Assoc Corp Ag R J Pipe or cable-laying trenching plough
US4410297A (en) * 1981-01-19 1983-10-18 Lynch Robert P Marine continuous pipe laying system
EP0116410A1 (de) * 1983-01-20 1984-08-22 The British Petroleum Company p.l.c. Vorrichtung zum Verfüllen von Gräben
EP0296783A1 (de) * 1987-06-20 1988-12-28 LAND & MARINE ENGINEERING LIMITED Vorrichtung zum Ausheben von Meeresboden
GB2285821A (en) * 1994-01-25 1995-07-26 Soil Machine Dynamics Ltd Trenching plough
GB2329201A (en) * 1997-09-05 1999-03-17 Soil Machine Dynamics Ltd Submarine plough
US20040031174A1 (en) * 2002-08-19 2004-02-19 Ballard Michael L. Method and system for laying pipe through the use of a plow

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3584375A1 (de) * 2015-06-24 2019-12-25 Oceaneering International Services Limited Meeresbodenpflug
US10711432B2 (en) 2016-03-08 2020-07-14 Soil Machine Dynamics Limited Method and apparatus for forming a trench in a sea floor
EP3677727A1 (de) 2016-03-08 2020-07-08 Soil Machine Dynamics Limited Verfahren und vorrichtung zur formung eines grabens auf dem meeresboden
KR20180121596A (ko) * 2016-03-08 2018-11-07 쏘일 머신 다이나믹스 엘티디 해저면에 도랑을 형성하기 위한 방법 및 장치
US20190032303A1 (en) * 2016-03-08 2019-01-31 Soil Machine Dynamics Limited Method and Apparatus for Forming a Trench in a Sea Floor
JP2019515158A (ja) * 2016-03-08 2019-06-06 ソイル マシン ダイナミクス リミテッドＳｏｉｌ Ｍａｃｈｉｎｅ Ｄｙｎａｍｉｃｓ Ｌｔｄ 海底にトレンチを形成する方法及び装置
JP2022060519A (ja) * 2016-03-08 2022-04-14 ソイル マシン ダイナミクス リミテッド 海底にトレンチを形成する方法及び装置
WO2017153184A1 (en) * 2016-03-08 2017-09-14 Soil Machine Dynamics Limited Method and apparatus for forming a trench in a sea floor
EP3216925A1 (de) 2016-03-08 2017-09-13 Soil Machine Dynamics Limited Verfahren und vorrichtung zur herstellung eines grabens in einem gewässergrund
CN106560564A (zh) * 2016-03-31 2017-04-12 中国石油天然气集团公司 原土回填装置
CN106560564B (zh) * 2016-03-31 2019-09-06 中国石油天然气集团有限公司 原土回填装置
GB2573588A (en) * 2018-05-08 2019-11-13 Atlantic Marine & Aviation Llp Subsea apparatus
WO2019215444A1 (en) * 2018-05-08 2019-11-14 Atlantic Marine & Aviation Llp Subsea apparatus
GB2573530A (en) * 2018-05-08 2019-11-13 Atlantic Marine & Aviation Llp Subsea clearing apparatus
WO2020148514A1 (en) * 2019-01-16 2020-07-23 Osbit Ltd Subsea plough for burying a flexible elongate member
US11613870B2 (en) 2019-12-05 2023-03-28 Soil Machine Dynamics Limited Apparatus for locating elongate object in a trench in a floor of a body of water

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