US3648998A - Spud lorry for a floating dredger - Google Patents

Spud lorry for a floating dredger Download PDF

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Publication number
US3648998A
US3648998A US23805A US3648998DA US3648998A US 3648998 A US3648998 A US 3648998A US 23805 A US23805 A US 23805A US 3648998D A US3648998D A US 3648998DA US 3648998 A US3648998 A US 3648998A
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US
United States
Prior art keywords
lorry
spud
dredger
shaft
wheel
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.)
Expired - Lifetime
Application number
US23805A
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English (en)
Inventor
Cornelis Van Der Gaag
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Individual
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Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US3648998A publication Critical patent/US3648998A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E02F9/062—Advancing equipment, e.g. spuds for floating dredgers
    • E02F9/065—Advancing equipment, e.g. spuds for floating dredgers characterised by the use of lines with anchors and winches

Definitions

  • the invention relates to a spud lorry for a floating dredger.
  • a lorry is on the one hand provided with one or more guideways surrounding the spud and on the other hand with wheels in order to displace the lorry with respect to the dredger.
  • the spud Due to the pressure that is exerted on the bottom to be dredged by the dredger during dredging, the spud is subjected to shear and flexure. When the sea start dragging and/or there is a swell, the load may even be increased by the waves.
  • the deformation of the spud caused by said pressure is determined by the way in which the spud is gripped.
  • the spud may be considered to be substantially rigidly gripped, because of which the rigidity of the spud lorry construction is relatively great and great loads may occur.
  • the shaft bearings of the lorry are preferably spring mounted.
  • This spring-mounted arrangement may be such that there are two vertical springs on opposed sides of the wheel shaft, which springs are secured to said wheel shaft, these springs are preferably spiral springs.
  • the force of said springs is adjustable. By this it is ensured that the springs can be pre-compressed, as a result of which the lorry will only start tilting when the set precompression is exceeded, i.e., when a given threshold value is exceeded.
  • FIG. 1 shows a diagrammatic, elevational view of the apparatus according to the invention.
  • FIG. 2 shows, in cross section, the position of the apparatus according to the invention when the spud is subjected to a relatively small load.
  • FIG. 3 shows, in cross section, the position of the apparatus according to the invention when the load to which the spud is subjected has exceeded the set threshold value.
  • the reference numeral 1 indicates the lorry which is present in a recess in the stern of the dredger.
  • the lorry 1 can be displaced by means of four wheels 2, the wheels being positioned two by two on a wheel shaft 3.
  • the wheels can be moved along rails 4 which are provided in the wall of the dredger and are shown in FIG. I by chain lines.
  • the lorry l is on the one hand provided with at least one guideway 5 in which a spud 6 is accommodated with some play, while on the other hand the lorry 1 is under the influence of a displacement element 7 of a preferably hydraulic system for controlling the displacement of the lorry I with respect to the dredger. Viz. when operating, the spud 6 is lowered into the spud is deflected beyond the centerline of the spud. In addition to those lateral, normal working loads, the spud 6 is subjected to loads that are caused by the wash of the waves or swell, which loads may originate from various directions.
  • the lorry l is supported in such a way according to the invention that the lorry may be tilted.
  • said tilting capacity is preferably obtained by mounting a resilient element in the zone 9 of the wheel shafts between the lorry frame and the wheel shaft.
  • This element may consist of a pair of vertical, spiral springs 10 which are accommodated in recessed portions 11 in the wall of the lorry. One of each pair of vertical, spiral springs 10 bears on the lower side of the wheel shaft, while the other member of the pair bears on the upper side thereof.
  • the spud will bend and the lorry will make a tilting movement the seabed 8, while during the dredging operation, the dredger is swung about the spud as a fixed point through an angle, the bisector of which coincides with the centerline of the area to be dredged.
  • FIG. 2 shows the position in which only normal working loads will occur.
  • the dredger 12 is displaced with respect to the initial position, which is determined by the spud 6 which is vertically fixed in the seabed 8, over a distance a.
  • the springs 10 are precompressed to such an extent that the lorry I will not make a tilting movement. Because of the displacement of the vessel over the distance a, the spud 6 is deflected to such an extent that the axis of the upper part of the spud will be beyond the central axis of the remainder of the spud.
  • the vessel should be displaced a distance b in addition to the distance a, for instance by the waves and/or the swell, the forces occuring between the lorry I and the spud 6 are so great that the set precompression of the springs 10 will be exceeded by them; the threshold will be exceeded and the lorry 1 will start tilting, whereby the spud will assume a bent shape.
  • a dredger having a spud lorry, means for mounting a spud on the spud lorry, wheel means mounting the lorry for movement on and relative to the dredger, said wheel means including a wheel shaft, and means mounting the lorry on the shaft for movement relative to the shaft in a plurality of directions, and horizontal rails carried by the dredger and disposed above and below said wheel means and along which said wheel means move.
  • said spring means comprising at least a pair of vertical springs that bear against opposite sides of the shaft.
  • a dredger as claimed in claim 3 there being a plurality of said shafts with the lorry spring-mounted on them, there being a pair of said springs adjacent each end of each shaft, there being wheels at each end of each shaft and rails above and below each of said wheels.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Springs (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
US23805A 1969-04-03 1970-03-30 Spud lorry for a floating dredger Expired - Lifetime US3648998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6905248A NL6905248A (enrdf_load_stackoverflow) 1969-04-03 1969-04-03

Publications (1)

Publication Number Publication Date
US3648998A true US3648998A (en) 1972-03-14

Family

ID=19806612

Family Applications (1)

Application Number Title Priority Date Filing Date
US23805A Expired - Lifetime US3648998A (en) 1969-04-03 1970-03-30 Spud lorry for a floating dredger

Country Status (6)

Country Link
US (1) US3648998A (enrdf_load_stackoverflow)
JP (1) JPS4823154B1 (enrdf_load_stackoverflow)
BE (1) BE748368A (enrdf_load_stackoverflow)
FR (1) FR2042910A5 (enrdf_load_stackoverflow)
GB (1) GB1294077A (enrdf_load_stackoverflow)
NL (1) NL6905248A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208979A (en) * 1978-06-16 1980-06-24 The United States Of America As Represented By The Secretary Of The Navy Pontoon spudwell system
EP0019319A3 (en) * 1979-05-14 1981-01-21 Ballast-Nedam Groep N.V. Method of steering a dredger implement and dredger implement
US20100083542A1 (en) * 2008-10-07 2010-04-08 Powers James M Remotely operated submerged dredging system
EP2233645A3 (en) * 2005-06-06 2010-11-10 Dredging International N.V. Apparatus with flexibly mounted spud carriage
NL2008694C2 (en) * 2012-04-24 2013-10-28 Ihc Holland Ie Bv Vessel comprising a spud.
EP2876215A1 (en) * 2013-11-22 2015-05-27 Ondernemingen Jan De Nul, naamloze vennootchap Vessel

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL162164C (nl) * 1974-12-18 1980-04-15 Bos Kalis Westminster Ankerpaalinrichting voor een baggervaartuig.
GB2080208B (en) 1980-06-18 1984-01-04 Neumann Equip Marketing Pty Spud arrangements on dredges
CN104047326A (zh) * 2013-11-27 2014-09-17 卜建余 一种清淤船用轮式台车
US10035309B2 (en) 2014-04-03 2018-07-31 The Boeing Company Radius fillers for composite structures, composite structures that include radius fillers, and systems and methods of forming the same
US10105942B2 (en) 2014-08-20 2018-10-23 The Boeing Company Systems and methods for forming radius fillers for composite structures

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US213899A (en) * 1879-04-01 Improvement in street-cars
US574028A (en) * 1896-12-29 Horace l
US1008102A (en) * 1910-05-04 1911-11-07 Orville E Allen Axle suspension.
US1931708A (en) * 1929-10-31 1933-10-24 Charles F Ross Spring device
US2155521A (en) * 1936-04-23 1939-04-25 Cornelius D Scully Front wheel suspension for motor vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US213899A (en) * 1879-04-01 Improvement in street-cars
US574028A (en) * 1896-12-29 Horace l
US1008102A (en) * 1910-05-04 1911-11-07 Orville E Allen Axle suspension.
US1931708A (en) * 1929-10-31 1933-10-24 Charles F Ross Spring device
US2155521A (en) * 1936-04-23 1939-04-25 Cornelius D Scully Front wheel suspension for motor vehicles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4208979A (en) * 1978-06-16 1980-06-24 The United States Of America As Represented By The Secretary Of The Navy Pontoon spudwell system
EP0019319A3 (en) * 1979-05-14 1981-01-21 Ballast-Nedam Groep N.V. Method of steering a dredger implement and dredger implement
EP2233645A3 (en) * 2005-06-06 2010-11-10 Dredging International N.V. Apparatus with flexibly mounted spud carriage
AU2010202706B2 (en) * 2005-06-06 2012-02-02 Dredging International N.V. Apparatus with flexibly mounted spud carriage
US20100083542A1 (en) * 2008-10-07 2010-04-08 Powers James M Remotely operated submerged dredging system
NL2008694C2 (en) * 2012-04-24 2013-10-28 Ihc Holland Ie Bv Vessel comprising a spud.
WO2013162360A1 (en) * 2012-04-24 2013-10-31 Ihc Holland Ie B.V. Vessel comprising a spud
US9688359B2 (en) 2012-04-24 2017-06-27 Ihc Holland Ie B.V. Vessel comprising a spud
EP2876215A1 (en) * 2013-11-22 2015-05-27 Ondernemingen Jan De Nul, naamloze vennootchap Vessel
BE1021798B1 (nl) * 2013-11-22 2016-01-19 Jan De Nul, Naamloze Vennootschap Vaartuig

Also Published As

Publication number Publication date
GB1294077A (en) 1972-10-25
DE2016533A1 (enrdf_load_stackoverflow) 1970-10-15
FR2042910A5 (enrdf_load_stackoverflow) 1971-02-12
NL6905248A (enrdf_load_stackoverflow) 1970-10-06
JPS4823154B1 (enrdf_load_stackoverflow) 1973-07-11
DE2016533B2 (de) 1977-04-07
BE748368A (nl) 1970-10-02

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