Rock Dumping Vessels
2
Rock-dumping vessels The stone dumping vessel Berghaus on the River Elbe in front of Cuxhaven. Rock-dumping vessels are a category of watercraft that exist for the purpose of dumping rocks on the seabed. They are able to transport and dump rocks of variable sizes. The vessels range from large bulk-carrier style ves- sels, able to carry out precision operations using fallpipes, to smaller deck-loading vessels mainly used for erosion remediation. [1][2][3] Almost all such vessels are fitted with a dynamic position- ing system, which makes it possible to position rocks very accurately. [4] Large cranes or fall pipes are used to dump the rocks from the vessels. Side-discharging by means of crane is usually done in shallow waters, while fall pipes are more com- monly used in deep-water rock-dumping operations. The most common need for rock dumpers is to provide protection to previously laid pipelines in areas where they may be damaged by fishing gear. Pipelines at risk are not trenched, but remain on the surface of the seabed. There are a number of protection methods for such pipelines, in- cluding the placement of concrete mattresses, but for ar- eas where a long distance of pipeline has to be protected, a rock-dumping operation may be most cost efficient. [5] Eclogite is often used because of its high density. The Belgian dredging companies Jan De Nul and DEME's Tideway subsidiary are two of the best-known global providers of rock-dumping operations. [6][7][8] 1 Applications • Protection of sub-sea infrastructures [9] • Thermal isolation of pipelines [9] • Leveling of the seabed prior to installing platforms, caissons, etc. [9] 2 See also • Coastal erosion • MV Rocknes 3 References [1] http://www.rockdumping.eu/indexE.html [2] http://www.offshore-technology.com/projects/ malampaya/malampaya7.html [3] “New Rock Dumping Record Established by Van Oord”. Maritime Journal. 1 May 2004. Retrieved 5 January 2013. [4] http://www.km.kongsberg.com/ks/web/nokbg0240.nsf/ AllWeb/14E17775E088ADC2C1256A4700319B04 [5] http://www.marin.nl/web/Ships-Structures/ Special-purpose-vessels/Rock-Dumping-Vessel.htm [6] “More offshore contracts for Jan de Nul”. Maritime Jour- nal. 6 September 2012. Retrieved 6 January 2013. [7] Castle, Jemma (6 November 2012). “Jan De Nul and Tideway win Wheatstone dredging contract”. Lloyd’s List Australia. Retrieved 6 January 2013. [8] “Dutch Tideway Buys Amarcon’s OCTOPUS-Onboard for Rock Dumping Vessel”. World Maritime News. 3 April 2012. Retrieved 6 January 2013. [9] http://www.rockdumping.eu/purposeE.html 1
description
Rock Dumping Vessels, Subsea Installation, Foundation Seabed
Transcript of Rock Dumping Vessels
-
Rock-dumping vessels
The stone dumping vessel Berghaus on the River Elbe in front ofCuxhaven.
Rock-dumping vessels are a category of watercraft thatexist for the purpose of dumping rocks on the seabed.They are able to transport and dump rocks of variablesizes. The vessels range from large bulk-carrier style ves-sels, able to carry out precision operations using fallpipes,to smaller deck-loading vessels mainly used for erosionremediation.[1][2][3]
Almost all such vessels are tted with a dynamic position-ing system, which makes it possible to position rocks veryaccurately.[4]
Large cranes or fall pipes are used to dump the rocks fromthe vessels. Side-discharging by means of crane is usuallydone in shallow waters, while fall pipes are more com-monly used in deep-water rock-dumping operations.The most common need for rock dumpers is to provideprotection to previously laid pipelines in areas where theymay be damaged by shing gear. Pipelines at risk are nottrenched, but remain on the surface of the seabed. Thereare a number of protectionmethods for such pipelines, in-cluding the placement of concrete mattresses, but for ar-eas where a long distance of pipeline has to be protected,a rock-dumping operation may be most cost ecient.[5]
Eclogite is often used because of its high density.The Belgian dredging companies Jan De Nul andDEME's Tideway subsidiary are two of the best-knownglobal providers of rock-dumping operations.[6][7][8]
1 Applications Protection of sub-sea infrastructures[9]
Thermal isolation of pipelines[9]
Leveling of the seabed prior to installing platforms,caissons, etc.[9]
2 See also Coastal erosion MV Rocknes
3 References[1] http://www.rockdumping.eu/indexE.html
[2] http://www.offshore-technology.com/projects/malampaya/malampaya7.html
[3] New Rock Dumping Record Established by Van Oord.Maritime Journal. 1 May 2004. Retrieved 5 January2013.
[4] http://www.km.kongsberg.com/ks/web/nokbg0240.nsf/AllWeb/14E17775E088ADC2C1256A4700319B04
[5] http://www.marin.nl/web/Ships-Structures/Special-purpose-vessels/Rock-Dumping-Vessel.htm
[6] More oshore contracts for Jan de Nul. Maritime Jour-nal. 6 September 2012. Retrieved 6 January 2013.
[7] Castle, Jemma (6 November 2012). Jan De Nul andTideway win Wheatstone dredging contract. Lloyds ListAustralia. Retrieved 6 January 2013.
[8] Dutch Tideway Buys Amarcons OCTOPUS-Onboardfor Rock Dumping Vessel. World Maritime News. 3April 2012. Retrieved 6 January 2013.
[9] http://www.rockdumping.eu/purposeE.html
1
-
2 4 TEXT AND IMAGE SOURCES, CONTRIBUTORS, AND LICENSES
4 Text and image sources, contributors, and licenses4.1 Text
Rock-dumping vessels Source: http://en.wikipedia.org/wiki/Rock-dumping%20vessels?oldid=617970701 Contributors: Andrew-man327, Manxruler, Bazonka, Biscuittin, Excirial, Goulu, Citation bot, Hobbes Goodyear, Zandcee, Cyberbot II, JZP709 and HHarold
4.2 Images File:Stone_dumping_vessel_Berghaus.jpg Source: http://upload.wikimedia.org/wikipedia/commons/a/ad/Stone_dumping_vessel_
Berghaus.jpg License: Public domain Contributors: Own work Original artist: Tvabutzku1234
4.3 Content license Creative Commons Attribution-Share Alike 3.0
ApplicationsSee alsoReferences Text and image sources, contributors, and licensesTextImagesContent license
