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Vuyk Engineering Rotterdam B.V. Naval architects, Marine engineers, Consultants P.O. Box 1, De Linie 7 2900 AA Capelle aan den IJssel Phone +31 (0)10 450 25 00 Fax +31 (0)10 458 72 45 Email [email protected] Website www.vuykrotterdam.com Values are for presentation only Principal dimensions 76,02 m 72,50 m 14,50 m 5,00 m 4,57 m Description of system Length overall Length b.p.p. Breadth moulded Depth moulded Draft at dredging mark Hopper capacity Hopper load Suction pipe diameter Dredging depth, maximum VER project 07.021 Hydraulic crane split hopper dredger VLAANDEREN XXI Introduction The split hopper dredger ’Vlaanderen XXI’ is frequently engaged in gravel dredging with delivery of the gravel to various North Sea ports between Le Havre, France and Flushing, The Netherlands. For unloading in the various ports, the Operational Manager used its own mobile hydraulic crane, traveling by road between these ports. This became highly unpractical, therefore the Belgian owner DEME decided to equip the vessel with its own hydraulic crane. Capacity To install the Sennebogen hydraulic crane with grab, Vuyk Engineering Rotterdam was ordered to redesign the deck area for the conversion. Due to the split hopper discharge system, the crane support had to be placed on one side of the hopper and as close as possible to the centre line of the vessel. A construction was created in the centre of the hopper area to support the crane foundation on SB side. The existing overflow duct had to be relocated to the centre of the hopper. To avoid contact between the crane and overflow duct during splitting, the overflow was also placed on the SB side. The large hole in the construction, serving as crane foundation warranted a FEM calculation to ensure the necessary strength in all directions. 1 635 m‡ 2 289 t 650 mm 33,00 m
