Dredging sizes are determined through its particular purpose. Dredging is carried out to either create or to deepen a harbor or sea vessel ways. The activity is also accomplished to set the foundation of bridges, to reclaim land from the seabed or from flooding, and beach restoration. The most common dredging vessels used today are three of the suction types.
Among the trailing suction hopper dredgers (TSHD) today, the largest is currently Jan De Nul's Cristobal Colon which was launched on July 4, 2008. The dredging sizes for the 47,000 gigatonne vessel would be large in scale. The 223 meter long vessel is equipped with two suction pipes that have a diameter of 1,300 millimeters. It is equipped with electrically driven underwater dredge pumps having a power of 6,500 kilowatts each. The dredge can reach depths of up to 155 meters through three configurations of suctions pipes. One suction pipe is for standard depths, one is for normal deep depths up to 80 meters, and one reaches all the way to 155 meters.
The family-owned Belgian company also built the Leiv Eriksson. The sister ship shares the same design specifications as its sister ship. Dredging sizes, therefore, for both dredging vessels would fall under the super large scale. The next largest TSHD is Van Oord's HAM 318. The vessel has a 37,293 cubic meter hopper and can reach a maximum dredging depth of 101 meters.
Another kind of suction dredging vessel is the cutter-suction dredger (CSD). The DEME Group has one of two of the largest cutter suction dredgers in the world. Its D'Artagnan measures 123.80 meters in length. The 28,200 kilowatt powered vessel could closely match the dredging sizes of the two largest TSHDs because of its 1,000 millimeter in diameter suction pipe. D'Artagnan, however, could only sustain dredging depths between six to 35 meters. Forty three persons man the dredging vessel that reaches a maximum speed of 12.50 knots.
Small dredging sizes for sludge removal applications from waste water treatment plants, in the meantime, are performed through auger suction-type vessels. Liquid Waste Technology, LLC. has the Mud Cat 737 275HP. The diesel-driven auger dredge is the largest in the series. It has a maximum digging depth of 15 feet (4.57 meters). The entire vessel has dimensions of 42 feet (12.8 m.) x 9 feet 5 inches (2.86 m.) x 9 feet 4 inches (2.84 m.). Its dredge pump can make dredging sizes starting at eight inches (152 millimeters) in diameter.
Among the trailing suction hopper dredgers (TSHD) today, the largest is currently Jan De Nul's Cristobal Colon which was launched on July 4, 2008. The dredging sizes for the 47,000 gigatonne vessel would be large in scale. The 223 meter long vessel is equipped with two suction pipes that have a diameter of 1,300 millimeters. It is equipped with electrically driven underwater dredge pumps having a power of 6,500 kilowatts each. The dredge can reach depths of up to 155 meters through three configurations of suctions pipes. One suction pipe is for standard depths, one is for normal deep depths up to 80 meters, and one reaches all the way to 155 meters.
The family-owned Belgian company also built the Leiv Eriksson. The sister ship shares the same design specifications as its sister ship. Dredging sizes, therefore, for both dredging vessels would fall under the super large scale. The next largest TSHD is Van Oord's HAM 318. The vessel has a 37,293 cubic meter hopper and can reach a maximum dredging depth of 101 meters.
Another kind of suction dredging vessel is the cutter-suction dredger (CSD). The DEME Group has one of two of the largest cutter suction dredgers in the world. Its D'Artagnan measures 123.80 meters in length. The 28,200 kilowatt powered vessel could closely match the dredging sizes of the two largest TSHDs because of its 1,000 millimeter in diameter suction pipe. D'Artagnan, however, could only sustain dredging depths between six to 35 meters. Forty three persons man the dredging vessel that reaches a maximum speed of 12.50 knots.
Small dredging sizes for sludge removal applications from waste water treatment plants, in the meantime, are performed through auger suction-type vessels. Liquid Waste Technology, LLC. has the Mud Cat 737 275HP. The diesel-driven auger dredge is the largest in the series. It has a maximum digging depth of 15 feet (4.57 meters). The entire vessel has dimensions of 42 feet (12.8 m.) x 9 feet 5 inches (2.86 m.) x 9 feet 4 inches (2.84 m.). Its dredge pump can make dredging sizes starting at eight inches (152 millimeters) in diameter.
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