TRAILING SUCTION HOPPER DREDGER (TSHD)
Up to 8,000 m3
The TSHD is a common vessel that does offshore dredging work for a certain purpose including artificial islands, increasing the depth of shallow canals and other offshore activities. The vessel is propelled by a diesel engine through a Controllable Pitch Propeller.
Professional Shipyard DGS has experience in building special-purpose vessels including trailing suction hopper dredgers with a hopper capacity of up to 8,000 m3. Such vessels require engineering expertise since the equipment onboard does mainly heavy-duty work. This includes dredging pumps, and suction rainbowing, in addition to the control system for dredging operation.
The vessel consists of 12 bottom doors for material dumping where all doors can be remotely controlled and displayed on the wheelhouse. It also includes a suction system, and jet pumps (water flow: 3,000m3/hr), onboard dredging pumps 10,000m3/hr). The dredging system is run by the dredging engine usually located at the fore of the vessel since the main engine role is to drive the ship forward while the dredging engine’s role is to supply the dredging pumps and dredging system in general with adequate power.
A TSHD is in general deployed for the mining and hauling of granular materials and the dredging of soft to firm clays. Also, it is commonly used for dredging silty, sandy or gravely soils or soft clayey soils and stores them in a cargo hold, called the hopper, while all other types of dredgers require a barge to store or transport the mud and clays.
Conventional hopper dredging activities can be divided into the following consecutive activities: loading (dredging), sailing loaded, unloading, and sailing back empty. A complete set of these four activities is called a dredging cycle.
Principal Particulars ( 8,000 m3 )
- Length Overall: 130m
- Breadth: 23.5m
- Depth: 10m
- Draft: 8m
- Deadweight: 12,900 T
- Service Speed: 14 knots
Principal Particulars ( 6,000 m3 )
- Length Overall: 112.80m
- Breadth: 19.83m
- Depth: 8.6m
- Draft: 7.5m
- Deadweight: 8,900 T
- Service Speed: 12 knots
