Trailing suction hopper dredgers (TSHD) are used for the excavation and transportation of materials such as sand, gravel and silt. They can be found operating in projects around the world, including harbour construction, channel maintenance, coastal protection, beach renourishment and land reclamation.
Properties
A trailing Suction Hopper Dredger is self-loading/unloading and sometimes equipped with a pressurized discharging system.
Loading
From the side of the ship one or two suction pipes descend to the bottom of the seabed. On the end of the pipe a so-called trailing Drag Head is connected. This head is comparable to a large vacuum cleaner and is trailed along the seabed. In the head there are nozzles connected to a high pressure water installation that are capable of loosening the material on the seabed. Due to lower pressure in the pipe, the material will be sucked inward and discharged in the hopper.
The vessel should always have a positive speed over the ground. It is possible to regulate the density of the sucked substance. If the head is lowered, more material will be sucked but there is a greater possibility of damaging the installation because the material can get stuck inside the pipes. Once the mixture is loaded inside the hopper, the substance will sink and the water is discharged overboard, creating more room for extra substance. A trailing suction hopper Dredger is only capable to suck relatively loose substance because the steel teeth are not so big. Harder substances such as rock, or ironbased rock must be destroyed by a cutter.
Our service
Besides above the general specifications, we can also supply some specific dredgers and parts and other similar steel structure as clients' requirements.
Package and shipping
bulk package and bulk vessel transportation
Certificates
- Material certificates by a classification society
- Inspection protocol
- Inspection reports tank testing
- NDT reports
- Official certificates for accessories and other equipment
- Fixed certificate: ISO9001, BV certificate, CCS certificate
Company information
UniSite group was established in a strategic location, Chinese second largest port, Ningbo, which is characterized by visible leadership, vitality, innovation, long-term vision and a sound financial position.
As an international partner, we are specialized in providing comprehensive service of dredging, land reclamation, offshore projects, marine engineering, municipal engineering and environmental remediation projects.
Besides our own production base and technology system, we also have strategic partnerships with DONGPENG shipyard, a leading producer of chemical vessels in China.UniSite group was established in a strategic location, Chinese second largest port, Ningbo, which is characterized by visible leadership, vitality, innovation, long-term vision and a sound financial position.
As an international partner, we are specialized in providing comprehensive service of dredging, land reclamation, offshore projects, marine engineering, municipal engineering and environmental remediation projects.
Besides our own production base and technology system, we also have strategic partnerships with DONGPENG shipyard, a leading producer of chemical vessels in China.
location of head office and two plants
Photos of our Trailing suction hopper dredger design
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Product Categories : Dredger > Trailing Hopper Suction Dredger
