Trailing Suction Hopper Dredgers (TSHD)
Trailing Suction Hopper Dredgers may be deployed in situations where a pipeline between dredging area and depositing area is not possible or economic, where soil characteristics are permitting this. TSHD typically have less cutting force available for cutting the soil, although present developments of techniques have made TSHD much more powerful in this matter. A Trailing Suction Hopper Dredger loads its hold with one or two suction pipes while slowly sailing. Thus dredging a relatively thin but lengthy layer of soil from the water bottom. Although the production of TSHD is not continuous (the production cycle exists in: dredging-sailing-discharging-sailing), the overall-production can be high when all circumstances are right. But various disruptions may occur and hinder high production being effected. Acquiring Trailing Suction Hopper Dredgers demands high investments. TSHD can be constructed for specific working areas like maintenance dredging, sand mining or aggregate dredging, although overlaps are possible and likely.