Barge Loading Reflux Pump-Type Dredging Construction Method
The Chiyoda Maru is a barge loading reflux pump-type dredger designed to recycle dredged soil and protect the environment. In conventional barge loading-type pump dredgers, the surplus water (slurry) generated by the earth-carrying barge was released directly onto the sea. In contrast, the reflux pump-type returns the surplus water to the pump ship cutter (sea bottom excavation surface) by forcible discharge. This minimizes the spread of turbidity in the surrounding waters. Moreover, because the seabed is dredged by layer, the dredged soil can be used as an environmental recycling material in environmental improvement works such as marine sand-capping projects and artificial beach construction, and as backfill soil when widening embankments behind revetments.
General view of the Chiyoda Maru
Suction of surplus water by reflux pump
Release of surplus water in conventional barge loading method
- Minimizes spread of turbidity to surrounding waters by forced return of surplus water.
- Dredging of the seabed by layer enables effective utilization of dredged soil in environmental improvement works such as marine sand-capping, artificial beach construction, and embankment widening behind revetments.
- Use of a net to exclude lumps of soil prevents mixing of masses of cohesive soil, boulders, etc. contained in the ground.