1.Introduction
A cutter-suction dredger's (CSD) suction tube has a cutting mechanism at the suction inlet. The cutting mechanism loosens the bed material and transports it to the suction mouth. The dredged material is usually sucked up by a wear-resistant centrifugal pump and discharged either through a pipe line or to a barge. Cutter-suction dredgers are most often used in geological areas consisting of hard surface materials (for example gravel deposits or surface bedrock) where a standard suction dredger would be ineffective. In recent years, dredgers with more powerful cutters have been built in order to excavate harder rock without the need for blasting.

2.Specification

Item	Parameter
Total Length	34m
Side Pontoon Length	24m
Pontoon Height	1.8m
Total Width	6.2m
Total Power	1400KW (Diesel engine )
Subsidiary Power	50kw
Cutter head Diameter	1.5m
Cutter Head Power	90kw
Sand Pump	18/16G-S
Suction Pipe Diameter	Inner Diameter 460mm
Discharge Pipe Diameter	Inner Diameter 410mm
Digging Depth	16m
Capacity	2500m³/h
Discharge Distance	1200m
Sand Output	500m3/h
Spud Diameter	∮450mm,(2 sets)
Winch	3 sets