Xin Zi Lang 8

According to ZPMC, this vessel boasts an exceptionally large hold capacity, deep digging capability, high sailing speed, and low operational costs.

It is the first self-propelled trailing suction hopper dredger in China to utilize a distributed cabin pump design, making it ideal for deep-sea sand extraction, dredging in coastal deep-water port channels, land reclamation, and coastal maintenance projects.

Equipped with a new generation of intelligent monitoring and management platform independently developed in China, the vessel achieves smart monitoring and comprehensive management, with its intelligent functions meeting world-class standards.

Upon completion, it will facilitate efficient construction in large-scale integrated “dig, dump, and land reclamation” infrastructure projects.

Trailing Suction Hopper Dredger
Built Year 2024/2025
Class: CCS, CSA Trailing Suction Dredger,
Dredging within Rl,DP-1
AUT-0; G-EP(OILl,SC,RC,NEC2,INC,RSC1,AFS):
G-ECO(BWM(T))
Function: taking deep sea sand, coastal ports and deep water channel dredging, land reclamation and coastal maintenance
Navigation: unrestricted and dredging in coastal area.
Length over all approx. 171.20 m
Length between perpendiculars 160.00 m
Breadth, moulded 36.00 m
Depth, moulded 15.80 m
Draft at International Freeboard 9.50 m
Draft at Dredging Mark 11.5 m
Mud capacity at draft 11.5m approx.40300 t
Deadweight at draft 11.5m approx.41930 t
Max. Hopper Capacity approx.26800 m3
Suction Pipe Diameter 1200mm
Dredging Depth 40/70/115 m
Speed at draft ~13. 5 kn
Complement 40 P
Total installed power 26389 kW
Main diesel engines MAN 2*7200 kW
Main shaft generators ABB 2*7000 kW
Dredging generator MAN+ABB 1*7200 kW
Auxiliary/harbor generator CAT 2*2095 kW
Emergency/harbor generator CAT l* 599 kW
Inboard dredge pump HK 2*6000 kW
Under water pumps HK+BAKKER 2*3300 kW
Jet water pumps CCCC 2*2000 kW
Bow thrusters Wartsila 2*1100 kW
Stem thruster Wartsila 1*1100 kW
Dredged Soil Texture
Dredging mud, clay, fine silty sand, medium fine
sand, coarse sand ,gravel and pebble:
Clay: Ip>17 Fine silty sand: d50%=0.0lmrn, density
(volume-weight)= 1.86 t/m3
Medium fine sand: d10%=0.31mm, d50%=0.23mm, d90%=0.16mm, without mud density (volume-weight)= 1.95 t/m3 (the sand pores are filled with water) Coarse sand: d50%=0.50mm
Grave land pebble: d50%=20mm

Loading
1 The dredged soil texture is medium fine sand: the calculated effective loading time is about 90 minutes when the two drag heads dredge down to 20m.This loading time is calculated on the basis that both the two inboard dredge pumps are put into use, the average density of the soil into the hopper is 1,300kg/m3, and the average overflow ratio is 8%
2 The dredged soil texture is medium fine sand: the calculated effective loading time is about 70 minutes when the two drag heads dredge down to 40m.This loading time is calculated on the basis that both the two under water pumps are put into use, the average density of the soil into the hopper is 1,320kg/m3, and the average overflow ratio is 8%.
3 The dredged soil texture is medium fine sand: the calculated effective loading time is about 90 minutes when the two dragheads dredge down to 40m.This loading time is calculated on the basis that both the two under water pumps are put into use, the average density of the soil into the hopper is 1,270kg/m3, and the average overflow ratio is 8%.
4 The dredged soil texture is medium fine sand: the calculated effective loading time is about 140 minutes when the single draghead dredge down to 115m. This loading time is calculated on the basis that single dredge head, the starboard underwater pumps are put into use, the average density of the soil into the hopper is 1,270kg/m3, and the average overflow ratio is 8%.

Pumping ashore
When discharging above described mixture through a pipeline of 4000 m length (not including discharge line on board) by both inboard pumps working in series, the unloading time for 26000 m3 of sand is calculated at approx. 14 7 minutes.
This time is based on a discharge pipeline diameter of 1000 mm, a geodetic height of 6 m, and the ashore density is 1350 kg/m3.
In this case the power for the inboard dredge pumps can reach to 5800 kW each.
When both inboard pumps working in series, the ashore distance can reach to 5000m.