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Nanjing Metro
China, Nanjing
2002 – today

Herrenknecht technology was involved from the beginning, when the first metro line was built in Nanjing. The first three EPB Shields for the construction of 6.5 kilometers for Line 1 worked from 2002 to 2003. Since then, another 23 EPB Shields have contributed to the new construction of Line 2, 3, 4, 7 and 10 and the extension of Line 1.

To cross beneath the Yangtze River, the metro constructors chose Mixshield technology from Schwanau. The Mixshields had diameters of 11.5 and/or 11.6 meters making it possible to accommodate the metro lines in one tube, which had otherwise led through single-track tunnels.

The latter (S-668) became well known and was nicknamed "The Flying Dragon", after it impressed the site crew of metro Line 10 with advance rates of up to 240 meters per week. The alignment here runs over a length of 3.6 kilometers and at a depth of up to 58 meters below the surface of the Yangtze River. Tunnel and machine were subjected to soil and water pressure of up to 6.5 bar.

Nanjing Metro

  • Total tunnelling length: 60,453m
  • 21 x EPB Shields
  • Diameter: 6,390mm - 6,450mm
  • Cutting wheel power: 630kW - 945kW
  • Torque: 2,309kNm - 6,228kNm
  • 2 x Mixshields
  • Diameter: 11,570mm + 11,610mm
  • Cutting wheel power: 2,750kW
  • Torque: 16,415kNm
Data Sheet

Country, Location

China, Nanjing

Year

2002 – today

Application

Metro

Geology

Soft ground
Heterogeneous ground
Sand, clay, loam, silt, rock, sandstone, claystone

Tunnelling length

69,353 m

Machine Data

6x EPB Shield:
Diameter: 6,390 mm
Lining method: Segmental lining

6x EPB Shield:
Diameter: 6,410 mm
Lining method: Segmental lining

10x EPB Shield:
Diameter: 6,450 mm
Lining method: Segmental lining

1x EPB Shield:
Diameter: 6,850 mm
Lining method: Segmental lining

1x Mixshield:
Diameter: 11,570 mm
Lining method: Segmental lining

1x Mixshield:
Diameter: 11,610 mm
Lining method: Segmental lining

Your contact person Contact us

Jack Brockway President and CEO Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser COO Herrenknecht Tunnelling Systems USA, Inc.