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Circle Line
Singapore
2003 – 2009

The infrastructure planners and contractors make huge efforts to keep pace with the city state's population and economic growth. The large-scale metro project "Circle Line" has a length of 33.3 kilometers. Shaped like a circle and with a total of 26 stations, the Circle Line runs once around downtown Singapore and connects all other metro lines.

Tunnel boring machines by Herrenknecht were used along eleven sections: nine EPB Shields and two Mixshields. The EPB Shields' working principles proved of value in Singapore's underground, characterized by a low permeability. The two Mixshields were employed on the three-kilometer-long section between One-North and Farrer Road. The last EPB Shield successfully completed its drive for the Circle Line in March 2009. In October 2011 the new line was put into operation.

Circle Line Singapore

Data Sheet

Country, Location

Singapore, Singapore

Year

2003 – 2009

Application

Metro

Geology

Soft ground
Heterogeneous ground
Marine clay, alluvium, sand, weathered granite, boulders, clay, sandstone (Jurong Formation)

Tunnelling length

23,758 m

Machine Data

2x EPB Shield:
Diameter: 6,580 mm
Lining method: Segmental lining
Cutterhead power: 945 kW
Torque: 4,180 kNm

2x EPB Shield:
Diameter: 6,580 mm
Lining method: Segmental lining
Cutterhead power: 1,600 kW
Torque: 4,470 kNm

2x EPB Shield:
Diameter: 6,600 mm
Lining method: Segmental lining
Cutterhead power: 945 kW
Torque: 4,570 kNm

3x EPB Shield:
Diameter: 6,600 mm
Lining method: Segmental lining
Cutterhead power: 1,200 kW
Torque: 4,475 kNm

2x Mixshield:
Diameter: 6,600 mm
Lining method: Segmental lining
Cutterhead power: 2,000 kW
Torque: 4,045 kNm

Your contact person Contact us

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