Chennai Metro, Line 1

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Location

Chennai, India

Scope of Supply

6.65 m (21.8 ft) EPB TBM

Tunnel Length

2 x 1.0 km (0.6 mi)

Ground Condition

Granite, Sand, Silt, and Clay with boulders up to 300 mm (12 in) in diameter

 

Indian EPB Fitted for Mixed Ground Conditions

  • The mixed ground cutterhead design utilizes a combination of 17-inch diameter disc cutters as well as soft ground tools
  • Specialized, small grippers located around the circumference of the machine's shield allow for cutterhead stabilization in harder ground
  • Chennai, a city of 8.2 million people, has commissioned two new rail lines to help with traffic congestion, totaling 45.1 km (28.0 mi) in length