West Qinling Rail Tunnels

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Location

Gansu Province, China

Scope of Supply

2 x 10.2 m (33.5 ft) Main Beam TBMs, 2 Continuous Conveyor Systems

Tunnel Length

2 x 16.6 km (10.3 mi)

Ground Condition

Sandstone, Phyllite

 

High Cover Tunneling with Novel Ground
Support in Mountainous Terrain

  • Two TBMs achieved world records in their size class, excavating 235 m (771 ft)/week and 841.8 m (2,761 ft)/month
  • TBM jobsite is located approximately 1,000 m (3,280 ft) above sea level in the mountains
  • The TBMs were designed with mesh installation windows in the protective roof shield
  • Automated materials handling for safe and effective tunneling