Zhengzhou Metro Line 1

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Location

Zhengzhou, China

Scope of Supply

2 x 6.2 m (20.2 ft) EPB TBMs

Tunnel Length

2 x 3.6 km (2.2 mi)

Ground Condition

Clay, Fine Sand, Loess, Pebbles

 

Record Rates in China’s Soft Ground

  • In September 2010, EPBs were launched to bore part of Zhengzhou’s first metro line
  • In 2011, a project record was achieved for excavating 720 m (2,360 ft) in one month
  • Both machines completed excavation on time in Autumn 2011