24
Jun

Sydney Metro Northwest reaches the halfway mark

24.06.2015

Florence, the second of our four tunnel boring machines, has broken through into Showground Station.

Florence, the second of our four tunnel boring machines (TBMs), has broken through into Showground Station. In tunnelling to Showground from Bella Vista and via Norwest station, TBM2 Florence has:

  • Excavated more than 425,500 tonnes of crushed rock, both sandstone and shale;
  • Installed more than 14,832 concrete segments to line the new rail tunnel;
  • Been a workplace to more than 60 workers, including tunnellers, maintenance crews, geologists, surveyors and engineers, who combined have  spent almost 65,000 hours underground;
  • Had 341 hardened steel cutters on her cutter head replaced, worn down from the harsh forces of cutting the Sydney sandstone and shale;
  • Had its conveyor belt extended by almost 8.8 kilometres so the crushed rock can be transported back to Bella Vista.

Sydney Metro Northwest is delivering Australia’s longest railway tunnels – twin 15 kilometre tunnels from Bella Vista to Epping.

TBM1 breaks through at Showground

TBM2 is on her way to Castle Hill

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