Sydney’s new twin metro railway tunnels are now 70% complete as tunnelling reaches the heart of the city deep under Martin Place. TBM Nancy has arrived at the new Martin Place Station, 28 m under Sydney. After just 11 months of tunnelling, 22 km of the Sydney Metro tunnels are now finished.

Since launching in October 2018, TBM Nancy has tunnelled 6.8 km via the new metro stations at Waterloo, Central and Pitt Street. TBM Nancy will spend a few weeks undergoing maintenance before being re-launched to complete the last 1.3 km section between Martin Place and Barangaroo.  It has taken about 21 months to build the caverns for the new Martin Place Station ahead of TBM Nancy’s arrival, removing about 198,000 t of rock.

Click here and au/11 for the  tunnelbuilder archive and visit https://www.sydneymetro.info. 41/19.