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Home > Second Sydney breakthrough achieved

Second Sydney breakthrough achieved

Tris Thomas

Written by Tris Thomas on 19/03/2015 in News

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Florence, the second massive TBM on Sydney’s North West Rail Link broke through into the new Norwest Station area early this month. All four 6.99m diameter NFM Hard Rock TBMs, being operated by the the Thiess John Holland Dragados joint venture are now in the ground ahead of schedule and have dug more than 6km of their 30km journey on the A$1.5bn tunnelling contract.

So far, more than 550,000 tonnes of crushed rock has been excavated by the four TBMs for the twin 15km tunnels from Bella Vista to Epping. Over the coming weeks, Florence will undergo maintenance as she is moved through the Norwest station area, before setting off again towards Showground station as the other three machines Elizabeth, Isabelle and Maria continue their work.

Contract completion is expected in 2017. The contract also includes excavation and civil works for five new stations at Cherrybrook, Castle Hill, Showground, Norwest and Bella Vista, and two service facilities

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