TBM Breakthrough Marks Completion of Sydney Metro Tunnelling
Tunnel Boring Machine Kathleen broke-through to Blues Point last week marking the completion of tunnelling for the Sydney Metro project.
Named after Kathleen Butler, who played a vital role in building the Sydney Harbour Bridge, the TBM completed twin tunnels, each one 885 metres long and up to 40 m below sea level from Barangaroo to Blues Point.
This marks the completion of a total of 31 kilometres of tunnels delivered by 5 TBMs for the Sydney Metro project.
But the occasion wasn’t celebrated with the usual fanfare as ministers are busy dealing with a health crisis.
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The innovative crane system allowed Hutchies to comply with aviation requirements by encroaching into aircraft airspace during the day and lowering the crane at night below the maximum permitted height.
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