Community takes fight for rail to the Supreme Court
Rail corridor between Glenfield and Macarthur earmarked for medium density
Rail Trail boost to tourism - and local economy
Newcastle rail case may be long wait
Save Our Rail questions semantics argument over rail line cut
North West Rail Link corridor to extend through to Marsden Park
Camurra West to Weemelah Line Booked Out of Use
Rail Trail full steam ahead
John Holland Commissions Electronic Train Orders
Closure of Newcastle rail stations not technically a closure of whole line, State Government lawyer says
It was a historic moment that passed Sydney by.
Without any public fanfare, a giant tunnel boring machine named Kathleen has completed digging the first rail tunnel under Sydney Harbour for a new metro train line.
The tunnel boring machine has been barged back to Barangaroo, where an underground station is being built.CREDIT:WOLTER PEETERS
So unremarked has been the occasion that Kathleen has already been pulled to the surface up a deep shaft on the harbour's edge at Blues Point, on the lower north shore, and barged back to where she began her journey at Barangaroo, on the western edge of the CBD.
In the coming weeks, the 130-metre boring machine will start on the second parallel tunnel.
The twin kilometre-long tunnels under the harbour are one of the most complex parts of the second stage of Sydney's metro rail line from Chatswood to central Sydney, and onto Bankstown. The first stage from Rouse Hill in Sydney's north-west to Chatswood opened in May.
Sydney transport planner Mathew Hounsell said the use of a specialised tunnel boring machine to bore under the harbour was a "very significant" engineering achievement.
Tunnel boring machine Kathleen being assembled at the site of the new Barangaroo metro station before she started tunnelling under the harbour.
"It is a significant milestone in Australian history. It demonstrates that we are capable of delivering major infrastructure projects like other countries - but it is not a world beater," he said.
He cited the 57-kilometre Gotthard tunnel under the Swiss Alps – the world's longest and deepest rail tunnel, which opened in 2016 – as an example of an extraordinary engineering feat.
Named after Kathleen Butler, who served as a technical adviser to renowned engineer John Bradfield on the construction of the Harbour Bridge, the boring machine is specially equipped to tunnel through water-saturated sandstone and sediment.
This article first appeared on www.smh.com.au
About this website
Railpage version 3.10.0.0037
All logos and trademarks in this site are property of their respective owner. The comments are property of their posters, all the rest is © 2003-2020 Interactive Omnimedia Pty Ltd.
You can syndicate our news using one of the RSS feeds.