The first of five tunnel boring machines (TBMs) that will drive 155km of twin tunnels for a new metro system in Sydney, Australia has been delivered.
The Herrenknecht TBM arrived at main contractor John Holland CPB Ghella joint venture’s Marrickville launch site in eight shipping containers and 23 other separate pieces.
The 1,100t TBM will be assembled on site and is expected to start work on boring the 8.km tunnel towards Waterloo Station and Barangaroo before the end of the year.
Another TBM will be delivered to complete the twin tunnel from Marrickville, while two other TBMs will drive the 6.2km tunnels from Chatswood to the edge of Sydney Harbour. A fifth TBM will be used to drive both bores of the 1km tunnels below the harbour.
The project is the first in Australia to use five TBMs concurrently. All have been manufactured by Herrenknecht.