The big CRL excavation work along Albert Street continues
From above - latest drone video
The bulk excavation, taking place in Albert Street, is challenging work for CRL engineers.
What are they doing?
They must construct rail tunnels below groundwater level while maintaining surface-level access to Albert Street for foot and vehicle traffic.
How are they doing it?
The excavation involves digging 18 metres at the deepest point, using long-reach excavators above ground and smaller machinery inside the reinforced trench. The tunnels will then be constructed with a cast concrete floor, walls and roof before the trench is backfilled.
Where is it going?
The work is being undertaken progressively from Wyndham St at the southern end to Customs St at the northern end.
When will it be finished?
Construction of the tunnel box is expected to start late this year and be completed by late 2018. By spring 2019, this section of Albert St will be reinstated with a new road surface, bus lanes, widened footpaths and street furniture.