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Author(s):	Och, David J.; Bateman, Geoff; Maidl, Ulrich; Comulada, Marc
Title:	Sydney Metro - ground characterisation and TBM selection for the Sydney Harbour crossing
Abstract:	The Sydney Harbour crossing is a key element of Sydney Metro City & Southwest, which includes 15.5 km of twin tube running tunnels extending from Chatswood at the north through to Sydenham, south of the Central Buisness District (CBD). One of the key features is the 1 % length of the alignment that passes under Sydney Harbour. The rest of the alignment is through rock, but the harbour crossing is designed to pass through harbour sediments and mixed face conditions undersea. An in depth study and analysis was required to confirm the feasibility of the safe construction of this short length of the tunnel in sub-aqueous, soft ground conditions. It was necessary to carry out detailed, targeted investigation of the ground to enable the selection of an appropriate tunnelling technique for constructing the tunnels.
Source:	Geomechanics and Tunnelling 11 (2018), No. 1
Page/s:	24-33
Language of Publication:	English/German

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