Abstract
Legacy Way is a 4.25 km twin tunnel which will connect the Western Freeway at Toowong to the Inner City Bypass at Kelvin Grove in Brisbane. Legacy Way is an initiative of Brisbane City Council and has been designed and constructed by Transcity, a joint venture of Brisbane based BMD Constructions, Spanish construction company Acciona and tunnelling specialist Ghella from Italy. The project’s two parallel tunnels were bored with two hardrock tunnel boring machines (TBMs) through approximately 3500 m of Bunya Phyllite and 700 m of Neranleigh-Fernvale with a UCS in the range of 60–100 MPa. These double-lane motorway tunnels will have cross passages approximately every 120 m throughout the tunnel and a smoke duct to remove smoke out of the tunnel in case of a fire. The westbound tunnel was excavated by the TBM named ‘Annabell’, whereas the eastbound tunnel was excavated by the TBM named ‘Joyce’.
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