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Abstract: The St. Peters Interchange ramp tunnels are situated at the northern end of the New M5 tunnels, part of the larger WestConnex project in Sydney, Australia. This paper presents an overview of the design for two large span and shallow cover ramp tunnels as designed for the New M5 tunnels. These ramps were excavated through the Ashfield Shale Formation, crossing dykes and faulted ground with a...