BG&E provided structural and civil engineering for the Southern Suburbs Railway infrastructure project. The three sites involved the construction of a railway station within the existing corridor of the Kwinana Freeway, with minimum disruption to freeway traffic.
Bull Creek and Murdoch stations incorporate new bus bridges spanning the freeway to accommodate intermodal transfer to the train operations below. The bridge structures are composed of precast concrete trough beams weighing up to 150 tonnes acting compositely with an in-situ concrete topping slab. The beams were lifted into position during a partial closure of the freeway. The bus bridges are parallel to existing traffic bridges carrying Leach Highway and South Street and enable buses to interface with the station and then complete a return loop.
The works also included substantial earthworks associated with at-grade parking, bus movements and shared paths. At Bull Creek, a new pedestrian bridge provides disabled access from adjacent residential areas. The Canning Bridge station involved the conversion of an existing bus transfer facility into a new intermodal transit station including new lifts, stairs, platforms and services.