![]() This allowed full construction of the driven tunnel with a one-pass shotcrete lining within an 8-month period, compared to two to three years for the cut and cover option, with no disruption to train services. OutcomeĬonstruction commenced by inserting arrays of canopy tubes 39 feet (12 meters) long ahead of the tunnel under the operational tracks above. A new rail underpass for freight trains at North Strathfield new track to connect to the. The selected tunnel option included movement of the tunnel alignment north by about 200 feet (60 meters), resulting in more favorable geological conditions and a deeper tunnel situated directly beneath the operational railway lines. We assessed several alternate underpass construction options with the primary aim of eliminating the previously selected cut-and-cover approach to reduce construction time and disruption to mainline services above the underpass.ĭrawing on finite element analysis (2D and 3D) and the multidisciplinary engineering expertise of our team, we demonstrated the feasibility of the driven tunnel option. provided the detailed design for an underpass on Australias busiest rail. ![]() Mott MacDonald was appointed as technical advisor subconsultants for the concept design phase. North Strathfield rail underpass: doing it smarter on Australias busiest rail. In 1924, a third platform was added on the western side. the multi-million-dollar design and construction of the Glenfield to Leppington rail line and the North Strathfield rail underpass to name a few. It was necessary to navigate surface rock outcrops on the eastern embankments while ensuring minimal disturbance to surface settlement. North Strathfield station opened on 9 June 1918 as an island platform with two faces. Sydney 14th October 2015 Daniel Clert North Strathfield Rail Underpass Shallow tunnelling techniques Northern Sydney Freight Corridor (NSFC) Program. The tunnel excavation dimensions are 7 m in height and 9 m in width and has a horseshoe shaped profile with the ground cover varying between 2.5 to 3.5 m above the tunnel crown. The North Strathfield Rail Underpass tunnel in Sydney, Australia, is a 148m long rail tunnel designed for freight trains up to 1.5km in length. Transport for New South Wales faced the challenge of constructing a grade-separated southbound freight line beneath three heavily trafficked electrified suburban railway lines, without disrupting service to the North Sydney rail network. The underpass is designed for diesel hauled freight trains up to 1.5 km in length.
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