Sydney CBD, NSW
One of Sydney’s largest and most complex transport developments, Wynyard Walk is a major pedestrian infrastructure connecting the existing Wynyard Train Station to the new Barangaroo waterfront precinct and Sydney CBD western corridor. Components consist of a new civic entry building for Wynyard Station, a pedestrian tunnel, a western tunnel portal, a plaza and a bridge spanning Sussex Street. With the tunnel passing beneath a unique mix of high-rise office towers and historical buildings, intelligent engineering solutions have been employed to navigate a complex web of heritage elements and contemporary services involved in all project components. Working within a busy city hub, site constraints necessitated creativity and close consultation with all stakeholders to deliver a solution that will provide access and comfort for around 33,000 pedestrians each day.
The key features of the project include:
- Western entry to Wynyard Station – a new Clarence Street Entry Building
- Railway House transfer structure – a complex underpinning of an existing 12 level 1920’s heritage building in an extremely small space. This element required extensive high tech surveying monitoring systems and multi-stage jacking and supporting of the existing building
- Margaret Street transfer – structural reconfiguration to provide for a tunnel adjacent to an existing 20 storey tower, and beneath the existing carpark
- Western Portal – reconfiguration to the Napolean Plaza and new canopy structure
- Sussex Street Pedestrian Bridge – connects Wynyard Walk to Barangaroo, where all architectural features are exposed
- Pedestrian Tunnel – a new 120m long tunnel constructed below both Clarence and Margaret Street
The complexity of the project was to continue construction, while one of Sydney’s busiest train lines and major street networks remains open and completely operational.
- ACSE Awards – Excellence in Structural Engineering – Large Building Projects