Wynyard Walk

Wynyard Walk

Sydney CBD, NSW

One of Sydney’s most complex transport developments, Wynyard Walk is a major pedestrian infrastructure connecting the existing Wynyard Train Station to the new Barangaroo waterfront precinct. 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 unlock this previously unusable land beneath the city to deliver a world class customer experience, while minimizing the impact on existing infrastructure and buildings.

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 entry building off Clarence Street with a deep excavation and transfers spanning over a future railway corridor
  • Railway House transfer and underpinning – a complex underpinning and transfer of an existing 12 level 1920’s heritage building in an extremely confined basement adjacent the operation trains. This element required extensive high tech surveying monitoring systems and a network of multi-stage jacking ensure zero settlement of the existing building
  • One Margaret Street transfer – structural transfer beam system within the basement of an existing 20 storey tower to support the building and allow the new tunnel to pass under
  • Western Tunnel Portal – excavation and bridging works within a confined worksite with a landmark steel and glass canopy
  • Sussex Street Pedestrian Bridge – connects Wynyard Walk to Barangaroo with a bold concrete structure consisting of precast girders stressed to a cantilevering post tensioned abutment
  • Pedestrian Tunnel – a new 120m long tunnel constructed below both Clarence and Margaret Street

Awards

  • NSW Consult Australia Awards – Design Innovation Award – Highly Commended
  • NSW CIA Awards – Excellence in Infrastructure Projects
  • ACSE Awards – Excellence in Structural Engineering – Large Building Projects
  • NSW AIA Awards – Public Architecture – Commendations
  • NSW AIA Awards – Urban Design – Commendations

Fig 8 - Clarence Street Entry Building Construction Photo (taken from Wynyard Walk) retouched

Fig 9 - Clarence Street Entry Building (Completed)

Fig 10 - Sussex Street Pedestrian Bridge

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