About the Project
ADDRESS 1 Alfred Street, Circular Quay
VALUE $12.1 million
OVERVIEW
The One Circular Quay project, with a site area of 3,600m2 situated less than 100m from Sydney Harbour involved a 20m deep excavation for a 6-level basement for the towers. 58,000m3 of sandstone was removed via a structural steel loading platform which included a truck turntable.
With its close proximity to the adjacent heritage listed Tank Stream, the upper fill layers and alluvial soils were carefully excavated under archeological supervision, uncovering relics dating back to the mid-19th Century. Further preserving Sydneys heritage, a seam of Pyrmont Yellowblock Sandstone was quarried from the site to be reused in the restoration of Sydney’s oldest buildings.
Large hydraulic braces were installed to retain the shoring walls where ground anchors were not possible. Below the shoring line, the self supporting sandstone was sawcut and left exposed.
Completion of our work included detail excavation prior to handover to the builder.
