CROWN INFINITY
Sydney, NSW
Diaphragm Wall, Anchors
Project Description
The Infinity Project at Green Square will be a 20 floor reinforced concrete building, with 18 floors dedicated for residential and 2 floors for commercial purposes. The building will have a 3 level basement constructed by the use of the Diaphragm Wall technique, to achieve the permanent, watertight retaining structure for the basement. The wall is an 800mm thick reinforced concrete wall up to 15m deep. The wall is supported by one row of anchors during excavation phase. The North West corner is buttressed instead of anchors to avoid clashing with the railway tunnel directly underneath that section of site.
Solutions
The works were carried out with the use of two excavation cranes to support the Grab and Hydrofraise and one service crane for the cage installation. The purpose of the grab was to excavate the other than rock material. Once the rock layer was reached the Hydrofraise excavated to the design toe. In the North West corner, deep Barrettes were installed to support the outer wall during excavation phase which will be demolished once the basement slabs are installed.
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