The new development at No 3 Mineapolis Crescent required an excavation for basement parking. GFWAust were appointed to create a retaining wall by permeation grouting around the site for a distance of 40m to enable excavation to bedrock at a depth of 3m below surface.
         
The ground conditions consisted of Botany Sands with minor layers of peat and Coffee Rock. The sand was stabilised with interlocking 500mm diameter columns of grouted sand.