Grout mix piles and soil mix walls to form 140m long x 9.0m deep cut and cover excavation for Perth metro rail tunnel on the Esplanade portion of the works. Overlapping grout mix piles created a base floor through which soil mix pile walls were constructed to create a water tight chamber for tunnel construction.
Grout mix piles installed at the TBM exit portal to allow for the TBM to be retrieved. Grout mix block 25m x 20m x 12.0m deep at Roe St.
Sheet pile and anchors. Various sections of the works requiring temporary retaining using sheet pile and anchors for dive structures, cut and cover approaches and other excavation.