The current dump slab at the Yandi OHP1 ROM wall had reached its 25-year lifespan, but BHP requested upgrades to the structure in order to extend the life of the structure for an additional 5 years.
Austral was contracted to provide the upgrades needed to address the horizontal shifting, corrosion, and slab degradation of the last 25 years of service.
Partial demolition of existing concrete slab to facilitate the demolition of existing bump stock kerb
Construction of new slab tying-in with existing slab with additional re-enforcement bars and 60kg rail sections
Horizontal stabilization via installation of Deadman block. Excavation and installation 32mm Diameter Reid rods, installed in the new portion of the dump slab, and tension at the conclusion of earthworks
Repair face panel corrosion at RE wall, utilizing EWP’s to identify areas of local degradation, and installing new RECO steel panels as needed to prevent further degredation
Stabilisation of area at the top and sides of the RE wing walls