Capitol Grand

Multiplex contracted Delta Group in 2016 to complete civil construction works for Melbourne’s first 6 Star integrated residential and retail precinct – the $500m ‘Capitol Grand’ development in South Yarra.

 
The scope of works included:

• Site preparation, including the removal of existing retaining wall and waste materials and contaminated ground material.
• Bulk/detailed excavation works allowing for the construction of reinforced concrete foundations and placement of imported engineer fill for the construction of a piling platform.
• Construction and removal of temporary ramp retention.
• Concrete infrastructure – slab preparation layer, retention systems and lift core rafts.
• Construction of crane bases.
• Emissions, noise and vibration controls.
• Transport logistics, including traffic management and supervision.
• Site infrastructure – basement stormwater drainage systems.
• Site dewatering.

This project involved an extremely tight works programme that included two large cores handed-over separately. While operating down to 15 metres on a large 5,600 sqm site we were limited to just one access point via a neighbouring alley-way, which demanded a large temporary ramp to maintain clearance of one of the main cores. We also overcame challenges relating to a range of soil types that varied from dyke material to weak and hard mudstone – all within close proximity to each other. Other key achievements included:

• Excavation of more than 100,000 cubic metres of siltstone.
• Installation of 155 retention piles and 140 foundation piles, as well as 850 temporary ground anchors.
• Spraying 4,500 sqm of shotcrete.