Point Fraser is a 6.13 hectare public recreation reserve located adjacent to the Swan River Foreshore at the eastern gateway to the city of Perth.
In June 2008 planning approval was given for the final phase of the redevelopment consisting of an $18 million mixed-use hospitality development to be located west of the causeway.
Three commercial buildings will be constructed on site with two of those buildings constructed on the foreshore. The third building will be constructed over the river itself providing a public boardwalk along with ferry and boat access.
CMW Scope of Work
- Undertake a borehole investigation to depths of approximately 30 metres (~6 metres into Guildford Formation) to provide more certainty with pile foundation levels;
- Assess the likely impact of acid sulfate soils on pile design; and
- Provide onsite testing of test piles to assist in confirming the capacity of the underlying materials to accommodate working loads ranging from 200kN – 2000kN.
Numerous geotechnical investigations comprising Cone Penetrometer Testing (CPT) have been carried out by other Geotechnical Consultancies. They were conducted to refusal to depths of up to 24 metres below the ground surface and confirmed the presence of weak alluvial deposits.
A lot of uncertainty existed regarding the behaviour of the needle beam’s under jacking. CMW was able to provide a simple, time efficient solution that prevented delay to Mirvac’s schedule.
However, the CPT data was not sufficient to adequately demonstrate the presence of appropriate bearing stratum and selection of relevant design parameters for the support of pile foundations with the proposed loads.
We consulted with our client closely and provided them with 3 different pile options to meet their budget including ground settlement predictions based on design loads.