Melbourne's geology is a study in contrasts. The sandy deposits along the Yarra River delta and the silty clays of the basalt plains to the west behave very differently under dynamic loads. In our experience, the key to successful vibrocompaction design in this city lies in understanding the local gradation and fines content before selecting the compaction pattern. A deep sand layer near Fishermans Bend might respond well to a single pass, while the same approach on the silty sands of the Maribyrnong valley would leave loose zones. That's why we always start with a thorough site investigation, often combining a MASW survey to map vs30/" data-interlink="1">shear wave velocity profiles with targeted test pits. This upfront work saves weeks of trial and error on site.
A single vibrocompaction pass in clean Yarra sands can achieve relative densities above 80%; silty zones often require a tighter grid and slower probe withdrawal.