Drilling rigs and backhoe excavators are a common sight across Sydney's suburbs, from the Hawkesbury sandstone ridge to the Botany Sands aquifer. The team deploys hydraulic augers and thin-walled Shelby tubes to retrieve undisturbed cores, then seals them immediately to preserve moisture content. Each sample is logged on site for color, texture, and consistency before heading to the NATA-accredited laboratory for classification testing. This physical workflow ensures that every soil mechanics study in Sydney captures the true state of the ground before any foundation design begins. The process follows AS 1726:2017 for undisturbed sampling methods.
Sydney's reactive clays can swell up to 60 mm annually; a proper soil mechanics study identifies this risk before slab design.