ASAP Piling — Down-Hole Hammer Specialist
Rock Drilling Melbourne — Through Basalt and Hard Rock Since 2001
Rock drilling is needed when foundation piles must go through hard rock that a standard drilling auger cannot penetrate. ASAP Piling uses specialist down-hole hammer equipment to drill through Melbourne's basalt rock — found across the inner northern suburbs, western suburbs, and parts of the Mornington Peninsula. When rock is hit during standard bored pier drilling, ASAP Piling switches to rock drilling equipment on site. Rock drilling projects completed across Melbourne since 2001.
Where Is Rock Found in Melbourne?
Rock turns up at surprisingly shallow depths in many Melbourne suburbs. Knowing where rock is likely saves time and keeps projects on budget. Areas where ASAP Piling regularly drills through rock:
Inner Northern Suburbs
Essendon, Moonee Ponds, Ascot Vale, Brunswick, Coburg, Strathmore — rock is often very close to the surface, commonly within 2 to 5 metres down. A high proportion of piling jobs in this zone require rock drilling.
Western Suburbs
Footscray, Yarraville, Williamstown, Sunshine, Keilor — rock depth varies across the zone but can be very shallow in many areas.
Inner Melbourne
Docklands, West Melbourne, North Melbourne — variable ground where rock can appear in deeper excavations.
Mornington Peninsula (Elevated Areas)
Red Hill and Mt Eliza — rock is present on higher ground across this zone.
Important: Rock depth and type varies even within a single street. A soil investigation is the only reliable way to determine what's below your specific site.
How ASAP Piling Drills Through Rock
Down-hole Hammer (DTH): A pneumatic hammer sits at the bottom of the drill string inside the borehole. It strikes a hardened drill bit at high speed — breaking rock rather than cutting it. Crushed rock fragments are flushed to the surface by the exhaust air. This is ASAP Piling's primary method for Melbourne's hard basalt — effective and fast in solid rock.
Rock Roller Bits (Tricone): Three rotating toothed cones crush and grind the rock face as the drill turns. Used for softer or weathered rock where the full force of the down-hole hammer is not needed. Covers a wider range of rig setups and rock conditions.
Rock Socketed Piles
When a pile needs to anchor into rock rather than just passing through it, the engineer designs a rock socket — a length of pile drilled into solid rock so the building's load transfers directly from the concrete pile into the rock. The socket depth is specified by the engineer based on the soil investigation results and the building's structural loads for that site.
Frequently Asked Questions
Enquire About Rock Drilling
Call Nick on 0499 888 799 — have your geotechnical report ready for an accurate quote.