Usually performed as part of an investigation, exploration or construction Hagstrom uses geotechnical drilling as a tool to obtain core samples or to establish a safe foundation prior to construction for onshore or close to shore projects. 

Working under the supervision of an experienced Geotechnical Engineer who oversees the project, Geotechnical drilling is typically undertaken by our qualified team of drillers who are all Class 1, Class 2 or Class 3 ADIA accredited. They have the knowledge and experience to safely operate specialised drilling equipment and undertake work to the highest standards.

What is geotechnical drilling used for?

Geotechnical drilling is primarily used for site analysis. This includes drilling to collect rock and soil samples, determining soil stability and the geology of the site.

The analysis is critical, as unsafe rock or soil conditions could undermine the integrity of the site and trigger the structural collapse of buildings during natural disasters such as tornado’s, floods or earthquakes.

Geotechnical drilling is also used to search for deposits of minerals, oil, gas, and other valuable resources. The core samples and site data is used to establish the viability of the project.  

Why is geotechnical drilling necessary?

In Australia, regulations require a site to be investigated for safety before a building permit can be granted. Drilling rigs and other drilling equipment are deployed to closely monitor for safety and to identify any changes or indications of developing problems that could pose a risk to the development. The data collected is used to determine whether or not a site is appropriate for the planned construction.

Our experience

With a track record of operating with precision in a range of challenging geological and ecological site conditions throughout Australia. Hagstrom has extensive Geotechnical Drilling experience. Our projects include:


Hagstrom Drilling successfully completed a geotechnical site investigation for the planned Barangaroo Ferry Hub in Sydney Harbour. A Sea Lift 6 was utilised in combination with a UDR 100 drilling rig and a skid mounted CPT unit. The scope of work completed comprised seven bore holes and five CPTs through the geology of surface sand and mud and then down through sandstone.  Mobilisation was completed out of a local yard and required careful attention to the high level of marine activity in and around the site and also tidal timetables which assured the safe towage of the barge under the Anzac bridge.  


Hagstrom Drilling were engaged to provide geotechnical and environmental drilling services for a proposed APLNG site on Curtis Island Queensland. This twelve month project involved five drill rigs and associated support equipment to provide the drilling for various tests including groundwater monitoring boreholes, acid sulphate soil boring, pressure meter testing, and test pits. Approximately 2000 metres near shore over 2500 metres onshore drilling were safely and efficiently completed.


Hagstrom Drilling provided PQ diamond drilling and SPT’s utilising a heliportable UDR-100 drill rig (DR005) mounted on a jack-up barge for Phase 1 of a near shore geotechnical investigation. This drilling project was part of the pre-feasibility study carried out for the company’s Ichthys Gas Field Development Project.

At Hagstrom Drilling we pride ourselves on the extent, diversity and range of our professional services. Talk to us about your Geotechnical Drilling needs.