Jamieson Road Roundabout Upgrade – Blakeview, South Australia
Project Type: Geotechnical and Pavement Investigation – Road Infrastructure
Client: Private Engineering Consultant
Overview
TERRATECH was engaged to undertake a geotechnical and pavement investigation to support the upgrade of Jamieson Road, including the construction of a mountable roundabout and raised shared zone adjacent to Trinity College, Blakeview. The project forms part of a community-focused road safety initiative, creating a low-speed environment and improving safety for vehicles, pedestrians, and cyclists within a busy school access corridor.
The investigation focused on characterising existing pavement materials, highly reactive clay subgrades, and subsurface conditions influencing pavement performance and constructability. The scope included borehole drilling, Dynamic Cone Penetrometer (DCP) testing, laboratory soil testing, and assessment of existing pavement materials to inform pavement design, subgrade treatment, and opportunities for material reuse.
Key Challenges
Highly reactive clay subgrades prone to moisture-related shrink–swell movement
Assessment of existing pavement materials for potential reuse
Managing drainage and moisture control to minimise long-term maintenance requirements
Outcome
TERRATECH delivered clear, practical, pavement-focused geotechnical advice addressing reactive subgrade behaviour and material reuse. Robust design parameters and constructability guidance supported efficient pavement design, reduced long-term maintenance risk, and enabled the safe, durable delivery of this community-focused road infrastructure upgrade.
Featured Projects
-
![Drilling and soil investigation at Seacliff Apartments geotechnical project]()
Seacliff Apartments – Linwood Quarry, South Australia
A comprehensive geotechnical investigation for a high-rise residential development on a site underlain by deep historic fill, delivering a cost-effective and constructible foundation solution.
-
![Geotechnical fieldwork at Paiwalla Wetland site in South Australia]()
Paiwalla Wetland, South Australia
Geotechnical investigation for a wetland regulator structure near the River Murray, providing foundation design parameters and construction guidance in saturated, environmentally sensitive conditions.
-
![Drilling rig and geotechnical investigation at Blackwood road project]()
Main Road Blackwood, South Australia
Geotechnical investigation for a multi-storey mixed-use development with deep basements in steep terrain, providing foundation and retaining wall solutions validated to Australian Standards.
-
![Geotechnical drilling and site testing at Payneham Road mixed-use development]()
Payneham Road, St Peters, South Australia
Geotechnical investigation for a mixed-use development with basement construction on variable fill, supporting CFA pile foundation and retention design in accordance with Australian Standards.
-
![Excavation and soil testing at Newton Village geotechnical project]()
Newton Village Shopping Centre Expansion – Newton, South Australia
TERRATECH completed a geotechnical investigation for the Newton Village Shopping Centre expansion, assessing uncontrolled fill and reactive Keswick Clay soils. Findings supported foundation and basement design, reducing ground movement risk and aiding efficient redevelopment.
-
![Geotechnical CPT testing and drilling at Gibson Street Bowden site]()
Lot 2002 Gibson Street, Bowden
TERRATECH completed a geotechnical investigation for a ten-storey Bowden development with a deep basement. CPT testing and analysis supported piled foundations, retaining wall design, groundwater management, and reduced construction risk.
-
![Geotechnical investigation at Jamieson Road roundabout upgrade]()
Jamieson Road Roundabout Upgrade – Blakeview, South Australia
TERRATECH completed a geotechnical and pavement investigation for the Jamieson Road roundabout upgrade in Blakeview. Testing assessed reactive clay subgrades and pavement materials, supporting design, reuse opportunities, and long-term performance.
-
![Geotechnical trenchless pipeline investigation at Ceduna rail crossing]()
TK-14 Aurizon Rail Crossing – Ceduna, South Australia
TERRATECH completed a targeted geotechnical investigation for a trenchless water pipeline crossing beneath the Aurizon rail corridor near Ceduna. Testing assessed variable calcarenite and groundwater, supporting safe auger boring and risk mitigation.
-
![Geotechnical soil assessment at Bagot Street Medical Centre site]()
Bagot Street Medical Centre – North Adelaide, South Australia
TERRATECH completed a geotechnical investigation for the Bagot Street Medical Centre in North Adelaide, supporting foundation and basement design. Recommendations addressed uncontrolled fill, deep excavation, and car-stacker loading in a constrained urban site.
