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ATS VIC – Groundwater and Tunnelling in Melbourne – considerations, complexities and a recent project example

October 30

Registrations: https://www.engineersaustralia.org.au/event/2019/10/groundwater-and-tunnelling-melbourne-considerations-complexities-and-recent-project


The hydrogeology of Melbourne is highly variable. The intersected and surrounding ground conditions of tunnelling projects will strongly influence the groundwater response and consideration for required groundwater control. This presentation will provide an overview of Melbourne’s hydrogeology as well as relating this to challenges in tunnelling projects. The example of groundwater assessment and control measures adopted for the EastLink project will be presented, along with discussion on the implications for environmental and performance requirements for current tunnelling projects.


The EastLink tunnels were constructed in an ecologically sensitive environment in eastern Melbourne. The project adopted strict tolerances on groundwater drawdown and tunnel ingress. In permanent design a fully tanked tunnel design option with compartmentalisation of the tunnel using cut-off and grout curtain was adopted which was a first in Australia.




Peter Campi

Peter Campi has over 20 years of experience as a geologist, engineering geologist, and geotechnical engineer and is a graduate from RMIT. His experience spans both the mining and civil industries including underground and open pit mines, civil road/rail/water tunnels, and caverns and surface excavations. His underground experience in Melbourne include EastLink and most recently Melbourne Metro Tunnel Project. Peter is a Principal with Coffey.


Brigid Moriarty

Brigid Moriarty has 15 years experience as a hydrogeologist and has a Bachelor of Engineering and Bachelor of Science from The University of Melbourne. Brigid has worked across the groundwater resources, mining, oil and gas and transportation and civil infrastructure sectors including road, rail and water tunnels. She currently leads the specialist groundwater studies and input to the Melbourne Metro Tunnel Project for the Tunnel and Stations PPP package. Brigid is a Principal with Coffey.