The program will support Sydney’s long-term economic and population growth by easing congestion, creating jobs and connecting thriving communities. It will provide improved motorway access and connections to Western Sydney and key employment hubs across the city, including vital links to Sydney Airport and Port Botany, delivering new active transport options to the CBD, Rozelle and over 9 hectares of new open space.
The interchange in Rozelle will be mostly underground and located at the site of the old Rozelle Rail Yards. This creates various challenges including different geologies and groundwater behaviours that impact on the design, construction and operation of the tunnels to minimise impacts on the surrounding communities and environment.
Ray Hatley, WSP’s Capability Executive for Hydrogeology within our Water Resources team was the Technical Expert and Verifier on the project advising on groundwater inflow to tunnels and excavations and influences of groundwater behaviour on the design of underground structures. With 37 years’ experience, Ray has provided geological, hydrogeological and related environmental services to infrastructure, transport (road/rail/tunnel), construction, mining, energy, industrial, land development projects and state and federal government clients and community groups.
“Leveraging WSP’s Future Ready approach to design water level assessments for the major structures, our groundwater team evaluated climate change and extreme tide impacts of long-term design water levels,” says Ray. “The key focus of these works was to provide high level input to technical designs and concept meetings and provide a modelling platform for rapid scenario testing of detailed design features. This benefited our client by providing a robust, cost effective and simple design that mitigated risk and a sustainable solution for future generations.
“Groundwater is one of our most important natural resources and critical for water resilience.” Ray adds. “I’m passionate about applying a better forward-thinking approach coupled with smarter predictive technologies to achieve better outcomes for our clients and communities.”
Our team provided groundwater related input into the detailed design stage of work involving a review of the contractor’s predictive groundwater model, verification modelling of cut-and-cover structures (using Seep/w and Seep3D) and hydrogeological advice to the design team.
Our Water Resources team are supporting a number of other major projects including Woolgoolga to Ballina Pacific Highway Upgrade, various projects being delivered under ARTC’s Inland Rail program, NSW’s Special Activation Precincts, WaterNSW’s Burrawong to Avon Tunnel project, Victoria’s Level Crossing Removal Projects, Mordialloc Bypass Freeway Project, NSW’s Western Harbour Tunnel – Beaches Link tunnelling project, Western Sydney Airport, South Australia’s North South Corridor project and Sydney Metro City & Southwest.
For more information, contact Ray Hatley.
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