JDK Geotech was commissioned to work on the Sydney Metro (TSE) project to help in the delivery of the project's Construction Phase Services (CPS).
This scope was won by engineering consultants PSM (Pells Sullivan Meynink) who seconded JDK staff to deliver their work to the Client CPB and John Holland & Ghella joint venture (CPBJHG).
The CPBJHG run project included the excavation of underground rail tunnels and associated transportation infrastructure that make up the Sydney Metro Stage 2. The Chatswood to Sydenham tunnelling component of the project is now completed, and the commissioning and testing of this network continue throughout 2023/24.
The works supplied by JDK were exclusively Construction Phase Services (CPS) on all. This geological scope included shift coverage of both Day Shift and Night Shift face mapping and geotechnical inspections. JDK was seconded by PSM (Pells Sullivan Meynink) for assistance with their internal resources across all seven stations, making this a busy project.
The project scope was the delivery of six new underground metro stations, a crossover cavern at Barangaroo, as well as several TBM cutter head retrieval shafts.
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A temporary retrieval site was utilized for the removal of the TBM cutter heads and shields at Henry Lawson Reserve. The site was then used as an access point for tunnel fit-out activity between the new Sydney Metro Barangaroo and Victoria Cross stations. Tunnel fit-out was completed in late 2021/22 and the acoustic shed has been removed.
Key project features include 16 km of the new metro line between Chatswood and Sydenham, 15 km of new twin rail tunnels, the excavation of large-scale station boxes within proximity to heritage-listed infrastructure, and close excavation interfaces between the project footprint and existing underground rail corridors. The scope was delivered effectively by the JDK staff, who worked under the supervision of PSM.
Sydney Metro (TSE)
John Holland CPB Ghella
Joint Venture (JHCPBG)/Pells Sullivan Meynink (PSM)
2019 – 2021
$11.5 billion to $12.5 billion
JDK orchestrated the systematic capture of diverse geotechnical and geological information, including an assessment of roof conditions, crack mapping, final lining reporting, geological defect mapping, and monitoring for rockfall remediation. The geotechnical assessment and confirmation of ground conditions were used to support type design compliance.
JDK was involved in the management of all excavations and associated permits, including a permit to excavate and trench through ground conditions with high defects and weak rock mass. We were also involved in monitoring TBM progress through poor ground conditions and increased water flow areas and carrying out a permit to excavate (review and implementation) through poor ground conditions.
JDK is currently working on the Sydney Metro City & Southwest project, communicating successfully with multiple stakeholders, and providing extensive geotechnical expertise throughout the project. Our team interpreted all practices and reviewed them carefully to ensure accurate ongoing project management and controlled tunneling risk.
The implementation of monitoring controls was completed with minimal community complaints, client issues, or damage to existing infrastructure. Innovative data collection methods were employed by JDK throughout the project to deliver high-quality data capture for future works.
All project works were delivered safely, within budget, and on time, meeting the contract's design terms precisely. Accurate inferences of ground conditions ensured the client’s efficient distribution of resources and promoted the successful maintenance of the relevant deliverables schedule. JDK is proud to have played a key role in developing new metro stations and associated infrastructure for the Sydney community.