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Metropolitan Zone Sub-Station
Upgrades to the civil infrastructure were required to supply power to a new Next DC data center. This involved deep excavations using Non-Destructive Digging (NDD) methods, with all contaminated spoil carefully managed and disposed of at an EPA-approved waste facility, ensuring compliance with environmental regulations.
Project Highlights
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Works were safely completed 4 days ahead of schedule
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Best practice confined space rescue equipment and methodology was implemented during construction
Services Provided
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Removal of 2 existing HV cables and 100mm conduits. Installed 4 new 150mm HD conduits in it's place.
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Performed deep excavation (3.5m depth) safely via NDD method and ensuring excavation was properly shored throughout works.
Challenges
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Complex and deep excavation, with fire main running through excavation that had to be properly supported during construction works
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Excavation was deemed to be a confined space environment during a phase in construction, GMHS had to pause works to reassess conditions. GMHS installed confined space rescue equipment and ensure atmospheric gas monitoring was conducted throughout next phases in construction to allow for works to continue
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Existing subgrade was found to contain large boulders that we unable to be removed in whole and had to be broken via hydraulic rockbreaker to ensure clearances for conduit installation
Services Provided
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Assessment of the condition of the deteriorated carpark and surrounding areas.
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Collaboration with our client to develop a Request for Quotation (RFQ) for the rectification works, providing expert advice and recommendations on the best approach to address the issues within budget and time constraints.
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Implementation of safety measures by cordoning off the affected areas to prevent public access during the works.
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Carrying out the necessary resurfacing and repairs to the carpark and other high-traffic areas, ensuring a safe and functional environment for the public until the larger capital project is completed.
Outcome
The client was extremely pleased with the final outcome, particularly appreciating GMHS' proactive approach in managing the evolving construction environment. Throughout the project, GMHS demonstrated a keen ability to pause and reassess conditions as they changed, ensuring that any potential risks were carefully evaluated.