Alkimos Main Sewer Section 1

Supplying Heavy-Duty Pipe for a Heavy-Duty Alignment

Empire Infrastructure supplied 463 metres of BOSSPIPE™ CC-GRP, OD1499, SN64,000 jacking pipe, along with three interjacks and specialised bends engineered for DN1500 microtunnelling. The alignment demanded pipe that could withstand substantial thrust forces while maintaining structural integrity across long drives, a challenge perfectly suited to CC-GRP.

The project involves 830 metres of DN1500 sewer, constructed between deep shafts, microtunnelling, and open excavation. Two microtunnel drives, 157 metres and 306 metres, required precise navigation, including a critical tie-in beneath the Alkimos Station rail corridor built as part of METRONET's Yanchep Rail Extension.

"Large-diameter microtunnelling pushes pipe performance to its limits, and CC-GRP is built precisely for this level of demand." Aaron Mackley, Director of Sales & Operations, Empire Infrastructure

Meeting the Challenges of Depth, Diameter and Density

With shaft depths reaching 9 to 12 metres, ground pressures and jacking loads were significant. CC-GRP's high strength-to-weight ratio offered reliability, while the interjacks distributed thrust over long distances, essential when installing large-diameter pipelines beneath existing and future transport infrastructure.

A Project Built on Collaboration and Precision

Rob Carr consulted extensively with the Alkimos Central development precinct. Throughout design and delivery, Empire Infrastructure worked closely with the project team to ensure the pipe's performance characteristics aligned with the tunnelling methodology and staging requirements.