Australia, News, Tunnelling

Empire Infrastructure’s contribution to award winning sewer project

Empire Infrastructure - Quinns Main Sewer

Empire Infrastructure has supplied Macrete universal smoothbore shaft segments for an award winning project in Western Australia.

Rob Carr and Water Corporation’s Quinns Main Sewer project claimed the Earth Award in the $30m to $75m category at the recent Civil Contractors Federation WA’s annual Earth Awards for excellence in civil construction.

CCF WA Chief Executive Officer Andy Graham described the Earth Awards gala dinner, hosted on Friday, 20 September at Crown Perth, as a celebration of infrastructure achievements big and small, with 21 finalists across the seven categories.

“Congratulations to all the WA Earth Award winners and we wish them well at the National Earth Awards in Canberra in November,” he said.

The Quinns Main Sewer project featured 1.93 km of tunnelling, including a technically challenging curved drive over 500 metres long beneath a freeway and railway. The segmental shafts were used as launch pits throughout this alignment.”

The CCF WA praised the project for “exceptional” engineering precision, highlighting the construction of shafts reaching depths of up to 27 metres, and the incorporation of two vortex structures.

The organisation also highlighted the safety and environmental stewardship of the project, which managed risk for the team, the public, and the national park.

Macrete universal smoothbore shaft segments supplied by Empire Infrastructure were used in three locations on the Quinns Main Sewer.

The segments supplied by Empire Infrastructure were nine metre diameter rings with a height of one metre – in total, 27 rings were provided for the project.

The caissons constructed by Rob Carr used a combination of the precast segments from Empire and insitu concrete. The the deepest caisson utilised insitu concrete for the first 10m then switched to the Macrete segments at 10 m when they hit rock. All of the other caissons were constructed with your Macrete segments from the top.

The segmental precast shaft system provided an effective and efficient solution for the challenging ground conditions which led to Rob Carr selecting the Macrete segments from Empire Infrastructure.

Empire has supplied Macrete universal segments to projects right across Australia, including this one in WA and all along the East Coast.

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