Project Profiles

Shared Tunnel Installation Sydney
NSW 2003

Client: Energy Australia

Shared Tunnel

Daly’s Constructions completed this project for Energy Australia in Sydney, NSW. The project required the installation of four separate 132kV circuits within a new tunnel from Haymarket Substation through individual hauling chambers to transition joint bays at road level.

The pulls were approximately 800 metres in length and cables were installed on rollers assisted by four caterpillars hydraulically linked to be operated from a central designated location.

Specialised equipment was supplied to lift the cables from the rollers onto support brackets mounted on tunnel walls. The equipment was engineered to facilitate snaking of the cable whilst placing them onto support brackets. The snaking of cables was critical to cater for expansion and contraction during cable operation.