Trenchless Installation of 132kV Underground Feeder

Posted 24 June 2011

The 132 kV Underground Cable Feeder 213 from Parklea to Bella Vista Zone Substation totalling around 3kms of trenchless pipe installation was completed by the joint venture CLM Infrastructure and UEA Trenchless in February 2011.

The project falls under the provisions of State Environmental Planning Policy (Infrastructure) 2007, which planned to construct three 132kV underground transmission lines associated with the establishment of Integral Energy’s new 132kV/11kV Cheriton Avenue Zone Substation that is located at the corner of Showground Road and Cheriton Avenue Castle Hill. The expansion is due to ultimate loads being generated by strong growth in local commercial infrastructure, which in future will require the new feeders to shift loads from one substation to the other once the feeders are energised.

The CLM Infrastructure and UEA Trenchless joint venture worked with Government organisations Blacktown City Council, The Hills Shire Council, NSW Roads and Traffic Authority and the State Transit Authority to complete the project.  The project was delivered successfully and within the prescribed time frame required by the principal Integral Energy.

Trenchless Pipe Laying Methods

Working in conjunction with our joint venture partner, UEA successfully constructed several trenchless road crossings using horizontal directional drilling. The crossings were predominately located at all roundabouts to minimise impacts on the high traffic flow within the business park.

UEA utilised a series of directional drilling rigs to complete the scope of works for the underground conduit feeder system. The newest piece of plant at UEA Trenchless, the 10 tonne Ditch Witch All Terrain 3020 was used to undertake six out of the seven pilot bores on the project, which was then followed and reamed by the 25 tonne Vermeer D50 x 100  or the 45 tonne Vermeer D100 x 120.