ABSEIL ACCESS INSTALL NEW ZEALAND’S FIRST
Our most recent geotechnical project was for Trustpower, working with Riley Consultants – the aim of the works was to rock bolt and install a combination of passive and active retention systems using William’s Bar and the first Maccaferri Steelgrid HR 30 rock fall netting installation in New Zealand.
The finished installation provided rockfall protection to the transformers and switch gear which was situated below the rock face.
The work was under a strict time frame due to the periodic maintenance outage at the Cobb Valley Powerstation.
In total, just over 370m of 100mm diameter holes were drilled and grouted, with 30m of of sub-horizontal drainage, 500m2 of active and 90m2 of passive rockfall netting with all anchors tensioned to a minimum of 40kN.