NCTIR SR1/2 Remedial works, Kaikoura

Rockfall remedy

PROJECT: NCTIR SR1/2 Remedial works, Kaikoura CONTRACTOR: Rock Control CLIENT: NCTIR VALUE: $600,000

Rock Control was engaged by NCTIR to install a bespoke anchored precast panel system, an anchored reinforced shotcrete face, and a 500kJ rockfall catchfence along an active slip and rockfall hazard zone.

The site was within close proximity to the main SH1 corridor south of Peketa, Kaikoura. The site was bounded by the Kahutara River, opposite the marine shorefront and is of high cultural significance to the area. Works had to be carefully managed with the busy State Highway and productivity was crucial to minimise disturbance to the main traffic flow. Strict quality objectives and weekly targets were met for the preparation and placing of the 11-tonne panels via high-capacity mobile cranes followed by anchoring. Variable ground conditions required casing systems to ensure that the anchor holes were competent to receive the double corrosion protection anchor strands. Much of the work required EWP or rope access due to the high slope angles and height of the structures. The rockfall catchfence and anchored shotcrete portions of this work required multi-disciplined skilled personnel to construct and finish to a high-quality standard.