A continuous wall of concrete
8,000m3 of concrete was supplied to Brian Perry Civil to construct the walls of a 300m trench, part of the new 2km Manukau Rail Link. A 'Secant Piling' process was used to construct the walls using Firth's proprietary 'soft pile' mix to create a row of piles. Where the piles touch, the concrete is bored out and a high strength 40MPa pile is poured to create a continuous 'wall' of concrete.