Geo-Technical Contracting & Engineering
The standard auger pile is the most commonly used pile and is best suited to partially saturated cohesive and residual soils. The piles are installed by means of an auger rig with a drilling head and auger flight attachment.
Drilling is carried out by rotation of the drilling head and lowering of the auger allowing it to penetrate into the soil. Once the auger flight is full it is withdrawn and spun off. This procedure is repeated until the required depth is reached. A winch is then placed over the hole and a man is lowered down the hole in order to remove the remaining loose soil from the bottom. The small diameter piles are cleaned with a manually operated cleaning bucket. Once the cleaning of the hole has been completed a reinforcing cage with spacer blocks is lowered down the hole into position.
The pile shaft is then concreted using a self compacting mix discharged through a short funnel and is then vibrated to assist compaction of the concrete. Should rock sockets be necessary it is possible to fit alternative drilling tools to the drilling head to penetrate soft to hard rock refusal.