What are the types of contiguous piling?
We use two methods of bored pile techniques for contiguous piled walls:
- CFA (continuous flight auger) piling removes soil with an auger while at the same time concrete is pumped through the auger’s hollow centre.
- Rotary piling removes soil with an auger, a reinforcing structure is inserted followed by poured concrete.
Both bored pile methods are technically effective, and can be used when the available working area means that excavation must be vertical. They are a temporary or permanent means of retaining the sides of bulk excavations, even in water bearing strata, and use the same techniques as foundation bearing piles. In permanent installations, contiguous piles can be designed to bear horizontal as well as vertical loads.