Geo-Technical Contracting & Engineering
Contiguous or secant piles are augered (or C.F.A) piles are installed so that each pile is in contact with the piles on either side of it. This system is suited to unstable soil conditions (clays, sands, saturated soils) which do not have the ability to arch and will collapse if left unsupported. Contiguous piles can be incorporated with permanent works (i.e. basements) and can be designed to carry vertical loads.