Contiguous Bored Auger (CFA) across the UK and Ireland
Foundation Piling has a fleet of Continuous Flight Auger rigs capable of constructing bearing piles in unstable ground with minimal environmental disturbance. In this method the auger stays in the pile bore to the final depth, being withdrawn slowly with the pile spoil whilst concrete is pumped through the hollow auger stem into the pile. As well as in loose or granular soils, CFA may be the only viable solution for noise and vibration sensitive work, and on some restricted access sites.
CFA is the quietest form of piling and is suitable for forming piles in most types of soil, particularly interbedded sequences of clays and sands and water bearing cohesionless strata.
Foundation Piling continues to pioneer the development of restricted access auger equipment. The use of sectional flight auger (SFA) techniques in low headrooms and restricted access have in the past been limited to a maximum of 300mm. Piles up to 600mm diameter can now be installed in excess of 30 metres in certain soils within headrooms as low as 4 metres.
- Diameters from 300mm – 600mm
- Depth up to 30m
- Casing installation to 15m
Bearing piles and continguous/secant retaining wall piles
Low vibration piles
Restricted access and head room piles.
In addition, for small restricted access retaining walls, see retaining walls.
© Copyright 2011 Foundation Piling Ltd | Contiguous Bored Auger (CFA) in the UK and Ireland