CFA PILING

CFA Piling is, by far the quietest form of piling. It’s an extremely fast and economical technique and is suited to soft ground where deep casings or the use of drilling support fluids might otherwise be needed.

CFA piles are formed by drilling to the required depth using a hollow stem continuous flight auger. After reaching the required depth, concrete is then pumped through the hollow stem. While the concrete is being pumped, the auger is slowly withdrawn, removing the soil and forming a shaft of fluid concrete extending to ground level. A cage is then inserted into the fluid concrete. Reinforcing cages with lengths up to 12 metres are commonly used in CFA piling.

CFA piling is a non-displacement piling system where the soil excavated from the pile is brought to the surface of the ground. CFA piling can create plies which can be an attractive alternative to conventional bored piles and to driven piles as they are much quicker to create and cause much less noise and vibration.

CFA piles can be used for load transfer beneath structural elements and also for contiguous and secant or interlocking piled retaining walls.

ADVANTAGES OF CFA PILING 

There are many advantages of using a CFA piling company who will provide guidance and advice, while making sure the service is second to none.

Some advantages of CFA piling are:

• Low noise and vibration
• Low levels of noise, so less disruption
• Depths of 32m
• Diameters of up to 1200mm
• Able to carry heavy or high loads
• Can overcome any ground issue

This piling method enables continuous flight auger piles to be formed in water-bearing ground, without the need for casing or bentonite. It is suitable for constructing piles in most conditions and ground types – gravels, sands, silts, clays and soft rocks and in mixtures of all of these. The original CFA technique allowed for placing a mortar fill but since the early 1980’s CFA Piling has come a long way in terms of uses. 

CFA Piling companies are highly skilled and use only the best machinery to create the best foundations. Midland Piling are no exception. For many years we have been providing advice and expertise, whether that’s in a domestic or commercial capacity.

CFA piles are suitable a foundation piles, for secant pile walls, contiguous pile walls and soldier pile walls.

CFA PILING SPECIALISTS

Here at Midland Piling, our CFA piling specialists will ensure the use of the correct tools and machinery, to fit the requirements of the project in hand. It’s extremely important that you chose the correct CFA piling specialists to create the foundations of your build.

The need to be precise and accurate is vital to creating the sturdiest foundations and we guarantee that you will not be disappointed by the service you receive from our CFA piling specialists. We pride ourselves on providing a fully comprehensive service from beginning to end, a service which has provided us with a reputation which is second to none.

CFA or continuous flight augering, also known as auger cast piling, is a method used in construction to create a concrete deep foundation.

CFA Piling has been used in the United Kingdom since 1966, but its use is relatively new in the United States. A continuous flight auger drill is basically used to excavate a hole then concrete is injected through the hollow shaft under high pressure as the auger is slowly extracted. Reinforcement steel is then inserted after the auger is removed. This creates a continuous pile without ever leaving an open hole. Therefore, creating a strong structure with no chance of failure.

Continuous flight augering can be used to construct a piled wall which can be used as a retaining wall or as shoring during excavation. Once the continuous flight auger (CFA) piles are set with concrete, other shafts are augured between them, being placed into the original piles. The finished result is a continuous wall of reinforced concrete that will aid and protect the work-force during excavation.