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HELICAL SCREW PILES

As with all foundations, helical screw piles are designed and specified by a structural engineer based upon the prevailing ground conditions and the nature of the building being constructed.

Helical Screw Piles, also known as screw piles, are constructed using steel shafts with helical flights (helix/helices) of various sizes to suit the site specific ground conditions. The piles are galvanised to help prevent deterioration.
Piles are installed using standard tracked with a torque motor attachment which monitors the torque achieved during installation to verify the design.
Helical Piles are installed to the predetermined bearing strata by rotating the steel shafts with the torque motor attached to the excavator. Multiple steel sections can be connected via a bolted connection and sections are added to complete the total pile depth.

Helical Screw Piles are particularly useful in certain situations such as around tree roots where they almost eliminate any damage compared to other foundation methods, or in contaminated ground. As they displace the soil whilst being installed rather than excavating or ‘drilling’ it out. The final torque reading is taken over the last 1m of advancement to ensure the pile is achieving the required design before terminating at the correct datum level.

Although we aren’t structural engineers, we do work closely with a number of them and can assist in the process to ensure that a cost effective design is achieved. At Terra Contracts, we have an in house setting out engineer and a state of the art robotic total station to ensure that our work is set out and installed with a very high degree of accuracy. Terra Contracts will ensure your foundations are fitted accurately and exactly as designed
Helical Screw Piles

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