HELICAL SCREW PILES
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.
