Continuous helical and helical piles offer an environmentally friendly foundation solution aligned with future emission regulations, making them ideal for the housing market.

This thesis proposes design guidelines to support industry standardisation. Installation effects were found to significantly impact performance, with improper procedures reducing compressive capacity by up to 67%. An installation log— continuous monitoring of installation torque, advancement rate, and rotational speed—is recommended. A modified torque-to-capacity correlation was developed, improving predictions across torque ranges.

Additional methods (geostatic, CPT-based and data-driven) were analysed, with partial safety factors in accordance with Danish and European building standards. A method to predict required installation torque was also proposed to ensure feasibility of installation and choice of installation equipment.

For a copy of the thesis, please email inst.build.phd@build.aau.dk