Helical Anchors, also known as a screw pile, screw anchor, or helical pile are used to secure foundations and sea walls where there is limited area for traditional tie backs and Deadman systems. Helically shaped steel plates are attached to a central steel shaft with a round or square cross-section. The steel plates’ thickness, number, diameter, and helices position are determined by the restrained or supported structure’s minimum design life, the environmental corrosion and geotechnical parameters, and the design load requirements.
It is also used in environmentally sensitive areas to minimize damage. On small zero lot homes in South Florida, especially with existing pools and seawalls, this is an ideal choice to minimize the impact when building a new sea wall.