A helical pile is a type of deep foundation used to support structures by transferring loads to deeper, more stable soil layers. It consists of a steel shaft with one or more helical plates, resembling a screw, that are drilled into the ground. This design allows for quick installation and minimizes soil disturbance. Helical piles are commonly used in various applications, including residential buildings, bridges, and telecommunications towers. They are particularly effective in areas with poor soil conditions, as they provide strong support without the need for extensive excavation or concrete footings.