A helical pile and anchor is an extendable deep pile foundation system with helical bearing plates welded to a central steel shaft. Load is transferred from the shaft to the soil through these bearing plates.
The usage of helical piles or screw piles and anchors in the construction dates back to nearly 200 years. In the 1830s, the earliest version of screw piles were used in England for moorings and foundations of lighthouse structure.
Today, helical piles are used in both compression and tension in construction industry as application of piles & anchor due to the advancements in hydraulic motors and versatility of installation equipment.
(This article comes from HPA Helical Piling editor released)