Excavation and pier location marked
The dig out for the footing location and pier placements were completed prior to the helical pier installation.
Close Up of 2 Piers
One square shaft helical pier has the footing cap in place.
3 Flight Helicals
The square helical shafts with three disks are called 3 flight helicals. A mini-excavator with the gear drive head torque the piers through the ground for installation.
Adding Drive Sections As Needed
To get to the proper support depth in the soil, additional drive shafts are added to the 3 flight helical also called the lead section.
Lead Flight Being Embedded
The gear head turns the helical and the disks capture or "bite" the soil and are slowly driven into the soil to a predetermined depth. The 1st disk of the 3 flight lead section is already beneath the soil. The middle disk is about to be embedded next.