Installation of Helical Piles for Foundations

Examine the structure carefully to determine its foundation footprint. Determine the extent of soil movement and settling from a number of different reference points around the perimeter of the structure's foundation. Mark reference points at each location where a helical pile will need to be installed.

Excavate a section of earth next to the foundation at each reference point. The section will need to be large enough for a worker to function and deep enough to expose the foundation's footing. Notch the foundation footing to prepare it for helical pier installation.

Position the helical lead section, which is the section with the blades, at the point of entry. Drive the lead section into the ground using an excavator with an auger attachment. Bolt an extension section to the lead section and continue to drive the helical pile into the ground. Repeat this process until the optimum level of torque is achieved. Three methods can be used for determining optimum torque level, according to the Magnum Piering website. You may use a hydraulic pressure sensing instrument. You can use shear pins that are designed to break off once a predetermined amount of torque is achieved. Or you can rely on your excavator's maximum turning capacity.

Slide the mounting bracket onto the final exposed extension section and attach the mounting brackets to the notched section of the foundation footing. Level the foundation at each reference point with hydraulic jacks. Secure the brackets to the extension section. Release the pressure on the hydraulic jacks and remove them. Back fill all excavated areas.