HELICAL PIERS

 

Helical piers are the solution to the wide spread occurance of foundation settling. A helical pier slices its way down through the active soil zone, which is the layer on which most building occurs, into deep stable soil, where it will support a designed load. The frequency  of pier placement, is dependant on structure design.  A helical pier is installed by means of a hydraulically powered drive head, which "screws" the pier into the soil, guiding and pulling the shaft with it, as it slices it's way deeper into the soil. Extentions are added to allow deeper penetration, until a desired torque is reached. This torqe, is a result of the dense soil conditions, of the stable soil zone. The bearing capacity of each pier is determined  by the applied amount of torque used to install the pier.

In a retrofit situation, once a pier is installed, the weight of the structure is transfered to the pier, by attaching an underpinning bracket to the shaft, and adjusting it with a hydraulic jack, to allow threaded rods to hold a bearing plate to the foundation.

For new construction applications, a bracket is fastened to the shaft, and is then embedded into the foundation, stem wall, or grade beam, whatever the case may be.

 

Alan Russell Constuction has helical pier capabilities, and will meet with you to discuss your specific needs, or, using your project engeneer or architect's design, set up a schedule, and have our pier crew come and install your "deep foundation."