Helical piles provide proven high-capacity solutions for deep foundation applications such as expansive soils, high water tables, fill areas and other areas where unstable soils require piling.
A helical anchor/pile is an extendable deep foundation system with helical bearing plates welded to a central steel shaft. Anchors are used in tension applications and piles are used in compression applications. Load is transferred from the shaft to the soil through these bearing plates. Central steel shafts are available in either Type SS (Square Shaft) series or Type RS (Round Shaft) series. The Type SS series are available in 1-1/4″ to 2-1/4″ square sizes. The Type RS series are available in 2-7/8″ to 4-1/2″ diameter sizes. Type SS-RS combinations are also available for compression applications in soil conditions where dense/hard soils must be penetrated with softer/loose soils above the bearing strata.
Segments or sections are joined with bolted couplings. Installation depth is limited only by soil density and practicality based on economics. A helical bearing plate or helix is one pitch of a screw thread. All helices, regardless of their diameter, have a standard 3″ pitch. Being a true helical shape, the helices do not auger into the soil but rather screw into it with minimal soil disturbance. Helical plates are spaced at distances far enough apart that they function independently as individual bearing elements; consequently, the capacity of a particular helix on a helical anchor/pile shaft is not influenced by the helix above or below it.
Our helical pile system is a segmented deep foundation system with helical bearing plates welded to a central shaft. Load is transferred from the shaft to the soil through helical bearing plates. As a result of their true helical shape, the helices do not auger into the soil but rather screw into it with minimal disturbance.
The first section, called the lead section, contains the helical plates. The lead section can consist of one to four helices. If required, additional helices can be added with the use of helical extensions.