Shaft Diameter

Pile Size

Literature & Resources

Helical Piles

Helical piles offer several benefits.  They can reach practically unlimited depths (150+ feet) for areas with deep soft soil conditions.  Their slender shaft and large bearing plates are ideal for expansive/collapsible soils.  They install easily in high groundwater tables.  Installation can be done in all seasons including cold weather and through frozen ground (predrilling may be needed).  A very important factor when working near energized lines is that helical piles can be installed in short sections with low-headroom using compact equipment.  Even when geotechnical data is limited, it is okay to use helical foundations because final torque can be used to verify capacity, and they can be proof tested in the field with pull-out tests.

Another benefit of helical piles is they are installed with comparatively small equipment with low noise nor vibration.  The installation of helical piles  is rapid and generally involves just one piece of equipment.  Much less site preparation is needed for smaller, lighter equipment.  They are easy to transport to remote areas with limited access.  Foundation systems can be designed using helical piles that minimize or eliminate the need for concrete or grout.  Foundations and anchors can be loaded immediately (no cure time) reducing total foundation schedules.  They do not produce drill spoil and involve minimum ground disturbance which helps maintain work area cleanliness and safety.  Smaller work crews and no need for cranes or overhead rigging contributes to the overall safer installation as compared with other foundation categories.