Helical Screw Piles are a sound solution for underpinning foundations where soil conditions are less than ideal.
Piling Systems Helical Screw Piles
Although Helical Piles are the right answer for certain scenarios, Ground Improvement methods are often a much more ideal solution, dependent on your specific requirements. That’s when contacting us to advise you on which system to employ for a particular project is always best. That said, let’s dive into what Helical Pile foundation systems are all about. Helical Piles consist of strong galvanized steel sections with a helical lead section screwed deep into the ground until they reach stable soil. These pilings are then attached to the existing foundation.
Helical pile (helical screw piles, helical piers, helix anchor, helical anchor, screw pile, screw anchor, helical pile, torque anchors, auger screw piles, helical torque anchor, helix pile) foundation systems are used not only on new structure construction sites, but are also often utilized to repair existing failing foundations or used in tight-access situations for additions or renovations of existing structures. Although Helical Screw Piles are a sound solution for supporting foundations where soil conditions are less than ideal, there are a number of ground improvement methods that may be more suitable and more reliable than helical’s. Helical piers can be installed to improve the integrity of an existing foundation to allow for greater load-carrying capacity or to upgrade historic structures to new code requirements. Helical piers are twisted or screwed into the ground with a hydraulic drill attached to an excavator. The load capacity can be determined based on correlating the helical pile type to the final installation torque. Full-scale tension or compression load test can then be conducted to verify the installation and confirm the design.
Helical Pile Applications
- Foundation Support
- Constrained Sites
- Soil Anchors
- Boardwalks and Pedestrian Bridges
GeoSolv’s Piling Systems offer distinct advantages for various construction challenges compared to traditional methods such as driven piles (H Piles, Pipe Piles, Precast Concrete Piles), caissons (pier foundations, bored piles, drilled shaft piles), or continuous flight auger piles (CFAs, auger cast piles). To learn if one of GeoSolv’s Innovative Foundation Solutions is right for your project, contact us today for an obligation-free feasibility report or proposal. We are always happy to help you avoid the risks associated with poor soils and deep foundation systems.
Helical screw piles are installed using round pipe or square shaft lead sections (of various diameters/sizes) with one or more helical flights torqued into the ground with pile extensions added to increase length. Helical screw piles can also be gravity grouted using displacement plates to add shaft capacity, with the majority of the load is handled through resistance on the helical’s.
Helical screw piles can be installed for tensile and compressive capacity in many soil types, and installation torque during installation is correlated to pile capacity using industry-tested correlations.