Helical piles (also known as helical piers) are used to repair an existing structure and also for new construction in place of micropiles, caissons, geopiers or other deep foundation systems. They can also be used instead of an over-excavation. The helical pile can be both time and cost effective.
When helical piles are used to repair an existing structure, they are “screwed” into the soil until a pre-determined torque is reached. A bracket is then placed on the steel shaft and positioned under the footing of the structure, transferring the load of the structure to the helical piers. The structure can then be stabilized or lifted back level.
Helical Piles have been in use for almost 200 years, and more recently have become more popular with engineers and contractors and used often in please of more costly alternatives.
Advantages:
- Lead sections and extensions can be configured to achieve design depth and capacity
- Minimal excavation required around foundation area
- Installs quickly with small or handheld equipment
- Vibration-free installation
- Piles can be driven throughout the year
- Installs in areas with limited or tight access without generating spoils