Helical Pier Installation
Concrete Jack’s foundation repair experts are factory trained installers of Earth Contact Products’ line of foundation repair products, including helical piers. Helical piers are hydraulically screwed into the ground until they reach a layer of solid soil which can support the weight of the structure. After the solid layer is reached, the piers serve as a point to lift the foundation, bypassing the unsuitable layers of soil. Helical piers are also called screw piles, helical piles, screw piers and helix piers.
How Helical Piers Work
Helical piers use the area of the helices to distribute the weight of your foundation to the layer of soil they are screwed into. This then allows for lifting of the foundation. A hydraulic motor is used to screw the helical piles into the ground, and the resistance to turning (torque) is used to calculate the bearing capacity.
Uses for Helical Piers
Helical piers, which are sometimes called screw piles or helical piles, are used both during new construction and during repair of existing structures. For new construction, helical piers can be installed to ensure a solid foundation for a new building being built over weak soils. Helical pier installation during new construction is generally fast, quiet and inexpensive, and the piers may be loaded immediately after installation. For repairs, helical piers are installed below compromised areas of a foundation by screwing them into the ground, then transferring the weight of the structure to the pier. Because helical piers are screwed hydraulically into the ground, they can be installed to high load capacities even under lightweight structures, or before a structure is even built. A prime example of this advantage is installing helical piles under an existing foundation before adding an additional floor or other significant increase in loading.
Foundation Repair with Helical Piers
Before helical piers are screwed into the ground, the footer is exposed, and notched. Next, the crew hydraulically screws the pier into the ground. The weight bearing capacity of the pier is calculated from the force it takes to turn the pier. When enough resistance is met, the pier has reached suitable bearing strength from the soil. The top of the pier is cut to the correct height, and a lifting bracket is installed between the bottom of the footer and the pier’s top. Lifting is then completed using hydraulic jacks. The piers are secured, the lifting jacks are removed, and the access holes are backfilled.
New Construction Helical Piers
Helical piers for new construction are generally installed for two reasons. First, a new building to be built on soft or weak soils. Helical piers in this case allow for transferring the load of the foundation to strong, deeper layers of soil. The second scenario is buildings being added onto, when the soil under the foundations may not be able to hold up the increased weight of the structure.