What are the Uses of Helical Piers?
Known as helical piers are deep foundation underpinning elements that are constructed with the use of steel shafts with helical flights. By twisting the shafts into the soil with advanced bearing depth, the torque is also monitored to reach a pile capacity.
Helical pier technology is said to be well over 100 years old. It is considered as a proven system in new constructions and repairs or renovation works. Where the soil condition requires deep piles for installing foundation repair, this system is said to be a very effective solution. Helical piers as compared to other systems will prove to be more advantageous especially if the work involves existing buildings.
Equipments that are used in helical piers foundation are usually smaller, lighter and less specialized compared to the equipment used in deep foundations. In this case, the cost of moving in and moving out or mobilization is usually lesser than other systems. These conditions allow contractors then to go in tight or confined areas in helical piles installation as compared to the larger equipment which cannot fit into the area.
Helical piers are also advantageous in the sense that they are installed vibration free because they are turned in with a torques motor similar to a wood screw that is turned into a piece of wood. Remember that it is not advisable to work on additional structure on neighboring properties with already existing structures.
The torque of each helical pier should be continuously monitored by the contractor during installation of the helicals. Because the capacity of each pier is directly related to the torque rating, the contractor will know the load or capacity that each pier can support.
Helical piers installation does not require curing after installation and they can immediately be loaded. Also, there is minimal excavation required for helical piers that are turned on or screwed in. Another advantage of helical piers is that you save on costs of removal and disposal because there are not spoils to be removed from the site.
There is not violent hammering or banging to install helical piers and this is a big advantage with regards to the reduction of noise.
There is another very important advantage of using helical piers and that is they are great solution to projects with existing foundation that failed, on top of being used for new construction projects. Contractors also use the helical piers under the existing foundation, rather than remove and disposal it in a landfill, and when this is done, there is a deep foundation system that is created contributing to the green environment.
A word of advice, it is better to check structural engineer or repair foundation service to see which job is the right one for your project, especially each project could be different with various factors that will have an effect on the construction.