What are the Uses of Helical Piers?
Deep foundation of underpinning elements that are constructed using steel shafts with helical flights are known as helical piers. By twisting the shafts into the soil with advanced bearing depth, the torque is also monitored to reach a pile capacity.
The technology of helical pier is 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. The helical system is proved to be advantageous over other systems especially if the work involves existing buildings.
Helical piers foundations need equipment that are just smaller, lighter and less specialized unlike the equipment used in other kinds of deep foundations. With these conditions, the cost of mobilization or the move in and move out, is generally lower compared to the other systems. Because of these features, the contractors can access to tight and confined areas to install helical piles versus the larger equipment which does not fit.
Helical piers are turned in with a torque motor like a wood screw being turned into a piece of wood, and this makes helical piles vibration free when installed that gives it an advantage. Remember that it is not advisable to work on additional structure on neighboring properties with already existing structures.
It is advisable for the contractor to be monitoring the torque it is required when installing each helical pier. 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. Minimal excavation will suffice in a helical pile because it is turned or screwed in. Costs of removal and disposal are saved when installing the piers because there are not spoils to be hauled or removed from the area of construction.
There is not violent hammering or banging to install helical piers and this is a big advantage with regards to the reduction of noise.
Those existing foundations that are failing, can be solved using helical piers, and this is another very important advantage of helical piers, aside from being used in new constructions. 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.
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