The Advantages 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.
Helical pier technology is said to be well over 100 years old. Considered to be proven for new constructions and repairs or renovation works, this system is well used. 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.
Unlike deep foundations that require more specialized equipment, in the helical piers, the equipment used are usually smaller, lighter and less specialized. In this case, the cost of moving in and moving out or mobilization is usually lesser than other systems. Tight and confined areas are then more accessible to contractors when installing helical piles because of the specifications, while the larger equipment simply cannot fit.
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. Be aware that it is not wise to add structures on an existing structures close by.
It is advisable for the contractor to be monitoring the torque it is required when installing each helical pier. The contractor usually would know at the end of the installation the load or capacity of each pier since the capacity of each pier is directly related to the torque rating.
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.
Note that with the use of smaller installation equipment like the helical piers, there is a drastic elimination of noise, like no violent hammering or banging.
Aside from being used in new construction projects, another very important advantage of using helical piers is that they can be great alternative for projects with failed existing foundations. 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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