5 Uses For Shafts

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.

It is recorded that the helical pier technology is more than 100 years old. Considered to be proven for new constructions and repairs or renovation works, this system is well used. This system is proven to be a very effective solution for foundation repairs especially when the soil condition would need installation of piles to be deep. Especially if the work requires on existing buildings, helical piers would have competitive advantages over other systems.

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. 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. Note that it is not wise to create additional structure on an existing structure.

The torque should be regularly monitored when contractors are installing helicals in each 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.

Note that helical piers can be immediately loaded after installation, meaning there is no curing time after installation. Because helical piers are screwed in or turned, minimal excavation is sufficient. 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.

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. Instead of removing the present foundation that failed and dispose it in a landfill, the helical piers are used over the present foundation, thereby creating a deep foundation system plus contributes to a green environment.

Since there are differences in any project, it is advisable to contact structural engineers to see what is the right method for your project.