Helical Piering in a nutshell: Helical Piering is a method of lifting or stabilizing a sinking or settling foundation. Your structure relies on the the footing for support, as well as establishing a level platform for building. When the footer stability is compromised, Wall Anchors of Northern Ohio can install Piers much deeper, in a more solid, adequate lifting soil. Once piers are installed in a load bearing stratum, the footer / foundation can be lifted and supported back to normal.
Using the lifting bracket and jacking system, the foundation can be lifted. Once the foundation is lifted back to the desired result, it can then be locked into place. If you have more questions regarding this procedure, please contact one of our consultants for a more detailed explanation.
Wall Anchors of Northern Ohio's piers consist of one or more helical-shaped circular steel plates welded to a central steel hub. The depth of the helical steel piers into the soil is typically extended by adding one or more steel hub extension shafts mechanically coupled together to form one long, continuous pier. Extensions can be with or without attached helical-shaped steel plates. Each helical steel plate is 3/8-inch or 1/2-inch thick and has an outer diameter ranging from 6 to 15 inches.
The central steel hub of lead sections and extension sections is round cornered square (RCS), solid steel bars. RCS bars include 1-1/4, 1-1/2 or 1-3/4 inches square sizes.
Wall Anchors of Northern Ohio's piers are available in single, double, triple helix configurations. Helix sizes and bar sizes may be custom ordered in any combination as required for the application. Extension bars are available in 3, 5, 7 foot lengths.
Please take some time to review the graphic below
In this graphic you can see the foundation that sits on unstable soil. The lifting bracket that is installed, has a 25,000 pound lifting capacity per unit. The units are normally placed in 6 foot intervals.
The Helix is hydraulically driven into the soil and locks out at a certain holding strength, depending on the project and type of foundation being lifted.
The installation process is a very important aspect of this type of repair. When the Helix is installed it is spun through the soil, not pounded causing massive vibration and further damage to the foundation. The normal installation has a very minimal soil disturbance below the footer level.