Foundation Repair: Installing Segmented Pilings

Scheduled a foundation repair? Below are the steps we take to install segmented pilings:

Phase I – Digging of the Boxes

  • Upon arrival at your home, the supervisor will notify you of our crew’s presence.
  • Supervisor will then designate location of pilings.
  • Breakout of any concrete or paving will begin using a jackhammer.
  • Access holes will be hand dug beneath the grade beam. These holes are typically the size of a doormat.

Phase II – Installing the Piling

Access to the interior is necessary because we need to utilize three to four electrical outlets that are on separate circuits – used to power units that will be driving the pilings.

Concrete pilings are then pressed down with the ram using power units. The weight of the structure will be used to drive the pilings. As one piling is driven, another piling is placed on top of the driven piling.

This process is repeated until the required depth and resistance is reached. The depth of the pilings will be determined by the soil makeup at your residence. This depth can range from 12 feet to over 24 feet.

Remember, frictional resistance is the key factor in driving pilings; therefore depth is not as important as friction/resistance. After the pilings have been driven to the proper friction/resistance point, a piling cap is placed between the driven piling and the grade beam.

Phase III – Lifting of the Slab

After all pilings have been driven and piling caps have been installed, we will begin raising the foundation in stages.

We will raise the lowest portion first and then work around the area to be repaired, and in most cases, we will then work back to the lowest area and raise it more.

Once the lifting supervisor has reached a satisfactory elevation, the tops of the piles will be shimmed under the grade beam. Then the holes will be back filled, concrete patches will be made, and plants will be replanted. A final walkthrough with the homeowner is desired at this time.

Interior Pilings Tunneling

  • An access hole is dug next to the structure (this will be approximately a 4′x4′ box).
  • Utilizing mechanical chipping hammers, our employees dig the tunnel under the structure. The tunnel size is about 4′x4′.
  • After the tunnel is dug, we will place our power plant and rams under the selected grade beams and use the weight of the structure to drive the pilings.
  • This process will be a duplicate of the exterior piling procedure.
  • Once the structure is raised and the leveling/stabilization is completed, then topsoil and clay are placed back in the tunnel and access hole.
  • This is an option to avoid piling installations from inside the house.

 

Contact one our customer service representatives to learn about inspections, assessments and free estimates of your foundation.


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