Bedlam Foundation & Concrete Lifting Case Studies: Helical Piers & Pressure Grout - Residential, Choctaw, OK

Pressure grouting driveways is usually fairly straightforward, but this particular driveway presented a unique set of obstacles, the first of which being its shear size - lifting and leveling an almost 1,500 square foot area would require almost an entire trailer's worth of material. In addition, at the driveway's west end, a steep hill leads down into a drainage ditch. Reinforcement would need to be added at this edge in order to keep the concrete slabs from moving outward, but the grade of the hill would complicate the installation of piers.

Bedlam Concrete Lifting first installed five FSI HP288 helical piers against the west end of the driveway, in order to ensure that the concrete slabs would only move vertically when pressure grout was injected underneath them. Because of the grade and height of the hill, it was determined that using an excavator to drive the piers from the driveway's surface would be the most effective approach to the installation. After the piers were driven to depths of approximately eight feet and secured to the driveway using light-duty brackets, almost 50 holes were drilled in the concrete's surface, where pressure grout was injected until the desired lift was achieved.