Problem: Concrete Patio has a large void against the foundation, one section has fallen, and animals are living underneath.
Evaluation: Backfill from the foundation construction has settled and this process was possibly accelerated by poor gutter drainage. The section of concrete that has fallen was added at a later date and not pinned to the foundation with steel reinforcement bar.
Strategically drilled small holes through surface of the patio.
Slurry viscosity was determined by size of the void to achieve optimum flow and lifting footprint for the fallen section.
As the slurry was injected into the void further compacting the backfill as it was being filled.
The fallen section was then lifted back into place.
Further recommendations to this customer include the following:
Seal expansion joints in the patio with a self-leveling concrete caulk
Address any gutters or drainage around the home that could be causing water stand close to the foundation backfill. This may include raising the ground level back up around the foundation with fill dirt.