Deep Foam Injection is a fantastic solution to remedy these situations. The process can initially begin with an assessment of the general area using a dynamic cone penetrometer test to locate where and at what depths the weak soils are observed. The next step involves driving rods through the concrete and/or into the soil at the depths where soil repair is required. The high density foam is then injected and flows through the weak soil, taking the path of least resistance. As the material spreads, it begins to expand forming a tree root-like structure. This effectively compacts the soil from within and binds loose soils to create a long-lasting solidified subbase.
Rods are then pulled from the ground and concrete holes are patched. No need for excavating, backfilling, and compaction from the surface. The soil has been stabilized and support has been re-established for concrete slabs, structures, roadways, retaining walls, and more!