Compaction grouting is the controlled injection of low-slump grout to densify and stabilise loose or compressible soils, including granular deposits, made ground, and collapsed strata.
Injected under pressure through cased boreholes, the grout displaces and compacts surrounding soil, increasing density and bearing capacity while addressing sinkholes and subsurface voids.
Treatment effectiveness depends on ground conditions and may involve multiple injection stages. The technique can be applied in restricted-access areas, including low headroom spaces or from existing basements, and can penetrate hard overlying layers to reach weaker soils below.
