Compaction & Cap Grouting

Compaction grouting is the process of injecting a low mobility, low slump grout to improve the density of loose, granular soils. The grout is injected through the inside of a drill pipe that is slowly removed in lifts as the specified pressure or volume is met. As each zone is pressurized the surrounding soils densify and create a grout column surrounding the drill pipe. This type of grouting is typically performed in conjunction with Cap grouting to remediate the effects of sinkholes and repair the damaged overburden soils in Karst conditions. Cap grouting is the process of injecting a cement-based grout and creating a cap over a sinkhole void to prevent further soil loss.