Compaction Grouting

Compaction grouting is used in situations where soil densification is needed to support a new structure or amend the soil under an existing building.

Very stiff low-slump grout is pumped under high pressure into specified areas. The grout creates a ball-type mass that pushes on the soil around it. The injection point typically begins at the bottom working toward the surface and is repeated in each upward movement to a predetermined PSI.

Between these compaction-grouted piles, the soils are densified to a greater PSF. Surface-down injections are performed in shallower applications. Typically all jobs of this kind are done according to specifications designed by a geo-technical engineer.