Compaction Grouting uses controlled displacement to increase the density of soft or loose soils. It is typically used for settlement control, structural re-leveling, and remediation of sinkholes. A small diameter (2” – 4”) steel casing is advanced through the zone to be improved, and a stiff mortar-like grout is injected at high pressure to displace and compact and the surrounding soils. Pumping is continued as the grout casing is withdrawn, forming a larger diameter (12” – 18”) column of interconnected grout bulbs. As they form, they intensely compact the soil around them and increase the soil’s bearing capacity.
Compaction piles can be formed in much the same manner to create a continuous structural support for foundations.
Due to relatively small injection pressure ports, compaction grouting can be performed with minimal disruption to building-use, without interference to other existing construction programs.
In our 25 years of geotechnical specialty work, Rembco has used compaction grouting to improve the ground beneath settling structures, provide excavation support, block the flow-path of viscous liquids, fill rock cracks, construct underpinning, densify footing soils, remediate threatening sinkholes, and re-level roads, bridges, towers and existing structures.