Mines, Tunnels & Subway Grouting
The injection of a multi-component grout or an expansive hydrophobic foam grout into various rock strata, soil and voids creates a grout curtain to stabilize the soil, stop the infiltration and provide structure support.
Injection grout is pumped under pressure from a delivery system that is either above ground or located near the grouting area. This liquid mixture is pressurized through the rock, or soil, or structure wall filling voids and creating a watertight grout/soil matrix preventing groundwater infiltration/exfiltration and potential soil erosion. The grout reacts within 30-60 seconds to seal off infiltration and are controllable from the delivery system. Grouting pressures measured at the injection point are monitored to insure that the materials are pumped at higher pressures than the groundwater pressures.