Drilling & Grouting

Grouting, as applied to civil and geotechnical construction, involves the injection under pressure of a liquid or suspension into the voids of a soil or rock mass or into voids between the soil or rock mass and an existing structure. The injected grout must eventually form either a solid or gel within the injected voids. The purpose of pressure grouting a soil or rock mass is to improve the strength and durability of the grouted mass and/or to reduce its permeability. Grouting applications relating to permeability reduction include: Reduction of hydrostatic forces acting on the base of water retention structures or tunnel linings Reduction of reservoir water loss, Reduction of erosion of foundations and embankments, Excavation shoring by stabilization, consolidation, and water control Improvement of Mechanical Properties Grouting applications relating to mechanical property improvement include: Enhancement of bearing capacity Consolidation of an overburden of either soil or fractured rocks to facilitate an underground excavation.