Rock/fissure grouting is the injection of high-mobility grout into apertures, joints, and/or voids in rock or soil to create a seepage barrier or stabilize the mass.
Common uses
Reduce conductivity/transmissivity via interconnect porosities in an aquifier
Increase resistance against deformation
Process
Grout is typically injected in isolated stages from boreholes drilled using rotary percussive drills. Reduction in permeability is a function of the grouting material, the rock, and the grout design. Rock grouting is typically performed with general-purpose, ultra-fine, or micro-fine Cement.
Advantages
Can be effective in reducing ground water flows
Reduce pumping costs during basement excavation
Reduced lowering of groundwater levels outside an excavation
Can reduce rock deformation
Quality assurance
Keller has industry-leading knowledge of grout materials and mixes and uses the latest drilling techniques to minimize borehole deviation and maximize efficiency. It can also apply sophisticated computerized control and reporting of the grout injection process.