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.
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.
Common uses
- Reduce conductivity/transmissivity via interconnect porosities in an aquifier
- Increase resistance against deformation
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.
Related projects
Mining
Harte Gold Grout Curtain
Keller installed a rock fissure grout curtain that provided effective seepage control for a tailings dam, enhancing long-term performance at a remote mining site.
