Curtain Grouting

Curtain grouting is a technique used to construct seepage barriers in or through jointed or heavily weathered rock.  We often utilize curtain grouting beneath dams to mitigate flow under the main impoundment structure, or around tunnels or other underground constructions to mitigate potential inflow.  Curtain grouting is typically completed as a phased operation with holes drilled and grouted in primary, secondary, tertiary, and even quaternary sequences to intersect and block the flow paths within the bedrock mass, and hence achieve the required level of performance.