Chemical Grouting: Stopping Groundwater Infiltration at the Service Connections

摘要

Chemical grouting of sewer mains to control groundwater infiltration and exfiltration at joints and connections has become the mainstay of many sewer system maintenance and rehabilitation programs. Lining sewer pipes has often not stopped infiltration, only diverted the infiltrating groundwater to manholes and cut out service connections, allowing annular (void space between the old pipe and new liner) infiltration flow to dump into the lined main. Chemical grouting stops all these service lateral cutout infiltration sources.