A 6′ deep sinkhole opened up adjacent to a stormwater manhole structure. The manhole was in an easement between two single family homes, and maintained by a municipality. Two misaligned joints were visible from the manhole, and were the cause of the sinkhole.
The two misaligned joints were under up to 8′ of cover. The repair had to seal the two misaligned joints and fill the extensive voids around the pipe that resulted from years of erosion.
Chemical grouting to seal the joints in the pipe. An internal form was used to minimize entry of chemical grout into the pipe.
CJGeo large diameter pipe repair crew installed chemical grout to seal the two misaligned joints and fill voids. The repair was completed in less than two hours, with no service disruptions.