Remove a sewer collapse on a 150mm sewer 6 meters deep as it could not be excavated as under a retaining wall.

Site difficulties

Depth of the sewer in the highway and its close proximity to a large retaining wall.

Solution

Employ specialist cutting solutions to carefully remove the broken pipework and debris and clean away the pipework and silt, then install a specialist patch that wouldn’t over expand and cause the pipework to fail further.