The process of a drainage patch repair involves the use of a compressor, an inflatable rubber packer, thin woven textile matting and a 2-compound resin. The 2 resin compounds are mixed together then spread onto both sides of the matting. The matting is then folded and wrapped round the packer (which is covered with a film to prevent the patch sticking to the packer.) The patch is then pushed or pulled into position and the packer is inflated. The patch is then kept in the line under pressure until the resin has cured. The packer is then deflated and removed from the pipe. Finally, a CCTV camera is used to confirm that the patch repair has been installed successfully.
At DAMM, we have the capability to patch over faults found within drains previously surveyed. This is the process of lining the inside of a drain at a particular point where a fault has occurred either over time, or when it’s been initially laid. The first row of images below shows heavy water infiltration within a section of drain. The second shows this same section of drainage post repair, with a 450mm patch installed.
The second row of images again shows a ‘before and after’ scenario, where we repaired a badly broken joint in a 375mm pipe. This repair allowed the our client to have their housing development drainage system adopted (approved) by Scottish Water.