Repair of main drains and sewers
There has, in the past, been significant uncertainty on the part of system operators concerning
- what the various repair methods can actually achieve,
- what quality can be attained,
- and what criteria need to be taken into account in tendering procedures, award of contract and on-site supervision.
Repair procedures are used for the rapid, flexible and rational-cost repair of distributed damage, using a large bandwidth of procedures. The same also applies when renovation methods are implemented, since repair procedures are routinely used here for pre-sealing, reprofiling, connection of manholes and the integration of connecting lines. Throughout Germany, around 25 percent of drain/sewer damage is eliminated using specifically “repair” methods.
The independent and impartial IKT – Institute for Underground Infrastructure has already tested repair methods, with the following focuses, in a large range of projects.