About the project
Bogotá, Columbia, has an estimated 8,000 km of sewers, most of which are coming to the end of their service life. Most sub-surface infrastructure is buried deep beneath highly populated areas and narrow streets, making traditional open-cut repair or replacement difficult or disruptive. For this reason, a trenchless approach is preferred.
Bogotá's first trenchless program included the rehabilitation of a twin box culvert classed as critical infrastructure as it is used to drain stormwater from an area prone to flooding. Channeline was selected as the lining system and technical support supplier for the rehabilitation of this structure measuring 861 m (2,825 ft) long, and 2.5 m x 1.70 m (100 ft x 68 in) diameter, with a curved section and located directly underneath a four-lane highway.
The bespoke nature of Channeline products meant that the liners could be designed and manufactured to precisely fit the shape and size of the existing structure. The liners' internal diameter was 2.32 m x 1.52 m with 38mm wall thickness. Production of the liner began in June 2019, and installation began in September.
Installation was performed from one access shaft, minimizing disruption and allowing for minor traffic redirection. The project was completed in February 2020 and was deemed a success by both the Bogotá Waterboard and the Contractor Alliance.
