Repair and refurbishment technologies for inspection shafts in deep-level sewer tunnels

摘要

Purpose - This paper aims to investigate the condition and select a repair procedure for a damaged sewer in Kharkiv, Ukraine. Design/methodology/approach - Inspection shafts are critical objects in the sewerage networks and are exposed to the strong influence of destructive processes, which are mainly corrosion of concrete structures, penetration of surface water inside structures, static and dynamic loads generated by truck transport, deviations from the codes and errors in construction, poor quality of the shaft wall surface, aggressive biological environment and ground subsidence. Therefore, selecting the optimum repair technology is of current interest. Findings - The problems of repair and refurbishment of inspection shafts in deep-level sewer tunnels were considered. The technical and technological solutions using profiled polyethylene, reinforced slag cast panels, ceramic bricks and protective coatings are given. The advantages and disadvantages of the proposed technologies and examples of their practical application are shown. Originality/value - This study performs reconstruction and strengthening work for a damaged section of the inspection shaft without shutdown.