Development of a Partial Repair Process for Sewer Lines to Prevent Ground Subsidence in Urban Areas

Abstract

Ground subsidence and pollutant runoff due to old sewer lines have been considered a major urban problem. Accordingly, the central and local governments are continuously making efforts to repair the sewage lines. In this study, an economical sewage line repair method based on glass fiber was developed, and its performance was evaluated. In the case of physical characteristics, it was found that the new method can secure more stability and strength compared to the existing sewer pipe repair method. In addition, it was found that economic efficiency was effectively improved by more than 10% in sewage pipes of 300 mm or more and 28%, which is the maximum value in 900 mm pipes, compared to the existing, similar process. In particular, since 70% of domestic sewer pipes are composed of pipes with a diameter of 300 mm or more, the partial repair method developed through this study is expected to be economically beneficial for sewer pipe repairs in the future.