Abstract:The sewage transmission trunk line in Southern District of Shanghai (hereinafter referred to as the "south trunk line") has been built for a long time, close to the design life, and there are great potential safety hazards. Among them, the tangzijing section (Bocheng road yiguozhan Road) between the No. 1 pump station and No. 3 pump station of the south trunk line is limited by the surrounding construction conditions and does not have the feasibility of new route selection, so the trenchless repair technology needs to be used to repair the old box culvert. Taking the repair project of large drainage box culvert in tangzijing section of south trunk line as an example, this paper combs the trenchless repair technology of box culvert, so as to provide reference and reference for similar projects.
