老城区控源截污工程管网接驳难点及对策

Difficulties and Countermeasures about Sewer Connection of Source Control and Pollutant Interception Construction in Old Town

水环境治理的关键在于实现流域范围内彻底控源截污,控源截污的核心即是保证新旧管网接驳的效果。为切实提高污水收集率、确保管网建设的效果,首先从设计和施工角度分析了老城区管网接驳遇到的难点,提出了排查、接驳、查漏、兜底的4步接驳思路;随后分析了各类接驳点功能需求,并给出了几种非标检查井的设计大样;最后总结梳理了不同情况采取的不同接驳方式,为老城区管网改造建设及接驳方式提供了参考。

The key to water environment management is to achieve complete source control and pollutant interception in the basin,and the core of source control and pollutant interception is to ensure the effect of connecting the old and new pipe networks.In order to effectively improve the sewage collection rate and ensure the effect of the pipe network construction,we firstly analyzed the difficulties encountered in the connection of the old urban pipe network from the perspective of design and construction,and proposed the four-step connection strategy of troubleshooting,connecting,leakage detection and bottom pocket.Then,the functional requirements of various connection points were analyzed,and the design samples of several non-standard inspection wells were given.Finally,it was summarized that different connection methods adopted in different situations,which provided references for the renovation of the pipe network and connection methods in the old town.