南方某山地城市清污分流改造要点探讨

Discussion on Key Points of Clear Water and Sewage Separation Reconstruction in a Southern Mountainous City

摘要:

随着我国城市更新进程有序推进，越来越多的山区城市亟待完成合流制分流整治，因此总结具有山地城市特点的清污分流改造经验变得尤为重要。结合南方某山地城市清污分流改造工程经验，针对山地城市特有的山水混接问题，系统性地提出了山区清污分流的总体整治思路，并具体阐明前期勘察阶段需要把控的物探检测、水质水量分析、暗渠检测及入户排查等关键要点，根据工程特点讨论了清污分流、雨污分流、新建污水管网、改造截污干管的溢流井及智慧水务建设等工程难点解决方案。项目的实施将减少城市污水系统的外水入侵量，削减沿河截污干管溢流污染，为同类型山地城市的清污分流改造提供了可借鉴的参考思路。

Abstract:

With the orderly advancement of urban renewal in China, more and more mountainous cities are in urgent need of completing the combined sewer system for separation and reconstruction. Therefore, it is vital to summarize the experience of sewage and clear water separation reconstruction with the characteristics of mountainous cities. Combined with the experience of the sewage and clear water separation reconstruction project in a southern mountainous city, and aiming at the unique problem of mixed mountainous waters in mountainous cities, an overall reconstruction idea of the clear water and sewage separation in the mountainous areas is systematically proposed. And the key points required to be controlled in the early survey stage, such as geophysical exploration and detection, water quality and quantity analysis, underground channel detection and household investigation are specifically clarified. According to the engineering characteristics, the solutions to engineering difficulties are discussed, such as separation of clear water and sewage, separation of rainwater and sewage, construction of new sewage pipeline network, reconstruction of overflow well of main sewage interception pipeline and construction of smart water utilities. The implementation of the project will reduce the amount of external water intrusion into urban sewage systems, and cut down the overflow pollution of the main sewage interception pipelines along the river, which provides a reference idea for the separation and reconstruction of clear water and sewage in the similar mountainous cities.