水力模型辅助合流制系统改造及其运行效果评估  

Reconstruction of Combined Sewer System with Help of Hydraulic Model and Its Performance Assessment

作　　者：张伟[1] 钱静[2] 李田[1] 卢小艳[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]合肥市排水管理办公室,安徽合肥230001

出　　处：《中国给水排水》2015年第7期114-118,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07316-001)

摘　　要：为提高合流制系统排涝能力和削减溢流污染，对合肥市老城区杏花排水系统进行了提标改造，利用水力模型辅助制定和完善改造方案，包括管道、泵站改造等工程措施，并辅助制定泵站合理运行方案。通过对3个典型水文年降雨条件下系统运行效果的模拟评估，发现改造后排水系统的溢流次数较改造前可削减34％～61％，溢流水量可削减25％～31％。在示范工程实施后，对杏花排水系统的实际运行效果进行了后评估，实测结果表明，2012年降雨条件下系统的溢流量较改造前削减了23％，与模型模拟结果接近。该合流制系统改造示范工程及效果评估方法，在保证排涝安全的前提下，充分利用了改造增加的调蓄容积削减溢流水量，可为其他城市类似工程的实施和评估提供参考。To improve the drainage capacity of combined sewer system and reduce the volume of combined sewer overflow （CSO） , several reconstruction measures were implemented in an old combined sewer system located in Hefei. A Series of reconstruction measures, including new constructed trunk sewers, reconstructed pump station and reasonable pump operation rules, were proposed based on the analysis with a hydraulic model. The performance of reconstructed system under the reasonable operation program was assessed for three typical hydrological years with hydraulic model. The results revealed that around 25% to 31% of annual volume and around 34% to 61% of CSO event were reduced compared with the former system. A post-assessment of the performance of reconstructed Xinghua drainage system was carried out to evaluate the performance improvement of the reconstructed project. The results indicated that 23% of CSO volume was reduced by the reconstructed system during 2012, compared with the former system. The actual reduced CSO volume was close to the result predicted by the hydraulic model. The reconstruction method like this project, with a reasonable operation rule set by hydraulic model, could reduce the CSO pollution through full utilization of storage volume created by reconstruction on the premise of assuring drainage safety. It would provide reference for similar reconstruction projects.

关 键 词：合流制排水系统 排涝达标改造 溢流污染 水力模型 运行效果评估 

分 类 号：TU992[建筑科学—市政工程]