应用线内调蓄提高已建管网排涝标准的方案设计  

Design of In-line Storage Tanks for Improving Flooding Control Ability of Existing Sewer Systems

作　　者：李田[1] 董鲁燕[1] 张伟[1] 

机构地区：[1]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2014年第5期99-103,108,共6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：以合肥市BH排水系统为例,在利用InfoWorks CS软件建立并率定系统水力模型的基础上,对线内调蓄池的位置选择与容积初估、模型评估与修正等进行了探讨,并提出了旨在提高系统排涝能力的线内调蓄合理方案。结果表明,在1年一遇设计暴雨条件下,设置线内调蓄后,洪峰流量由调蓄前的1.52 m3/s降到1.04 m3/s,洪峰出现时间延后约30 min,线内调蓄对调控区域的洪峰削减效果明显,可有效提高已建系统的排涝标准。通过流速分布分析和评估,发现调蓄后系统内管道流速虽有一定程度的降低,但可在降雨日保证不淤流速。以上研究可为采用线内调蓄提高已建排水管网排涝标准的方案规划与设计提供重要借鉴。Taking a drainage system in Hefei City as the research case, the location selection, volume estimation, performance assessment and revision of in-line storage tanks based on a sewer hydraulic model built using InfoWorks CS were discussed. An optimal solution of in-line storage for improving the drainage capacity of the sewer system was proposed. The results revealed that the peak flow of sewer sys- tem was reduced from 1.52 m3/s before in-line storage to 1.04 m3/s after in-line storage for the one-year design storm. The appearance time of the peak flow was delayed for 30 minutes. In-line storage could ef- fectively shave the peak flow and improve the drainage capacity of the existing sewer system. The velocity distribution analysis and assessment showed that a slight reduction of velocity in sewer system was observed, but the flow velocity exceeded the non-depositing flow velocity during design storm period. The findings provide reference for planning and designing the schemes to improve the drainage capacity of existing sewer systems using in-line storage tanks.

关 键 词：排水管网 达标改造 线内调蓄 排涝标准 水力模型 

分 类 号：TU992[建筑科学—市政工程]