调蓄池提高已建系统排水能力的水力模拟研究

以上海市典型排水系统真如的改造规划为例,分析了调蓄池在提高城市雨水系统排涝能力上的作用。利用水力模型估计了不翻排现有管道、不增加现有泵站规模条件下,提高系统局部排水标准所需调蓄容积,以及利用调蓄池进行系统改造在降低工程费用方面的作用。结果表明,调蓄容积在60m3/hm2时,真如局部地区排水标准能从1年一遇提高到3年一遇,且比翻排管道节省造价50%以上。研究成果可为采用调蓄池提高已建排水系统排涝标准提供参考。

Modeling of applying detention tanks to increase drainage capacity for existing sewer system

Zhenru is chosen as a typical Shanghai drainage system to study the use of detention tank for flooding control in urban areas. Hydraulic model is used to predict required tank volume if current pipe and pumping station size are maintained. The economic advantage is analyzed as well. Result shows that, when using detention tank of 60m~3/hm~2, the key area of Zhenru drainage system can withstand periods of design storm up from 1 year to 3 years, and over 50% construction investment can be saved. The study can provide reference to other drainage system using detention tank for flooding control.