污水截流井的设计优化分析

Analysis of design optimization of sewage intercepting well

目前,合流制污水截流井的设计按照《合流制系统污水截流井设计规程》(CECS 91:97)按满流重力流计算。而在雨天发生溢流情况下,截流管内的水流变为满流压力流工况,使得截流井的实际截流量大于设计截流量。通过工程案例,计算分析了3种形式的截流井的实际截流量和设计截流量的关系,对堰式截流井的计算方法进行了优化讨论,并给出了截流井优化的一些具体工程措施。

At present,the design of combined sewage intercepting well is based on The specification for design of combined sewage intercepting well（CECS91：97）by gravity flow calculation in full flow.However,in rainy day,overflow occurs and intercepting pipe displays full flow and pressure flow,the flow of actual intercepting is greater than the amount of design.The actual intercepting and design flow of the three forms intercepting well were analyzed through engineering cases,making a discussion about the optimization of calculation method of weir intercepting well and some specific measures about intercepting well optimization were given.