基于海绵城市理念的市政给排水设计

若市政给水引入点的管道位置分布混乱，会导致市政给排水流量受限，增加由于暴雨等极端天气事件或其他突发情况造成的城市损失。因此，基于海绵城市理念，优化市政给排水工程。根据给水引入点排布市政管道位置，计算市政给水余压供水区间，在区间范围内确定了市政排水管出户标高，根据市政排水管出户标高，确定了喷头流量总和与管道作用面积之间的关系，设计了平均配水量配水支管，折算每段配水支管的流量，计算了配水支管间的流量系数，以此完成市政排水设计。分割项目工程系统管道内的机械样板空间，参照管线完成水平管道施工。结果分析表明：同等效段内，基于海绵城市理念的市政给排水加压设备耐久度更高，管道排水流量较大，海绵城市理念与市政给排水设计过程的融合效果得到保证。

Research on Municipal Water Supply and Drainage Design Based on Sponge City Concept

Due to the fact that a disorderly pipeline location at the municipal water supply inlets leads to the restriction of municipal water supply and drainage flow, as well as an increase of the urban losses brought about by such extreme weather events as rainstorm or other emergencies, it is therefore advisable to optimize municipal water supply and drainage engineering based on sponge city concept. According to the layout of municipal pipelines at the water supply inlet points, the residual pressure water supply interval of municipal water supply can be calculated, with the outlet elevation of municipal drainage pipes determined within the interval range. The relationship between the total flow rate of nozzles and the area of pipeline action can be determined on the basis of the outlet elevation of municipal drainage pipes. With the average water distribution branch pipe designed, the flow rate of each section of the water distribution branch pipe can be converted, followed by a calculation of the flow coefficient between the distribution branch pipes so as to complete the municipal drainage design. Meanwhile, the mechanical template space is to be divided inside the project engineering system pipeline, with the horizontal pipeline construction completed according to the pipeline. The result analysis shows that within the same efficiency range, the municipal water supply and drainage pressurization equipment based on the sponge city concept are characterized with a higher durability and a larger pipeline drainage flow, thus guaranteeing the integration effect of the sponge city concept with the municipal water supply and drainage design process.