淹没出流雨水管道应对内涝设计探讨  

Discussion on Design of Rainwater Pipe Responding to Local Flooding at Submerged Discharge

作　　者：张兆祥[1] 杨帆[1] 王大春 

机构地区：[1]江苏省城市规划设计研究院,江苏南京210036 [2]宜兴市环境监测站,江苏宜兴214200

出　　处：《中国给水排水》2016年第1期83-85,89,共4页China Water & Wastewater

摘　　要：采用SWMM模型进行水动力模拟,研究淹没出流时水位、坡度、管径对内涝的影响,并结合伯努利方程进行雨水管道压力流理论分析。结果表明,河道水位上升严重制约雨水管道排涝能力。淹没出流时管道坡度的增加不但导致施工造价增加,而且基本不能提高管道排涝能力;增大管径会导致施工造价增加,但可有效提高管道排涝能力。淹没出流时影响管道排涝能力的主要是上下游水位差、管径及管道粗糙系数。因此,建议城市排涝应合理控制河道水位;在难以保证自由出流的地区,应增大雨水管道管径应对城市内涝。SWMM was used to perform hydrodynamic simulation. At submerged discharge, the effect of water level, slope and diameter of the rainwater pipe on local flooding was investigated. Besides, Bernoulli equation was applied in the theoretical analysis of rainwater pipe at pressure flow. The results showed that the rise of river water level seriously restricted the drainage capacity of rainwater pipe. How- ever, at submerged discharge, the increase of pipe slope resulted in the increase of cost and had no effect on its drainage capacity. Although increase of diameter gave rise to the increase of cost, drainage capaci- ty of rainwater pipe could be improved at submerged discharge. Water head difference between upstream and downstream, pipe diameter and roughness coefficient had main effect on its drainage capacity at sub- merged discharge. It is important to reasonably control water level for local flooding prevention. Besides, the diameter of the pipe should be increased for local flooding prevention in some areas at possible sub- merged discharge.

关 键 词：内涝 淹没出流 压力流 SWMM 排涝能力 

分 类 号：TU992.23[建筑科学—市政工程]