城镇雨水系统设计标准的探讨

The discussion of urban rainwater system design standards

根据水力学理论,对雨水管道排放雨水的水力情况进行了分析,定性地确定了设计地面高程与市政雨水受纳水体最高水位的关系,将水力学管道流量公式与国内传统雨水流量计算公式相结合,进一步推出了相关计算公式,并以武汉市为例,运用该公式提出了武汉市市政雨水系统暴雨重现期P=3年～5年的标准,并阐明了“大管径,小坡降,低流速”设计思路的优势.

According to the theory of hydraulics, it analyzed drainage discharge of rainwater, and qualitatively determined the relationship be- tween ground elevation and the highest water level of receiving rainwater. Then combining the hydraulic pipe flow formula with domestic traditional flow calculation formula for rain, it introduced the related hydraulic formula, taking Wuhan city for example, it put forward new standards of the formula of Wuhan municipal rainwater system-P = 3 a- 5 a, and clarified the advantage of the design thinking-＂ big pipe, small gradient, low velocity＂.