雨水口布置对海绵道路排水和径流控制的影响

Impact of Rainwater Inlet Layout on Drainage and Runoff Control in Sponge Road

摘要:

结合典型暴雨雨型，通过水力计算，分析路面雨水口和路缘石开口的不同组合布置方式对海绵道路雨水径流外排路径分配的影响。结果表明，随着双篦雨水口数量的增加，雨水径流汇入路缘石开口的比例减少。当雨水口间距大于90 m时，路面排水设施难以有效应对5 a一遇2 h暴雨。但当雨水口间距小于60 m时，汇入下沉绿地的初雨径流比例低于53.9%，不利于下沉绿地发挥其源头减排功能。

Abstract:

Combined with typical rainstorm patterns, through hydraulic calculation, the impact of different combination layouts of pavement rainwater inlets and curbstone openings on the distribution of rainwater runoff outflow paths on sponge roads is analyzed. The results indicate that with the increase in the number of double-grate rainwater inlets, the proportion of rainwater runoff flowing into the openings of curb stones decreases. When the spacing between rainwater inlets exceeds 90 m, the pavement drainage facilities are unable to effectively deal with 2-hour torrential rainstorm that occurs once every 5 years. However, when the spacing between rainwater inlets is less than 60 m, the proportion of initial rainwater runoff entering the sunken green space is below 53.9%, which is not conducive to the role of sunken green spaces in reducing emissions at the source.