摘要
海绵城市建设中,道路雨水径流通过路沿石开口引入到路边生物滞留设施。相对于平原城市,山地城市道路纵坡较大,雨水收集效率较低。该文通过具体案列,分析评估不同坡度下路沿石的开口长度、下凹深度、开口间距、开口宽度等关键参数。研究表明,相比于平原城市,山地城市大纵坡道路开口处更应该设置下凹;除局部低洼区域,开口加密布置对收水效率提升作用不大。按照道路排水重现期设计的路沿石开口,针对中小降雨强度设计标准的生物滞留设施的收水效率较高,理论上可收集汇水范围内的全部设计降雨。
In the construction of sponge city,rainwater runoff on roads is guided to the roadside bioretention facility through the stone opening on the roadside.Compared with plain cities,mountainous cities have larger longitudinal slopes and lower rainwater collection efficiency.This paper analyzed and evaluated key parameters such as the opening length,the concave depth,opening spacing,and the opening width of curbs under different slopes through specific cases.Studies have shown that,compared with plain cities,the openings of roads with large longitudinal slopes in mountainous cities should be more concave;Except for low-lying areas,the dense arrangement of openings has little effect on the improvement of water collection efficiency.To design curb openings in accordance with the recurrence period of road drainage,and to establish standard bioretention facilities for small and medium rainfall intensities have higher water collection efficiency,and can theoretically collect all designed rainfall within the catchment area.
作者
敖良根
杜江
尹洪军
陈怡汀
陈圆
Ao Lianggen;Du Jiang;Yin Hongjun;Chen Yiting;Chen Yuan
出处
《重庆建筑》
2022年第S01期442-445,共4页
Chongqing Architecture
关键词
海绵城市
山地城市
生物滞留
道路纵坡
路沿石开口
收水效率
sponge city
mountainous city
bioretention
longitudinal road slope
roadside stone opening
water collection efficiency
