基于城市“帽子公园”的雨水排水研究——以广州东圃立交上盖公园为例

近年来,随着城镇化的高速发展,人民生活水平日益提升,越来越多的老旧城区面临着拆迁和重建,城市公园也面临着巨大变革。本文以广东省广州市东圃立交市政化改造及加盖工程为例,围绕快速路加盖场地的特殊性,介绍城市“帽子公园”的雨水排水设计,探讨顶盖绿化渗水排水构造层次和公园地表排水的关键设计要点,并根据竖向设计合理划分汇水分区,确定雨水重现期和雨水立管堵塞系数的取值,为其他上盖公园的雨水系统设计提供一定参考。

With the rapid development of urbanization in recent years,people's living standards are improving day by day.More and more old urban areas are facing demolition and reconstruction,and urban parks are also facing great changes.This article takes the municipal renovation and capping project of Dongpu interchange in Guangzhou,Guangdong Province as an example.Focusing on the particularity of the expressway capping site,it introduces the rainwater drainage design of the urban"Cap Park",explores the key design points of the roof green seepage drainage structure and the park surface drainage,and rationally divides the catchwater partition based on the vertical design to determine the rainwater recurrence period and the value of rainwater riser blockage coefficient,which could provide some reference for the design of rainwater systems in other covered parks.