透水砖铺装堵塞稳定阶段颗粒物冲刷特征及影响因素  

Characteristics and Influencing Factors of Particulate Matter Flush in Stable Clogging Stage of Permeable Brick Pavement

作　　者：王泽熙 王建龙[1,3] 吕宗霖 王雪婷 孙铮 贾高峰 WANG Ze‑xi;WANG Jian‑long;LÜZong‑lin;WANG Xue‑ting;SUN Zheng;JIA Gao‑feng(Key Laboratory of Urban Stormwater System and Water Environment,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;China Airport Planning&Design Institute Co.Ltd.,Beijing 100029,China;Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Guangzhou Urban Drainage Co.Ltd.,Guangzhou 510000,China;Beijing Drainage Group Co.Ltd.,Beijing 100034,China)

机构地区：[1]北京建筑大学城市雨水系统与水环境教育部重点实验室,北京100044 [2]民航机场规划设计研究总院有限公司,北京100029 [3]北京建筑大学北京市可持续城市排水系统构建与风险控制工程技术研究中心,北京100044 [4]广州市城市排水有限公司,广东广州510000 [5]北京城市排水集团有限责任公司,北京100034

出　　处：《中国给水排水》2023年第21期123-130,共8页China Water & Wastewater

基　　金：国家“十四五”重点研发计划项目(2021YFC3001400)。

摘　　要：针对透水砖铺装堵塞过程及其雨水径流污染问题,采用人工模拟降雨实验,系统研究了透水砖铺装堵塞过程中渗透系数的变化规律,及其堵塞稳定阶段不同降雨重现期、颗粒物初始负荷、颗粒物粒径条件下雨水径流中颗粒物的冲刷规律。结果表明,随着颗粒物累积负荷的增加,透水砖铺装的渗透系数逐渐降低并趋于稳定,整个过程可分为线性衰减和指数衰减两个阶段。降雨重现期、颗粒物初始负荷、颗粒物粒径对透水砖铺装表面颗粒物的冲刷规律具有重要影响,且随着降雨重现期和颗粒物初始负荷的增加、颗粒物粒径的减小,雨水径流中颗粒物累积总量逐渐增加。不同实验条件下,雨水径流中SS浓度冲刷过程可分为初期快速降低阶段、峰前增加阶段和峰后指数衰减阶段,且初期冲刷现象不明显,控制雨水径流中70%~80%的颗粒物累积总量需要控制40%~60%的雨水径流体积,存在明显的“峰值冲刷”现象。This paper investigated the change of permeability coefficient during the clogging process of permeable brick pavement(PBP),and the flush characteristics of particulate matter in runoff under different rainfall return periods,initial loads of particulate matter and particle size distribution in the stable clogging stage by artificial rainfall experiment,so as to alleviate the problems of PBP clogging and runoff pollution.With the increase of particulate matter cumulative load,the permeability coefficient of PBP gradually decreased and tended to be stable.The whole process could be divided into linear decay period and exponential decay period.Rainfall return period,initial load of particulate matter and particle size had important effects on the flush characteristics of particulate matter on the PBP.With the increase of rainfall return period and initial load of particulate matter and the decrease of particle size,the gradual increase of the total accumulation of particulate matters in runoff was observed.Under different experimental conditions,the profile of suspended solids(SS)concentration in runoff during the flush process could be divided into initial rapid reduction stage,pre‑peak increase stage and post‑peak exponential decay stage,and the initial flush phenomenon was not obvious.To control 70%-80%of the total accumulated particulate matter in runoff needed to control 40%-60%of the runoff volume,and there was an obvious“peak flush”phenomenon.

关 键 词：透水砖铺装 颗粒物 堵塞 渗透系数 峰值冲刷 

分 类 号：TU992[建筑科学—市政工程]