典型透水混凝土铺装对降雨污染的控制效果研究

Effect of Typical Pervious Concrete Pavement on Rainfall Pollution Control

摘要: 透水混凝土铺装是海绵城市建设中的重要组成部分，本研究搭建了不同面层厚度的透水混凝土铺装试验装置。通过模拟降雨的形式，考察了透水混凝土铺装对下渗雨水水质的影响。结果表明，透水混凝土铺装对TP和SS有较好的去除效果，去除率基本稳定在90%以上；COD在降雨初期会增高，但随降雨历时的延长又逐渐降低；雨水中的TN通过透水混凝土铺装后会有一定的降低，但降低的幅度随降雨历时延长而逐渐减小，且该装置对NH₄-N无明显去除效果。综合考察三种厚度面层对各污染指标的截留效果，可得到面层厚度为5 cm的透水混凝土铺装对污染物的总体去除效果较好。

Abstract: Pervious concrete pavement plays an important role in sponge city. Permeable concrete pavement test devices were set up in this study with different surface layer thicknesses. By simulating rainfall, the effects of pervious concrete pavement on the quality of infiltrating rainwater. The results are as follows: the pervious concrete pavement has a good removal effect on TP and SS, with stable removal rate above 90%; the COD increases at the beginning of rainfall, but gradually decreases next; the TN in rainwater is reduced in a certain degree when passing though the devices, but the decreasing amplitude gradually decrease with the extension of the rainfall duration, and the de-vices have no obvious effect on the removal of NH₄-N. Comprehensively considering interception effect of three kinds of surface layers thickness on each pollution index, it turns out that the per-meable concrete pavement with 5 cm surface layer has a good overall removal of pollutants.