不同类型透水砖对雨水径流水量的控制效果

透水铺装是目前海绵城市建设中应用较广泛的技术措施之一，对雨水径流的促渗减排发挥着重要作用。选择2种不同类型透水砖为研究对象，采用人工模拟降雨实验方法，研究了降雨重现期分别为1、3、5、10 a条件下，2种不同类型透水砖对雨水径流总量控制、峰值削减和峰值延迟等方面的控制效果。结果表明：在降雨重现期小于10 a的条件下，构造透水砖和普通透水砖的场次降雨总量控制率平均值均超过95%；峰值流量均随着重现期的增加而增大，构造透水砖的峰值削减效果优于普通透水砖，平均峰值削减率提高了8.6%；构造透水砖和普通透水砖的出流延迟时间平均值分别为11.3 min和13.8 min，平均峰值延迟时间分别为6.3 min和16.3 min。构造透水砖对径流总量、峰值流量的控制效果要优于普通透水砖，因此，在透水铺装应用中，应结合项目设计目标和当地的水文地质条件，宜优先考虑采用构造透水砖铺装方式。

Effect of different types of permeable brick on the stormwater runoff quantity control

Permeable pavement is one of the most widely used technologies in the construction of sponge cities, and plays an important role in promoting the penetration and reducing stormwater runoff. In this study, two different types of permeable bricks were selected as the research objects, and the artificial rainfall simulation method was used to investigate the stormwater runoff control effects of two different types of permeable bricks under different return periods of 1, 3, 5 and 10 years, including the quantity control, the peak reduction, the peak delay and so on. The results showed that the average control rates of event rainfall quantity for the structural permeable brick and ordinary permeable brick were all over 95% at the rainfall return period less than 10 years, respectively. The peak flow increased with the increase of the return period. The peak reduction effect of the structural permeable brick was better than that of the ordinary permeable brick, and the average peak reduction rate increased by 8.6%. The average outflow delay times of the structural permeable brick and ordinary permeable brick were 11.3 min and 13.8 min, and the average peak delay times were 6.3 min and 16.3 min, respectively. The control effects of the total quantity and peak flow for the structural permeable brick were better than those of the ordinary permeable brick. Therefore, the application of permeable pavement should combine the project design goals, local hydrological and geological conditions, and the structural permeable brick should be in priority.