
Control Effect of Different Types of Permeable Pavement Base Structure on Rainwater Runoff
Yun-jin HU, Peng YING, Hui-cai GAO
Control Effect of Different Types of Permeable Pavement Base Structure on Rainwater Runoff
In order to study the rainfall infiltration effect of different types of permeable pavement base structures, two kinds of physical models of permeable pavement are constructed in this paper. Recycled aggregate and ordinary graded gravel are used as base structure of these two different types of permeable pavement. The experiments of rainwater infiltration process of permeable pavement under three different rainfall intensities are carried out. The results show that under three different rainfall intensities, the peak time for the flow of recycled aggregate permeable pavement lags behind that of ordinary graded gravel permeable pavement, and the surface runoff generated is smaller, and the drainage time at the bottom of recycled aggregate permeable pavement is earlier than that of ordinary graded gravel permeable pavement. Therefore, recycled aggregate permeable pavement can increase the rainfall infiltration rate and reduce the surface runoff. The research results have important reference significance for the realization of rainwater resource utilization and the recycling of building demolition materials.
permeable pavement / base structure / recycled aggregate / rainfall infiltration {{custom_keyword}} /
Tab.1 Composition and material configuration of each layer of permeable pavement表1 透水铺装各层组成及材料配置 |
设施名称 | 构造 | 深度/mm | 结构材料 |
---|---|---|---|
模型一 普通级配碎石基层 透水铺装 | 面层 | 50 | 普通透水砖 |
找平层 | 20 | 粒径0.5~1 mm粗砂 | |
上基层 | 100 | 粒径8~20 mm级配碎石 | |
下基层 | 150 | 粒径25~40 mm级配碎石 | |
土基层 | 500 | 砂壤土 | |
模型二 再生骨料基层 透水铺装 | 面层 | 50 | 普通透水砖 |
找平层 | 20 | 粒径0.5~1 mm粗砂 | |
上基层 | 100 | 粒径8~20 mm再生骨料 | |
下基层 | 150 | 粒径25~40 mm再生骨料 | |
土基层 | 500 | 砂壤土 |
Tab.2 Rainfall infiltration test results of different types of permeable pavement structures表2 不同类型透水铺装结构降雨入渗试验结果 |
编号 | 降雨量/mm | 降雨历时/h | 峰现时间/min | 5 min峰值径流量/mm | 地表总径流量/mm | 排水开始时刻/min | 排水结束时间/h | 排水量/mm | 径流系数/% |
---|---|---|---|---|---|---|---|---|---|
模型一 | 50 | 1 | - | - | - | 90 | 49.3 | 19.69 | - |
模型二 | 50 | 1 | - | - | - | 60 | 38.6 | 16.78 | - |
模型一 | 80 | 1 | 65 | 0.98 | 1.10 | 60 | 73.5 | 56.83 | 1.38 |
模型二 | 80 | 1 | - | - | - | 41 | 60.5 | 49.95 | - |
模型一 | 110 | 1 | 54 | 1.35 | 2.67 | 30 | 125.6 | 64.63 | 2.43 |
模型二 | 110 | 1 | 66 | 0.9 | 1.58 | 21 | 100.3 | 56.74 | 1.44 |
Fig.2 Surface runoff every 5 minutes of different permeable pavement structure models under rainfall intensity 110 mm/h图2 110 mm/h降雨下不同透水铺装结构模型5 min地表径流量 |
Fig.4 Drainage conditions of box bottoms of different permeable pavement structure models after the start of 50 mm/h rainfall图4 50 mm/h降雨开始后不同透水铺装结构模型箱底排水状况 |
Fig.5 Drainage conditions of box bottoms of different permeable pavement structure models after the start of 80 mm/h rainfall图5 80 mm/h降雨开始后不同透水铺装结构模型箱底排水状况 |
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