透水沥青路面对洁净水体和地表径流水质的影响

发布时间：2018-07-18 16:53

【摘要】：透水沥青路面(permeable asphalt parement,PAP)具有减少地表径流,改善雨天行车安全等诸多优点,得到越来越多研究人员的关注。地表径流含有大量污染物,这些污染水体流经透水沥青路面后渗入土基,最终进入地下水中,因此渗入土基的水体质量需要检测。选取16项水质评价指标,利用透水沥青路面渗透装置进行试验,得了由6.3cm多孔沥青混合料、30cm级配碎石、15cm砂垫层组成的透水沥青路面对洁净水体和地表径流污染水水质的影响,并相应地提出了路侧排水设施的设计思路。研究结果表明:自来水经透水沥青路面渗流后,初期渗流水样的各项污染指标均增大;渗流60min后,除石油类污染物,渗流水样的各项污染物含量均小于入渗水体;地表径流经透水沥青路面渗流后,其中重金属的去除效果最好,石油类、动植物油类、BOD(生物需氧量)、COD(化学需氧量)、氨氮、总磷等营养盐的去除效果次之,而氯化物、总氮等无机阴离子和营养盐的去除效果不佳;随着水样采集时间的延长,水体中污染物含量都有不同程度的降低。
[Abstract]:Permeable asphalt parement (PAP) has many advantages, such as reducing surface runoff and improving the driving safety of rainy days. It has been paid more and more attention by more and more researchers. The surface runoff contains a large number of pollutants. These polluted waters flow through the permeable asphalt pavement and infiltrate into the soil base, and finally enter the groundwater, so it infiltrate into the soil based water body. The quality needs testing. 16 water quality evaluation indexes are selected and the permeable asphalt pavement permeable device is used to test the water quality of the permeable asphalt pavement composed of 6.3cm porous asphalt mixture, 30cm Graded Macadam and 15cm sand cushion, and the design thought of the roadside drainage facilities is put forward accordingly. The results show that all the pollution indexes of the initial seepage water increase after the percolation of water through the permeable asphalt pavement, and after the seepage of 60min, all the pollutants in the seepage water are less than the infiltration water, and the removal efficiency of the heavy metals is the best after the seepage flow through the permeable asphalt pavement. The removal of nutrients such as BOD (bio oxygen demand), COD (chemical oxygen demand), ammonia nitrogen, total phosphorus, and other inorganic anions and nutrients, such as chloride and total nitrogen are not good. With the time of collecting water, the contents of pollutants in water are reduced in varying degrees.
【作者单位】：长安大学特殊地区公路工程教育部重点实验室;长安大学建筑工程学院;长安大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51208049) 交通运输部建设科技项目(2013318221150) 陕西省青年科技新星项目(2015KJXX-23)
【分类号】：U416.217

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