摘要
为了研究多孔沥青路面渗水性能的衰变规律,基于多孔沥青路面实际的粉尘累积过程与粒径分布,在开发的多孔沥青混合料渗水性能测试仪上进行了粉尘堵塞模拟试验,获得了不同空隙率多孔沥青混合料渗水系数衰变规律;根据路面粉尘分布与流动规律以及空隙结构衰变规律,建立了多孔沥青路面渗水系数衰变预测模型。研究结果表明:多孔沥青混合料渗水系数残留率与堵塞颗粒的质量成线性关系,渗水系数衰变速率与初始空隙率成正比;在实际使用过程中,多孔沥青路面渗水系数的衰变与过滤系数、颗粒累积速率、使用时间以及与路中线距离有关,其中轮迹带及外侧车道渗水系数衰变较快。
In order to analyze the permeability performance decay law of porous asphalt pavement, a dust clogging test was conducted on an instrument which was developed to analyze the permeability of porous asphalt mixtures based on the actual accumulation process and particle size distribution of dust in the porous asphalt pavement. The decay laws of permeability coefficient of porous asphalt mixtures with different porosities were obtained from the test. According to the dust distribution and its flow law, and voids structure decay law, the permeability decay prediction model of porous asphalt pavement was established. The results show that the residual rate of permeability coefficient has a linear relationship with the quality of blocking particles. The decay rate of permeability coefficient is proportional to the initial porosity. For the actual porous asphalt pavement, the decay law of permeability coefficient is related to the filtration coefficient, dust accumulation rate, service time and the distance from the road centerline. Especially, the drainage performance reduces rapidly in wheel track and outside lane. 1 tab, 7 figs, 25 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第1期21-27,共7页
Journal of Chang’an University(Natural Science Edition)
基金
交通运输部科技项目(2011318221430)
国家自然科学基金项目(51378121)
关键词
道路工程
多孔沥青路面
渗水系数
粉尘堵塞
预测模型
road engineering
porous asphalt pavement
permeability coefficient~ dust clogging~ prediction model
