摘要
为了更加准确快捷地预测透水铺装内部的雨水渗流过程,探究降雨参数与路面设计参数对其渗流性能的影响,提出透水铺装雨水入渗模型,并针对影响因素的相关性进行研究。首先,基于地区水文气象资料与路面材料渗透特性,利用数学模型对降雨阶段关键参数进行量化研究,并从降雨强度与材料渗透能力的角度对雨水入渗的物理过程进行分阶段刻画,最终建立透水铺装雨水入渗-储水-排空模型。其次,针对该模型的诸多输入参数,进行正交设计试验计算各参数与径流控制率的相关性,寻找关键控制指标;基于该结论拟定典型透水铺装结构组合,选择不同降雨重现期、降雨历时与时程雨型等模拟工况对水位高度、蓄水能力等进行验算与评价。结果表明:所建模型与文献数据具有较好的吻合性,NSE指数可达0.45以上;路基土的渗透系数与路面径流控制率显著相关,暴雨工况下随着路基土渗透系数的降低,地表径流占比达到30%以上,并且几乎丧失连续储水能力,而路基土饱和渗透系数的影响性较小;溢流管可有效减少地表径流量,降低溢流风险,在极端暴雨条件下设置溢流管的道路可削减60%的地表径流,并具有50%以上的连续储水能力;时程雨型对路面渗流特性的影响较为复杂,雨峰出现时间在控制地表径流与延缓径流峰值两方面呈现相反的规律,因而需要根据当地降雨资料与设计要求进行权衡。
To predict the hydrological behavior of rainwater on permeable pavement more accurately and quickly,and to investigate the influence of rainfall and pavement design parameters on hydrological performance,this paper proposed a rainfall infiltration model and studied the correlation between influencing factors.Firstly,based on the regional meteorological data and permeability characteristics of pavement materials,the key parameters of the rainfall phase were quantified by mathematical model and the physical process of rainfall infiltration was divided according to rainfall intensity and material permeability.Next,an infiltration-water-storage-emptying model for permeable pavements was developed and was verified by NSE index with the literature data.Then,an orthogonal test was carried out to perform correlation analysis of the different input parameters of the model and obtain key control indicators.According to these findings,the infiltrating performance of typical permeable pavement types was evaluated under different rainfall simulation scenarios described by recurrence periods,duration,and rainfall pattern.The results show that the model has good agreement with the literature data with an NSE index above 0.45,and can estimate and evaluate the permeating and water storage properties of the permeable pavement according to meteorological data in different regions.The permeability of subgrade soil is significantly influenced by the runoff control ratio.Under rainstorm conditions,the ratio of surface runoff to precipitation reached more than 30%and almost lost the continuous water-storage capacity when the permeability coefficient of soil decreased.However,the saturated permeability of the saturated and initial permeability of subgrade soil is less significant in the simulation.The overflow pipe can effectively control runoff and reduce the risk of overflow.The permeable pavement with overflow pipe can reduce 60%of surface runoff under extreme rainstorm conditions,and has more than 50%continuous water-storage capacit
作者
李辉
李昊臻
王雪峰
张胜
张萌瑶
张恒基
LI Hui;LI Hao-zhen;WANG Xue-feng;ZHANG Sheng;ZHANG Meng-yao;ZHANG Heng-ji(Department of Road and Airfield Engineering,Tongji University,Shanghai 201804,China;Hebei Qugang Highway Development Co.,Ltd.,Baoding 070399,Hebei,China)
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2019年第4期148-157,共10页
China Journal of Highway and Transport
基金
科技部国家重点研发计划项目中美政府间合作项目(2016YFE0108200)
河北省交通运输厅科技项目(QG2018-5)
关键词
道路工程
雨水入渗模型
数值模拟
透水铺装
降雨特性
溢流管
road engineering
rainfall infiltration model
numerical simulation
permeable pavement
rainfall characteristics
overflow pipe
