Model Construction and Verification of Water Film Thickness in the Surface Domain of Drainage Asphalt Pavement Based on Model of Dielectric Constant-porosity
The purpose of this paper is to accurately obtain the surface distribution of the water film thickness of the ultra wide cross-section drainage asphalt pavement,guide the anti-slippery evaluation and risk warning of the pavement in rainy weather,and reduce the incidence of road accidents.Based on the basic theories of seepage theory and water film thickness model,as well as the relationship model between porosity and dielectric constant,and relying on practical engineering,three-dimensional ground penetrating radar is used to collect the dielectric constant of the surface area,convert it into a distribution map of porosity in the surface area,and then construct a calculation model for water film thickness in the surface area.Finally,the accuracy of the model was verified through measured data under different rainfall intensities.The results show that the model has good accuracy.By detecting the distribution of surface void fraction in advance and collecting indicators such as drainage path length,road surface composite slope,and thickness,real-time distribution of surface water film thickness can be predicted by monitoring rainfall.This provides accurate and timely basic data for road safety management in rainy days.
drainage asphalt pavementdielectric constantsurface water film thickness model
万方数据
维普
