Study on water distribution characteristics of surface gathered water and water film thickness model

The characteristics of surface gathered water conditions during rainfall were analyzed based on geometric parameters and hydraulics theory of road surface, and water film thickness model of surface gathered water was established by stages to obtain a series of theoretical numerical solutions for the spatial distribution of water film thickness on the road surface. To verify the theoretical water film thickness equation, variables were controlled to simulate multiple sets of data and compared with other calculation results of the water film thickness to analyze the correctness and application value of that equation. 3D simulation of pavement water accumulation was performed.