A Study of Subsurface Outflow of Permeable Friction Course Pavement Based on Finite Element Analysis
1 year ago
Authors:
Huỳnh Thị Mỹ Dung,Huỳnh Văn Hiệp
Publication date:
13 / 08 / 2022
Name of Publishers:
Abstract:
Permeable friction course pavement is designed with high porosity so that water can infiltrate into its pores and drain out laterally through the side. This study observes the subsurface outflow of a permeable friction course pavement via finite element analysis program SV Flux 2D. A series of analysis was conducted for the permeable friction course pavement with different slope and rainfall intensity values. The results showed that different slope values provided different results for the subsurface outflow. As the slope increased, the subsurface outflow of the permeable friction course pavement increased. It is noticed that the effect of slope on the subsurface outflow decreased when the slope increased from 6% to 8%. In addition, this study also found that as the time of rain event increased, the subsurface outflow pavement was reduced. The investigation of effect of rainfall intensity on the subsurface outflow of the permeable friction course pavement showed that as the rainfall intensity increased, the subsurface outflow steadily increased. However, it is noted that at the higher rainfall intensity, the pavement became saturated faster and the overflow happened earlier. In future, further studies focused on the drainage of permeable friction course pavement including subsurface and surface outflow should be carried out.