Prediction Model for Water Film Thickness of Drainage Asphalt Pavement under Ultimate Rainfall Intensity

WANG Min; HE Zhaoyi; ZHOU Wen; SONG Gang

doi:10.3969/j.issn.0258-2724.20230159

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Journal of Southwest Jiaotong University > 2024 > Accepted Manuscript

WANG Min, HE Zhaoyi, ZHOU Wen, SONG Gang. Prediction Model for Water Film Thickness of Drainage Asphalt Pavement under Ultimate Rainfall Intensity[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230159

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WANG Min, HE Zhaoyi, ZHOU Wen, SONG Gang. Prediction Model for Water Film Thickness of Drainage Asphalt Pavement under Ultimate Rainfall Intensity[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20230159

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Prediction Model for Water Film Thickness of Drainage Asphalt Pavement under Ultimate Rainfall Intensity

doi: 10.3969/j.issn.0258-2724.20230159

WANG Min^{1, 2
,},
HE Zhaoyi^{1
,
,},
ZHOU Wen³,
SONG Gang¹

1.
School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China
2.
Wuhan Railway Vocational College of Technology, Wuhan 430205, China
3.
Guangxi Communications Investment Group Corporation Ltd., Nanning 530022, China

Received Date: 19 Apr 2023
Rev Recd Date: 01 Sep 2023

Available Online: 13 Jan 2025

Abstract

Abstract

In order to study the variation law of water film thickness of multi-lane drainage asphalt pavement under ultimate rainfall intensity, a full-scale experimental section of multi-lane drainage asphalt pavement was constructed in the laboratory based on the seepage characteristics of drainage asphalt pavement. The water film thickness of the road surface was measured under different rainfall intensities, and the variation law of water film thickness with factors such as rainfall intensity and drainage path length of the pavement was analyzed. A model for predicting the water film thickness of drainage asphalt pavement under heavy rainfall was proposed, and on-site verification of the prediction model was conducted on the Nanning Ring Expressway in Guangxi Province. The ultimate rainfall intensity for drainage asphalt pavement without water film was determined based on a water film thickness prediction model. The research results indicate that the measured water film thickness of the drainage asphalt pavement increases with the drainage path length of the pavement and rapidly increases with the increase in rainfall intensity. During moderate to light rain periods with minimal rainfall, no water film will appear within 3 m of the road center; the water film thickness increases with the increase in rainfall and drainage path length, and it decreases with the increase in pavement thickness, slope, and porosity; when the drainage path length does not exceed 2 m, drainage asphalt pavement can withstand extremely heavy rainstorm without water film. When the drainage path length exceeds 10 m, the rainfall intensity reaches the level of heavy rain, which will form a water film on the road surface.
- asphalt pavement,
- rainfall,
- traffic safety,
- water film,
- model structure

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References

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