[1] Chen Xiaobing, Wang Juntian, Liu Han, Xu Libin, et al. Influence of rainfall on skid resistance performanceand driving safety conditions of asphalt pavements [J]. Journal of Southeast University (English Edition), 2019, 35 (4): 482-490. [doi:10.3969/j.issn.1003-7985.2019.04.011]
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Influence of rainfall on skid resistance performanceand driving safety conditions of asphalt pavements(
)
降雨对沥青路面抗滑性能和行车安全的影响
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 35
- Issue:
- 2019 4
- Page:
- 482-490
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2019-12-30
Info
- Title:
- Influence of rainfall on skid resistance performanceand driving safety conditions of asphalt pavements
- 降雨对沥青路面抗滑性能和行车安全的影响
- Author(s):
- Chen Xiaobing; Wang Juntian; Liu Han; Xu Libin; Zhao Ronglong
- School of Transportation, Southeast University, Nanjing 210096, China
- Keywords:
- rainfall intensity; pavement transverse and longitudinal slopes; skid resistance; driving safety; water film thickness(WFT); British pendulum number(BPN); stopping sight distance(SSD)
- PACS:
- U416.217
- DOI:
- 10.3969/j.issn.1003-7985.2019.04.011
- Abstract:
- To study the influence of rainfall on pavement skid-resistance performance and driving safety, the water film thickness(WFT)concept considering the longitudinal and transverse slopes of the pavement was utilized based on the total discharge formulation and turbulence theory of slope flow. Using experimental data measured using the British pendulum test under varying WFT levels, a model for calculating the skid resistance, namely the British pendulum number(BPN), was formulated and used to quantitatively evaluate the effects of rainfall intensity, transverse, and longitudinal slopes on the computed BPN. The study results reveal that skid resistance is linearly proportional to the pavement transverse slope and inversely proportional to the rainfall intensity and the pavement longitudinal slope. In particular, rainfall intensity, along with pavement texture depth, exhibited a significant impact on the tire-pavement friction and skid-resistance performance. The results further indicate that driving safety under wet weather is predominantly governed by skid resistance and visibility. The BPN and sideway force coefficient(SFC60)values for new asphalt pavements under different rainfall intensities are provided along with some modification to the stopping sight distance(SSD)criteria. Safe driving speed limits are also determined using a safe-driving model to develop the appropriate speed limit strategies. The overall study results provide some insights, methodology approach, and reference data for the evaluation of pavement skid-resistance performance and driving safety conditions under different pavement slopes and rainfall intensities.
- 为了研究降雨对沥青路面抗滑性能和行车安全的影响, 基于坡面水流总流公式和紊流理论, 提出考虑路面纵横坡度的路面水膜厚度(WFT)概念, 根据实测的抗滑性能指标路面摆值(BPN)随水膜厚度的变化数据, 建立抗滑性能指标计算模型, 进而定量评价降雨强度和纵横坡度对BPN的影响. 研究表明:抗滑性能与横坡坡度成正比, 与降雨强度和纵坡坡度成反比, 其中降雨强度和路面构造深度对抗滑性能影响显著. 雨天行车安全主要取决于抗滑性能和能见度, 根据不同降雨强度对新建沥青路面提出BPN和横向力系数SFC60的检测要求, 对雨天公路停车视距进行修正, 并基于安全行驶模型确定雨天安全行驶速度, 以制定合适的限速策略. 研究成果可为不同降雨强度和纵坡坡度下路面抗滑性能评价、行车安全保障提供参考依据.
References:
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Memo
- Memo:
-
Biography: Chen Xiaobing(1973—), male, doctor, associate professor, xbchen@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51478114).
Citation: Chen Xiaobing, Wang Juntian, Liu Han, et al. Influence of rainfall on skid resistance performance and driving safety conditions of asphalt pavements[J].Journal of Southeast University(English Edition), 2019, 35(4):482-490.DOI:10.3969/j.issn.1003-7985.2019.04.011.