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为了深入研究路面养护中抗滑界限与公路设计中制动距离限值间的关系,提出了考虑路面摩擦特性时确定制动距离的方法.基于理论流体动力学和基本力学原理,考虑轮胎类型、水膜厚度、路表特性、行车速度等因素,建立了稳态滚动轮胎的有限元模型;运用该模型计算了不同运行条件下的制动距离;通过比较分别满足养护和设计界限的制动距离,确定了路表允许的水膜厚度.研究结果表明:行车速度、水膜厚度等运行条件对路面抗滑性能有显著影响,进而影响车辆的制动距离.因此,在路面抗滑养护中应确保安全的运行条件,以与公路设计中制动距离的要求相一致.
In order to further study the relationship between the anti-skidding limit of pavement maintenance and the braking distance limit in highway design, a method to determine the braking distance considering the frictional characteristics of the pavement is proposed.Based on theoretical fluid dynamics and basic mechanics, Water film thickness, road surface characteristics, driving speed and other factors, established a steady-state rolling tire finite element model; using this model to calculate the braking distance under different operating conditions; by comparing the conservation and design limits respectively, braking distance , The water film thickness allowed by the road table was determined.The results show that: running speed, water film thickness and other operating conditions have a significant impact on the anti-sliding performance of the pavement, thereby affecting the braking distance of the vehicle.Therefore, Ensure safe operating conditions that are consistent with the braking distance requirements in highway design.