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分析了采用轮迹横向分布系数容易导致轴载作用次数计算结果偏大的原因,通过引入通行覆盖率,按轮迹服从正态分布,探讨了通行覆盖率计算方法。提出了柔性路面与刚性路面轮胎有效宽度确定方法,分析了轴载作用下的路面应力应变峰值对通行覆盖率的影响,并以卡车J6、德龙3000作用于刚性路面为例,采用通行覆盖率计算方法进行了路面单一交通量及混合交通量分析。研究结果表明:对于轴载作用次数计算,在轴载作用次数的峰值位置,现行规范的计算结果是准确的,但对其他位置,随着与峰值位置的距离增大,轴载作用次数迅速减小;单一交通量作用下,J6单轴双轮轴载在距峰值位置0.8 m处,轴载作用次数减小了50%,因此,采用通行覆盖率计算方法比现行方法更为准确。
This paper analyzes the reason that the calculation result of axle loading is easy to cause by using the lateral distribution coefficient of wheel tracks. By introducing the traffic coverage and following the normal distribution of wheel tracks, the calculation method of traffic coverage is discussed. The method to determine the effective width of the flexible road surface and the rigid road surface tire is proposed. The influence of peak stress and strain peak of the road surface on the coverage rate is analyzed. Taking the truck J6 and the Delong 3000 acting on the rigid road surface as an example, Calculation Method Pavement single traffic and mixed traffic analysis. The results show that for the calculation of the number of times of axial loading, the calculation result of current code is accurate at the peak position of the number of times of axial loading, but for the other positions, the number of axial loading decreases rapidly as the distance from the peak position increases Under the single traffic load, the J6 single-axle double-axle is carried at a distance of 0.8 m from the peak position, and the number of times of axle loading is reduced by 50%. Therefore, the calculation method of traffic coverage is more accurate than the current method.