内蒙古西部地区高速公路轴载谱分析

Axle-Load Spectrum Analysis of Expressways in Western Inner Mongolia

为更加适应最新规范在路面结构设计中分析交通轴载对路面使用性能的影响,采用WIM(车辆动态称重技术)获取2015~2017年内蒙古西部地区高速公路22个代表性断面车辆的动态称重数据,分析了各类车各个轴型其轴载谱参数,得到内蒙古西部地区高速公路上2、3、7、9、10类5种车型所占的比例高达95%;各类车的单轴单胎的轴数系数均很大,其中6类车和10类车能达到2.00;8种车型的月分布系数存在较大的区别且同一类型车辆存在差异变化;不同车型在各条高速公路中交通量小时分布系数差异性非常大,其中8~10类大型货车主要集中在夜间行驶,晚间0:00以后交通量达到最大值;8~10类车中三联轴的超载情况比较严重,轴载谱右边的峰值所占的比例明显要比左边的峰值高。

In order to better adapt to the latest specifications,the influence of traffic axle load on pavement performance is analyzed in pavement structure design.In this paper,WIM(Vehicle Weigh-in-Motion technology)is used to obtain the dynamic weighing data of 22 representative cross-section vehicles of Expressway in western Inner Mongolia from 2015 to 2017.After analyzing the axle load spectrum parameters of each type of various types of vehicles,it was found that the proportion of 5 types of vehicles of types2,3,7,9,and 10 on the expressways in western Inner Mongolia was as high as 95%.The coefficient of the number of axles of single axle and single tire of all kinds of vehicles is very large,in which the number of axles of types 6 and 10 can reach 2.00.There are large differences in the monthly distribution coefficients of 8 types of vehicles and there are differences in the same type of vehicles.The difference in the hourly distribution coefficients of different vehicle types on various highways is very large.Among them,large trucks of types 8 to 10 are mainly concentrated at night,and the traffic volume reaches the maximum after 0:00 at night.The overload condition of the triple-axle is more serious in vehicles of types 8 to 10.The peak value on the right side of the axle load spectrum is obviously higher than the peak value on the left side.