高速公路典型重载交通轴载谱参数与设计轴载分析

Analysis of Traffic Axle Load Spectrum and Design Axle Load for Typical Heavy Load of Expressway

交通荷载是路面结构分析和设计的重要参数之一,也是最难准确预测的参数。采用轴载谱作为路面设计荷载参数,可以有效避免当量轴载换算带来的误差。文中基于高速公路主线收费站与动态称重系统实测数据,分析了货车车道分布系数、月调节系数、小时调节系数,通过轴载分布系数确定了不同轴型的轴重分布,根据不同轴型轴重累计轴载分布,提出了典型轴载交通设计轴载,并采用永久沥青混凝土路面设计理论分析,提出以单轴双轮160kN作为山东省重载交通设计代表轴载,以双联轴380kN作为验算荷载。

The traffic load is one of the important parameters in the analysis and design of pavement structure,which is also one of most difficult indexes to accurately predict.Taking axle load spectrum as pavement design parameter can effectively avoid the error brought by the equivalent axle load conversion.In this paper based on the main line toll station and weight-in-motion measured data,analysis of the truck carriageway distribution coefficient,monthly adjustment coefficient,and hourly adjustment coefficient are made,the axle load distribution of different axle type is determined according to axle load distribution factor,and based on cumulative load distribution of different axle type and load,the typical design axle load is proposed,and according to the theory of permanent bituminous pavement,it is put forward that the single axis with double wheels 160 kN as heavy traffic design load in Shandong Province and the dual axis380 kN as verification load.