关键词: 道路工程；轴载谱；车辆分类；车辆类型转换；当量轴载换算系数

Abstract: With the implement of the Specifications for Design of Highway Asphalt Pavement (2017 version), the transform between the new and old vehicle classification standards has become a problem in asphalt pavement design. All vehicle data used were collected by expressway toll management system from Henan Province, in 2015. A transform method was firstly proposed, 6 types of vehicles classified by old specification were transformed into 11 types of vehicles under the 2017 version of specification. The representative values of axle load spectrum parameters in Henan Province were then calculated. According to the axle load spectrum parameters and the requirements of the new specification, the equivalent design axle load conversion coefficient of various vehicle types in asphalt pavement design was calculated, and the representative value of equivalent design axle load conversion coefficient in Henan Province was determined. The results indicate that the proposed transform method for old and new vehicle types is feasible. However, when the vehicle overload is serious, the equivalent design axle load conversion coefficient calculated by the standard method still can not accurately reflect the actual situation.

Key words: highway engineering; axle load spectrum; vehicle classification; transform of vehicle types; equivalent axle conversion factor