长大纵坡沥青路面车辙发展规律与轴载换算修正系数研究  

Rut Development Law and Correction Factor of Axle Load Conversion of Asphalt Pavement in Long and Large Longitudinal Slope

作　　者：郭晨晨 丁婷婷 吕鑫 孙建秀 张吉哲 姚占勇 GUO Chenchen;DING Tingting;LYU Xin;SUN Jianxiu;ZHANG Jizhe;YAO Zhanyong(School of Qilu Transportation,Shandong University,Jinan,Shandong 250002,China;Shandong Provincial Communications Planning and Design Institute Group Co.,Ltd.,Jinan,Shandong 250031,China)

机构地区：[1]山东大学齐鲁交通学院,山东济南250002 [2]山东省交通规划设计院集团有限公司,山东济南250031

出　　处：《中外公路》2024年第1期30-39,共10页Journal of China & Foreign Highway

基　　金：国家自然科学基金青年基金资助项目(编号:51908331);山东省自然科学基金资助项目(编号:ZR2019BEE004);山东省交通科技计划项目(编号:2020B66)。

摘　　要：现有设计规范未对长大纵坡路面做出特殊设计规定,直接套用设计规范忽略了其受力特点,不能较好地保证路面使用性能及寿命。为实现特殊路段路面结构差异化设计,该文基于实测沥青混合料动态模量、全年交通量及温度数据,利用自主开发的温度-轴载分析软件,将真实交通量转换为标准轴载。采用Abaqus软件,建立实测轴载与温度耦合作用下的车辙模型,分析长大纵坡对车辙发展规律的影响。研究表明:坡度增大导致速度降低,容易引发长大纵坡路段沥青路面车辙病害的发生。基于车辙等效原理,提出不同坡度及坡长下的轴载换算修正系数,为长大纵坡路段沥青路面的差异化设计提供理论依据。The existing design specifications do not make special design provisions for pavements in long and large longitudinal slopes,and the directly applied design specifications ignore the stress characteristics of these pavements,which fail to guarantee pavement performance and life.In order to realize the differential design of the pavement structure of special road sections,based on the measured dynamic modulus of asphalt mixture,annual traffic volume,and temperature data,this paper used the self-developed temperature-axle load analysis software to convert the real traffic volume into standard axle load.Abaqus software was used to establish a rut model under the coupling effect of measured axle load and temperature,and the influence of long and large longitudinal slopes on rut development law was analyzed.The results show that the increase in slope leads to a decrease in speed,which easily causes rut disease of asphalt pavements in long and large longitudinal slopes.Based on the rut equivalence principle,the correction factor of axle load conversion under different slopes and slope lengths is proposed,which provides a theoretical basis for the differential design of asphalt pavements in long and large longitudinal slopes.

关 键 词：路面结构设计 轴载换算修正 车辙等效 长大纵坡 修正系数 

分 类 号：U416.2[交通运输工程—道路与铁道工程]