基于足尺环道加速加载试验的沥青路面车辙预估模型校正  

Asphalt Pavement Rutting Prediction Model Correction Based on Accelerated Loading Test of Full-scale Loop

作　　者：周兴业[1,2,3] 肖倩 单伶燕[1,2,3] 王旭东 谢国瑞 ZHOU Xing-ye;XIAO Qian;SHAN Ling-yan;WANG Xu-dong;XIE Guo-rui(Research Institute of Highway Ministry of Transport,Fundamental Research Innovation Center,Beijing 100088,China;National Observation and Research Station of Road Materials Corrosion and Engineering Safety in Dadushe Beijing,Beijing 100088,China;Guangxi Key Laboratory of Intelligent Road Maintenance in Transportation Industry,Nanning 530020,Guangxi,China)

机构地区：[1]交通运输部公路科学研究院基础研究创新中心,北京100088 [2]北京大杜社公路材料腐蚀与工程安全国家野外科学观测研究站,北京100088 [3]广西交通运输行业道路智慧养护重点实验室,广西南宁530020

出　　处：《中国公路学报》2024年第12期258-268,共11页China Journal of Highway and Transport

基　　金：国家重点研发计划项目(2020YFA0714300);中央级公益性科研院所基本科研业务费项目(2024-9004,2023-9024)。

摘　　要：为改进现有车辙预估模型的精度和可靠性,基于RIOHTrack足尺环道加速加载试验,对中国现行规范中的车辙预估模型进行了校正,提出了模型修正方法,改进了模型可靠性,使其更适合所在地区的车辙预估。研究发现,中国沥青路面设计规范中的车辙模型,具有显著的结构依赖性,模型预估精度最高、误差最小的为沥青混凝土层厚12 cm的半刚性基层沥青路面结构,且其他结构的预估精度均不高。为了提高车辙预估模型的精度和可靠性,通过在既有模型中引入地方性修正系数的方法,建立了新模型。经过地方性修正之后,所有结构的车辙预估模型精度均得到了较大幅度提高:单一结构修正时,MAPE由修正前的29.04%降至7.81%,决定系数R2>0.82;按七大类结构归类进行修正时,MAPE更低,介于6.34%~7.99%之间,决定系数R2在0.87以上。由于基础数据中已经反映了不同路面结构和材料的特点,以及当地气候环境和交通荷载情况的影响,修正后模型更适合于RIOHTrack所在地区各类路面结构的车辙预测。To improve the accuracy and reliability of the existing rutting prediction model,based on the RIOHTrack full-scale loop accelerated loading test,the rutting prediction model in the current code in China was corrected,and a model correction method is proposed to improve the reliability of the model and make it more suitable for rutting estimation in the region.It is found that the rutting model in the design code of asphalt pavement in China has a significant structural dependence,and the model has the highest estimation accuracy and smallest error for the semi-rigid base asphalt pavement structure with an asphalt concrete layer thickness of 12 cm,while the estimation accuracy of other structures is not high.To improve the accuracy and reliability of the rutting prediction model,a new model was established by introducing local correction coefficients into the existing model.After local correction,the accuracy of the rutting prediction model for all structures was greatly improved:the MAPE was reduced from 29.04%to 7.81%before correction for a single structure,and the coefficient of determination R2 was greater than 0.82;the MAPE was lower(6.34%-7.99%)and the coefficient of determination R2 is above 0.87 when the correction is classified according to seven major structures.Based on the characteristics of different pavement structures and materials,as well as the influence of local climate and traffic loads,the modified model is more suitable for the rutting prediction of various pavement structures in the RIOHTrack area.

关 键 词：路面工程 足尺环道 加速加载试验 车辙预估模型 模型校正 

分 类 号：U416.221[交通运输工程—道路与铁道工程]