市政技术2026，Vol.44Issue(9)：89-105,17.DOI:10.19922/j.1009-7767.2026.09.089
基于MEPDG的橡胶沥青长寿命路面结构设计
Long-life Pavement Structure Design of Rubberized Asphalt Based on MEPDG
摘要
Abstract
Combining pavement structure,material properties and service environment,this paper proposes an inte-grated material-structure design method for long-life rubberized asphalt pavement based on the MEPDG fatigue model.The MEPDG fatigue model is calibrated with fatigue test data of rubberized asphalt mixtures.The results show that the correlation coefficient reaches 0.82 for AC-13,AC-20 gradations and the generic gradation model after calibration using fatigue test data.Twenty-two long-life rubberized asphalt pavement structures are analyzed using the calibrated MEPDG fatigue model.Considering the climatic features of Hebei Province,i.e.,cold and dry winters,hot and rainy summers,concentrated precipitation and prominent seasonal temperature-humidity variations,as well as local traffic conditions,the recommended semi-rigid base rubberized asphalt pavement structure is as follows:4 cm rubberized asphalt concrete surface course+8 cm rubberized asphalt concrete intermediate course+12 cm rubber-ized asphalt concrete lower course+(18+18+18)cm or(20+20+20)cm cement-stabilized macadam base.The op-timal crumb rubber content for each rubberized asphalt concrete layer is 50％.For the full-depth rubberized asphalt pavement,the recommended structure is 4 cm rubberized asphalt concrete surface course+10 cm rubberized asphalt concrete intermediate course+11 cm rubberized asphalt concrete lower course+11 cm rubberized asphalt concrete base+18 cm graded crushed stone subbase.The optimal crumb rubber content for each rubberized asphalt concrete layer is 40％.Five structural design indices,namely permanent deformation of rubberized asphalt layers,flexural-tensile strain at the bottom of rubberized asphalt mixture layers,maximum tensile stress at the bottom of semi-rigid base,vertical compressive strain on subgrade top surface,and structural rutting,are adopted to check the two pro-posed structures.The critical strains are back-calculated by the calibrated fatigue model to verify the fatigue life of rubberized asphalt mixtures,and all indices meet the specification requirements.The research outcomes can provide reliable theoretical support for the design of long-life rubberized asphalt pavements.关键词
疲劳模型/MEPDG/橡胶沥青路面/长寿命路面/路面结构设计指标/模型验证Key words
fatigue model/MEPDG/rubberized asphalt pavement/long-life pavement/pavement structural design index/model verification分类
交通工程引用本文复制引用
喻光勇,刘智慧,于华洋,樊凯德..基于MEPDG的橡胶沥青长寿命路面结构设计[J].市政技术,2026,44(9):89-105,17.基金项目
国家自然科学基金项目(52178426) （52178426）
