基于冷再生基层疲劳等效的沥青路面轴载换算方法研究  

Study on Conversion Method of Axle Load for Asphalt Pavement Based on the Fatigue Equivalent of Cold Regenerative Base

作　　者：李安[1,2] 彭芳文 郑南翔[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064 [2]中冶赛迪工程技术股份有限公司,重庆400042 [3]武汉中咨路桥设计研究院有限公司,武汉430023

出　　处：《武汉理工大学学报》2012年第9期47-51,共5页Journal of Wuhan University of Technology

基　　金：交通部西部交通建设科技项目(2009-318-000-032)

摘　　要：为了优化冷再生沥青路面的结构设计,基于冷再生材料的疲劳实验结果,分析了车辆轴重与轮胎接地压强的关系,通过有限元方法研究了各级轴载作用下冷再生沥青路面基层层底拉应力的变化规律,按照疲劳等效原理得到基于冷再生基层疲劳等效的沥青路面轴载换算指数为4.64。考虑到安全因素,在实际应用中建议取轴载换算指数为5.0。通过冷再生基层与半刚性基层路面的轴载敏感性对比分析可知,利用冷再生技术对半刚性基层进行结构转换,可极大地改善路面的轴载敏感性,更好地保证路面使用寿命和行驶质量。In order to optimize the structural design of cold regenerative asphalt pavement,based on the fatigue experimental results of cold regenerative materials,this paper analyzed the relationship between the vehicle axle load and contact pressure of tire.It studied the variation of cold regenerative asphalt pavement tensile stress at the bottom of the grass-roots layer under the effect of axle load at all levels with finite element analysis,calculated the axle load conversion index was 4.64 through the fatigue equivalent principle.Taking into account safety factors,it suggests the axle load conversion index on 5.0 in practical applications.It showed that cold regenerative technology for structure conversion of semi-rigid base,can greatly improve the road axle load sensitivity as well as improve the life and quality of the road.

关 键 词：道路工程 沥青路面 冷再生 轴载换算 疲劳等效 

分 类 号：U414[交通运输工程—道路与铁道工程]