考虑环境因素的沥青路面疲劳开裂预估模型  

Prediction Model for Fatigue Crack of Asphalt Pavement with Environmental Factors Considered

作　　者：周亮[1] 凌建明[2] 林小平[3] 

机构地区：[1]交通运输部规划研究院,北京100028 [2]同济大学道路与交通工程教育部重点实验室,上海201804 [3]交通运输部科技司,北京100736

出　　处：《中国公路学报》2013年第6期47-52,共6页China Journal of Highway and Transport

基　　金：交通运输部西部交通建设科技项目(2008 318 000 99)

摘　　要：为了延长沥青路面使用寿命，针对不同荷载环境与自然环境作用下的沥青路面疲劳开裂病害，依据疲劳开裂准则，得到了沥青路面结构层状况参数及荷载一轴型参数等预估变量，构建了考虑环境因素的沥青路面疲劳开裂预估模型。推荐采用“超限疲劳寿命折减率”作为沥青路面结构疲劳寿命折减评价指标，提出了沥青路面疲劳寿命折减评价步骤。结合上海地区7条道路，对不同荷载作用下路面结构疲劳寿命进行了计算。结果表明：当车辆荷载超限25％时，各条道路疲劳寿命折减了45％～50％；当荷载超限100％时，疲劳寿命折减了85％～88％。In order to improve the service life of asphalt pavement, aimed at fatigue cracking of asphalt pavement which was subjected to heavy traffic and various environmental factors, based on the fatigue cracking principle of asphalt pavement, the pavement structure condition parameters and the axle load-configuration parameters were developed, and the fatigue life prediction model was established with environmental factors considered. The reduction ratio of fatigue life under overweight load was suggested as the index to evaluate the reduction of fatigue life. Based on data of seven roads collected in Shanghai, the fatigue lives of every pavement under different axle loads were computed. The results indicate that the reduction of fatigue life is in an extent of 450% - 50% under 25% overweight load condition, and in an extent of 85% - 88% under 100 % overweight load condition.

关 键 词：道路工程 沥青路面 实证分析 疲劳开裂 环境因素 预估模型 

分 类 号：U416.217[交通运输工程—道路与铁道工程]