旧水泥混凝土路面沥青铺装层反射裂缝疲劳断裂分析  

Fatigue Fracture Analysis of Reflection Cracks in Asphalt Pavement Layer of Old Cement Concrete Pavement

作　　者：元松 YUAN Song(Shanghai Municipal Highway Engineering Testing Co.,Ltd.,Shanghai 201108)

机构地区：[1]上海市市政公路工程检测有限公司,上海201108

出　　处：《公路交通技术》2024年第1期40-47,共8页Technology of Highway and Transport

基　　金：上海市2021年度“科技创新行动计划”社会发展领域项目(21DZ1203305)。

摘　　要：针对旧水泥混凝土路面沥青铺装层容易产生反射裂缝的特点,采用断裂力学理论,建立了5层体系平面应变模型,对各种荷载作用下不同层间结合状态和路面结构参数的应力强度因子进行了计算分析,并对常用防止反射裂缝措施进行了效果比较。结果表明:层间粘结状态对裂缝扩展的影响较大,土工格栅的防止反射裂缝效果相对较好。In response to the characteristics of reflective cracks in the asphalt pavement layer of old cement concrete pavement,a five layer system plane strain model was established using fracture mechanics theory.The stress intensity factors of different interlayer bonding states and pavement structural parameters under various loads were calculated and analyzed,and the effectiveness of commonly used measures to prevent reflection cracks was compared.The results indicate that the interlayer bonding state has a significant impact on crack propagation.The geogrid has a relatively good effect in preventing reflection cracks.

关 键 词：旧水泥混凝土路面 沥青铺装层 应力强度因子 层间接触状态 防止反射裂缝措施 

分 类 号：U416.216[交通运输工程—道路与铁道工程]