摘要
为了研究沥青路面横向裂缝的演变规律,依托江苏省高速公路历年的检测数据,选取部分路段进行精细化跟踪观测,考虑了环境和材料等因素的影响,分析了横向裂缝密度随路龄的演变规律,建立了演变模型,进行了预测分析。结果表明,横向裂缝受低温的影响较大;与AK-13或PAC-13相比,上面层材料采用SMA-13时裂缝密度较小;横向裂缝的宏观演变规律呈现出初步发展、稳步发展、快速发展的三阶段特征,可以使用结构行为方程表征;当路面养护及时时,裂缝发展较慢,方程参数β值较小。
In order to study the evolution of transverse cracks on asphalt pavement,some sections of expressways in Jiangsu Province were chosen for detailed continuous observation based on the detection data over the past years.Considering the influence of factors such as environment and pavement materials,the evolution of transverse crack density with road age was analyzed,and a model was established to carry out the predictive analysis.The results show that the transverse cracks are greatly affected by low temperature.Compared with AK-13 and PAC-13,the crack density is smaller when SMA-13 is used as the material of surface layer.The evolution of transverse cracks presents three-stage characteristics of initial development,steady development and rapid development,which can be characterized by structural behavior equations.When the pavement is maintained in time,the cracks develop slowly and the value of the equation parameterβis small.
作者
金光来
臧国帅
JIN Guang-lai;ZANG Guo-shuai(Jiangsu Sinoroad Engineering Technology Research Institute Co.,Ltd.,Nanjing 210000,Jiangsu,China)
出处
《筑路机械与施工机械化》
2020年第1期138-142,共5页
Road Machinery & Construction Mechanization
关键词
道路工程
横向裂缝
结构行为方程
演变规律
highway engineering
transverse crack
structural behavior equation
evolution
