摘要
依托昆楚高速公路扩建工程项目,通过有限元软件建立了高速公路沥青路面数值模型;分析了环境温度、行车速度和行车荷载对沥青路面变形的影响;通过灰色关联法对连续温度变化下沥青路面变形影响因素的显著水平进行了评价,对沥青路面永久变形进行了预估。结果表明:增大荷载应力,对车辙深度和路基下凹量影响更为显著,车辆行驶速度的提高对路面凸起变形改善效果更为明显;在高速公路实际运营过程中,应注意对重载车辆的管控和最低车辆行驶速度的限制;对沥青路面变形影响程度由大到小排序为环境温度、车辆荷载和行车速度;根据车辙深度预测结果,在通车6~7年后车辙深度达到许可值,15年后车辙深度达到25mm。
Relying on the expansion project of Kunming-Chuxiong Expressway, the numerical model of asphalt pavement of expressway is established through finite element software;the influence of ambient temperature, driving speed and driving load on asphalt pavement deformation is analyzed;the significant level of influencing factors of asphalt pavement deformation under continuous temperature change is evaluated by gray correlation method, and the permanent deformation of asphalt pavement is predicted. The results show that increasing the load stress has a more significant effect on the rutting depth and subgrade sag, and the improvement of vehicle driving speed has a more significant effect on the pavement bulge deformation;during the actual operation of expressway, attention should be paid to the control of heavy vehicles and the limit of the minimum vehicle driving speed;the order of influence on asphalt pavement deformation is ambient temperature, vehicle load and driving speed;according to the prediction results of rutting depth, the rutting depth will reach the allowable value 6~7 years after opening to traffic, and 25 mm 15 years later.
作者
赵春生
ZHAO Chunsheng(China Railway 16th Bureau Group Road and Bridge Engineering Co.Ltd.,Beijing 101500,China)
出处
《铁道建筑技术》
2023年第1期191-195,共5页
Railway Construction Technology
基金
中铁十六局集团有限公司科技研发计划项目(K2018-28C)。
关键词
高速公路
沥青路面
变形
温度场
连续变温
有限元法
expressway
asphalt pavement
deformation
temperature field
continuous temperature change
finite element method
