摘要
为分析纵坡段沥青路面车辙,进行了室内蠕变试验,按"四单元五参数"模型确定了相关参数。进行了现场温度场检测,用有限元工具模拟了沥青路面温度场,按方形均布的垂直和水平荷载,分析计算了典型结构、荷载与行车速度情况下的路面单日车辙量。比较不同速度、超载水平、纵坡坡度的计算结果发现,影响纵坡段车辙的最主要因素是车速降低导致的荷载作用时间增加,其次是超载因素,最后是水平荷载分量的影响。提出了提高纵坡段沥青路面材料的抗车辙能力,及采取合理的坡度与坡长组合的措施,保证纵坡段载重车辆的总体运行速度。
The indoor creeping experiment is carried out to analyze the rutting disease at longitudinal slope, and then the parameters are determined by ＂four-unit and five-parameter model＂. On the base of in-situ test result of temperature, the asphah pavement temperature field is simulated by finite element method, according to vertical and horizontal stress in rectangle load area;then the rutting amount per day is computed under conditions of typical structure, load and vehicle speed. Through the comparison of computing results under changing speed, overload level and longitudinal slope gradient, the increase of loading time caused by reduce of vehicle speed has the most important influence, the overload does the second, and the horizontal load has little influence. In the actual engineering, on the one hand, improving the performance of anti-rutting material is necessary;on the other hand, suitable combination of grades and distances is important to guarantee the overall vehicle speed.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2009年第6期1028-1032,共5页
Journal of Chongqing Jiaotong University(Natural Science)
基金
江西省交通厅资助项目(200700033)
关键词
纵坡
车辙
四单元五参数模型
温度场
有限元
longitudinal slope
rutting
four-unit and five-parameter model
temperature field
finite element
