基于路面使用性能评价的车辙指标研究

文章基于现有沥青路面使用性能评价规范和标准,运用简化的车辙积水模型,围绕高速公路沥青路面车辙深度主观评价标准,针对现有车辙评价模型的不足,通过采用Sigmoid函数,主要探索了车辙深度指数RDI评价模型。结果表明:结合求解的车辙内不致积水的临界车辙深度,将路面车辙深度等级划分为更精细的"轻、中、重"三个等级更加合理;优化的沥青路面车辙深度指数RDI评价模型弥补了现有车辙评价指标的不合理性;在保留现有车辙深度指数评价模型的同时,通过分析路面车辙槽的几何特征增加了车辙的其他指标,初步构建了车辙综合评价模型,对全面评价车辙的危害性及进行路面车辙的养护管理更具有实际意义。

Study on the rutting index based on the pavement performance evaluation

The article mainly explored the rut depth index assessment model of RDI by using the sigmoid function and the simplified model of rutting water,and according to the rutting depth of asphalt pavement of expressway subjective evaluation criteria,according to the deficiency of existing rutting evaluation model,and based on the existing asphalt pavement performance evaluation norms and standards.The results show：the pavement rutting depth level divided into three grades of“light, middle,heavy”is more reasonable combined with the result of the critical depth no water in rut;the optimization of the asphalt pavement rutting depth index RDI evaluation model made up the irrationality of existing rutting evaluation index;construction the comprehensive evaluation model of rutting preliminarily by analyzing the geometric characteristics of the pavement rut,and increase other indicators of the rut while leaving the existing rutting depth index evaluation model.It is of practical significance to evaluate rutting harmfulness and pavement rutting maintenance management.