沥青路面预防性养护时机综合评价指标体系

为了合理确定沥青路面预防性养护措施的最佳实施时机,分析了沥青路面使用性能评价指标与预防性养护工程特点,建立了基于路面状况指数、行驶质量指数、抗滑系数及车辙的路面使用性能综合评价指标体系。考虑到不同路面所处的地理环境及所承担的荷载组合与交通量的差异,根据道路的实际状况,应用灰色关联度理论确定各分项指标的权重。某高速公路4个单项指标的权重系数计算结果分别为0.27、0.21、0.25与0.27,表明增加的车辙指标是反映沥青路面使用初期特点的控制指标,确定的分指标权重值可使预防性养护时机的选择更具针对性。

Integrative evaluation index system for preventive maintenance timing of asphalt pavement

In order to decide the best timing of preventive maintenance of asphalt pavement,the evaluation indices of service performance and the characters of preventive maintenance were analyzed,an integrative evaluation index system of the timing was set up based on integrating pavement condition index,ride quality index,anti-skid coefficient and asphalt rutting index.The differences of traffic volumes,road environments and compound loads aimed at different roads were considered,the weight coefficients of subentry indices were computed by applying grey relation theory based on the practical status of road.Computation result shows that weight coefficients are 0.27,0.21,0.25 and 0.27 respectively,rutting index is a vital controlling target to reflect the nature of young asphalt pavement,and the weight values of subentry indices enable the selection time of the preventive maintenance more pertinent and practicable.5 tabs,17 refs.