以安全为导向的道路养护评价模型研究

为了完善道路养护评价体系和改善目前道路养护过程中考虑因素不足的问题,根据道路差异性将平面交叉口和路段作为2个评价对象,基于影响道路安全的5个主要影响因素采用4层次的层次分析法建立了更加客观全面的道路安全养护评价体系,并针对各项指标建立了对应的评价标准,通过Kendall′s W法验证了标准的合理性,采用综合指数法建立了道路安全养护评价模型,并通过主成分分析和权值因子判断表2种方法对模型的参数进行标定.为了验证模型的合理性和优劣性,选取上海市蕴川公路、宝安公路、S20等道路通过专家打分和现场试验对模型进行了检验,实验结果表明建立的评价模型与专家打分结果具有良好的相关性,相关系数均高于0.737,将模型与其他模型进行对比试验,通过比较相关系数 R2证明了模型具有更优的评价结果. 

A Study of Safety-oriented Evaluation Model for Road Maintenance Program

In a view of deficiencies of the present evaluation system of road safety maintenance and management,in-tersections and sections are chosen as evaluation objects according to road differences.Five major impact factors are incor-porated in a four-level analytic hierarchy method,in order to derive a more objective and comprehensive evaluation sys-tem.Evaluation criteria are established for each indicator and their rationality is verified by Kendall′s W method.An eval-uation model is thus developed based on comprehensive indices,and parameters are calibrated by principal component a-nalysis and weight factor judgment table.Field data are collected from Wenchuan road,Bao′an road,and S20 road in Shanghai.This model is further validated through field evaluations and expert scores,a correlation coefficient of 0.737 is obtained.In comparison with other models,the R2indicates that the model yields better results with higher coefficient of determination.