基于改进EW-AHP的沥青路面预防性养护评价模型

发布时间：2018-04-24 12:57

本文选题：道路工程 + 预防性养护　；参考：《公路交通科技》2017年09期

【摘要】：通过某公路稀浆封层路段的室内试验,发现采用稀浆封层养护的路面的针入度和延度均提高,可知稀浆封层技术可以有效减缓沥青路面低温病害的发生,预防性养护措施对沥青性能有一定的改善效果。参照国内外有关公路沥青路面预防性养护的评价方法,并结合国内技术规范中路面及材料性能评价指标,在传统评价体系的基础上提出增加沥青性能指标,从路用性能和沥青性能两方面对沥青路面预养护进行评价。考虑到评价指标权重分配方法的不足,通过对传统熵权-层次分析法进行改进,建立针对沥青路面预养护新的综合评价模型。该模型结合实际工程经验、专家打分法和试验检测数据,在求取综合权重时,将主客观两种方法的中间过程相结合来计算得到各评价指标的综合权重系数,最后对预防性养护效果进行综合评价。以张家口地区某条公路沥青路面预养护工程为实例进行改进EW-AHP法预防性养护评价模型的应用,沥青材料性能的3个指标所占权重比EW-AHP法有所提高,同层次分析法相比相差不大,沥青低温性能指标的比重比EW-AHP和AHP有所提高,同熵权法相比有所降低,比较符合寒冷地区沥青的低温抗裂情况。结果表明该评价模型是可行的,研究结果可以为沥青路面预养护措施的应用提供技术支持。
[Abstract]:Through the laboratory test of a road section of slurry seal layer, it is found that the penetration and ductility of the pavement maintained by the slurry seal layer are improved. It can be concluded that the slurry sealing technology can effectively slow down the occurrence of low temperature disease of asphalt pavement. Preventive maintenance measures can improve asphalt performance to some extent. Referring to the evaluation methods of preventive maintenance of highway asphalt pavement at home and abroad, and combining with the evaluation indexes of pavement and material performance in domestic technical specifications, the paper puts forward adding asphalt performance index on the basis of traditional evaluation system. The pre-maintenance of asphalt pavement is evaluated from two aspects: pavement performance and asphalt performance. Considering the deficiency of the weight distribution method of evaluation index, a new comprehensive evaluation model for asphalt pavement pre-maintenance is established by improving the traditional entropy weight-analytic hierarchy process (AHP). The model combines with practical engineering experience, expert scoring method and test data, when the comprehensive weight is obtained, the intermediate process of subjective and objective methods is combined to calculate the comprehensive weight coefficient of each evaluation index. Finally, comprehensive evaluation of preventive maintenance effect is carried out. Taking the pre-maintenance project of a highway asphalt pavement in Zhangjiakou area as an example, the application of the improved EW-AHP preventive maintenance evaluation model shows that the weight of the three indexes of the asphalt material performance is higher than that of the EW-AHP method, but the difference is not significant with the analytic hierarchy process. Compared with EW-AHP and AHP, the specific gravity of low temperature performance index of asphalt is higher than that of EW-AHP and AHP, and it is lower than that of entropy weight method, which accords with the low temperature crack resistance of asphalt in cold area. The results show that the evaluation model is feasible and the research results can provide technical support for the application of asphalt pavement pre-maintenance measures.
【作者单位】：河北建筑工程学院土木工程学院;
【基金】：河北省交通运输厅科技计划项目(Y-2014037) 河北省科技厅应用基础研究计划项目(15967619D)
【分类号】：U418.6

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