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。
Through the indoor experiment of the slurry sealed section of a highway, it is found that the penetration and ductility of the surface layer of the slurry sealed road are improved, and the slurry seal technology can effectively reduce the occurrence of low-temperature defects on asphalt pavement and the preventive maintenance measure has some improvement effect on the asphalt performance. According 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 the domestic technical specification, the additional asphalt performance index is put forward on the basis of the traditional evaluation system to evaluate asphalt pavement preventive maintenance from the aspects of road performance and property of asphalt materials. Considering lack of the weight allocation method for evaluation indexes, a new comprehensive evaluation model for asphalt pavement preventive maintenance is established by improving the traditional entropy weight-analytic hierarchy process. The model uses the practical engineering experience,the expert scoring method and the experimental testing data while solving the comprehensive weights, and combines the middle processes of subjective and objective methods to calculate the comprehensive weight coefficients of the evaluation indexes, and to evaluate the effect of preventive maintenance at last. The preventive maintenance engineering of highway asphalt pavement in Zhangjiakou is used as an example for the application of the proposed method. It shows that （1） the weights of 3 indexes of asphalt material performance using the proposed method are higher than those using the traditional EW-AHP method, and almost the same as those using AHP method; （2） the proportion of asphalt performance index at low- temperature has increased compared with those using AHP and EW-AHP, and lower compared with those using EW method, it is suitable for the low temperature crack resistance of
出处
《公路交通科技》
CAS
CSCD
北大核心
2017年第9期8-13,共6页
Journal of Highway and Transportation Research and Development
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)
