Integrative evaluation index system for preventive maintenance timing of asphalt pavement
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摘要: 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。Abstract: 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.
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Key words:
- pavement engineering /
- asphalt pavement /
- preventive maintenance /
- evaluation index
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表 1 路面性能指标检测值
Table 1. Measurement values of pavement performance indices
路况指标 2000年 2001年 2002年 2003年 2004年 2005年 IPCI0 98.35 88.63 84.98 82.57 79.75 75.85 IIRI0 1.883 1.916 2.021 2.201 2.375 2.479 ISFC0 62.47 57.28 50.49 43.30 32.71 24.93 IARI0 4.7 5.9 7.3 9.5 10.9 12.4 
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表 2 路面性能指标转换值
Table 2. Conversion values of pavement performance indices
路况指标Xi 2000年 2001年 2002年 2003年 2004年 2005年 xi(1) xi(2) xi(3) xi(4) xi(5) xi(6) IPQI 92.40 89.10 83.70 79.70 73.60 68.40 IPCI 98.35 88.63 84.98 82.57 79.75 75.85 IRQI 91.04 90.94 90.65 90.11 89.57 89.24 ISFC 92.03 89.02 83.62 75.78 60.34 47.24 IARI 83.72 81.37 78.31 72.81 68.88 64.35
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表 3 始点零化数据
Table 3. Zero clearing of initial data
Xi Xi(n) xi(1) xi(2) xi(3) xi(4) xi(5) xi(6) X0 0.00 -3.30 -8.70 -12.70 -18.80 -24.00 X1 0.00 -9.72 -13.37 -15.78 -18.60 -22.50 X2 0.00 -0.10 -0.39 -0.93 -1.47 -1.80 X3 0.00 -3.01 -8.41 -16.25 -31.69 -44.79 X4 0.00 -2.35 -5.41 -10.91 -14.84 -19.37
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表 4 绝对关联度中间数据
Table 4. Middle data of absduteness relation
Xi Xi(n) xi(1) xi(2) xi(3) xi(4) xi(5) xi(6) X0 0.00 0.00 0.00 0.00 0.00 0.00 X1 0.00 6.42 4.67 3.08 0.20 1.50 X2 0.00 3.20 8.31 11.77 17.33 22.20 X3 0.00 0.29 0.29 3.55 12.89 20.79 X4 0.00 0.95 3.29 1.79 3.96 4.63
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表 5 初值化数据
Table 5. Initialization data
Xi Xi(n) xi(1) xi(2) xi(3) xi(4) xi(5) xi(6) X0 1.000 0.964 0.906 0.863 0.797 0.740 X1 1.000 0.901 0.864 0.840 0.811 0.771 X2 1.000 0.999 0.996 0.990 0.984 0.980 X3 1.000 0.967 0.909 0.823 0.656 0.513 X4 1.000 0.972 0.935 0.870 0.823 0.769
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