Research Article
A Hybrid Model for Prediction in Asphalt Pavement Performance Based on Support Vector Machine and Grey Relation Analysis
Table 1
Datasheet of RDI and various influencing factors of Guangyun Expressway (2011–2018).
| | Year | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 |
| | RDI | 94 | 90.2 | 90.1 | 91.4 | 89.8 | 86.4 | 84.6 | 85.5 | | PCI | 99.7 | 97.9 | 97.1 | 95.1 | 92.5 | 91.4 | 88.7 | 87.5 | | SRI | 98 | 95.5 | 89.5 | 80.8 | 86.9 | 84.2 | 84.4 | 85.6 | | SSR | 2.61 | 1.63 | 1.58 | 1.92 | 1.36 | 1.27 | 1.35 | 1.15 | | Service life | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | | Equivalent single axle loads (10³) | 1214 | 1504 | 1600 | 1860.15 | 1984.46 | 2173.91 | 2386.93 | 2023.45 | | Maintenance funds (/million yuan) | 3.23 | 0.875 | 8.15 | 6.34 | 7.64 | 8.54 | 8.0 | 6.57 | | Annual average rainfall (/mm) | 1667.7 | 1490.5 | 1647.6 | 2224.5 | 1752.5 | 1645.6 | 2321 | 2013.1 | | Mean value of soil moisture | 17.4 | 17.8 | 19.5 | 22.1 | 18.6 | 17.5 | 22.4 | 19.1 | | Mean value of environment humidity (%RH) | 75.3 | 74.5 | 83.8 | 77.3 | 76 | 73.7 | 72.1 | 88.8 | | Annual maximum wind speed (m/s) | 7.4 | 6.2 | 6.1 | 5.8 | 5.3 | 6.3 | 5.6 | 7.9 | | Highest temperature of environment (/°C) | 37.6 | 37.8 | 38.9 | 39.2 | 39.6 | 39 | 40.4 | 38.2 | | Lowest temperature of environment (/°C) | 3.4 | 2.5 | 2.5 | 2.7 | 0.1 | 3.8 | 3.7 | 4.2 | | Highest temperature of road surface (/°C) | 65.1 | 61.8 | 60.3 | 62.4 | 68.5 | 62.5 | 65.1 | 65.2 | | Lowest temperature of road surface (/°C) | 4.2 | 6.3 | 5.9 | 4.3 | 5.9 | 6 | 6.4 | 5.8 | | Highest temperature of upper surface (/°C) | 55.1 | 56.2 | 57.1 | 60.2 | 58.6 | 58.8 | 57.9 | 63.1 | | Lowest temperature of upper surface (/°C) | 7.5 | 7.9 | 6.9 | 7.8 | 6.5 | 7.5 | 8 | 8.1 | | Highest temperature in middle surface (/°C) | 56.7 | 60.3 | 59.4 | 58.5 | 60.5 | 59.4 | 61.2 | 42.8 | | Lowest temperature in middle surface (/°C) | 6.3 | 5.4 | 5.8 | 6.5 | 6.8 | 6.9 | 6 | 6.1 | | Highest temperature in lower surface (/°C) | 46.7 | 47.6 | 46.9 | 45.5 | 44.2 | 46.7 | 43.2 | 44.9 | | Lowest temperature in lower surface (/°C) | 9.1 | 8.5 | 8.9 | 9.3 | 9.5 | 10.2 | 9.8 | 10.4 | | Annual cumulative total radiation | 1014 | 1085 | 1045 | 1054 | 1240 | 1093 | 1105 | 1166 |
|
|
