Table 3 Assessment standard of extreme high temperature climate in cold regions
From: Analysis methodology and assessment indices of vulnerability for asphalt pavement in cold regions
Assessment Index | Micro | Mild | Moderate | Severe | Extreme |
|---|---|---|---|---|---|
Extreme maximum temperature (°C) | < 18 | 18 ~ 25 | 25 ~ 32 | 32 ~ 39 | ≥39 |
High temperature duration (d) | < 5 | 5 ~ 8 | 8 ~ 11 | 11 ~ 15 | ≥15 |
Annual average solar radiation (kW/m2) | < 1000 | 1000 ~ 1350 | 1350 ~ 1700 | 1700 ~ 2000 | ≥2000 |
Route design (Road horizontal, vertical and horizontal design) | Reasonable design and turning radius | Proper design and turning radius | Large longitudinal slope or large turning radius, the deviation≤10% | Large longitudinal slope or large turning radius, the deviation between 10%–20% | Poor design or large turning radius, and deviation≥30% |