Research Article
Analysis on Cooling Effect of Crushed-Rocks Embankment of Qinghai-Tibet High-Grade Road
Table 1
Thermal parameters of various materials in and beneath the embankment.
| Physical parameters | Heat conduction coefficient for frozen soil (W/(m·°C)) | Heat capacity for frozen soil (J/(m3·°C)) | Heat conduction coefficient for unfrozen soil (W/(m·°C)) | Heat capacity for unfrozen soil (J/(m3·°C)) | Latent heat (J/m3) |
| Ventilation duct | 1.54 | 2.016 × 106 | 1.54 | 2.016 × 106 | 0 | Crushed-rocks | 0.39 | 1.015 × 106 | 0.39 | 1.015 × 106 | 0 | Gravel fill | 1.98 | 1.913 × 106 | 1.92 | 2.227 × 106 | 2.04 × 107 | Silty clay | 1.35 | 1.879 × 106 | 1.13 | 2.357 × 106 | 6.03 × 107 | Weathered mudstone | 1.82 | 1.846 × 106 | 1.48 | 2.099 × 106 | 3.77 × 107 |
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