Research Article
Study on the Influence of Train Dynamic Load on underneath Tunnel Cast-in-Situ Concrete in Early Age
Table 4
Mechanical parameters of surrounding rock.
| | Grade | Density (kN/m³) | Elastic modulus (GPa) | Poisson’s ratio | Friction angle (°) | Cohesion (MPa) |
| | III | 24 | 15 | 0.25 | 45 | 1.1 | | IV | 21.5 | 4 | 0.3 | 33 | 0.45 | | V | 18.5 | 1.5 | 0.35 | 23.5 | 0.13 |
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