Research Article
Blasting-Induced Vibration Response of the Transition Section in a Branching-Out Tunnel and Vibration Control Measures
Table 4
Calculation parameters of surrounding rock and concrete.
| | Materials | Density (g/cm3) | Elasticity modulus (GPa) | Poisson’s ratio | Shear modulus (GPa) | Compressive strength (GPa) |
| | III-level surrounding rock | 2.5 | 40 | 0.28 | 18.5 | 0.058 | | IV-level surrounding rock | 2.2 | 20 | 0.32 | 16.5 | 0.018 | | V-level surrounding rock | 1.8 | 5 | 0.37 | 10.5 | 0.006 | | C25 concrete | 2.5 | 40 | 0.18 | 25.0 | 0.145 |
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