Research Article
Construction Sequence Optimization and Settlement Control Countermeasures of Metro Tunnels Underpassing Expressway
Table 2
Supporting physical and mechanical parameters.
| | Type | Bulk density (kN/m3) | Modulus of elasticity (GPa) | Poisson's ratio | Thickness (mm) |
| | Initial support | 25 | 28 | 0.2 | 300 | | Middle partition | 25 | 28 | 0.3 | 300 | | Secondary lining | 25 | 32.5 | 0.2 | 300 |
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