Research Article
Study on Construction Influence of Shield Tunnel of Urban Rail Transit on Large-Section Mining Tunnel
Table 7
Physical and mechanical parameters.
| Parameter types | Constitutive model | Elastic modulus (GPa) | Cohesion (kPa) | Internal friction angle (°) | Poisson’s ratio | Unit weight (kN/m3) |
| Soil layer | MC | 0.7 | 100 | 23.5 | 0.35 | 24.1 | Initial support | Elastic | 30.5 | —— | —— | 0.25 | 26.4 | Temporary support | Elastic | 34.7 | —— | —— | 0.25 | 27.1 | System anchoring bolt | Elastic-plastic | 206 | 150 | 24 | —— | 79 | Advance pipe shed | Elastic-plastic | 206 | 170 | 30 | —— | 79 | Shield segment | Elastic | 37.5 | —— | —— | 0.2 | 26.5 | Steel shell | Elastic | 206 | —— | —— | 0.2 | 79 | Equivalent circle zone | Elastic | 1.0 | —— | —— | 0.2 | 20.5 |
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