Research Article
Analysis of the Compressibility Effect of Overburden in a Deep Shield Tunnel Based on the Effect of the Pressure Arch
Table 3
Basic properties of the soil.
| | Material | Unit weight (kN/m3) | Elastic modulus (MPa) | Poisson’s ratio | Cohesion (kPa) | Friction angle |
| | Plastic clay | 20 | 20 | 0.32 | 30 | 14 | | Hard plastic clay | 25 | 32 | 0.29 | 31 | 15 | | Silt | 18.7 | 10 | 0.38 | 12 | 20 |
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