Research Article
Effects of Water Inrush from Tunnel Excavation Face on the Deformation and Mechanical Performance of Shield Tunnel Segment Joints
Table 2
Material properties.
| | Model component | Unit weight (kN/m3) | Elastic modulus (MPa) | Poisson ratio | External diameter (m) | Internal diameter (m) |
| | Shield machine block | 78.5 | 210,000 | 0.125 | 3.2 | 3.1 | | Over excavation soil | 20 | 0.8 | 0.2 | 3.24 | 3.2 | | Grouting layer (soft) | 20 | 7 | 0.2 | 3.24 | 3.1 | | Grouting layer (hard) | 25 | 50 | 0.3 | 3.24 | 3.1 | | Bolt | 78.5 | 210,000 | 0.125 | 0.03 | — | | Segment | 30 | 30,000 | 0.3 | 3.1 | 2.75 |
| | EPDM | C1 = 0.7 MPa; C2 = 0.35 MPa; q = 1.3 g/cm2 |
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