Research Article
Prediction on Ground Settlement Deformation and Influence of Urban Buildings in the Construction Process of Existing Tunnel Reconstruction
Table 2
Material physical and mechanical parameters of calculation model.
| Material | Density | Elastic modulus | Poisson’s ratio | Internal friction angle | Dilatancy angle | Stress flow rates | (kg/m3) | (GPa) | | (°) | (°) | |
| Surrounding rock | 1900 | 0.095 | 0.35 | 25 | 15 | 1.0 | Tube shed layer | 2200 | 10.0 | 0.25 | 30 | 20 | 1.0 | Primary lining | 2300 | 23.0 | 0.2 | | | | Secondary lining | 2400 | 28.0 | 0.2 | | | | Existing tunnel structure | 2350 | 25.0 | 0.2 | | | |
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