Research Article
Study on Antiseismic Effect of Different Thicknesses of Shock Absorption Layer on Urban Shallow Buried Double Arch Rectangular Tunnel
| Material name | Weight (N/m3) | Poisson’s ratio | Modulus (Pa) | Friction angle (°) | Cohesion (Pa) |
| Surrounding rock | 2.2 × 104 | 0.30 | 5 × 109 | 35.0 | 5 × 105 | Bedrock | 2.5 × 104 | 0.20 | 2 × 1010 | 50.0 | 1.5 × 106 | Tunnel lining | 2.6 × 104 | 0.20 | 3.25 × 1010 | — | — | Cushion | 2.4 × 104 | 0.20 | 2.25 × 1010 | — | — | Shock absorption layer | 1 × 104 | 0.45 | 3 × 1010 | 0.5 | 5 × 106 | Silty clay | 1.94 × 104 | 0.36 | 1.71 × 1010 | 21.0 | 4.4 × 104 |
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