Research Article
Study on the Influence of Train Dynamic Load on underneath Tunnel Cast-in-Situ Concrete in Early Age
Table 1
Physical and mechanical parameter table.
| | Material | Density (kg/m3) | Elastic modulus (GPa) | Poisson’s angle (°) | Friction angle (°) | Cohesion (kPa) |
| | Ballast | 1800 | 0.5 | 0.3 | — | — | | Sleeper | 2500 | 25.0 | 0.2 | — | — | | Pipe segment (C50) | 2500 | 27.6 | 0.2 | — | — | | Primary lining (C30) | 2500 | 30.0 | 0.2 | — | — | | Secondary lining (C40) | 2500 | It depends on concrete age [39] | It depends on concrete age | — | — | | Backfill (C20) | 2500 | 25.5 | 0.2 | — | — | | Embankment filling | 2000 | 0.25 | 0.25 | 30 | 90 | | Silty clay | 1950 | 0.30 | 0.23 | 35 | 100 | | Moderately weathered mudstone (upper layer) | 2260 | 0.35 | 0.24 | 35 | 130 | | Moderately weathered sandstone | 2370 | 0.40 | 0.24 | 42 | 150 | | Moderately weathered mudstone (sublayer) | 2340 | 0.50 | 0.24 | 33 | 130 |
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