Research Article
Analysis of the Mechanical Characteristics of Different Track Bed Types in Heavy-Haul Railway Tunnels
Table 1
Structural parameters and class III surrounding rock parameters on the Zhangtang Railway.
| | Structure | Elastic modulus (GPa) | Poisson’s ratio | Severe (kN·m−3) | Cohesion (MPa) | Friction (°) |
| | Surrounding rock | 13.0 | 0.24 | 24.0 | 0.012 | 38 | | Primary support | 28.0 | 0.20 | 23.0 | — | — | | Secondary lining | 31.0 | 0.20 | 23.0 | — | — | | Inverted arch filling | 28.5 | 0.20 | 23.0 | — | — | | Inverted arch | 31.0 | 0.20 | 23.0 | — | — | | Ballastless slab track | 33.5 | 0.20 | 25.0 | — | — | | Ballast bed | — | 0.25 | 18.5 | — | — |
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