Research Article
A New Design of Bridge-Subgrade Transition Sections Applied in Beijing-Shanghai High-Speed Railway
Table 2
Physical and mechanical characteristic parameters of the materials.
| Position | Material type | Constitutive model | Deformation modulus (MPa) | Poisson ratio | Internal friction angle (°) | Cohesion (kPa) | Density (g/cm3) |
| Bedding surface layer | Graded gravel | M-C | 120 | 0.33 | 27 | 70 | 1.95 | Bedding bottom layer | Sand stratum mixed with 28% of broken stones | M-C | 80 | 0.35 | 20 | 55 | 1.90 | Subgrade | M-C | 36.5 | 0.3 | 10 | 30 | 2.1 | Improved Sections | Graded gravel (+5% of cement) | M-C | 449 | 0.21 | / | / | 2.4 | Roller-compacted concrete | M-C | 307.1 | 0.26 | / | / | 2.3 | Abnormal graded gravel | M-C | 652.3 | 0.19 | / | / | 2.45 | Track/friction slab | Concrete | Linear elastic | 2.0E + 04 | 0.15 | / | / | 2.5 | Supporting layer | Concrete | Linear elastic | 2.0E + 04 | 0.15 | / | / | 2.5 | Abutment | Concrete | Linear elastic | 2.0E + 04 | 0.15 | / | / | 2.5 |
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