Research Article
Study on Stability of Shield Tunnel Excavation Face in Soil-Rock Composite Stratum
Table 1
Excavation scheme and parameter value table.
| | Scheme no. | Type | Name | Density (kg/m3) | Elastic modulus (MPa) | Poisson’s ratio | Cohesion (kPa) | Internal friction angle (°) |
| | 1 | Soil mass | Clay | 1970 | 5 | 0.20 | 10 | 18 | | Rock mass | Moderately weathered limestone | 2500 | 2000 | 0.21 | 100 | 30 |
| | 2 | Soil mass | Clay | 1970 | 5 | 0.20 | 10 | 18 | | Rock mass | Strongly weathered mudstone | 1920 | 40 | 0.26 | 37.3 | 25.6 |
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