Research Article
Reasonable Treatment Range of Karst Cave Encountered by Super-Large Diameter Shield Tunnel in Strongly Karst-Developed Area
Table 7
Calculation parameters of various materials.
| | Material | Elastic modulus (MPa) | Poisson ratio | Unit weight (kN/m3) | Internal friction angle (degree) | Cohesion (kPa) |
| | Clay | 13.0 | 0.45 | 20.3 | 16.0 | 45.0 | | Limestone | 10,700.0 | 0.30 | 24.0 | 44.0 | 1,100.0 | | Shield shell | 200,000.0 | 0.26 | 131.3 | — | — | | Segment | 27,600.0 | 0.20 | 25.0 | — | — | | Grouting layer | 5.0 | 0.30 | 17.0 | — | — |
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