Research Article
Intelligent Risk Assessment for Dewatering of Metro-Tunnel Deep Excavations
Table 1
Hydraulic and mechanical properties of soil layers of southern airshaft foundation.
| No. | Soil layer | Thickness of soil layer (m) | Coefficient of permeability (cm/s) | Modulus of compressibility (MPa) |
| | Miscellaneous fill soil | 0.70~3.10 | | — | | Plain fill soil | 0.30~6.00 | | 6.5 | | Sandy silt | 3.4 | | 7.0 | | Sandy silt | 3.50~9.70 | | 8.5 | | Sandy silt | 1.00~5.90 | | 5.5 | | Silty sand and sandy silt | 1.60~7.00 | | 7.0 | | Silt | 4.20~10.95 | | 10.0 | | Sandy silt | 0.80~6.20 | | 5.5 | | Silt | — | | 10.5 | | Silty soft clay | 2.60~6.70 | | 2.6 | | Silty soft clay | 1.50~3.70 | | 2.7 | | Silty soft clay | 1.00~8.30 | | 2.8 | | Silt | 0.50~3.85 | | 8.0 | | Silty soft clay | 0.80~8.20 | | 3.0 | | Silty-fine sand | 1.80~8.50 | | 8.5 | | Silty clay | 1.90~4.30 | | 3.2 | | Silty clay | 2.80~4.60 | | 4.5 | (14)1 | Medium sand | — | | 11.0 | (14)2 | Rounded pebble | — | | — |
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