Research Article
Optimization Analysis of Deformation of Underlying Tunnel in Dewatering and Excavation of Phreatic Aquifer
Table 2
Soil layer hydrological parameters.
| | Layer | Soil type | Top elevation (m) | KH (m/d) | Kv (m/d) | Adopted method | Aquifer type | Water level (m) |
| | ① | Miscellaneous fill | 5.5∼1.57 | 6 | 6 | Experiment test | Phreatic aquifer | 3.489 | | ②1 | Silty fine sand | 1.57∼−4.3 | 16 | 8 | Experiment test | Phreatic aquifer | | ②2 | Silty fine sand | −4.3∼−9.92 | 16 | 8 | Experiment test | Phreatic aquifer | | ③ | Pebble | −9.92∼ | 20 | 10 | Empirical value | Phreatic aquifer |
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