Research Article
Mechanical Responses to Different Excavation Methods of Qichongcun Tunnel in Guiyang City, China
Table 6
Vertical displacement of surrounding rocks.
| | Method | Vault settlement of tunnel I (mm) | Bottom uplift of tunnel I (mm) | Vault settlement of tunnel II (mm) | Bottom uplift of tunnel II (mm) |
| | Three-step method | 21.7 | 16.7 | 17.1 | 11.6 | | Single-side guide pit method | 15.3 | 11.5 | 12.6 | 9.6 | | Double-side guide pit method | 11.7 | 9.7 | 9.7 | 8.1 |
|
|
