Research Article
Mechanical Responses to Different Excavation Methods of Qichongcun Tunnel in Guiyang City, China
Table 7
Horizontal displacement of surrounding rocks.
| | Method | Left arch foot of tunnel I (mm) | Right arch foot of tunnel II (mm) | Left arch foot of tunnel II (mm) | Right arch foot of tunnel II (mm) |
| | Three-step method | −3.4 | 4.9 | −2.9 | 3.6 | | Single-side guide pit method | −1.5 | 2.4 | −0.9 | −1.1 | | Double-side guide pit method | −0.8 | 1.1 | −0.4 | −0.8 |
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