Research Article
Effect of Longitudinal Gradient on 3D Face Stability of Circular Tunnel in Undrained Clay
Figure 6
Layout of the derived continuous velocity field for shallow tunnel collapse (C/D = 0.5, γD/su = 10, and η = 6%): (a) tunneling in downward movement; (b) tunneling in upward movement.
| (a) |
| (b) |