Research Article
The Influence of Hydraulic Conditions on the Stability of Dual Circular Tunnels in Unsaturated Soils
Figure 9
Collapse mechanisms for = 20°, H/D = 1, and S/D = 3: (a) /D = 1, (b) /D = 1.5, (c) /D = 2, (d) /D = 2.5, (e) /D = 3, and (f) /D = 4.
(a) |
(b) |
(c) |
(d) |
(e) |
(f) |