Deformation Analysis of a New Subway Transfer Channel Closely Undercrossing an Existing Station

Figure 4

Surface convergence of rectangular tunnels with different burial depths: (a) width = 10 m, height = 5 m; (b) width = 15 m, height = 7 m; (c) width = 20 m, height = 10 m; (d) width = 23, height = 9 m.

(a)

(b)

(c)

(d)