The Influence of Small Clear-Distance Tunnel Construction on Adjacent High-Voltage Transmission Tower Foundation

Figure 9

Vertical displacement cloud pictures under different construction sequence. (a) Scheme 1: excavation of the left tunnel followed by the right tunnel. (b) Scheme 2: excavation of the right tunnel followed by the left tunnel. (c) Scheme 3: excavation of the two tunnels at the same time.

(a)

(b)

(c)