Study of the Construction Sequence of Overlapping Tunnels by the Shield Tunneling Method: A Case Study of the Longest Overlapping Tunnel in China

<div>(a) Contour map of the vertical displacement of the stratum after the excavation of the upper tunnel. (b) Contour map of the vertical displacement of the stratum after the excavation of the lower tunnel (h: the distance between the upper and lower tunnels).</div>

Advances in Civil Engineering

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Figure 8

Figure 8: Study of the Construction Sequence of Overlapping Tunnels by the Shield Tunneling Method: A Case Study of the Longest Overlapping Tunnel in China 

Figure 8 | Study of the Construction Sequence of Overlapping Tunnels by the Shield Tunneling Method: A Case Study of the Longest Overlapping Tunnel in China 