Numerical Analysis on the Behavior of Existing Tunnels Subjected to the Undercrossed Shield Tunneling at a Small Proximity

<div>The crown settlement curves of existing tunnel with the vertical spacing variation. (a) The settlement curves of the existing tunnel. (b) The linear fitting of the maximum settlement value of the existing tunnel.</div>

Advances in Civil Engineering

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Figure 14

Figure 14: Numerical Analysis on the Behavior of Existing Tunnels Subjected to the Undercrossed Shield Tunneling at a Small Proximity 