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

<div>The crown settlement of existing tunnel with the undercrossed angle 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 12

Figure 12: Numerical Analysis on the Behavior of Existing Tunnels Subjected to the Undercrossed Shield Tunneling at a Small Proximity 