Numerical Simulation on Dynamic Response of Existing Tunnel to Moving-Axle Loads under the Influence of Oblique Shield Crossing the Intersection Area

Figure 9

Peak acceleration of observation points on the existing tunnel: (a) shield excavation reaches the 15th ring on the left; (b) shield excavation reaches the 30th ring on the left; and (c) shield excavation reaches the 44th ring on the left.

(a)

(b)

(c)