Study on Numerical Simulation of Surrounding Rock Structure Safety of Urban Underwater Shield Tunnel: A Case in Chongqing

Figure 18

The internal force nephogram of lining segment installed at YCK22 + 773.00 cross-section (left tunnel). (a) Bending moment after the left-line excavation is completed, (b) axial force after the left-line excavation is completed, and (c) shear force after the left-line excavation is completed.

(a)

(b)

(c)