Seismic Response Analysis of Secondary Lining Polymer Grouting Debonding Repair for Tunnel Construction Based on Parameter Inversion

Figure 20

Stress variation curves at the top of the secondary lining for different working conditions of the tunnel under the action of the Northridge waves (Class I site): (a) the variation curve of the maximum principal stress at the top of the secondary lining; (b) A minimum principal stress variation curve at the top of the secondary lining.

(a)

(b)