Study on the Large Deformation Characteristics and Disaster Mechanism of a Thin-Layer Soft-Rock Tunnel

Figure 14

Deformation characteristics of the surrounding rock of the tunnel under water absorption and softening: (a) change in the surrounding rock displacement before and after water absorption, (b) changes in the plastic zone of the tunnel before and after water absorption, and (c) changes in the maximum principal stress field of the tunnel before and after water absorption.

(a)

(b)

(c)