Elastic-Plastic Numerical Analysis of Tunnel Stability Based on the Closest Point Projection Method Considering the Effect of Water Pressure

Figure 13

The change process of the plastic zone with the different pore water pressure.

(a) Pore water pressure is 0 MPa

(b) Pore water pressure is 0.1 MPa

(c) Pore water pressure is 0.25 MPa

(d) Pore water pressure is 0.3 MPa

(e) Pore water pressure is 0.5 MPa

(f) Pore water pressure is 0.6 MPa