A New Unified Solution for Circular Tunnel Based on a Four-Stage Constitutive Model considering the Intermediate Principal Stress

Table 5

The influence of the parameter on the post-peak failure radii and surface displacement.

				(%)
0.0	1.579	1.549	1.339	0.24
0.2	1.448	1.422	1.226	0.20
0.4	1.358	1.336	1.150	0.18
0.6	1.293	1.273	1.094	0.16
0.8	1.243	1.225	1.051	0.15
1.0	1.203	1.186	1.017	0.14