Fig. 11

Vertical displacement of the slope and surface under different excavation conditions. (a) Z-direction displacement of the portal slope in section K43 + 925, (b) vertical displacement of the surface in the longitudinal section of the right tunnel in section K43 + 925, (c) Z-direction displacement of the portal slope in section K43 + 915, and (d) Z-direction displacement of the surface in the longitudinal section of the right tunnel in section K43 + 915.