Influence of Support Parameter and Excavation Methods on Statistical Distribution Characteristics of Surrounding Rock Pressure in Shallow-Buried Metro Tunnel

Figure 8

Distribution characteristics of surrounding rock pressure of support structure with different thicknesses of subexcavation: (a) 20 cm, (b) 30 cm, (c) 40 cm, (d) 50 cm, (e) 60 cm, and (f) 70 cm.

(a)

(b)

(c)

(d)

(e)

(f)