Experimental Study of Mechanical Characteristics of Tunnel Support System in Hard Cataclastic Rock with High Geostress

Figure 14

Distribution of shotcrete stress of initial support on the cross-section A (unit: MPa) (a) 7 days after excavation, (b) excavation of lower bench and inverted arch, (c) before construction of secondary lining, and (d) after deformation stabilization.

(a)

(b)

(c)

(d)