Experimental Study on Load Bearing Characteristics of Steel Fiber Reinforced Concrete Lining in the Soft Surrounding Rock Tunnel

Figure 12

Lining cracks of the steel fiber reinforced concrete. (a) The first crack (vault). (b) The second crack (inverted arch). (c) Local multipoint cracking (inverted arch). (d) Final failure state of the structure.

(a)

(b)

(c)

(d)