Study on Underground Utility Tunnel Fire Characteristics under Sealing and Ventilation Conditions

Figure 11

CO concentration at 1.8 m height along the tunnel with different time. (a) FS1. (b) FS2. (c) FS3. (d) FS4. (e) FS5. (f) FS6.

(a)

(b)

(c)

(d)

(e)

(f)