Experimental Study on Prevention of Calcium Carbonate Crystallizing in Drainage Pipe of Tunnel Engineering

Figure 1

Tunnel drainage pipes that are blocked by crystal. (a) Tunnel between Chongqing North Railway Station and Yulu Station. (b) Tunnel between Danzishi Station and Tushan Station. (c) New Zhongliang Mountain tunnel. (d) Tongluo Mountain tunnel.

(a)

(b)

(c)

(d)