Three-Dimensional Numerical Analysis of Compound Lining in Complex Underground Surge-Shaft Structure

Table 2

Crack width and reinforcement ratio of lining in different conditions.

Operation condition	Internal water		External water
	/mm	/%	/mm	/%
1st layer	0.0	0.16	0.0	0.16
2nd layer	0.0	0.16	0.0	0.16
3rd layer	0.0	0.16	0.0	0.16
4th layer	0.04	0.63	0.0	0.16
Number 1 draft tube	0.07	0.91	0.0	0.16
Number 2 draft tube	0.09	1.27	0.0	0.16
Number 3 draft tube	0.08	1.19	0.0	0.16
Tailrace tunnel	0.10	1.34	0.01	0.34
Impedance board	0.15	1.85	0.03	0.51