Research on the Algorithm for Composite Lining of Deep Buried Water Conveyance Tunnel

Table 4

Results of finite element calculation (MPa).

Stress direction	Inner lining		Outer lining
	Horizontal axis	Vertical axis	Horizontal axis	Vertical axis
Radial stress	−0.316	−0.315	−0.104	−0.113
Circumferential stress	1.201	1.262	1.141	1.146