Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Table 3

Calculated stresses of selected lining sections in groups 1 and 2.

Surface	Case	Lining section				Case	Lining section
		25°	50°	75°	90°		25°	50°	75°	90°
Outer surface	1-1	1.55	3.54	2.88	5.48	2-1	1.55	3.54	2.88	5.48
	1-2	1.54	3.54	3.31	4.70	2-2	1.48	3.51	3.61	0.06
	1-3	1.53	3.53	3.20	3.45	2-3	1.46	3.50	4.16	−0.08
	1-4	1.46	3.50	4.16	−0.08	2-4	1.43	3.49	3.85	−0.54
	1-5	1.08	3.32	7.95	−5.86	2-5	1.37	3.47	4.02	−1.21
Inner surface	1-1	4.44	2.50	4.68	0.93	2-1	4.44	2.50	4.68	0.93
	1-2	4.45	2.49	4.02	1.91	2-2	4.52	2.50	3.45	5.68
	1-3	4.47	2.49	4.24	3.00	2-3	4.53	2.49	2.90	6.06
	1-4	4.53	2.49	2.90	6.06	2-4	4.55	2.48	3.20	6.85
	1-5	4.86	2.42	−3.23	9.83	2-5	4.61	2.46	6.23	8.10