Analytical Solution for Circular Tunnel under Obliquely Incident P Waves considering Different Contact Conditions

Table 2

Error index E (%) for tunnel thrust and moment in half‐space under obliquely incident P waves considering different buried depths and ground conditions.

h/R	Case 1 (soft soil)				Case 2 (medium stiff soil)				Case 3 (rock)
	0°		30		0°		30°		0°		30°
	T	M	T	M	T	M	T	M	T	M	T	M
2.0	31.59	36.49	15.61	7.44	27.55	27.55	11.8	10.73	27.55	18.56	7.76	13.25
3.0	16.54	22.68	11.45	7.25	15.40	15.40	4.79	5.56	15.40	14.73	5.32	6.36
4.0	10.74	13.71	8.81	7.05	10.64	10.64	3.84	4.53	10.64	9.80	4.50	5.75
5.0	8.77	11.39	7.54	6.77	8.09	8.09	3.36	4.30	8.09	9.69	4.37	4.82
6.7	6.14	7.29	6.38	6.10	5.68	5.68	2.95	4.13	5.68	7.49	4.25	4.75
10.0	3.27	3.25	5.12	5.64	3.64	3.64	2.67	3.85	3.64	5.05	4.20	4.66
13.3	1.89	2.15	3.99	5.05	2.61	2.61	2.55	3.62	2.61	3.71	4.11	3.78
16.7	1.28	1.82	2.58	4.64	1.92	1.92	2.49	3.55	1.92	3.05	3.97	3.48