Treatment and Effect of Loess Metro Tunnel under Surrounding Pressure and Water Immersion Environment

Table 6

Analysis of principal stress change at annular measuring point of tunnel (kPa).

Measure point		A	B	C	D	E	F	G	H
Section #1	Maximum principal stress	-17.94	3.15	88.76	142.68	34.89	142.69	70.58	13.27
	Minimum principal stress	-5.68	2.68	4.08	8.78	7.01	8.81	4.11	2.66
Section #2	Maximum principal stress	-15.74	11.90	60.93	95.94	6.70	95.96	56.27	1.21
	Minimum principal stress	31.23	1.95	0	0	0	1.95	31.24	17.70
Section #3	Maximum principal stress	-9.60	8.02	27.09	27.44	-10.54	27.37	27.05	8.08
	Minimum principal stress	34.67	41.65	30.33	20.31	36.59	14.96	18.44	6.62