The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region

Table 4

ANOVA table for the models for assessing of the different positions in various in situ stress states.

Position	Source	Sum of squares	DF	Mean square	F ratio	Probability (f)
Roof	KH	20582.9	4	5145.72	146.69	0.00
	φ	5689.5	9	632.17	18.02	0.00
	Error	1262.9	36	35.08	—	—
	Total	27535.3	49	—	—	—
Floor	KH	13242.3	4	3310.57	146.84	0.00
	φ	3655.8	9	406.2	18.02	0.00
	Error	811.6	36	22.54	—	—
	Total	17709.7	49	—	—	—
Corner	KH	3460.39	4	865.099	142.55	0.00
	φ	982.5	9	109.167	17.99	0.00
	Error	218.48	36	6.069	—	—
	Total	4661.37	49	—	—	—
Spandrel	KH	3227.38	4	806.844	144.12	0.00
	φ	903.46	9	100.385	17.93	0.00
	Error	201.54	36	5.598	—	—
	Total	4332.38	49	—	—	—
Sidewall	KH	3227.38	4	806.844	144.12	0.00
	φ	903.46	9	100.385	17.93	0.00
	Error	201.54	36	5.598	—	—
	Total	4332.38	49	—	—	—