Study on Structural Service Performance of Heavy-Haul Railway Tunnel with Voided Base

Table 8

Maximum principal stress of the inverted arch in different cases (MPa).

Case		Case 1	Case 2	Case 3	Case 4	Case 5	Case 6	Case 7	Case 8
Maximum principal stress	Max	1.12	1.2	1.33	1.41	1.58	1.65	1.43	1.44
	Min	0.295	0.314	0.376	0.415	0.481	0.508	0.422	0.430