Stability Analysis of Neighborhood Tunnels with Large Section Constructed in Steeply Jointed Rock Mass

Table 8

Maximum comparison of shot concrete.

Types of case	Maximum of compressive stress			Maximum of tensile stress
	Value (MPa)	Safety factor	Location near	Value (MPa)	Safety factor	Location near
With joint	−10.26	2.44	Right shoulder of left tunnel	0.44	4.05	Right shoulder of right tunnel
No joint	−4.25	5.88	Right shoulder of left tunnel	0.34	5.24	Crown of left tunnel

Safety factor is equal to the ratio between strength and stress of shot concrete.