Reliability Analysis of Safety Assessment of Buildings above Twin Shield Tunnels Based on Random Field Theory

Table 5

Calculated cases of stochastic analysis of shoulder-mounted twin tunnels (α = 45°).

Working condition name	Variable	Construction sequence	Coefficient of variation COV	Scales of fluctuation
				Vertical θz	Transverse θx	ξ
MCSd-z1	θz	Down first and then up	0.2	2Lz	8.0D	2
MCSd-z2				Lz		4
MCSd-z3				Lz/2		8
MCSd-z4				Lz/4		16
MCSd-z5				Lz/8		32
MCSd-z6				Lz/16		64
MCSd-z7				Lz/32		128
MCSu-z1	θz	Up first and then down	0.2	2Lz	8.0D	2
MCSu-z2				Lz		4
MCSu-z3				Lz/2		8
MCSu-z4				Lz/4		16
MCSu-z5				Lz/8		32
MCSu-z6				Lz/16		64
MCSu-z7				Lz/32		128

L_z = 2.0D.