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

Table 4

Calculated cases of stochastic analysis of parallel twin tunnels (L_x = 2.0D).

Working condition name	Variable	Construction sequence	Coefficient of variation COV	Scales of fluctuation
				Vertical θz	Transverse θx	ξ^∗
MCS-z1	θz	Right first and then left	0.2	2Lx	8.0D	2
MCS-z2				Lx		4
MCS-z3				Lx/2		8
MCS-z4				Lx/4		16
MCS-z5				Lx/8		32
MCS-z6				Lx/16		64
MCS-z7				Lx/32		128
MCS-x1	θx	Right first and then let	0.2	0.25D	Lx/4	2
MCS-x2					Lx/2	4
MCS-x3					Lx	8
MCS-x4					2Lx	16
MCS-x5					4Lx	32
MCS-x6					8Lx	64
MCS-x7					+∞	∞

^∗ξ is the anisotropic coefficient, and , the same below.