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

Table 1

Different configurations of twin tunnels.

Configurations	Lx^1/D^2	Lz^1/D	Inclination angle α (°)
Parallel type	2.0, 2.5, 3.0, 4.0, and 5.0	0	0
Overlapping type	0	2.0	90
Shoulder-mounted type	2.0 and 2.5	2.0	45 and 39

¹L_x and L_z are the horizontal and vertical distances of the tunnel axis, respectively; ²tunnel diameter D is 6.2 m.