Large-Scale Shaking Table Test of Seismic Response Laws for a Shallow Double-Arch Tunnel under Unsymmetrical Pressure with a Damping Layer

Table 4

Loading rule of the shaking table test.

Number	Cases	Peak acceleration (g)
		X	Z
1	WN-1	—	—
2	WC-X-1	0.1	—
3	WC-Z-1	—	0.067
4	WC-XZ-1	0.1	0.067
5	WN- 2	—	—
6	WC-X-2	0.2	—
7	WC-Z-2	—	0.133
8	WC-XZ-2	0.2	0.133
9	WN- 3	—	—
10	WC-X-3	0.4	—
11	WC-Z-3	—	0.267
12	WC-XZ-3	0.4	0.267
13	WN- 4	—	—
14	WC-X-4	0.6	—
15	WC-Z-4	—	0.4
16	WC-XZ-4	0.6	0.4