Dynamic Response of Parallel Overlapped Tunnel under Seismic Loading by Shaking Table Tests

Table 3

Similarity relations and ratios.

Material		Mass mix ratio (%)						Γ (kN·m^−3)	E (GPa)	C (kPa)	Φ (°)	σt (MPa)	σc (MPa)
		Quartz sand	Red clay	Cement	Gypsum powder	Talcum powder	Water
Surrounding rock	Prototype	—	—	—	—	—	—	20–23	1.72–5.69	200–700	27–39	—	2–20
	Model	70	30	5	3	—	10	17.5	0.04	6.9	32	—	0.15
Sliding body	Prototype	—	—	—	—	—	—	19	—	16.39	23.15	—	—
	Model	70	—	20	3	—	10	17.2	—	4.6	22	—	—
Sliding belt	Prototype	—	—	—	—	—	—	19.5–20	—	5	32	—	—
	Model	27	52	—	—	35	15	17.2	—	6.6	25	—	—
Lining structure	Prototype	—	—	—	—	—	—	—	30.8	—	—	2.0	23.2
	Model	—	—	—	1.1	—	1	—	0.77	—	—	0.05	0.58