Effect of Vertically Propagating Shear Waves on Seismic Behavior of Circular Tunnels

Table 2

Geotechnical properties of sections layers.

Section	Layer type	Depth 𝑑 (m)	Density 𝛾 (kg/m^3)	Bulk modulus 𝐾 (Pa)	Shear modulus 𝐺 (Pa)	Friction angle 𝜑 (°)	Cohesion 𝐶 (Pa)
1	Coarse-grained	0–9	1800	18×10^6	18×10^6	35	3×10^3
	Coarse-grained	9–26	2050	18×10^6	18×10^6	35	3×10^3
	Fine-grained	26–39	2050	29×10^6	112×10^6	28	12×10^3
2	Fine-grained	0–7.5	1800	72.5×10^6	24×10^6	27	10×10^3
	Coarse-grained	7.5–15	1850	100×10^6	33×10^6	31	8×10^3
	Fine-grained	15–21	1900	83×10^6	28×10^6	26	14×10^3
	Coarse-grained	21–30	1900	140×10^6	52×10^6	32	8×10^3
	Fine-grained	30–36	2100	140×10^6	52×10^6	30	11×10^3
	Coarse-grained	36–45	2100	140×10^6	52×10^6	32	8×10^3