Computational Model of Outer Circle and Inner Ellipse Shield Tunnel Lining Structure

Table 2

Soil physical index.

Soil layer	Natural moisture content (%)	Mass density (g/cm^3)	Dry density (g/cm^3)	Saturation degree (%)	Void ratio (%)	Internal friction angle (°)	Cohesion (kPa)	Poisson’sratio
Vegetative fill	22.1	1.73	1.42	62.8	49	—	—	0.32
Loess-like soil	25.7	1.92	1.53	89.3	44	19.7	37	0.32
Loess	21.9	2.04	1.68	94	38	21	43	0.28
Ancient soil	24.2	2.01	1.62	94.4	40	18.3	38	0.32