Experimental Investigation on the Influence of Regional Concrete Spalling on Shield Tunnel Segments

Table 3

Physical and mechanical parameters of soil.

Parameter	c (MPa)	Φ (°)	E (MPa)	γ (kN·m^−3)
Prototype material	18.1∼21.9	7.9∼11.3	4.6∼6.1	17.2∼19.0
Model material	1.67	9	0.42	18
Corresponding prototype value	20	9	5	18