Mechanical Characteristics of Variable Cross-Section Immersed Tunnels under Spatial Differential Settlement

Table 1

The physicomechanical parameters of the soil and the structure.

Soil type	Density, ρ (g·cm^−3)	Consolidated quick shear		Compression modulus (MPa)	Poisson’s ratio
		Cohesion, c (kPa)	Internal friction angle, φ (°)
Fill	1.80	7.80	8.20	2.51	0.32
Silty fine sand	1.76	2.00	20.0	2.49	0.28
Plastic loam	1.95	33.2	16.2	4.10	0.33
Hard plastic loam	1.96	38.0	17.1	5.76	0.30
Completely weathered rock	2.07	42.1	22.3	14.8	0.25
Strongly weathered rock	2.10	55.2	26.1	25.0	0.24
Mildly weathered rock	2.50	200	28.0	80.0	0.30
Weakly weathered rock	2.60	500	30.0	150	0.29
Structure type	Density, ρ (g·cm^−3)	Cohesion, c (kPa)	Internal friction angle, φ (°)	Elastic modulus (MPa)	Poisson’s ratio
Segment C40	2.43	5000	58	32500	0.167
Reinforcement	7.85	210000	0	200000	0.2
Reinforced concrete	2.5	5265	59.3	—	—
Rubber bearing	0.93	—	—	250–12500	0.499