Analysis of Structural Response of Subway Shield Tunnel Lining under the Influence of Cavities
Table 3
Physical and mechanical parameters of soil layers.
Soil type
Natural gravity /kN·m−3
Saturated gravity /kN·m−3
Friction angle /°
Cohesion force /kPa
Poisson’s ratio/
Elastic modulus E/MPa
Layer thickness/m
Miscellaneous fill
18.5
19.1
13
11
0.30
14
3.0
Silty clay
19.5
20.4
12
28
0.36
18
4.0
Medium sand
20.5
21.8
30
0
0.30
30
4.0
Coarse sand
20.5
21.9
33
0
0.30
32
3.5
Gravelly sand
21.3
22.1
37
0
0.30
34
4.0
Strongly weathered muddy siltstone
22.4
22.5
25
40
0.32
80
3.0
Moderately weathered muddy siltstone
24.1
24.5
32
350
0.26
790
2.5
Tunnel segment (C50)
—
26.5
—
—
0.2
3.1 × 104
—
Note. The horizontal coordinates of the graphs in the article correspond to the location of the tunnel liner section as shown in Figure 8, and the graphs below with the angle as the horizontal coordinate are all based on this standard.
