Table 1 Physical and mechanical parameters of each soil layer.

From: Deformation analysis of large-section quasi-rectangular shield construction on existing underground pipelines and power tunnel

No.

Layer

γ(kN/m3)

c(kPa)

φ(°)

E

(MPa)

Thickness

(m)

â‘ 1

Fill soil

18.0

10.0

15.0

5.0

1.1

â‘¡31

Clayey silt

17.7

13.5

22.0

5.9

3.2

â‘¡32

Clayey silt

19.1

15.0

24.0

6.7

7.3

â‘¡22

Silty clay

18.8

19.0

10.5

4.6

2.2

â‘¡33

Clayey silt

19.3

15.0

22.0

8.5

4.2

â‘¡41

Silt

19.5

3.0

30.0

20.0

3.0

â‘¡51

Fine sand

20.0

2.0

32.0

25.0

3.6

â‘¡51 A

Clayey silt

20.0

15.6

22.0

9.0

2.1

â‘¡51

Fine sand

20.0

2.0

32.0

25.0

9.0

  1. Notes: γ-soil heaviness, c-soil cohesion, φ-angle of friction within soil, E- modulus of elasticity of soil.
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