Table 1 Physical and mechanical parameters of each stratum in the test ring section.

From: Measurement and analysis of surface settlement caused by construction of quasi-rectangular shield tunnel in rich water-sand stratum

No.

Layer

γ (kN/m3)

c (kPa)

φ (°)

E (MPa)

Thickness (m)

1

Fill soil

18.0

10.0

15.0

5.0

1.1

31

Clayey silt

17.7

13.5

22.0

5.9

3.2

21

Silty clay

19.9

21.5

13

4.5

7.3

32

Clayey silt

19.1

15.0

24.0

6.7

2.2

22

Clayey silt

18.8

19.0

10.5

4.6

4.2

33

Clayey silt

19.3

15.0

22.0

8.5

3.0

41

Silt sand

19.5

3.0

30.0

20.0

3.6

51

Fine sand

20.0

2.0

32.0

25.0

2.1

51B

Silty clay

20.0

15.6

22.0

9.0

9.0

51 A

Clayey silt

20.0

2.0

32.0

20.5

8.5

51

Fine sand

19.5

31.3

15.6

8.5

2.0

21

Silty clay

18.0

10.0

15.0

5.0

5.0

  1. Note: γ is the gravity of the soil, c is the cohesion of the soil, φ is the internal friction angle of the soil, and E is the elastic modulus of the soil.