Table 4 Empirical value of cohesion and friction angle of soft clay soil and reinforced soft clay soil with individual and clustered encapsuled POM columns.

From: Experimental study on the use of polyoxymethylene plastic waste as a granular column to improve the strength of soft clay soil

No. of column

Confining pressures (kPa)

Column dia. (mm)

Column depth (mm)

SAR

VIR

DPR

CAR

c (kPa)

Φ (°)

0

100

0

0

0

0

0

0

12.63

 

200

22.3

400

 

1

100

10

30

4.00

1.20

0.3

3

13.73

 

200

24.7

400

 

1

100

10

50

4.00

2.00

0.5

5

18.33

 

200

27.1

400

 

1

100

10

80

4.00

3.20

0.8

8

23.43

 

200

27.9

400

 

1

100

16

30

10.24

3.10

0.3

1.88

13.73

 

200

24.5

400

 

1

100

16

50

10.24

5.10

0.5

3.13

23.83

 

200

28.2

400

 

1

100

16

80

10.24

6.49

0.8

5

25.03

 

200

29.4

400

 

3

100

10

30

12.00

3.60

0.3

3

17.63

 

200

25.7

400

 

3

100

10

50

12.00

6.00

0.5

5

17.83

 

200

26.2

400

 

3

100

10

80

12.00

9.60

0.8

8

20.73

 

200

27.6

400

 

3

100

16

30

30.72

9.30

0.3

1.88

13.23

 

200

23.7

400

 

3

100

16

50

30.72

15.30

0.5

3.13

20.73

 

200

27.7

400

 

3

100

16

80

30.72

19.47

0.8

5

24.73

 

200

28.4

400

 
  1. SAR, Substitute Area Ratio; VIR, Volume Infusion Ratio; DPR, Depth Penetration Ratio; CAR, Column Aspect Ratio; C, Cohesion; and, Φ, Friction Angle.
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