Table 1 Soil profiles and properties of test site.

From: Field study on heat transfer performance and thermo-mechanical properties of pre-bored PHC energy pile

Layer No.

Soil Layer

H (m)

w (%)

γ (kN/m3)

e

LL

PL

c (kPa)

φ (°)

0

Plain fill

1

       

1

Clayey silt 1

2

28.8

18.9

0.809

33.0

24.3

12.7

17.8

2

Muddy clay 1

2

40.2

17.7

1.124

36.9

21.5

11.3

10.2

3

Clayey silt 2

9

28.2

19.0

0.803

33.1

24.1

12.0

19.5

4

Silt

5

26.8

19.1

0.761

32.0

23.4

12.7

20.9

5

Muddy clay 2

8

39.6

17.7

1.107

21.5

11.7

12.0

10.4

6

Silt clay 1

9

34.8

18.2

0.987

38.5

22.1

26.0

12.7

7

Silty clay 2

7

34.9

18.2

0.978

38.2

22.8

25.4

14.3

8

Fine sand

7

19.4