Transmission And Substation Foundations - Technical Design Manual (TD06088E)

TABLE 4-12. REPORTED CORRELATIONS BETWEEN SPT N-VALUE AND PILE SIDE RESISTANCE (FROM LUTENEGGER 2011) Pile Type Soil β α

Reference

granular

0

2.0

Meyerhof (1976)

miscellaneous soils .(f s < 170 kPa)

10

3.3

Decourt (1982)

cohesive

0

10

Shioi & Fukui (1982)

driven displacement

cohesive cohesionless

0 0

3 1.8

Bazaraa & Kurkur (1986)

sandy clayey

29 34

2.0 4.0

Kanai & Yubuuchi (1989)

misc

0

1.9

Robert (1997)

granular

0

1.0

Meyerhof (1976)

granular

55

5.8

Fujita et al. (1977)

cohesionless

0

3.3

Wright & Reese (1979)

DESIGN METHODOLOGY

cohesive (f s < 170 kPa)

10

3.3

Decourt (1982)

cohesive

0

5.0

Shioi & Fukui (1982)

cohesive cohesionless

0 0

1.8 0.6

Bazaraa & Kurkur (1986)

residual soil & weathered rock

0

2.0

Broms et al. (1988)

clay sand

0 0

1.3 0.3 3.9 4.9

Koike et al. (1988)

35 24

sandy soil cohesive

Kanai & Yubuuchi (1989)

bored

residual soil

0

4.5

Winter et al. (1989)

gravel sand silt clay

0 0 0 0

6.0 4.0 2.5 1.0

Hirayama (1990)

residual soils

0

2.0

Chang & Broms (1991)

clayey soil sandy soil

0 0

10.0 3.0 1.18 0.65

Matsui (1993)

17.3 18.2

misc.

Vrymoed (1994)

misc.

0

1.9

Robert (1997)

sand

0

5.05

Kuwabara & Tanaka (1998)

weathered rock

0

4

Wada (2003)

cohesionless cohesive cohesionless (f s < 200 kPa) cohesive (f s < 150 kPa)

0 0

5.0 10.0

Shoi & Fukui (1982)

30

2.0

cast-in-place

Yamashita et al.(1987)

0

5.0

Note: f s = β + α N (f s in units of kPa)

Page 4-33 | Hubbell Power Systems, Inc. | All Rights Reserved | Copyright © 2017