Pile Design and Construction Practice, Fifth edition

2.0

1.6

1.2

0.8

0.4

Influence factor

, lp

0.20

0.16

0.12

0123456789

200

L/B

100

50

20

10

1.0 Q

0.4

R=2

Ed

Qlp

BEd

Ed

B

=

R=

Ec

Ec

L

Gap

r

Figure 4.36Elastic settlement influence factors for rock-socket shaft friction on piles (after Pells and
Turner(4.60), courtesy of Research Journals, National Research Council, Canada).

1.0

D/B = 1

L/B L/B

R = 100

2

4

8

D/B = 1

R = 10

2

4

8

0.9

0.8

Reduction

factor

for

recessed

socket F

0.7

0.6

0.5

1.0

0.9

0.8

0.7

0.6

012345678 123456780.5

Q

FQlp Ed

BEd Ed

B

r = R = Ec

Ec

L

D

Gap

Figure 4.37Reduction factors for calculation of settlement of recessed sockets (after Pells and
Turner(4.60), courtesy of Research Journals, National Research Council, Canada).