Pile Design and Construction Practice, Fifth edition

Influence factor, l p
2.0
1.6
1.2
0.8
0.4
0.20
0.16
50
100
200
0.12
0 1 2 3 4
L/B
5 6 7 8 9
0.4
R =2
1.0
10
20
E d
E c
B
Q
Ec R=
Ed Qlp r =
BEd Figure 4.36 Elastic settlement influence factors for rock-socket shaft friction on piles (after Pells and
Turner (4.60) , courtesy of Research Journals, National Research Council, Canada).
Reduction
factor
for
recessed
socket F
1.0
0.9
0.8
0.7
0.6
D/B = 1
2
4
8
R = 100
L/B L/B
D/B = 1
2
4
8
R = 10
0.5
0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
r =
FQlp BEd R =
Ec Ed Ed Ec Gap
B
Figure 4.37 Reduction factors for calculation of settlement of recessed sockets (after Pells and
Turner (4.60) , courtesy of Research Journals, National Research Council, Canada).
Q
L
Gap
1.0
0.9
0.8
0.7
0.6
0.5
D
L