Pile Design and Construction Practice, Fifth edition

From equation 6.33, mm

x (m) ym yA 32.4ym yh yB 4.7yh yAyB y
(mm) (mm) (mm) (mm)

00 1.0 32.4 1.40 6.6 39.0
0.5 0.13 0.78 25.3 1.32 6.2 31.5
1.0 0.26 0.63 20.4 1.15 5.4 25.8
1.5 0.40 0.50 16.2 1.00 4.7 20.9
2.0 0.53 0.40 13.0 0.90 4.2 17.2
2.5 0.66 0.32 10.4 0.80 3.8 14.2

The above values of yare referred to the p–ycurves to obtain the corresponding values of p
and hence to obtain Esfrom the linear relationship Esp/y, as tabulated below.

x (m) y (mm) p (kN/m) pp/1.3 (kN/m^2 ) (kN/m^2 /m)

0 39.0 320 246 6.3
0.5 31.5 310 238 7.6
1.0 25.8 295 227 8.8
1.5 20.9 290 223 10.7
2.0 17.2 285 219 12.7
2.5 14.2 280 215 15.1

The values of Esare plotted against depth in Figure 8.19b, from which an average constant
value of Esof kN/m^2 /m is obtained. From equation 6.11:

This value of R(obtained) is plotted against R(tried) in Figure 8.19c, from which a second
trial value of Rof 6.5 is taken. This higher value requires a deeper penetration of the pile, i.e.
L3.56.5 22.75; say 23 m. Thus , and from equation 6.31:

From equation 6.33:

yB 0.4216.5

(^3) 1 000
2  105 0.024
yh 24.1yh mm
yA 10.96.5
(^2) 1 000
2  105 0.024
ym 95.9ym mm
Zmax (^23) 6.5 3.5
R (obtained) (^) ^42 ^10
(^5) 0.024
8

4.9

8  103

Esp/y

Z x

R

yB 0.4213.78

(^3) 1 000
2  105 0.024
yh 4.7yh
428 Piling for marine structures