Pile Design and Construction Practice, Fifth edition

(6.48b)

(6.48c)

(6.48d)

(6.48e)

To draw the pile load/deflection curve, the deflections corresponding to soil reactions equal
to the creep pressure, pf, and the limit pressure, pl, are calculated from the relationship
pkmy. The lateral pile loads then follow from equations 6.45a, 6.46, 6.48a or 6.48d. For
soil reactions between the limit pressure and creep pressure the value of kmis halved as
shown in Figure 6.34. The procedure is illustrated in Worked Example 6.8 where the pres-
suremeter tests show a linearly increasing soil modulus. The values of nhcan be calculated
from equation 6.13 taking Kas kmB. Deflections are calculated from the Matlock and Reese
curves (Figures 6.26 to 6.28).

Mt HR

2

y 0 H

RkmB

T(z) H·F 3

M(z) HR

2

F 4

Piles to resist uplift and lateral loading 349

Values of F

0

0

1.0

2.0

Z

x/R

3.0

4.0

5.0

0.5

F 3 F^4

F 1

F 2

1.0

Figure 6.35Values of the coefficients F 1 to F 4 (after Baguelin et al.(6.22)).