Pile Design and Construction Practice, Fifth edition

Deflection coefficient Ay Moment coefficient Am

Soil resistance coefficient Ap

Depth coefficient

Z

Depth coefficient

Z

Depth coefficient

Z

Depth coefficient

Z

• 2.0

(a) (c)

(b) (d)

(e)

0

1.0

2.0

3.0

4.0

5.0

5.0

4.0

3.0

2.0

1.0

0

5.0

4.0

3.0

2.0

1.0

0

Depth coefficient

Z

5.0

4.0

3.0

2.0

1.0

0

• 3.5 –3.0 –2.5 –2.0

Slope coefficient As Shear coefficient Av

• 1.5 –1.0

5 &10

5 &10

5 &10

3

4

5 5

4

3

2

3

10

10

• 0.5 –0.8


• 3.0 –2.0 –1.0 +1.0 +2.0

= 4

0

• 0.4 +0.4 +0.8 +1.200

5 & 10

4

3

Z (^) max
2
Z (^) max
2 Z^ max
^2
Z (^) max
2
3
4
(^105)
Z (^) max
2
H
x
YA
H
x
SA
H
x
VA
H
x
PA

• 1.0 +1.0 +2.0 +3.0 +4.0 +5.00 0 – 0.2 0 +0.2 +0.4 +0.6 +0.8

1.0

2.0

3.0

4.0^5

4 5 & 10

3

10

x

H MA

5.0

Figure 6.26Coeffcients for laterally loaded free-headed piles in soil with linearly increasing modulus
(after Reese and Matlock(6.14)) (a) Coefficients for deflection (b) Coefficients for slope
(c) Coefficients for bending moment (d) Coefficients for shearing force (e) Coefficients
for soil resistance.