Geotechnical and Foundation Engineering: Design and Construction

Chapter 8: Bearing Capacity

OVERVIEW

The following notation is used in this chapter:

SYMBOL

DEFINITION

B

Width of the footing (Sec. 8.2)

B

Width of the pile (Sec. 8.3)

c

Cohesion based on a total stress analysis

c ?

Cohesion based on an effective stress analysis

c A

Adhesion between the cohesive soil and the pile or pier perimeter

D

Depth of the pile group

D

Depth below ground surface to the bottom of the footing

e

Eccentricity of the vertical load Q

F

Factor of safety

G

Gravel equivalent factor

h ?

Depth of the groundwater table below ground surface [Eq. (8.4)]

k

Ratio of ? ? h divided by ? ? ?

L

Length of the footing

N c, N ?, N q

Dimensionless bearing capacity factors (Table 8.2)

q all

Allowable bearing pressure

q ult

Ultimate bearing capacity

q ?

Largest bearing pressure exerted by an eccentrically loaded footing

q ?

Lowest bearing pressure exerted by an eccentrically loaded footing

Q

Applied load to the footing

Q all

Maximum allowable footing, pile, or pier load

Q p

Ultimate pile or pier tip resistance force

Q s

Ultimate skin friction resistance force for the pile or pier

Q ult

Load causing a bearing capacity failure (Sec. 8.2)

Q ult

Ultimate load capacity of a pile or pier (Sec. 8.3)

r, R

Radius...

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