Civil Engineering Reference
In-Depth Information
Figure 13.8
EXAMPLE 13.1
A semigravity retaining wall consisting of plain concrete (weight
145 lb/ft
3
) is shown in Figure
13.9. The bank of supported earth is assumed to weigh 110 lb/ft
3
, to have a
of 30
, and to have a
coefficient of friction against sliding on soil of 0.5. Determine the safety factors against overturning
and sliding and determine the bearing pressure underneath the toe of the footing. Use the Rankine
expression for calculating the horizontal pressures.
SOLUTION
Computing the Soil Pressure Coefficients
C
a
1
sin
1
sin
1
0.5
1
0.5
0.333
C
p
1
1
sin
sin
1
0.5
1
0.5
3.00
