Civil Engineering Reference
In-Depth Information
earth approximately equal to the building weight. If this is done, the net soil pressure
after the building is constructed will theoretically equal what it was before the exca-
vation was made. Thus the building will
float
on the raft foundation.
5.
Pile caps
[Figure 12.1(e)] are slabs of reinforced concrete used to distribute col-
umn loads to groups of piles.
12.3
ACTUAL SOIL PRESSURES
The soil pressure at the surface of contact between a footing and the soil is assumed to be
uniformly distributed as long as the load above is applied at the center of gravity of the
footing [Figure 12.2(a)]. This assumption is made even though many tests have shown
Figure 12.2
Soil conditions.
