Example Problem 7.1 A site consists of a sand deposit where the standard penetration test
Nvalue corrected for field testing procedures and overburden pressure [(N1
)
60
] is equal to 20.
The groundwater table is well below the bottom of the footing and the total unit weight g
t
of
the sand =120 pcf (18.9 kN/m
3
). For a square spread footing that is 10 ft (3 m) wide and at
a depth of 5 ft (1.5) below ground surface, determine the settlement if the footing exerts a ver-tical pressure of 6600 psf (320 kPa) onto the sand.