Civil Engineering Reference
In-Depth Information
Fig. 11.12
Example
11.7.
Immediate settlement
Sand: test value for N
=
20:
′
=
p
4 57 19 2 1 52 9 81
.
×
.
−
.
×
.
=
73
kPa
o
C
r
=
400 20
× =
8000
kPa
1 5 8000
73
.
×
C
s
=
=
165
6 1
165
.
73
+
317
73
ρ
i
=
ln
=
0 062
.
=
62
mm
(As the SPT was carried out on submerged soil there is no need to increase this value
to allow for groundwater effects.)
Hence
ρ
i
in the sand
=
62 mm.
