The following table gives the variation of the field standard penetration number sN60d in a sand deposit:
|
Depth (m)
|
N60
|
|
1.5
|
5
|
|
3.0
|
11
|
|
4.5
|
14
|
|
6.0
|
18
|
|
7.5
|
16
|
|
9.0
|
21
|
The groundwater table is located at a depth of 12 m. The dry unit weight of sand from 0 to a depth of 12 m is 17.6 kN/m3. Assume that the mean grain size (D50) of the sand deposit to be about 0.8 mm. Estimate the variation of the relative density with depth for sand. Use Eq. (3.23).