92 Ground improvement by deep vibratory methods
3.6.4 Foundation of a fuel oil tank farm
For the extension of a large power and desalination plant in the Middle
East, 16  fuel oil storage tanks were to be constructed in 2008. The soil
conditions at the site typically consist of an approximately 10 m thick layer
of sand which rests on relatively incompressible bedrock made up of silt
and limestone. The sand deposit consists of calcareous material of loose to
medium density, generally clean to slightly silty, in places also gravelly, but
Depth (m)
q c (MPa)
16
0
2
4
6
8
10
12
14
Target line
4.7 m grid
4.5 m grid
4.2 m grid
0
5
10
15
20
30
25
Figure 3.42 Comparison of average post-CPT results for different grid patterns with
target curve.
Figure 3.43 Impact roller in operation. (Courtesy of Keller Group plc, London, UK.)