Civil Engineering Reference
In-Depth Information
Determine the MCV for the soil.
Solution:
The calculations are best tabulated:
No. of
blows, B
Penetration
(mm)
Change in penetration with
additional 3B blows (mm)
1
45.6
21.5
2
55.3
24.2
3
62.7
23.4
4
67.1
23.6
6
74.5
22.1
8
79.5
19.9
12
86.1
15.8
16
90.7
12.2
24
96.6
6.9
32
99.4
4.4
48
101.9
64
102.9
96
103.5
128
103.8
The plot of change in penetration to number of blows is shown in Fig.
14.14.
The plot
crosses the line at B
=
30.2. Hence the MCV of the soil is 10
×
log
10
30.2
=
14.8. The
value of MCV can be read directly on the bottom scale.
Fig. 14.14
Example
14.5.
