Question 1 A column is to transfer an axial compressive dead load, Qd of 700 kN. The foundation is also to be subjected to I a lateral design load of...
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Design an appropriate foundation for this soil layer. You may consider the use of surcharge and/or

wick drains toimprove the local soil if you so desireCapture d'écran 2019-12-11 à 04.41.45.png

Capture d’écran 2019-12-11 à 04.41.45.png

Question 1
A column is to transfer an axial compressive dead load,
Qd of 700 kN. The foundation is also to be subjected to
I
a lateral design load of 4.0 kN.
The local soil consist of an overconsolidated clay layer
of 13.64 m depth overlying bedrock. The clay layer
itself, illustrated in Figure 1, can be subdivided into
I
three sublayers whose properties are listed in the table
below.
Design an appropriate foundation for this soil layer. You
I
may consider the use of surcharge and/or wick drains to
improve the local soil if you so desire.
Figure 1: Local soil profile
Layer
H
e
Ydry
Y dsat
Ce
Cr
W
OCR
C'
Cu
(kN/m')
(kN/m')
(kPa)
(kPa)
3.33
2.55
7.6
14.6
4.180
0.032
92.7%
1.4
5.6
16.5
18.7
2
5.21
2.23
8.4
15.1
2.330
0.021
81.1%
1.4
10.7
25.8
40.4
5.1
1.91
9.3
15.7
2.200
0.026
69.5%
1.5
9.8
38.8
64.4

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