Civil Engineering Reference
In-Depth Information
If the initial and final void ratios for the increment were 1.03 and 0.97 respectively,
determine a value for the coefficient of permeability of the soil.
Answer
k
=
2.71
×
10
−
6
mm/min
Exercise 12.5
A 2 m thick layer of clay, drained at its upper surface only, is subjected to a triangular
distribution of initial excess pore water pressure varying from 1000 kPa at the upper
surface to 0.0 at the base. The c
v
value of the clay is 1.8
×
10
−
3
m
2
/month. By divid-
ing the layer into 4 equal slices, determine, numerically, the degree of consolidation
after 4 years.
Note
:
If the total time is split into seven increments, r
=
0.049.
Answer
U
=
45%
