Abstract:
In this research change in undrained shear strength 5u
due to swelling under ko and isotropic stress conditions is
investigated for remoulded Dhaka clay, collect~dfrom BUET
campus. The remoulded samples were prepared from slurry having
a water content twice the liquid limit inorder to attain
a uniform density. The ko samples were consolidated in a large
oedometer and then subjected to undrained triaxial shear
strength test. The isotropically consolidated samples were
consolidated to a small ko stress condition prior . to isotropic
consolidation and then subsequently subjected to undrained triaxial
shear •.
The results indicate that the relationship between the
ratio 5}u6 va., where ava. is t.he vertical effective stress at'
. I
the end of swelling, and the overconsolidation ratio n is
represented by a straight line in logarithmic plot, both for
ko conso;idated and for isotrdpically consolidated samples.
The uridrained shear strength of naturally occuring Dhaka clay
is predicted using the log linear relation between 5,u/6 vo
obtained e~perimentally from Dhaka clay. Some amount of
agreement is observed between predicted and measured shear
strength although unoertainties remain' due to soil variability
and sampling factors. Further more coefficient of earth
pressure ko is determined for both normally loaded and overconsolidated
condi tions.
