Effect of Compaction States and the Confining Pressure on Poisson's Ratio of Stratified and Non-Stratified Soils

Poisson's ratio is an important engineering property of soils giving information about its stress and deformation behaviour. Many of the researchers have conducted experimental investigation to determine the Poisson's ratio of soils in laboratory. Some of these researchers have then tried to correlate the effect of moisture content, density and confining pressure on Poisson's ratio. However, the results available in the literature are very limited to reach at any conclusion and are mainly applicable for coarse-grained soils. Moreover, Poisson's ratio that is determined in laboratory by methods other than acoustical method shows diversified results, and hence, it appeals more research in this area. Also, experimental results on Poisson's ratio of stratified soils have been rarely reported by the researchers. Keeping this in view, an attempt has been made to determine the Poisson's ratio in single-, double- and triple-layered soils by measuring the shear and compression wave velocities using bender/extender element at different confining pressure. The effects of moisture content, soil density and confining pressure on Poisson's ratio of stratified and non-stratified soil samples have been presented in this paper.