A Short Review on Characteristics of Kolkata Soil on The Basis of Liquefaction Susceptibility

The present study describes liquefaction of soil due to loss of strength of cohesionless soils in saturated condition due to sudden increase of pore water pressure during earthquake in undrained condition. Many failures of various structures such as seismic dams, retaining structures, and harbours have been attributed to liquefaction of saturated soils. There have been very limited studies regarding the behaviour of soil liquefaction at large depths, yet this situation commonly occurs at foundations of some structures such as large earth dams. This paper describes effects, mechanism, susceptibility, evaluation and prevention of liquefaction and it concludes by proposing that dynamic consolidation is the best suitable method of soil improvement which can be adopted before constructing any structures in Kolkata in those places are highly prone to liquefaction.