SPT Based Soil Liquefaction Susceptibility Assessment: A Review

Development projects in the low land areas are frequently carried out in Bangladesh after filled lands. Bangladesh lies in the seismic active zone. Therefore, during the earthquake, severe shaking or liquefaction of the ground may be experienced in these areas due to the presence of thick loose sand bed. When the loose sand is saturated and under moderate to high shear stresses, such as beneath a foundation or sloping ground, large shear deformations or even flow failure may take place due to the loss of shear strength accompanied by the softening. This paper presents the results of a study carried out to examine the variation of different variable parameters in the cyclic stress-based method while evaluating the liquefaction potential. The risk of liquefaction in Bangladesh and the issues that are needed to be addressed in evaluation in liquefaction evaluation are also discussed. The output of the study will enable the practicing engineer to assess liquefaction susceptibility of the construction site from the borehole data

Keywords:

liquefaction , SPT , cyclic stress ratio , cyclic resistance ratio