Comparative assessment of liquefaction susceptibility of unconsolidated deposits
Comparative assessment of liquefaction susceptibility of unconsolidated deposits
Liquefaction may be considered one of the most dangerous physical-geological processes associated with the seismic hazard that affects almost all granular deposits as the fine ones, of low plasticity. The triggering mechanism depends on many factors that vary in space and time and may be clustered into three classes: two related to the soil properties (general settings of soil layers and geomechanical features) and one defined by earthquake characteristics. In this frame, determining the cyclic resistance of soils through in situ tests becomes an important and sensitive issue in assessing liquefaction susceptibility. This paper presents the evaluation of this seismic characteristic through several semiempirical correlations based on the most important in situ test: the Standard Penetration Test, executed on one of the most vulnerable structures which are the Holocene sedimentary alluvial deposits encountered all over the world in the proximity of every river or stream.