Mechanical instability of saturated sandy soils under seismic effect of Boumerdes 2003-Algeria earthquake

In geotechnical studies, liquefaction is an important phenomenon of mechanical instability. This mechanism has been constantly modified to include new parameters that can control the mechanical instability under vibratory stresses to avoid catastrophic failure of the soil (such instability can manifest itself in serious damage with large displacements). In this work, the objective is to follow the vertical displacement of an intruder on a saturated sandy soil and the variation of the relative density after test. It is possible to demonstrate an alternative liquefaction mechanism by using two reduced models without and with inclusions and geotextile as reinforcement: the vibratory accelerations are under BOUMERDES2003 model earthquakes with reduction of their intensity to 10-3, variation of this intensity between 5.10-4 and 3.10-3 and the variation of the degrees of saturation from 50% to 100%. The sample is subjected to a seismic shock was shown that different behavior has a direct effect on the vertical displacement of the intruder, it was concluded that the imposed seismic acceleration and the relative density of the soil determine the vertical displacement of the intruder into the sample. Finally, it's important to develop that the vertical displacement of the intruder and the final relative density have a direct relation with this phenomenon.