Identification of the behavior of the chlef sand to static liquefaction

An experimental study, realized in laboratory with the triaxial apparatus, proposes to evaluate the influence of the mode of soil deposition, initial density and confinement on the undrained behavior of the Chlef sand. The tests were conducted on specimens collected in situ of initial relative density of 29 and 80% (corresponding to depths of 10 m and 20 m, respectively), with initial confining pressure of 50, 100 and 200 kPa using two depositional methods that include dry funnel pluviation (DFP) and wet deposition (WD) with water content of 3%. All the samples were subjected to a monotonic loading after the consolidation phase. The test results show that the initial confining pressure and the relative density affect considerably the resistance to liquefaction. However, it increases with the confinement and the density. The results also show that the samples prepared with the dry funnel pluviation method have a greater resistance to liquefaction than those prepared with the wet deposition method, by mobilizing higher residual strength. © 2009 Académie des sciences.