Abstract This study investigates the seismic liquefaction potential of the Bazoul strategic grain silo site located in Taher, Jijel, northeastern Algeria, where critical infrastructure is planned on a coastal sandy deposit. The assessment was based on an integrated workflow combining grain-size susceptibility screening, Standard Penetration Test (SPT)-based triggering analysis, Cone Penetration Test (CPT)-based evaluation, and Liquefaction Potential Index (LPI) interpretation. The site investigation program included cored and pressuremeter boreholes, SPT and CPT soundings, piezometric observations, laboratory testing, and complementary geophysical surveys. The subsurface is dominated by a recent coastal-alluvial sandy formation extending to about 20 25 m depth and overlying coarser alluvial materials. Grain-size distribution curves indicate that the sandy deposit falls within the range commonly associated with potentially liquefiable soils. SPT-based results show that the most critical interval is concentrated in the upper 0–10 m, where the factor of safety against liquefaction is frequently lower than the adopted threshold of 1.25, whereas resistance generally improves with depth. CPT/LPI interpretation confirms this pattern and further indicates that the highest liquefaction severity is concentrated mainly within the first 4–6 m, particularly at CPT 02 and CPT 03, while deeper horizons show low to negligible manifestation potential in most sectors. The combined interpretation reveals that liquefaction susceptibility at Bazoul is governed primarily by the shallow sandy horizons and exhibits significant lateral variability across the site. These findings provide a transparent and practice oriented basis for geotechnical design and highlight the need to explicitly account for shallow liquefaction-prone layers in the foundation strategy of the projected silo structures.
Abderraouf et al. (Fri,) studied this question.