Akademik Veri Yönetim Sistemi
ISSMGE TC101 - International Workshop on Advances in Laboratory Testing of Liquefiable Soils, Girne, Kıbrıs (Kktc), 17 Eylül 2022, ss.77, (Tam Metin Bildiri)
Liquefaction of saturated sand containing plastic fines may be triggered owing to the propagation of seismic waves or by monotonically increasing loads. In such circumstances, excess pore-water pressure development results in loss of confinement in soil strata and a decrease in intergranular force transfer, leading to strain-softening behaviour under shear. This study assesses the effect of plastic fines on the liquefaction susceptibility of carbonate sand from Famagusta Bay, Cyprus. The study simulates the diverse composition of Famagusta Bay sand by incorporating varying proportions of silt and clay to form reconstituted specimens. Consolidated undrained triaxial compression tests were conducted to analyse the behaviour of fines effect on stability/instability, compressibility, location of isotopically consolidated/critical state lines and soil fabric at low-stress levels with varying relative densities of 35% and 70%. The varying percentages of silt and clay fractions (10, 20 and 30%) were added to Famagusta Bay sand to form a set of mixed soils. The findings indicated that sand and clayey-silty sand (10%) specimens prepared in a loose state (relative density of 35%) exhibited susceptibility for flow liquefaction whereas diverse behaviour was observed for other soil groups in terms of state parameter values. In addition, factors affecting state parameter evaluation due to the presence of plastic fines along with a modified state parameter empirical relationship for sand containing plastic fines is also discussed.