Assessment of Liquefaction Susceptibility in Sedimentary Deposits on the Western Side of the Antalya Urban Area (Turkey)

摘要

Liquefaction, one of the major causes of damage during earthquakes, is a phenomenon in which saturated alluvial sediments lose their strength and stiffness. The objective of this study was to evaluate the sensitivity of alluvial sediment liquefaction on the western side of the urban area of Antalya. The region consists primarily of variable granulometric sedimentary deposits. The research was conducted in two phases of in situ and laboratory testing. Twenty boreholes were drilled at different locations in the first stage, and the standard penetration test (SPT) was carried out. In the second stage, laboratory tests were carried out to establish the physical properties of the soil. Liquefaction potential was studied using a simplified approach based on SPTs. Earthquake scenarios of magnitude Mw = 6.0, 7.0 and 7.4 were used in the calculations. PGA values of 0.28, 0.30 and 0.32 g were analysed. The analytical findings were measured as the liquefaction capacity of the high groundwater level and alluvial soil composition with the region's seismic characteristics. The findings indicate increased likelihood of liquefaction risk in areas with sedimentary deposits, shallow groundwater levels and relatively high ground motion, depending on the current seismic hazard.