Analysis and mapping of liquefaction in Seferihisar (İzmir) province

This study covers the investigation of the liquefaction potential of Seferihisar (İzmir) district alluvial soil deposits under possible earthquakes according to Turkey Building Earthquake regulation (TBDY 2018) by using in-situ Standard Penetration Test (SPT) results. Seferihisar Yelki fault zone which is one of the branches of the Western Anatolian Fault Line lies under the study area. This situation poses a risk in a possible earthquake. In order to evaluate this risk, soil survey reports belonging to the buildings licensed by Seferihisar Municipality in Sığacık district which were located by seaside and had possibly high ground water levels, were obtained and investigated. In this context, initially the liquefaction risk analysis method given in TBDY 2018 was briefly introduced and a sample solution was presented in detail. Afterwards, data from 18 drilling points in Sığacık neighborhood were evaluated and liquefaction risks were calculated according to TBDY 2018 and presented on the map and possible postliquefaction settlements were also calculated.