TAGRA 2025

The aim of this thesis is to assess the liquefaction potential of the Aziziye District of Erzurum Province and to determine the region's seismic safety in terms of soil properties. In this context, the aim was to calculate the liquefaction potential of the study area using the methods recommended by Iwasaki et al. (1982) and Sönmez and Gökçeoğlu (2005). As part of the field studies, boreholes were drilled at designated locations and the Standard Penetration Test (SPT) was applied. Additionally, laboratory consistency limits, natural and saturated unit weight, sieve analysis, and hydrometer tests were conducted on disturbed and undisturbed soil samples taken from the research pits. Using all data obtained from the field and laboratory tests, liquefaction potential analyses were conducted according to the criteria of Iwasaki et al. (1982) and Sönmez and Gökçeoğlu (2005). As a result of the evaluation of the data obtained in the study; The average SPT-N value was determined to be 25.36, the natural unit weight was 16.20 kN/m³, and the saturated unit weight was 17.45 kN/m³. Furthermore, the plasticity index was determined to be 13.8%, the clay content was 11.12%, and the fines ratio was 32.34%. In liquefaction analyses conducted using these soil properties, the liquefaction potential at different points in the study area was calculated according to the methods of Iwasaki et al. (1982) and Sönmez and Gökçeoğlu (2005). According to the results obtained from field and laboratory studies, the probability of liquefaction occurring at drilling locations SK-1, SK-4, and SK-7 in the study area was determined to be high, while the liquefaction potential at locations SK-2, SK-3, SK-5, and SK-6 was determined to be very low.