Correlation Between Standard Penetration Test (Spt) and Liqit Software: An Analytical Study

Abstract The Standard Penetration Test (SPT) is a widely recognized method in geotechnical engineering for evaluating soil properties and estimating liquefaction potential. This test provides essential data that inform the design and construction of foundations in seismic regions. However, with advancements in computational tools, software such as LiqIT has emerged, offering enhanced analytical capabilities for predicting soil behavior under seismic conditions. This study aims to explore the correlation between SPT results and the outputs generated by LiqIT software to assess the consistency and reliability of these methods in liquefaction potential evaluation. A comprehensive analysis was conducted using SPT data from various sites prone to liquefaction, which were then compared with the liquefaction potential predictions by LiqIT. The study examines the relationship between SPT blow counts (N-values) and the factor of safety against liquefaction as calculated by LiqIT. By establishing a correlation, this research seeks to enhance the understanding of the integration of traditional field tests with modern computational tools in geotechnical practice. The findings reveal that while SPT remains a valuable field test, integrating its results with LiqIT software offers a more detailed understanding of liquefaction risks. The study's results are expected to contribute to the development of more reliable and efficient methods for assessing liquefaction potential in seismic regions, building upon the foundations laid by previous studies (Seed & Idriss, 1971; Idriss & Boulanger, 2006; Skempton, 1986).