Yuli Fajarwati, Nur Alfian Sasmayaputra, Dian Eksana Wibowo, Endaryanta
Liquefaction poses a significant threat to infrastructure in seismically active regions such as Indonesia, particularly in areas with varying soil conditions, like the Makassar-Parepare railway line in South Sulawesi. This study assesses the liquefaction potential at five specific locations along the railway and proposes appropriate ground improvement techniques to mitigate the risks. The method used to analyze liquefaction potential at locations S-1, S-2, S-3, S-4, and S-5 was the Robertson and Wride method. The cyclic stress ratio (CSR) and liquefaction potential index (LPI) were calculated based on CPT data and site-specific seismic parameters. A reinforcement analysis was performed using GeoSlope software, incorporating stabilization techniques such as a 3-meter-high fill, 0.6-meter soil replacement with a geotextile "mattress", and 6-meter dolken piles. The analysis identified liquefaction potential at depths of 2.2 to 11 meters, with significant risks found at S-2, S-4, and S-5, where LPI values exceeded 15, indicating very high susceptibility to liquefaction. The reinforcement analysis confirmed that the proposed stabilization methods were effective in ensuring long-term embankment stability. The factors of safety (SF) for both static and dynamic conditions exceeded the minimum safety thresholds, with SF static at 4.65 and SF dynamic at 3.645, surpassing the required values of 1.5 and 1.1, respectively. © 2025 Institute of Physics Publishing. All rights reserved.
Department of Civil Engineering and Planning, Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
