Cone Penetration Test-based Analysis for Shallow Liquefaction Potential Evaluation Due to Maximum Credible Earthquakes of Cimandiri Fault in Sukabumi, West Java, Indonesia

Abstract

The West Java region in Indonesia is prone to seismic activity due to its location near several tectonic plate boundaries. Every year a significant earthquake occurred in West Java, resulting in widespread damage and loss of life, one of which resulted from active fault activity, namely the Cimandiri fault. One of the primary hazards associated with seismic events is soil liquefaction, which can occur during seismic events. This research journal presents a detailed investigation into the shallow liquefaction potential evaluation in the affected region using the Cone Penetration Test. The investigation involved extensive fieldwork, including CPT measurements and soil sampling at various locations within the research area. The CPT data were utilized to determine the soil properties and estimate the liquefaction potential using established empirical correlations. The results of the analysis revealed significant variations in the liquefaction potential across the research area. The liquefaction values indicate low to high vulnerability to liquefaction considering the Liquefaction Potential Index (LPI). During an earthquake, vertical settlement values are estimated from 20 mm to 60 mm. Furthermore, horizontal displacement values are 10-70 cm. The findings from this study contribute to the understanding of shallow liquefaction potential in Sukabumi, West Java, Indonesia. The CPT-based analysis provides a reliable and efficient method for assessing liquefaction susceptibility, offering valuable information for urban planning, infrastructure design, and seismic hazard mitigation strategies.