Analysis of Potential Liquifaction Risk Using the Simple Procedure Method Based on Standard Penetration Test (SPT) Data

Abstract

The direct result of an earthquake can be in the form of damage to the soil structure by reducing the carrying capacity of the soil resulting in a decrease in the shear strength of the soil due to an increase in pore water and a reduction in the effective stress (liquefaction). The source of the earthquake around the Medan Tuntungan sub-district is predicted to originate from a fault that has not been identified properly but earthquakes have been recorded and the cause of an active or inactive fault is unknown. The aim of this research is to determine the liquefaction potential index regionally using a simple procedure method. The research was conducted in the Medan Tuntungan sub-district. The results showed that the potential for liquefaction is high to very high. The high liquefaction potential index values are 5.95 to 14.72 and the very high liquefaction potential index values are 16.59 to 17.60.