Liquefaction Potential Analysis in Terboyo Industrial Park

Abstract

Terboyo industrial park is one of the most important industrial areas in Semarang City. It is located on the north sea coast of Java, where in fact the land is alluvial soil. The characteristic of alluvial soil which is loose and tends to store much water can cause liquefaction phenomena when it is hit by an earthquake. Moreover, Semarang city is passed by an active fault along 34 km which has the potential to cause an earthquake measuring 6.5 magnitudes. Liquefaction is one geotechnical phenomena that occur due to cyclic loads. It causes the soil to lose its carrying capacity and function like a liquid, so it is very dangerous for the infrastructure above it. The research objective to analyze the possibility of liquefaction in Terboyo industrial park. This research method was begun with collect secondary data in the form of soil data and earthquake data. After collecting data, then the data was processed and analyzed using semi-empirical methods. The data processing produces cyclic stress ratio (CSR) and cyclic resistance ratio (CRR) values which were analyzed for safety factor (SF) as a parameter for the level of liquefaction potential. Then, know the level of liquefaction potential from the Liquefaction Potential Index (LPI) method is the following procedure. Based on the results of the liquefaction potential analysis, the soil in Terboyo Industrial Park is very vulnerable to liquefaction hazards because the LPI value is 23.57.