Construction of Digital Twin Geotechnical Resistance Model for Liquefaction Risk Evaluation

Abstract

In Korea, a strong earthquake of 5.8 and 5.4 magnitude occurred in Gyeongju in September 2016 and Pohang in November 2018 respectively. In the case of the Pohang Earthquake, the ground is losing its resistance and the ground liquefaction phenomenon that is behaving like a liquid is officially reported. In Korea, the importance of liquefaction evaluation is increasing due to lack of damage prediction system by liquefaction and ground amplification when an earthquake occurs. In this study, drilling information was extracted from the 5-1 region of Sejong City, a smart city demonstration area, and ground resistance was calculated to construct a ground resistance model for liquefaction risk assessment. And three - dimensional ground resistance modeling was made by applying GIS analysis technique. Based on this, a digital twin model replicating the same real world environment was constructed to simulate soil resistance. As a result of this study, it was confirmed that the ground resistance result calculated from simulation test was similar to the actual resistance result. It is considered that this can be used for examining the ground supporting force and estimating the ground resistance when an earthquake occurs.