Paper Title
A Numerical Study On The 3-Dimensional Characteristics Of Urban Small Cavities

Abstract
The special law on underground safety in Korea was enacted from January 1, 2018. When conducting the underground safety impact assessment under this Act, it is essential to investigate the occurrence and safety of underground cavities. When underground cavities were discovered, the safety of underground area around cavity was investigated through numerical analysis. In this study, the effects of small underground cavities considering 3D shapes were studied using a continuum analysis program and compared with the 2D results presented in previous study. Through this study, the relationship between the 3D shape characteristics of the urban small underground cavity and the safety factor calculated by the shear strength reduction method (SSR) is presented. The results of this study are expected to be basic data on underground safety impact assessment. Index Terms - Small Underground Cavity, Numerical Analysis, Ground Subsidence, Shear Strength Reduction Method (SSR)