Paper Title
A Numerical Study on the Shape Characteristics of Circular Underground Cavity
Abstract
In recent years, ground subsidence phenomenon frequently occurs in the world. The Korean government has
enacted a special law on underground safety and the law will be enforced from January 1, 2018. Under this law, underground
excavation should be assessed for underground safety impacts. After excavation construction, periodic geophysical surveys
should be conducted to investigate the occurrence of underground cavities. When underground cavities were discovered, the
underground safety was assessed through numerical analysis. However, there is controversy because the method of
numerically modeling the discovered underground cavity has not been established. In this study, the effect of the depth of the
underground cavity from the shape of the underground cavity to the underground cavity was studied using a continuum
analysis program. In this study, a method to reflect the circular shape underground cavity to the numerical modeling is
presented. The relationship between circular shape and depth of the underground cavity and the factor of safety 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 - Underground Cavity, Numerical Analysis, Ground Subsidence, Shear Strength Reduction Method (SSR)