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http://dx.doi.org/10.9711/KTAJ.2018.20.2.287

A numerical study on the characteristics of small underground cavities in the surrounding old water supply and sewer pipeline  

An, Joon-Sang (Construction IT Laboratory, BasisSoft, Inc.)
Kang, Kyung-Nam (Dept. of Civil Engineering, Inha University)
Song, Ki-Il (Dept. of Civil Engineering, Inha University)
Kim, Byung-Chan (Construction IT Laboratory, BasisSoft, Inc.)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.20, no.2, 2018 , pp. 287-303 More about this Journal
Abstract
In recent years, the occurrence of ground subsidence phenomenon is frequent in Korea. The Korean government has enacted a special law on underground safety and the law will be enforced from January 1, 2018. Under this new 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, it is controversial because the method of numerical modeling the discovered underground cavity is due to be 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 shape of the underground cavity to the numerical modeling is presented. The relationship between the 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 form the basic data on underground safety impact assessment.
Keywords
Underground cavity; Aspect ratio; Numerical analysis; Ground subsidence; Shear strength reduction method (SSR);
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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