For the last several years, climatic changes have led to the increase of natural disaster attributed to climatic abnormality, for instance, sweltering heat, heavy snow, or heavy rain. Particularly, localized guerrilla heavy rain mostly occurring in summer often results in flood damage. Such damage may lead to fatal damage to the safety of underground structures having the water level as the load. Accordingly, this study is going to introduce the cases of safety analysis grounded on numerical analysis in order to understand the structural behavior of riverbed tunnels according to water level fluctuations.

Abstract
 1. 서 론
 2. 대상터널 현황
 3. 해석모델링
 3. 해석결과
 4. 결 론
 참고문헌

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