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A Study on Pillar Behavior of Twin Parallel Tunnels by Numerical Approach  

Byun, Yoseph (한양대학교 대학원 건설환경공학과)
Kim, Hyungi (한양대학교 대학원 건설환경공학과)
Lee, Sangsu ((주)특수건설, 공사팀)
Chun, Byungsik (한양대학교 공과대학 건설환경공학과)
Publication Information
Journal of the Korean GEO-environmental Society / v.11, no.8, 2010 , pp. 49-55 More about this Journal
Abstract
Safety estimation of the pillar between parallel tunnels are very important considering stress concentration in case the piller width is not enough to secure the stability. Pillar width needs to be determined properly because of the progressive failure-risk of pillar due to stress-concentration. In this research, the effect of element size in numerical analysis was evaluated based on that yield pillar's stability and proposed systematic analysis about pilar's stability examination. In consequence of it, element size does not give any effect on intensity stress ratio. On the other hand, the analysis using the smaller element size results in lower safety factor in strength reduction technique. In case of the weathered re.k on the main ground layer, the analysis of result was not reliable. In conclusion, the smaller element size is, the more stable factor is.
Keywords
Parallel tunnels; Strength reduction technique; Strength-stress ratio;
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Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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