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Analysis of Mechanical Behavior of Existing Tunnel by the Construction of Shaft Nearby  

이석원 (한국건설기술연구원 지반연구부)
조만섭 ((주)유니벡 제1사업본부 터널팀)
이성원 (한국건설기술연구원 지반연구부)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.5, 2003 , pp. 109-122 More about this Journal
Abstract
In order to release the pressure fluctuations and micro-pressure wave induced by the entering of train into the small cross sectional tunnel, it has been reported that the construction of air shaft has more advantages with respect to economy and constructability than the enlargement of cross section of existing tunnel. The field monitorings and analytical studies were conducted simultaneously in this study to analyze the mechanical behavior of existing railway tunnel, new cross tunnel and new shaft by the construction of new shaft nearby. The results showed that the minimum distance from existing tunnel to new shaft which secures the stability of existing tunnel was found to be half diameter of existing tunnel. On the three dimensional mechanical behavior of existing tunnel by the construction of new shaft, the results from the analytical study and field monitoring had a similar trend. The analytical study and field monitoring results, however, produced somewhat different results on the mechanical behavior of new shaft itself. These conclusions induce that the analytical method which has been applied on the analyses of horizontal tunnel could not be applied in the same way on the analysis of vertical shaft.
Keywords
Concrete lining; Railway tunnel; Shaft; TPMS;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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