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Ground Response Curve for Ground Movement Analysis of Tunnel  

Lee, Song (서울시립대학교 토목공학과)
Ahn, Sung-Hak (서울시립대학교 토목공학과)
Ahn, Tae-Hun (서울시립대학교 토목공학과)
Kong, Sung-Suk (서울시 시설계획과)
Publication Information
Journal of the Korean Society for Railway / v.5, no.4, 2002 , pp. 244-252 More about this Journal
Abstract
We must notice ground movement by excavation for reasonable tunnel designs. The convergence confinement method is an attempt to evaluate tunnel stability conditions by means of a mathematical model and a ground response curve. In this study, the convergence confinement method by numerical model was examined. This method don't need the basic assumptions for a mathematical model of circular tunnel shape, and hydrostatic in situ stress. Also modified ground response curve that is calculated after installing the support, is suggested, which informs us the ground movement mechanism. The ground response curve and the support reaction curve are mutually dependent. Especially the support reaction curve depends upon the ground response curve. The mechanism of tunnel must be analyzed by the interaction between support and ground. Consequently the stability of tunnel must be qualitatively investigated by a ground response curve and quantitatively adjudged by a numerical analysis for the reasonable design of tunnel.
Keywords
Ground Response Curve; Confinement Convergence Method; Support Reaction Curve; Load Distribution Ratio;
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