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The Effect of Seepage Forces on the Ground Reaction Curve of Tunnel  

Lee Seok-Won (Dept. of Civil and Envi. System Engrg., Konkuk Univ.)
Jung Jong-Won (Dept. of Civil and Environmental Engrg., Korea Univ.)
Nam Seok-Woo (Purdue University)
Lee In-Mo (Dept. of Civil and Environmental Engrg., Korea Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.21, no.3, 2005 , pp. 87-98 More about this Journal
Abstract
When a tunnel is excavated below groundwater table, the groundwater flows into the excavated wall of tunnel and seepage forces are acting on the tunnel wall. The ground reaction curve is defined as the relationship between internal pressure and radial displacement of tunnel wall. Therefore, the ground reaction curve is significantly affected by seepage forces. In this study, the theoretical solutions of ground reaction curves were derived for both the dry condition and the seepage forces. The theoretical solutions derived were validated by numerical analysis. The ground reaction curves with the support characteristic curve were also analyzed in various conditions of groundwater table. Finally, the theoretical solutions of the ground reaction curve derived in this study can be utilized easily to determine the appropriate time of support systems, the stiffness of support system and so forth for the reasonable design.
Keywords
Convergence-confinement; Ground reaction curve; Internal pressure; Seepage forces;
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  • Reference
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