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An Investigation of Tunnel Behaviour Using a Time-based 2-D Modelling Method  

Shin, Jong-Ho (Information Planning Bureau, Seoul Metropolitan Government)
Publication Information
Journal of the Korean Geotechnical Society / v.18, no.1, 2002 , pp. 17-28 More about this Journal
Abstract
Tunnel construction is a complex three dimensional operation. Since, however, it is neither possible nor useful to simulate all conditions and parameters in detail, a simplified two dimensional model is commonly employed in practice. The simulation of three dimensional conditions by a two dimensional model should use empirical parameters. The numerical predictions indicate that analysis results are highly dependent on the parameters. An improved modelling method based on time was adopted to account for three dimensional effect at the tunnel heading and time dependent nature, and used to perform an analysis of tunnelling in decomposed granite. The effects of weathering degree, tunnel shape and multi-drift excavation were investigated by using the method. It is identified that a structural benefit can be obtained by adopting a horse-shoe-shaped cross section with multi-drift excavation in mixed-force ground condition.
Keywords
FEM; Mixed-force tunnel; Time-based 2-D modeling;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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