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Numerical Analysis on the Effect of Fractured Zone on the Displacement Behavior of Tunnel  

Kim Chang-Yong (한국건설기술연구원 지반연구부)
Kim Kwang-Yeom (한국건설기술연구원 국토지반연구부)
Moon Hyun-Koo (한양대학교 지구환경시스템공학과)
Lee Seung-Do (삼성건설 토목사업본부 토목기술팀)
Baek Seung-Han (한양대학교 산업과학연구소)
Publication Information
Tunnel and Underground Space / v.16, no.3, 2006 , pp. 218-231 More about this Journal
Abstract
Anisotropic/heterogeneous rock mass shows various deformation behavior types due to tunnelling because deformation behavior is largely controlled by the spacial characteristics of geological factors such as faults, joints and fractured zone in rock mass. In this paper 2-dimensional numerical analysis on the several influencing factors is performed considering fractured zone located near tunnel. This numerical analysis shows that deformation behavior of tunnel are very different according to the width and the location of fractured zone and supper method. However, 3-dimensional analysis is necessary to consider 3-dimensional geometrical characteristics sufficiently since discontinuity and fractured zone have 3-dimensional geometry. Also flexible design/construction guidelines for tunnelling are required to cope with uncertain ground condition and circumstance for technically safe and economic tunnel construction.
Keywords
Fractured zone; Tunnel displacement; Support design; Heterogeneity;
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