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터널 콘크리트 라이닝 및 공동구 신축이음 설치방안에 관한 연구
손무락,박양흠,박윤재,김재견,윤종철 한국지반공학회 2015 한국지반공학회논문집 Vol.31 No.3
The installation of the expansion joints in a tunnel concrete lining and duct would minimize the cracking at the locationof structural shape and stiffness change, differential settlement, big temperature change, and so on. However, it is difficultto determine the required spacing of the expansion joint in a tunnel concrete lining and duct quantitatively becausethe spacing is influenced by temperature change, structure construction condition, ground-structure interaction, and etc. Nevertheless, a highway specification (Korea Expressway Corporation, 2012) or a road design manual (Ministry of Land,Transport and Maritime Affairs, 2010) specifies that the expansion joint spacing in a tunnel concrete lining should beinstalled uniformly smaller than 25 m from the tunnel portals to 50 m inside of a tunnel and elsewhre 20-60 m ina tunnel (because there is no specifcation for a duct it is assumed that a duct follows the specfication of lining). Thisspecification results in several construction and economic problems in relation with a tunnel construction. Accordingly,in order to minimize the problems, this study analyzed both domestic and foreign design standards and specifications. In addition, field test, theoretical and numerical analyses were carried out in relation to the expansion joint in a tunnellining and duct. The purpose of this study is to reestabilish a criterion for installing the expansion joint in a tunnelconcrete lining and duct.