2006•Journal of Korean Tunnelling and Underground Space AssociationRequires access

Effects of Tunnel Construction on an Existing Tunnel Lining

Chung Sik Yoo, Ah-Ran Song

Abstract

Effects of new tunnel construction on an existing tunnel are investigated in this paper. A parametric study was conducted on a number of conditions in terms of relative location of the new tunnel to the existing tunnel using 2D and 3D finite element models. The results indicated that the new tunnel construction imposes most severe effect on the existing tunnel's lining when located below the existing tunnel's springline for cases in which the new tunnel is constructed parallel to the existing tunnel. It is also revealed that the effect to the new tunnel construction is larger when the new tunnel is constructed under the existing tunnel than above for cases in which the new tunnel is crossed with the existing tunnel. Practical implications of the finding are discussed.

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Key concepts: Tunnel construction, Engineering, Railway tunnel, Structural engineering, Parametric statistics, Geotechnical engineering, Mathematics, Statistics