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A Study of Interactions Between Perpendicularly Spaced Tunnels  

Kim, Sang-Hwan (Faculty in Civil Engrg., Hanseo Univ.)
Lee, Hyung-Joo (Samgsung Engrg. & Construction)
Publication Information
Journal of the Korean Geotechnical Society / v.19, no.5, 2003 , pp. 273-280 More about this Journal
Abstract
This paper describes a study of the effect of shield tunnel construction on the liners of nearby existing perpendicular tunnels. The research programme investigated the influence of tunnel proximity and alignment, liner stiffness on the nature of the interactions between closely spaced tunnels in clay. A total of two sets of carefully controlled 1g physical model tests, including the same test for repeatability, were performed. A cylindrical test tank was developed and used to produce clay samples of Speswhite kaolin. In each of the tests, three model tunnels were installed in order to conduct two interaction experiments in one clay sample. The tunnel liners were installed using a model tunnelling machine that was designed and developed to simulate the construction of a full scale shield tunnel. The first tunnel liner was instrumented to investigate its behaviour due to the installation of each of the new tunnels. The interaction mechanisms observed from the physical model tests are discussed and interpreted.
Keywords
Liner stiffness; Model tunnelling machine; Perpendicular tunnels; Shield tunnel;
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