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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.19 No.5

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Experimental study on the ground arching depending on the deformation type of the crown in the shallow tunnel

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2017, v.19 no.5, pp.733-747
https://doi.org/10.9711/KTAJ.2017.19.5.733


& (2017). Experimental study on the ground arching depending on the deformation type of the crown in the shallow tunnel. (사)한국터널지하공간학회, 19(5), 733-747, https://doi.org/10.9711/KTAJ.2017.19.5.733

Abstract

In the shallow tunnel, the surrounding ground could be loosened and deformed,which could be the cause of stress change in the ground. Terzaghi has clarified thedevelopment of a ground arching induced by the deformation of a tunnel crown in thetrap door tests. However, he considered only the case in which that the tunnel crowndeformed uniformly. He did not consider the effect of deformation shapes. Therefore,the relation between the shape of the ground relaxation above the tunnel crown and thedeformation shape of the tunnel crown is not clear yet. In this study, model tests wereperformed for the three types of the tunnel crown, such as uniform, concave andconvex shapes. As results, it was found that the vertical load would be transferred invarious types depending on the deformation shapes of the tunnel crown.

keywords
굴진면, 한계변위, 얕은터널, 모형실험, 종방향하중전이, Tunnel face, Ultimate displacement, Shallow tunnel, Model test, Longitudinal load transfer

Reference

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