Centrifuge model test on the face stability of shallow tunnel |
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| Authors: | Gregor Idinger Pelin Aklik Wei Wu Ronaldo I Borja |
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| Institution: | (1) Institute of Geotechnical Engineering, Universit?t f?r Bodenkultur, 1180 Vienna, Austria;(2) Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA |
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| Abstract: | This paper is an investigation of face stability on a small-scale tunnel model in a geotechnical centrifuge. By making use
of symmetry, half of the tunnel cross section was considered. The support at excavation face was provided by a piston, which
was adjusted during flight. Some aspects on the collapse at tunnel face are investigated for different overburden pressures:
failure mechanism, surface settlement, stress acting at tunnel face, and the required face support counteracting the earth
pressure. Ground deformation was observed through a transparent wall and measured by digital image correlation. The results
from centrifuge model tests were compared with theoretical models. |
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