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Investigation of Tunnel Stress Path During Face Advancement

Published online by Cambridge University Press:  05 May 2011

C.-N. Chen*
Affiliation:
Department of Construction Engineering, National Taiwan University of Science & Technology, Taipei, Taiwan 10607, R.O.C.
W.-Y. Huang*
Affiliation:
Department of Construction Engineering, National Taiwan University of Science & Technology, Taipei, Taiwan 10607, R.O.C.
*
*Associate Professor
**Ph.D. student
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Abstract

Tunnel stress path during excavation was investigated in the study scope. The triple-center section is commonly designated for highway tunnels, but the analytical solution of the stress state for a non-circular tunnel section with multiple bench excavations is difficult to obtain. Our investigation provides an algorithmic procedure which reliably evaluates stress adjustment of a bench excavation with respect to the three-dimensional state of stress. Evaluation of a safety factor at the tunnel face during advancement is performed following the stress path and principal stress space.

Type
Technical Note
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2007

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