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1 results

Investigation of Tunnel Stress Path During Face Advancement
C.-N. Chen, W.-Y. Huang
Journal:

Journal of Mechanics / Volume 23 / Issue 4 / December 2007

Published online by Cambridge University Press:

05 May 2011, pp. 451-458

Print publication:

December 2007
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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.