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http://dx.doi.org/10.12989/gae.2022.29.3.331

Reliability analysis of tunnel face stability considering seepage effects and strength conditions  

Park, Jun Kyung (Department of Civil and Environmental Engineering, Daelim University College)
Publication Information
Geomechanics and Engineering / v.29, no.3, 2022 , pp. 331-338 More about this Journal
Abstract
Face stability analyses provides the most probable failure mechanisms and the understanding about parameters that need to be considered for the evaluation of ground movements caused by tunneling. After the Upper Bound Method (UBM) solution which can consider the influence of seepage forces and depth-dependent effective cohesion is verified with the numerical experiments, the probabilistic model is proposed to calculate the unbiased limiting tunnel collapse pressure. A reliability analysis of a shallow circular tunnel driven by a pressurized shield in a frictional and cohesive soil is presented to consider the inherent uncertainty in the input parameters and the proposed model. The probability of failure that exceeding a specified applied pressure at the tunnel face is estimated. Sensitivity and importance measures are computed to identify the key parameters and random variables in the model.
Keywords
face stability; importance measures; probabilistic model; reliability analysis; sensitivity; UBM;
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Times Cited By KSCI : 6  (Citation Analysis)
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