Upper bound analysis for deep tunnel face with joined failure mechanism of translation and rotation
来源期刊：中南大学学报(英文版)2015年第11期
论文作者：XU Jing-shu DU Dian-chun YANG Zi-han
文章页码：4310 - 4317
Key words：deep tunnel; upper bound; translation and rotation; water pressure; nonlinearity
Abstract: A joined failure mechanism of translation and rotation was proposed for the stability analysis of deep tunnel face, and the upper bound solution of supporting force of deep tunnel was calculated under pore water pressure. The calculations were based on limit analysis method of upper bound theory, with the employment of non-associated Mohr-Coulomb flow rule. Nonlinear failure criterion was adopted. Optimized analysis was conducted for the effects of the tunnel depth, pore water pressure coefficient, the initial cohesive force and nonlinear coefficient on supporting force. The upper bound solutions are obtained by optimum method. Results are listed and compared with the previously published solutions for the verification of correctness and effectiveness. The failure shapes are presented, and results are discussed for different pore water pressure coefficients and nonlinear coefficients of tunnel face.
XU Jing-shu(许敬叔), DU Dian-chun(杜佃春), YANG Zi-han(杨子汉)
(School of Civil Engineering, Central South University, Changsha 410075, China)
Abstract:A joined failure mechanism of translation and rotation was proposed for the stability analysis of deep tunnel face, and the upper bound solution of supporting force of deep tunnel was calculated under pore water pressure. The calculations were based on limit analysis method of upper bound theory, with the employment of non-associated Mohr-Coulomb flow rule. Nonlinear failure criterion was adopted. Optimized analysis was conducted for the effects of the tunnel depth, pore water pressure coefficient, the initial cohesive force and nonlinear coefficient on supporting force. The upper bound solutions are obtained by optimum method. Results are listed and compared with the previously published solutions for the verification of correctness and effectiveness. The failure shapes are presented, and results are discussed for different pore water pressure coefficients and nonlinear coefficients of tunnel face.
Key words:deep tunnel; upper bound; translation and rotation; water pressure; nonlinearity
