Upper bound solution for supporting pressure acting on shallow tunnel based on modified tangential technique

作者：Yang Xiao-li^*; Yang Zi-han; Li Yong-xin; Li Shu-cai

来源：Journal of Central South University, 2013, 20(12): 3676-3682.

DOI：10.1007/s11771-013-1895-y

• shallow tunnel
• upper bound theorem
• nonlinear failure criterion
• modified tangential technique

Based on the nonlinear failure criterion and the upper bound theorem, the modified tangential technique method was proposed to derive the expression of supporting pressure acting on shallow tunnel. Instead of the same stress state, different normal stresses on element boundaries were used. In order to investigate the influence of different factors on supporting pressures, the failure mechanism was established. The solution of supporting pressure, with different parameters, was obtained by optimization theory. The corresponding failure mechanism and numerical results were presented. In comparison with the results using the single tangential technique method, it is found that the proposed method is effective, and the good agreement shows that the present solution of supporting pressure is reliable.

• 出版日期2013-12
• 单位山东大学; 中南大学