Evaluation of impending collapse in circular tunnels by analytical and numerical approaches

作者：Fraldi M^*; Guarracino F

来源：Tunnelling and Underground Space Technology, 2011, 26(4): 507-516.

DOI：10.1016/j.tust.2011.03.003

• Circular tunnels
• Impending collapse
• Plasticity
• Limit analysis
• Numerical analysis

On the basis of a straightforward analytical approach which has been recently proposed by the present authors, a comparison with numerical procedures to predict plastic collapse in circular rock tunnels is reported. In fact, numerical modeling of the evolution of progressive failure leading to collapse in tunnels is a quite complicated matter and requires great care in modeling the problem and interpretating the results. In order to provide a guide to engineers facing rock limit state problems, a few examples by means of three commercial packages are presented, discussed in details and confronted with the analytical results.

• 出版日期2011-7