Continuous field based upper bound analysis for three-dimensional tunnel face stability in undrained clay
Continuous field based upper bound analysis for three-dimensional tunnel face stability in undrained clay
复制标题
DOI：
10.1016/j.compgeo.2017.09.014
复制
发表时间：
2018-02
影响因子：
5.3
通讯作者：
Maosong Huang;Sen Li;Jian Yu;Jorgin Qi Wen Tan
中科院分区：
文献类型：
--
作者：
Maosong Huang;Sen Li;Jian Yu;Jorgin Qi Wen Tan
提出了一种适用于不排水粘土三维稳定性问题的数值上界方法，并将其应用于巷道工作面稳定性分析。与弹塑性有限元法（FEM）的比较表明，该方法能够提供足够精确的巷道工作面稳定因子上限预测。对于覆盖深度较大的隧道，所得结果大大改进了已有的上界解。研究了它们对应的速度场，其演化规律与有限元计算结果相似。比较了多块机构和连续机构在巷道工作面稳定中的各种优势。
A new numerical upper-bound method applicable to three-dimensional stability problems in undrained clay is proposed and applied in the analysis of tunnel face stability. Comparisons with the elasto-plastic finite element method (FEM) reveal that this method could provide sufficiently accurate upper-bound prediction for the tunnel face stability factors. For tunnels with large cover depth, the obtained results greatly improve the existing upper-bound solutions. Their corresponding velocity fields are investigated, which show a similar evolving pattern with those of the FEM. A discussion is made to compare the various advantages of multi-block mechanisms and continuous mechanisms in tunnel face stability.