理论研究 2025年 第卷 第18期

DOI: 10.7672 / sgjs2025180009

马蹄形盾构隧道开挖面非线性稳定性评估

刘小春¹,谢海龙¹,金毅¹,耿鹏飞¹,陈光辉²’³

作者简介：

刘小春，高级工程师，E-mail: liu_t123456@ 163. com

作者单位：

1.中铁一局集团有限公司，陕西西安 710054; 2.郑州大学土木工程学院，河南郑州 450001; 3.中南大学土木工程学院，湖南长沙 410075

基金项目：

∗2025 年国家资助博士后研究人员计划（GZC20252112）；湖南省交通科技项目（202303）

摘要：

岩土在外力作用下破坏多表现为非线性特征。目前尚缺乏考虑非线性破坏特性条件下马蹄形盾构隧道开挖面稳定性的研究。基于此，采用非线性 Mohr-Coulomb 失效准则表征岩土非线性破坏特性。通过对圆形旋转失稳模型改进，建立了马蹄形旋转失稳模型。在极限分析法框架下，将非线性 Mohr-Coulomb 失效准则与所构建失稳模型结合，提出了马蹄形盾构隧道开挖面非线性稳定性评估模型。研究结果表明：忽略岩土非线性破坏特性会导致隧道开挖面稳定性评估偏于不安全；马蹄形和等面积圆形隧道开挖面稳定性评估结果接近，可采用圆形隧道计算所得极限支护压力值和三维失稳面对等面积马蹄形盾构隧道开挖面稳定性进行评估。
隧道；盾构；开挖面；稳定性；非线性；旋转失稳模型；极限分析法

English：

Geotechnical failure under external forces is mostly characterized by nonlinear feature. Fewworks investigate the face stability of horseshoe shield tunnel considering nonlinear failure feature. Basedon this, the nonlinear failure feature is denoted by nonlinear Mohr-Coulomb failure criterion. Thehorseshoe rotational failure model is developed by improving the circular rotational failure model. In thecontext of limit analysis method, a nonlinear stability analysis model for horseshoe shield tunnel face isproposed by combining the nonlinear Mohr-Coulomb failure criterion and horseshoe rotational failuremodel. The results show that: Neglecting the nonlinear feature will result in unsafe estimations for tunnelface stability; Stability analysis results of horseshoe tunnel face are close to the those for circular tunnelface with equivalent area. The limit support pressure and three-dimensional failure surface for circulartunnel face can be utilized to assess the stability of horseshoe tunnel face with equivalent area.