基于有限元数值模拟的单侧壁导坑法隧道施工工艺研究

Research on Single Side Wall Heading Tunnel Construction TechnologyBased on Finite Element Numerical Simulation

针对重庆山区隧道工程中大断面软弱围岩的开挖问题,研究分析了现有单侧壁导坑法在施工稳定性和成本控制方面的局限性,优化了单侧壁导坑法,通过移除部分支撑结构并增设钢板来提升结构稳定性,实施了3台阶7步开挖法,有效控制了围岩变形。

In response to the excavation problem of large section weak surrounding rock in tunnel engineering in mountainous areas of Chongqing,the limitations of the existing single side wall heading method in construction stability and cost control were studied and analyzed.The single side wall heading method was optimized by removing some supporting structures and adding steel plates to improve structural stability.The three-bench seven-step excavation method was implemented to effectively control the deformation of the surrounding rock.