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以北京轨道交通6号线一期暗挖区间隧道为工程背景,运用数值模拟技术研究了不同埋深条件下地铁区间暗挖隧道施工对洞周地层的扰动背景,数值计算结果基本与实验实测数据吻合,计算模型很好地反映了隧道的受力特点,揭示了隧道埋深与隧道拱顶的应力变化规律,同时还发现地表深降与隧道埋深呈负相关性的规律,对同类工程有一定指导意义。
Taking the first tunnel of Beijing Metro Line 6 as an example, the background of the disturbance to the surrounding rock cavity of the tunnel under different depths was studied by using numerical simulation technique. The numerical results are basically consistent with the experimental data Coincide with each other, the calculation model reflects the stress characteristics of the tunnel well, reveals the stress variation of the tunnel depth and the tunnel vault, and also found that the surface depth and the tunnel depth are negatively correlated. For similar projects A certain guiding significance.