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以某高速公路一座浅埋偏压连拱隧道为背景,在考虑洞身浅埋偏压和洞口仰坡耦合作用的条件下,采用M arc有限元程序对其洞口段隧道进行了动态施工模拟,系统研究了洞口段隧道围岩塑性区的分布和发展、正应力和剪应力的集中与转移,得出了偏压连拱隧道施工的力学响应规律。研究结果对同类隧道的设计和施工具有参考和借鉴意义。
Taking the shallow buried biased multi-arch tunnel of a highway as a background, the M arc finite element program was used to simulate the dynamic behavior of the tunnel at the tunnel entrance under the coupling of the shallow buried bias of the tunnel and the elevation of the tunnel. The distribution and development of the plastic zone of the surrounding rock of Dongkou tunnel, the concentration and transfer of normal stress and shear stress are systematically studied, and the mechanical response of the construction of the biased multi-arch tunnel is obtained. The research results have reference and reference significance for the design and construction of similar tunnels.