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以某双连拱隧道洞口段为例,基于ADINA软件对其开挖所产生围岩变形进行数值分析,并对地表沉降、拱顶下沉及水平收敛变形情况进行现场监测,将两者结果进行对比分析。研究结果表明,采用分步开挖方式能有效控制双连拱软岩隧道围岩的稳定性,监测结果也验证分步开挖方式的可靠性。
Taking the section of a double-arch tunnel as an example, the numerical analysis of surrounding rock deformation caused by excavation is carried out based on ADINA software. The on-site monitoring of surface settlement, dome subsidence and horizontal convergence and deformation is carried out. Comparative analysis. The results show that the stepwise excavation method can effectively control the stability of the surrounding rock of the double-arch soft rock tunnel and the monitoring results also verify the reliability of the step-by-step excavation method.