In view of the many crossing areas of urban subway station tunnel groups, the construction is difficult, the form of force is complicated, and safety risks are prone to appear. Relying on Nanning Qingxiushan metro station, a three-dimensional numerical model was established to assist on-site monitoring data, and the deformation of surrounding rock, stress changes, and plastic zone distribution during the construction of the tunnel group were analyzed, and the dynamic mechanics of the cross passage of the left tunnel behavioral research. The tunnel is significantly affected by the upper biased foundation pit, the displacement and stress of the surrounding rock at the intersection of the tunnel on the biased side are significantly greater than that on the non-biased side; The excavation of the cross passage has a significant impact on the intersection and large plastic strains appear in the intersection area; After the left-line tunnel is broken, the lining vault of the opening will generate tensile stress, there will be obvious stress concentration in the arch shoulder and arch foot area. Selecting appropriate deformation control measures can ensure the safety of the structure.

Li Zhiyong. Study on Construction Mechanical Behavior of Intersection of Tunnel Group in Metro Station. Academic Journal of Engineering and Technology Science (2025), Vol. 8, Issue 4: 142-149. https://doi.org/10.25236/AJETS.2025.080418.

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