根据地铁车站重合结构模型受力特点，结合西安地区黄土地层条件下地铁工程设计实例，分别对施工阶段和正常使用阶段最不利荷载工况条件下车站主体结构的内力进行了研究，主要以弯矩为例对各不利工况下内力变化规律进行了分析总结，最后对围护结构参与主体结构计算时的贡献程度作了比较分析，可供类似工程参考。%According to the stress characteristics of metro station coincidence structure model,combining with the subway engineering design ex-ample in Xi’an area under loess strata conditions,respectively researched the station main structure internal force under most unfavorable load working conditions to construction stage and normal use stage,mainly taking the bending moment as an example analyzed and summarized the in-ternal force variation rule under unfavorable working conditions,finally compared and analyzed the contribution degree of envelop enclosure in-volved in main structure calculation,provided reference for similar engineering.
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