Taking Shijiazhuang Metro Line 1 Zhongshan Square Station to Liberation Square Station crossover excavation in small spacing Hole 2 and Hole 3 parallel construction problems as the research object, the paper,with three-dimension finite element analysis method makes a study of the horizontal channel in the three hole tunnel radial cross in order to advance the construction of the research.It also adopts the double side heading method in construction of the subway tunnel of large section.It is proved that the second line modifies the order and the entire space model to carry on the numerical simulation with actual measured results.It is concluded that the optimal construction sequence is good in tunnel side small tunnel excavation.%以石家庄地铁1号线中山广场站-解放广场站交叉渡线暗挖施工中超小净距2洞和3洞并列施工难题为研究对象,利用三维有限元分析方法,对横通道在3孔隧道中径向横穿时对向掘进施工顺序研究、双侧壁导坑法在地铁隧道大断面施工中的应用、二衬施作顺序及整个空间模型进行数值模拟计算,并与现场实测结果对比,得出边导洞先行的最优施工顺序.
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