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以石家庄地铁一号线一期工程石家庄东站-东杜庄站盾构区间隧道下穿石德铁路为背景,利用有限元软件ANSYS14.0建立三维有限元模型,分析预测盾构法施工对既有石德铁路线路造成的沉降变形及水平变形影响;并对比当两隧道的开挖面前后间隔距离不同时对铁路的沉降差异,得到:当两隧道开挖前后间距大于24m时,铁路沉降与先后单独开挖两隧道接近,地表铁路不再因隧道开挖顺序不同而产生附加的变形影响。为以后类似工程施工与设计提供参考。
Based on the Shidie railway under Shijiazhuang East Railway Station - Dongduzhuang Station shield tunnel under Shijiazhuang Subway Line 1 project, finite element software ANSYS14.0 was used to establish three-dimensional finite element model to analyze and predict the construction of shield tunneling on both And the deformation caused by the deformation and horizontal deformation of the railway line caused by the Shide Railway. The comparison of the settlement difference between the two tunnels before and after the excavation is carried out is shown as follows: when the spacing between the two tunnels is greater than 24m, the settlement and Two tunnels were successively excavated close to each other, and the surface railways no longer have additional deformation effects due to different tunnel excavation sequences. For similar projects in the future construction and design provide a reference.