近距离重叠隧道的二维和三维有限元分析
2D and 3D Finite Element Analyses of Overlapping Tunnels
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摘要: 用ANSYS程序对深圳地铁一期工程3种典型的断面进行了计算,探讨了不同开挖顺序和支护方式的影 响.计算结果表明,第2孔隧道开挖对已建的第1孔隧道有较大影响;开挖顺序不同,位移大小及塑性区位置与 大小不同,先开挖下洞较为有利;同步支护位移小,能有效控制地表下沉.Abstract: ANSYS, a finite element program, was used to analyze three typical cross-sections for the first stage of Shenzhen metro project, and the effects of different driving sequences and lining methods were investigated. The calculated result shows that the construction of the second tunnel has an effect on the constructed tunnel, the displacement and the plastic zone are different for different driving sequences, and it is better to drive the upper tunnel when the lower one has been driven. In addition, simultaneous lining is helpful for the control of surface subsidence
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Key words:
- tunnel /
- overlapping layout /
- surface subsidence /
- lining
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