小间距平行隧道TBM施工影响分析

发布时间：2018-05-25 05:04

本文选题：地铁隧道 + 盾构法　；参考：《建筑结构》2016年S2期

【摘要】：结合重庆轨道交通环线凤鸣山站-上桥站区间TBM施工隧道工程,采用现场监测与ANSYS有限元数值模拟的计算方法,针对后行隧道施工对先行隧道的受力及其变形的影响进行分析。研究表明,在双线平行隧道施工时,后行隧道施工会对先行隧道造成挤压的作用,导致隧道管片横向变形减小,环向内力改变;并且通过改变双线平行隧道的间距,认为在砂岩(4级围岩)情况下,隧道净间距超过6.6m(1D)时,施工相互影响较弱,可以不进行加固。
[Abstract]:Combined with the TBM construction project between Fengmingshan Station and Shangqiao Station of Chongqing Rail Transit Loop Line, the field monitoring and ANSYS finite element numerical simulation method are used to analyze the influence of the rear tunnel construction on the stress and deformation of the advance tunnel. The research shows that, in the construction of two-line parallel tunnel, the construction of the rear tunnel will result in the extrusion of the first tunnel, resulting in the decrease of transverse deformation of the tunnel segment, the change of the circumferential internal force, and the change of the spacing of the two-line parallel tunnel. It is considered that in the case of sandstone grade 4 surrounding rock, the construction interaction is weak when the net spacing of the tunnel is greater than 6.6 m ~ (-1), so the reinforcement can not be carried out.
【作者单位】：中交一公局第三工程有限公司;
【分类号】：U455.43;U231.3

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