浅埋暗挖地铁区间变形稳定性分析

Analysis on the Deformation Stability of Shallow Burying and Underground Excavation in the Subway Section

近年来,随着地铁建设的蓬勃发展,地铁施工过程中引起地表变形规律的研究对后续施工起着越来越重要的指导作用。本文以北京地铁十四号线某地铁站区间为依托,运用工程实测数据,结合有限元分析软件Midas/GTS进行地铁区间施工的数值模拟,分析施工过程中区间隧道断面的变形规律,通过模拟结果与实际测量数据作对比,分析其产生差异的原因,模拟分析区间隧道左线、右线不同洞间距对围岩变形及地表沉降的影响,提出地铁区间开挖的最合适的洞间距。为以后类似工程提供参考和借鉴。

This paper analyzes the deformation law of interval tunnel section in the construction process and proposes the most suitable tunnel spacing of the subway section by simulation analysis of the infiuences of different hole spacing on the surrounding rock deformation and surface settlement of the tunnel left and right lines. The principle is explored by utilizing the practical data and the numerical simulation of Metro interval construction with the finite element analysis software Midas/GTS on the basis of Beijing Metro Line fourteen. Analysis of the causes of the differences is based on the comparison between simulation results and actual measurement data. With the rapid development of subway construction, the research on the deformation law of surrounding rock during the construction process plays an increasingly important role in the follow-up construction in recent years. This paper may provide a reference for similar projects in the future.