地铁重叠隧道施工顺序研究

文章以深圳地铁三号线老-东区间盾构隧道工程为背景,采用有限元数值模拟研究方法,对地铁重叠隧道段在地表无任何建筑物和地表有房屋基础两种工程条件下,采用先上洞后下洞和先下洞后上洞两种施工顺序的盾构区间隧道施工全过程的力学行为进行了分析对比。通过分析,揭示出了相关的研究成果与实际施工顺序不同的关键所在,可为今后类似工程的设计与施工提供参考。

Study on the construction sequence of overlapped metro tunnels

In accordance with the shield tunneling of the transit tunnels on line 3 of Shenzen metro,a comparative study was carried out by finite element numerical simulation on the behavior of the whole construction process of the overlapped tunnels,considering two cases: with building foundations or without buildings on ground surface on the overlap section and two options of construction sequence: upper tunnel excavated first and lower tunnel second or lower tunnel excavated first and upper tunnel second.The study revaeled the key points for the contradictions between the relevant research results and the actual construction process.The study can be taken for reference by similar design and construction.