盾构下穿在建铁路明洞变形控制指标研究

DEFORMATION CONTROL OF THE SHIELD UNDER THE OPEN HOLE OF THE RAILWAY UNDER CONSTRUCTION INDICATOR RESEARCH

依托某快线盾构隧道下穿在建城际铁路联络线榆安隧道工程案例,通过规范调研和理论计算,提出在建明挖法铁路隧道受邻近施工影响洞身位移和变形缝张开/错动变形控制指标,并进行了考虑隧道变形缝的非连续介质模型分析,分析过程和结论可为类似项目规划设计和工程措施提供参考。

This paper relies on the case of an express line shield tunnel undercrossing the under construction Yu'an Tunnel of an inter-city railroad,and proposes the deformation control indexes of tunnel displacement and deformation joints opening/misalignment of a cut-and-cover railroad tunnel under construction affected by neighboring construction by means of normative research and theoretical calculations,and carries out the analysis of the construction impact by means of numerical simulation,and the analytical process and conclusions can be used as references for the planning and design of similar projects and engineering measures.