轨道交通安全保护区人行天桥施工保护措施研究

Research on Construction Protection Measures for Pedestrian Bridges in Rail Transit Safety Protection Zones

摘要: 本文以重庆某轨道交通安全保护区内人行天桥工程为研究对象，运用有限元软件模拟分析了施工及运营各阶段对轨道交通区间隧道的位移影响，结果表明各阶段隧道变形均符合规范要求，且运营阶段影响最大。并通过识别出桩基施工扰动、吊装作业加载、运营期加载三类风险，从项目审批、施工过程控制、施工工艺管控、第三方监测等方面提出项目轨道安全保护措施。研究结果能够为轨道交通安全保护区管理工作提供借鉴。

Abstract: This paper takes a pedestrian bridge project within a rail safety protection zone in Chongqing as the research object. Finite element software is used to simulate and analyze the displacement impact on the rail transit interval tunnel during various stages of construction and operation. The results show that the tunnel deformation at all stages meets the specification requirements, with the greatest impact occurring during the operation stage. By identifying three types of risks—pile foundation construction disturbance, hoisting operation loading, and operational loading—corresponding rail safety protection measures are proposed from the aspects of project approval, construction process control, construction technology management, and third-party monitoring. The research findings can serve as a reference for the management of rail transit safety protection zones.