复杂环境下新建桥梁与排水改造对地铁结构受力影响分析

Analysis of the influence of new bridges and drainage renovation on the stress of metro structures in complex environments

在当前社会经济快速发展的背景下,许多城市开始兴建大型高架桥梁。然而,这些桥梁的设计和建设面临一系列挑战。由于城市环境的空间限制,桥梁的跨度布置和下部结构设计常常与周边既有建筑物距离较近。为深入分析新建桥梁与排水改造施工对运营地铁结构的影响,基于广州地区某隧道工程桥梁段,采用大型数值分析软件MIDASGTSNX,建立三维有限元模型。通过分析三维动态模拟结果,深入总结出项目施工诱发的邻近地铁结构变形与受力情况。该项研究可为城市桥梁建设提供重要的计算依据与实践指导。

Against the backdrop of rapid socio-economic development,many cities have begun to build large elevated bridges.However,the design and construction of these bridges face a series of challenges.Due to spatial limitations in urban environments,the span layout and substructure design of bridges often have a close proximity to existing surrounding buildings.To investigate the impact of new bridge construction and drainage renovation on the operation of subway structures,this paper is based on a bridge section of a tunnel project in Guangzhou,and uses the large-scale numerical analysis software MIDAS GTS NX to establish a three-dimensional finite element model.By analyzing the results of three-dimensional dynamic simulation,we can deeply summarize the deformation and stress situation of adjacent subway structures induced by project construction.This study can provide important calculation basis and practical guidance for urban bridge construction.