交叉渡线类矩形管节断面结构性能分析与验证

Analysis&Verification of Structural Performance of Cross-Over Rectangular Pipe Section

以杭州四季青站折返线交叉渡线段为研究对象,该工程受高架、管线等影响无法采用常规明挖法施工,结合交叉渡线建筑限界需求采取无立柱类矩形顶管法施工。通过理论分析、有限元数值模拟、现场实验等手段,分析无立柱类矩形管节在运营、施工工况下的结构变形及内力分布规律,并通过现场监测数据与数值模拟、管节实验数据进行对比分析。研究表明,无立柱类矩形管节断面满足交叉渡线复杂空间及结构受力需求,解决了复杂工况条件下折返线交叉渡线明挖法不适用难题,值得类似工程参考借鉴。

Taking the cross section of the Hangzhou Sijiqing Station turnaround line as the research object,the project cannot be constructed using conventional open cut method due to the influence of elevated structures,pipelines,etc.Combining with the construction limit requirements of the cross section,a rectangular pipe jacking method without columns is adopted for construction.Through theoretical analysis,finite element numerical simulation,field experiments,and other methods,analyze the structural deformation and internal force distribution of rectangular pipe sections without columns under operating and construction conditions,and compare and analyze the on-site monitoring data with numerical simulation and pipe section experimental data.The research has shown that the cross-section of rectangular pipe sections without columns meets the complex spatial and structural stress requirements of crossover lines,solving the problem of the unsuitability of open excavation methods for crossover lines under complex working conditions.It is worth referring to and learning from similar engineering projects.