公路路堑下穿既有高速铁路桥梁的影响研究

文章以某新建公路路堑下穿既有高速铁路桥梁为工程背景,分别采用改进的分层总和法和弹塑性三维有限元仿真分析方法研究新建公路路堑下穿对既有高速铁路桥墩隆起变形的影响;进一步在施工过程中,采用自动化监测与人工监测两种方式对既有高速铁路竖向变形开展测量工作,获得了亚毫米级精度的可信数据。最后对计算结果与监测数据进行对比分析,分析结果可为类似工程提供经验借鉴。

Research on the Influences of Highway Cutting Underpassing Existing High-speed Bridge

This paper takes a new highway cutting underpassing existing high-speed railway bridge as the engineering background,the elastic-plastic 3D finite element simulation analysis method and the layer-wise summation method are separately adopted,the influences of the underpassing of the newly-built highway cutting on uplift deformation of piers of the existing highway speed railway are studied;moreover,the measurement of the vertical deformation for the existing high speed railway are carried out by adopting automatic monitoring and manual monitoring,the reliable data with the precision of sub-millimeter is obtained.These data are compared with the calculated results,which can provide reference for similar projects.