桩板结构下穿多条运营高铁桥梁的变形研究分析

兰鸿翔

摘要:

为研究新建市政道路桩板结构下穿对高速铁路桥梁变形的影响，本文以某新建市政道路工程下穿既有高铁桥梁为工程实例，为确保铁路运营的安全，利用桩土共同作用有限元软件Midas GTS NX模拟分析该工程实施以及运营期间引起的既有高铁桥梁的附加变形。结果表明：该新建市政道路工程采用桩板结构下穿方案对高铁桥梁影响较小，且理论结果与现场北斗自动化监测高铁桥梁变形趋势大体一致，结果较吻合，均在规范变形控制范围内。

Abstract:

Abstract: In order to study the influence of pile slab structure under the new municipal road on the deformation of high-speed railway bridge, this paper takes a new municipal road project under the existing high-speed railway bridge as an example, To ensure the safety of railway operation, using the finite element software of pile-soil interaction Midas GTS NX to simulate and analyze the additional deformation of the existing high-speed railway bridge caused by the implementation and operation of the project. The results show that the new municipal road project adopts the pile slab structure underpass scheme, which has little impact on the high-speed railway bridge, The theoretical results are generally consistent with the deformation trend of high-speed railway bridge monitored by Beidou automation on site, and the results are in good agreement, which are within the standard deformation control range.