土工基础

土工基础 ›› 2026, Vol. 40 ›› Issue (2): 307-312.

• 专题论述 • 上一篇    下一篇

新建公路跨线桥施工对既有高铁路基影响及稳定性分析

黄鑫   

  1. （中土集团福州勘察设计研究院有限公司，福州 350013）
  • 收稿日期:2025-06-09 修回日期:2025-07-02 出版日期:2026-04-30 发布日期:2026-04-23
  • 作者简介:黄鑫（1993-），男，工程师，研究方向为路基工程。

Impact and Stability Analysis of New Highway Overpass Bridge Construction on Existing High-Speed Railway Embankment

HUANG Xin   

  1. (Fuzhou Survey and Design Institute Co. Ltd., China Civil Engineering Construction Co. Ltd., Fuzhou 350013)
  • Received:2025-06-09 Revised:2025-07-02 Online:2026-04-30 Published:2026-04-23

摘要： 新建公路跨线桥的施工会对临近既有高铁路基产生较大的附加水平应力和位移，进而影响高铁的运营安全。以京台通道支线闽侯至平潭高速公路工程上跨杭深线路基段为例，运用有限元软件Midas GTS NX建立跨线桥桥墩与既有高铁铁路路基的三维数值计算模型，跨线桥桥墩基坑支护施工及开挖前后对既有高铁路基影响的二维数值计算模型，进行桥梁施工阶段的数值分析，运用理正边坡分析软件分析跨线桥桥墩基坑支护施工对既有高铁路基边坡的稳定性的影响，评估新建公路跨线桥施工对高铁路基的影响。分析结果表明，新建跨线桥的施工对临近既有高铁路基的影响可控，各项位移变形值均符合规范的要求。

关键词: 公路工程, 跨线桥, 上跨施工, 铁路路基, 数值分析

Abstract: The construction of a new highway overpass bridge imposes significant additional horizontal stresses and displacements on adjacent existing high-speed railway embankments, potentially affecting operational safety. This study evaluates the impact using the Minhou-Pingtan Expressway project crossing the Hangzhou-Shenzhen Line as a case study. Three-dimensional finite element models (Midas GTS NX) simulated bridge piers and railway embankments, while two-dimensional models analyzed deep excavation and support effects. Lizheng Slope software additionally assessed slope stability. Comprehensive analysis confirms the construction impact on the high-speed railway subgrade is controllable, with all displacement and deformation values meeting regulatory requirements.

Key words: Highway Engineering, Overpass Bridge, Cross-Over Construction, Railway Embankment, Numerical Analysis

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