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公路的新建或者扩建工程对周围已建工程的影响是一项关键的技术问题。针对苏州相城大道扩建工程下穿京沪高铁工程,应用有限单元法建立高铁群桩和公路群桩整体三维有限元模型,考虑了完整的施工步骤和运营期荷载,以高铁桥墩桩基侧摩阻力、轴力、桩身侧向变形为研究对象,对比分析了两种施工方案对高铁桥墩桩基的影响,揭示该扩建工程对高铁桩基的影响规律,为完善设计和施工方案提供了技术支持,并为类似问题的研究提供了参考。
The impact of road construction or expansion project on the surrounding construction is a key technical issue. Aiming at the expansion project of Xiangcheng Avenue in Suzhou under the Beijing-Shanghai high-speed railway project, a three-dimensional finite element model of high-speed railway group pile and highway group pile was established by finite element method. Considering the complete construction steps and operation load, Resistance, axial force and lateral deformation of the pile body as the research object, the influence of two kinds of construction schemes on the pile foundation of the high-speed railway bridge piers is comparatively analyzed, and the influence rules of the extension project on the high-speed railway pile foundation are revealed, providing technology for perfecting the design and construction plan Support, and provide a reference for the research of similar problems.