山东大学学报 (工学版) ›› 2022, Vol. 52 ›› Issue (4): 166-174.doi: 10.6040/j.issn.1672-3961.0.2021.478
• • 上一篇
谢海旭1,肖世国2*
XIE Haixu1, XIAO Shiguo2*
摘要： 针对铁路高填方路基工程设计中存在的问题,提出了一种新型路堤结构——箱型路堤结构。其整体结构由下部的中空钢筋混凝土箱型体和上部的道床结构组成,具有占地面积小、自重低、整体刚度大、稳定性高等优点,适于用地受限、填方高度较大、地基较为软弱等情况。通过力学等效拆分,将箱型结构拆分为上部的框架结构和下部的底板,前者采用结构力学方法、后者采用弹性地基梁方法进行分析,其间将底板位移引入上部结构分析中,该方法充分考虑了地基-底板-上部结构的相互作用。以帕德玛大桥某单线路基工点为实例,对提出的箱型路基型式进行验证。实例分析表明:箱型路堤结构的弯矩极大值位于顶板或底板的跨中截面,剪力极大值位于顶板与腹板或中隔板连接处,腹板承受的弯矩与剪力较小。中隔板的设置对箱型路堤结构受力改善效果显著,可使顶板与底板的最大弯矩降低40%以上。
中图分类号:
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