铁路路桥过渡段纵向沉降变形规律及影响因素研究
Study on Longitudinal Settlement Deformation Law and Influencing Factors of Railway Road and Bridge Transition Section
邢彪1
作者信息
- 1. 中铁十八局集团第一工程有限公司,河北保定 072750
- 折叠
摘要
依托郑徐铁路客运专线兰考南站段路基工程项目,针对铁路路桥过渡段易发生不均匀沉降的问题,进行过渡段沉降监测,分析过渡段沉降的时间、空间分布规律;建立过渡段ABAQUS有限元模型并验证模型的有效性,基于有限元模型进一步分析地基弹性模量及过渡段填料、形状对铁路路桥过渡段沉降的影响,结果表明:各监测点的沉降值随时间变化趋势均表现为早期沉降变化较大,铺轨后运营期逐渐趋于平稳;过渡段填料及形状对过渡段沉降影响较小,地基弹性模量是影响铁路路桥过渡段沉降的主要因素.
Abstract
Based on the subgrade project of Lankaonan Station section of Zhengzhou-Xuzhou High-speed Railway,the settlement monitoring of transition section is carried out to analyze the temporal and spatial distribution of the settlement of transition section in view of the problem that the transition section is prone to uneven settlement.The finite element model of ABAQUS was established and its validity was verified.Based on the finite element model,the effects of foundation elastic modulus,filler,shape on the settlement of railway road and bridge transition section were further analyzed.The results show that the settlement value of each monitoring point changes with time,and the settlement changes greatly in the early stage,and gradually tends to be stable in the operating period after track laying.The filling and shape of transition section have little influence on the settlement,and the elastic modulus of foundation is the main factors for the settlement of the railway road and bridge transition section.
关键词
路桥过渡段/沉降监测/数值模拟/沉降规律/地基处理/稳定性Key words
road and bridge transition section/settlement monitoring/numerical simulation/settlement law/foundation treatment/stability引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据