列车荷载对高速铁路路基沉降的影响

摘要

In order to research on the sub-grade deformation characteristics of train load under different speeds,this paper established finite difference model,referenced of irregularity management standards,with the exciting force function simulated the train load,using FLAC3D com-parative analyzed the sub-grade deformation characteristics under different speeds,the results showed that:the railway sub-grade dynamic settle-ment increased with the increase of train speed,the max subsidence area of train running to sub-grade in the center line of sub-grade surface.%为了研究在不同速度的列车荷载下路基的变形特征，建立了有限差分模型，参照不平顺管理标准，用激振力函数模拟列车荷载，运用FLAC3D对比分析了不同车速下的路基变形特征，结果表明：铁路路基动态沉降随着列车速度的提升而有所增大，列车运行时路基的最大沉降区域在路基表层的中心线处。