岩土工程学报2023，Vol.45Issue(z2)：270-275,6.DOI:10.11779/CJGE2023S20043
高铁路堑段地面环境振动特性现场实测与数值分析
Field measurements and numerical analysis of ground vibrations generated by cutting
摘要
Abstract
A field measurement of ground vibration is performed on the Paris-Brussels high-speed railway,and the ground vibrations generated by cutting are analyzed.Based on the 2.5D finite element method(FEM),2.5D FE models for the cutting are established to investigate the effects of the design parameters for cutting on ground vibration responses.The results show that,in the near track zone,the amplitudes of ground vibrations are dominated by the axle weight of train,but are mainly influenced by the superimposed effects far away from the track which is induced by the adjacent wheelsets and bogies of middle cars.With the increasing distance from track,the ground vibrations decrease gradually,and the decay rate for the medium-and high-frequency vibrations is higher than that for others.The primary frequency of ground vibrations is dominated by the basic frequency of train loading f1.The process of ground vibration attenuation can be divided into three stages for the cutting track section.There are rebound phenomena of ground vibrations at the top of cutting slope.The ground vibration decreases with the increasing cutting depth.When the depth is beyond a critical value,such benefit of cutting on vibration reduction can hardly be increased further.In the precondition of the stability of cutting slopes,a larger inclined angle is beneficial to reducing vibrations.关键词
高速铁路/地面环境振动/路堑/现场实测/2.5维有限元法Key words
high-speed railway/ground vibration/cutting/field measurement/2.5D FEM分类
建筑与水利引用本文复制引用
毕俊伟,张继严,高广运,汪益敏..高铁路堑段地面环境振动特性现场实测与数值分析[J].岩土工程学报,2023,45(z2):270-275,6.基金项目
国家自然科学基金项目(42277130) （42277130）
广东省科技计划项目(2017A050501005) （2017A050501005）
