铁路有砟轨道起道合理参数分析

Analysis on Reasonable Parameters of Railway Ballast Track Lifting

针对铁路起道作业,基于经典弹性地基梁理论,建立有砟轨道线路两点起道计算模型,推导轨面位移微分方程。以四种常见有砟轨道结构为例,分析不同有砟轨道结构在不同起道量下离地长度变化规律,再根据轨面位移方程极值条件,得到两点起道轨面抬平应满足的条件,进而提出不同有砟轨道结构连续起道时合理起道间距,最后对不同有砟轨道结构起道力变化规律进行分析。所得结论可优化有砟轨道起道参数,指导工务维修作业。

For the track lifting operation of railway, based on the classical elastic foundation beam theory, the calculation model of two-point lifting of railway with ballast track is established, and the differential equation of track surface displacement is deduced. Taking four kinds of common ballast track structures as examples, the variation law of departure length of different ballast track structures under different lifting amounts is analyzed. According to track surface displacement extreme conditions of the equation, the conditions that the track surface of two-point lifting can be flattened are obtained. Then, the reasonable lifting spacing for continuous starting of different ballasted track structures is proposed. Finally, the variation law of lifting force of different ballast track structures is analyzed. The conclusion can optimize the track lifting parameters of ballast track and guide the track maintenance operation.