高速铁路局部无砟轨道调整为有砟轨道可行性分析

Analysis of damage evolution and deformation of slab ballastless track under the effect of subgrade frost heaving-melting-settlement cycle

本文结合线路技术标准及病害工点的特点,从轨道、路基、隧道、信号、接触网等多个专业技术角度系统分析,对病害工点是否具备无砟轨道调整为有砟轨道的可行性进行详细分析论证。结果表明:各专业系统设计可满足无砟轨道换铺有砟轨道技术要求,但考虑到运营期间飞砟现象,建议本技术方案适用于设计速度不超过250km/h的线路;针对以上拱病害为主的线路,无砟轨道改为有砟轨道后,基础的持续性上拱易造成道床厚度不足,大上拱量条件下不宜采用。本文研究可为高速铁路无砟轨道养护维修提供理论参考。

Based on the technical standards of the line and the characteristics of the diseased work site,a detailed analysis and demonstration of the feasibility of adjusting the diseased work site from a ballastless track to a ballasted track was discussed from multiple professional technical perspectives such as track,subgrade,tunnel,signal,contact network,etc.The results show that the design of each professional system can meet the technical requirements of replacing ballastless track with ballasted track.However,considering the flying ballast phenomenon during operation,it is recommended that this technical solution is suitable for lines with a design speed of no more than 250km/h.Aimed at the upward arch disease mainly line,After the ballastless track is changed to the ballasted track,the continuous upward arch of the foundation is likely to cause insufficient thickness of the track bed,which is not suitable for large upward arch conditions.The study can be provided a theoretical reference for the maintenance and repair of ballastless track of high−speed railway.