无砟轨道沉降偏移的抬升及纠偏技术研究

Research on the Lifting and Correction Technology of Settlement and Deviation of Ballastless Track

轨道沉降会导致列车运行不稳定,进而影响行车安全。为此,基于赣深高铁K2151+806~K2151+850段无砟轨道沉段偏移下问题开展了研究,对沉降无砟轨道采用高聚物注浆抬升技术进行抬升,对偏移无砟轨道采用“气垫顶升+机械横向顶推”整体纠偏技术进行纠偏。提出了一套完备的轨道抬升施工工艺流程及有效的轨道纠偏方法,并通过钻孔取芯以及分析轨道整治前后线形对轨道抬升及纠偏技术效果进行验证。结果表明:无砟轨道沉降注浆抬升技术起到了加固路基土体的效果,且纠偏及抬升后的无砟轨道线路平顺性得到了明显改善。本研究成果不但能为类似工程项目病害处治提供经验,同时也能为铁路工程领域的设计、施工和监测加固提供指导。

Track settlement can lead to unstable train operation,thereby affecting train safety.Therefore,this paper conducts research on the problem of settlement and deviation of ballastless tracks in the K2151+806~K2151+850 section of the Ganzhou⁃Shenzhen High⁃speed Railway,and proposes a complete set of track lifting construction process and effective track rectification method of using polymer grouting lifting technology to lift the settled ballastless tracks,and using“air cushion lifting+mechanical lateral pushing”overall rectification technology to correct the deviation of the deviated ballastless tracks.The effect of track lifting and rectification technology is verified through drilling cores and analyzing the linearity before and after track rectification.The results show that the settlement grouting lifting technology for ballastless track has played a role in strengthening the roadbed soil,and the smoothness of the ballastless track after correction and lifting has been significantly improved.This study can not only provide experience for the treatment of diseases in similar engineering projects,but also provide guidance for the design,construction,and monitoring reinforcement of railway engineering.