华北地区CRTSⅡ型无砟轨道拱起特性研究  

Research on Arching Characteristics of CRTS II Ballastless Track in North China

作　　者：冯正飞 杨冀超 武建新 姚远 刘长安 郭江兵 FENG Zhengfei;YANG Jichao;WU Jianxin;YAO Yuan;LIU Chang’an;GUO Jiangbing(Beijing HSR Track Maintenance Depot,China Railway Beijing Group Co.,Ltd.,Beijing 100070,China)

机构地区：[1]中国铁路北京局集团有限公司北京高铁工务段,北京100070

出　　处：《中国铁路》2024年第9期180-186,共7页China Railway

基　　金：中国铁路北京局集团有限公司科技研究开发计划项目(2023CG09)。

摘　　要：受高温和设备劣化影响,高速铁路CRTSⅡ型板式无砟轨道拱起现象不断发生,严重影响线路平顺性。通过总结华北地区4条主要高速铁路目前轨道板拱起实际情况,对夏季拱起处所综合检测列车动态数据变化特性进行分析。研究结果表明,华北地区高速铁路6月份由于气温飙升轨道板拱起导致的动态变化处所急速增多,之后变化处所数量逐渐稳定。通过采取植筋、宽窄接缝凿除重新浇筑、注胶等预加固措施,拱起病害数量可得到一定控制。拱起病害处所历年高低峰值变化为“M”形变化趋势,且呈逐年增大趋势,轨道板拱起引起的轨道几何尺寸波形呈平滑的上凸尖状,存在单波和多波高低不平顺2种类型。因轨道板拱起引起的动态高低峰值和温度具有较强的关联性,动态高低变化对35~37℃的温度敏感性最高。通过对轨道板拱起处所动态变化特性进行分析总结,有利于精准监测拱起病害,及时指导现场采取加固措施,预防因轨道板拱起导致的线路不平顺。Affected by high temperature and equipment deterioration,the arching of high speed railway CRTS II slab ballastless track occurs continuously,which has a negative impact on the track regularity.By summarizing the actual conditions of track slab arching on 4 main high speed railways in North China,this paper analyzes the dynamic data change characteristics of comprehensive inspection trains at arching places in summer.The study results indicate that the number of dynamic change places caused by track slab arching on high speed railways in North China increased rapidly in June due to soaring temperatures,and then gradually stabilized.The number of arching defects can be controlled to a certain extent through pre-reinforcement measures such as embedding steel bars,chiseling wide and narrow joints for re-pouring,and injecting glue.The waveform of track geometry caused by track slab arching is smooth and convex,and there are two types of longitudinal level irregularity:single-wave and multi-wave.The dynamic longitudinal level peak value caused by track slab arching has a strong correlation with temperature,and the dynamic longitudinal level change is most sensitive to 35~37°C.By analyzing the dynamic change characteristics of track slab arching places,it is conducive to accurate monitoring of arching defects,timely guidance on taking reinforcement measures on site,and prevention of track irregularity caused by track slab arching.

关 键 词：高速铁路 CRTSⅡ型板式无砟轨道板 轨道板拱起 波形特征 温度关联分析 

分 类 号：U216.412[交通运输工程—道路与铁道工程]