道床板结对宽轨枕轨道动力性能的影响  

Influence of Ballast Bed Hardening on Dynamic Performance of Broad Sleeper Track

作　　者：刘全仁 许良善 潘振 吉克 LIU Quanren;XU Liangshan;PAN Zhen;JI Ke(China Railway Taiyuan Group Co.Ltd.,Taiyuan 030013,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁路太原局集团有限公司,太原030013 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2021年第8期130-133,共4页Railway Engineering

基　　金：中国国家铁路集团公司科技研究开发计划(P2018X011);中国铁道科学研究院集团有限公司基金(2019YJ048)。

摘　　要：根据大秦(大同—秦皇岛)铁路隧道内宽轨枕轨道的道床刚度调研结果,利用移动加载车测试了路基和隧道区段宽轨枕轨道结构的轨道刚度;测试了大黑山隧道进口处宽轨枕轨道结构的运行稳定性参数、轨道部件受力、轨道横向变形、轨道振动加速度等动力学指标,并与铺设Ⅲ型枕的直线路基区段和半径为500 m的曲线路基区段进行对比。结果显示:大秦铁路隧道内宽轨枕轨道经30多年的服役后,道床脏污板结引起道床刚度及轨道刚度明显增加且离散不均,运行稳定性参数、轨道部件受力、轨道横向变形、轨道振动加速度均不同程度增加,宽轨枕轨道正常服役已受到影响。建议开展隧道内新型轨道结构的研究,为隧道内宽轨枕轨道结构的升级改造做好技术储备。According to the investigation results of ballast bed stiffness of broad sleeper track in Daqin(DatongQinhuangdao)railway tunnel,the track stiffness of broad sleeper track structure in subgrade and tunnel section was tested by mobile loading vehicle. The dynamic indexes of the broad sleeper track structure at the entrance of Daheishan tunnel,such as operation stability parameters,track component stress,track transverse deformation and track vibration acceleration,were tested and compared with those indexes of the straight subgrade section with type Ⅲ sleeper and the curve subgrade section with radius of 500 m. The results show that after more than 30 years of service of broad sleeper track in Daqin railway tunnel,the ballast bed stiffness and track stiffness are significantly increased and unevenly dispersed due to the dirt and hardening of ballast bed. The operation stability parameters,track component stress,track transverse deformation and track vibration acceleration have been increased in varying degrees,and the normal service of broad sleeper track has been affected. It is suggested to carry out the research on the new track structure in the tunnel,so as to make technical reserves for the upgrading and transformation of the broad sleeper track structure in the tunnel.

关 键 词：重载铁路 大秦铁路 道床刚度 宽轨枕 动力性能 道床板结 

分 类 号：U213.34[交通运输工程—道路与铁道工程]