摘要
高速铁路桥涵过渡段路基上拱造成无砟轨道高程异常,超出扣件调整范围,成为高速铁路运营维护的一大难题。为恢复上拱段无砟轨道结构的稳定性、平顺性和线路允许速度,开展了路基上拱整治技术研究,提出合理整治措施,并予以实施。通过安装分层自动监测系统和钻芯取样,分析上拱原因。采用切割、减薄支承层、注浆植筋、落道整治等措施解决了无砟轨道高程超限问题。并制定了防排水措施。上述探索初步给出了一套完善、切实可行的高速铁路无砟轨道区段路基上拱整治技术和方法。
Track geometric deterioration caused by subgrade heaving in the transition section between subgrade and bridge of high speed railway is beyond the scope of track precise adjustment,and becomes a major problem in operation and maintenance of high speed railway.In order to maintain the stability and ride comfort of ballastless track and reach to the line allowable speed, the study on treatment method of subgrade heaving was carried out,and the reasonable treatmen measures were put forward and implemented. By installing automatic monitoring system and drilling core sample of subgrade, the causes of subgrade heaving were analyzed. The track geometric deterioration was solved by cutting supporting layer,bonded rebars and track precise adjustment.The waterproof and drainage measures were developed also.The treatment method of subgrade heaving in ballastless track section is sound and practical.
作者
朱兴永
蔡德钩
戚志刚
陈峰
ZHU Xingyong;CAI Degou;QI Zhigang;CHEN Feng(Lanzhou Railway Bereau Group Co. Ltd. Lanzhou Gansu 730000 China;Railway Engineering Research Institute China Academy of Railway Sciences Beijing 100081 China)
出处
《铁道建筑》
北大核心
2018年第5期87-89,94,共4页
Railway Engineering
关键词
高速铁路
精调
现场试验
路基
支承层
High speed railway
Track precise adjustment
Field test
Subgrade
Supporting layer
