高速铁路无砟轨道监测技术

总结我国高速铁路无砟轨道结构形式,分析运营过程中可能存在无砟轨道上拱、梁端凸台或底座开裂、扣件失效、砂浆层离缝、轨道结构开裂、线下基础沉降等问题,提出采用电阻应变片式、振弦式、光纤光栅、电涡流非接触式、无线传输、远程监控、预警机制等测试和监控方法以及道岔区板式无砟轨道综合监测、桥上42号道岔区及临时端刺区受力和变形监测、隧道内CRTS I型减振型板式无砟轨道减振测试、CRTSⅡ型板式无砟轨道温度及变形监测等应用实例。并探讨采用高清摄像头图像识别、利用红外热成像、利用光纤的振动和声学传感等新技术在无砟轨道安全监控中应用。

Monitoring Technique for Ballastless Track of High-speed Railway

This paper Summarizes the ballastless tracks structures used in high-speed railway,analyzes the potential track defects during the service period,such as doming of the ballastless track,cracking of bollard block or track base,fastener failure,cracks between track slab and cement asphalt mortar cushion,track structure fractures,differential settlement of foundation. It proposes different advanced equipment and methods to monitor ballastless track structures by means of strain gauge sensor,hyun sensors,FBG sensors, eddy current non-contact sensor, wireless transmission equipment, remote monitoring system,early warning mechanism instruments and etc. it also Introduces application examples of monitoring and field test, integrated monitoring of ballastless track in turnout zone, stress and deformation monitoring of NO. 42 turnout on the bridge and end-spine zone,the test of damping CRTSI slab ballastless track in tunnel,temperature and deformation monitoring of CRTSⅡ slab ballastless track.Investigation is made of the application of high-definition camera image recognition,thermal imaging,optical fiber vibration sensor,acoustic sensors in the ballastless track safety monitoring.