In order to meet the on-site testing requirements for longitudinal resistance of rails,a non-destructive testing method for longitudinal resistance of long rails with fasteners was proposed.A testing device was designed,and the testing process was provided.Two typical ballastless track lines were selected,the Harbin-Qiqihar high speed railway and the Datong-Xi'an high speed railway,and on-site tests on the longitudinal resistance of small resistance fastening rails on long-span continuous beams was conducted.This device adopts the method of fixed rail pulling fasteners,which has the advantages of lightweight structure,simple operation,high accuracy,and good stability.The on-site test results show that due to severe corrosion of the rails on site,the measured longitudinal resistance of the rails far exceeds the design value.Even if new stainless steel composite pads or other non-metallic material anti friction pads are replaced,the problem of excessive longitudinal resistance of the small resistance fasteners on site cannot be solved.
关键词
高速铁路/小阻力扣件/纵向阻力/复合垫板/锈蚀/现场测试
Key words
high speed railway/small resistance fastener/longitudinal resistance/composite plate/rust/on-site test
维普
万方数据