城轨交通新型轨道扣件研究与设计

研究目的:扣件是城轨交通工程轨道结构中的重要组成部件。目前国内应用于运营地铁地下线的一般减振扣件类型较多,近年来逐步发现存在着一些缺陷。为进一步优化适用于城轨交通60 kg/m钢轨地下线整体道床用的扣件,开展新型扣件的研制很有必要。研究结论:仿真计算分析、试制及室内试验结果表明,新型扣件具有较好的强度、耐久性、弹性及绝缘性能。优化弹条设计,加大了弹条尾部圆弧,增加与铁垫板的接触面积,提高弹条稳定性;减薄铁垫板、弹条插入孔改为长圆孔、优化锚固螺栓及轨距块等措施,使其结构、使用寿命、养护维修等方面较同类型扣件具有一定优越性。

The Research and Design of a New Type Fastening for Urban Rail Transit

Research purposes: Fastening is an important part of the track structure in urban rail transit system,which plays an important part in transmitting dynamic loads of trains and joining the rails and concretes together.At present,fastenings used for ordinary vibration damping section has been widely adopted on domestic existed underground lines,and they can mainly meet the operation requirements but it is gradually found that defects exist.Based on the operation experience and lessons over the years,the new type fastening is researched in order to optimize the fastenings used for underground line with monolithic track bed and 60 kg/m rail of urban rail transit. Research conclusions:The results of the simulation calculation,the trial-manufacture and the lab tests show the new fastening has the features of the good strength,durability,elasticity and insulating property.The end arc of the spring bar is enlarged by optimization of the design of the spring bar.The stability of the spring bar is improved by increasing the contact area between the spring bar and iron backing plate.By taking the measures of thinning the iron backing plate,changing the patch hole of the spring bar into long circle hole and optimization of the anchoring bolt and the gauge block,the new fastening is better than the similar fastening in the structure,service life and maintenance.