摘要:研究目的:扣件系统是无砟轨道的关键部件之一，为指导严寒地区高速铁路无砟轨道扣件系统选型，本 文结合严寒地区高速铁路的工程特点，分析严寒地区无砟轨道对扣件系统的需求，并通过介绍国内外无砟轨 道扣件系统的应用情况，从扣件系统的技术特点及严寒地区适应性等方面进行对比分析，从而提出扣件系统 选型建议。研究结论:(1)严寒地区高速铁路无砟轨道扣件系统选型应从几何形位保持能力、纵向阻力、养护维修、 弹性垫层刚度、绝缘性能、几何形位调整能力、极端温度适应性等方面综合考虑；（2)有螺栓式紧固的扣件系 统调整能力强，且扣压力衰减后可恢复；（3)不分开式扣件系统的零部件较少，易于养护维修;（4)有挡肩扣件 的承载能力较强，所有扣件系统均需研究复合材料部件的低温性能和弹条的低温疲劳性能；（5)本研究结论 可为严寒地区高速铁路无砟轨道扣件系统的选型提供参考。

Abstract:Research purposes: Fastening system is one of tlie key components in bElastless track，in order to guide the fastening system selection of high - speed railway ballastless track in cold area，the requirements of tlie fastening system of ballastless track in cold area were analyzed combined with the engineering characteristics. The application of ballastless track fastening system at home and abroad was introduced， and the comparative analysis of technical characteristics and adaptability in cold area of fastening system were carried，and recommendations for fastening system selection were proposed. Research conclusions:( 1 ) The ability of geometry keeping and adjusting， longitudinal resistance，maintenance， the stiffness of elastic cushion， insulation performance and extreme temperature adaptability should be taken into account when selecting the fastening system of baiastless track in cold area. (2) Fastening system with bolt has strong adjusting ability and the clamping force could recover. (3 ) The nonseparated fastening system has less components and is easy to maintain. (4) The fastening system with shoulder has strong bearing capacity. The low temperature performance of composite material and the low temperature fatigue properties of clip) in fastening system should be researched. (5) This paper could provide the basis for the fastening system selection of high - speed railway baiastless track in cold area.