成绵乐铁路无砟轨道结构设计与思考

The Design and Consideration of Ballastless Track Structure for Chengdu-Mianyang-Leshan Railway PDL

研究目的:高速铁路经过近几年的建设,无砟轨道设计与施工技术已相对成熟,但无砟轨道设计可结合现场施工情况不断进行优化。基于此,本文就成绵乐铁路无砟轨道的设计概况,从布板设计、桥上轨道结构设计、岔区轨道结构设计等方面介绍其设计细节及注意事项,并结合现场施工情况提出相关建议,以期为其他高速铁路无砟轨道设计和施工提供参考。研究结论:(1)桥上扣件选型依据充分,选型恰当,梁端及岔区无砟轨道结构设计合理,梁缝处扣件间距控制措施可行;(2)无砟轨道设计应注重系统工程的整体性和衔接性,做好细节设计与接口设计,加强防排水设计;(3)无砟轨道施工应从细节控制上体现设计理念,从原材料控制、过程控制、质量控制等方面确保轨道结构的施工质量;(4)该研究成果可应用于高速铁路无砟轨道设计中。

Research purposes： With the construction of high - speed railway in recent years, the technology of design and construction for ballastless track is relatively mature. But the design of hallastless track can be optimized combined with the construction of site. Based on this, this paper introduced the design survey of ballastless track structure for Chengdu - Mianyang - Leshan Railway, and introduced design details for the layout of slab, the design of track structure on bridge and turnout structure and so on. And combined with the construction of site, this paper put forward relevant suggestions, which provide the references for design and construction for other ballastless track of high - speed railway. Research conclusions： （ 1 ） The selection of fasteners on bridge based on sufficient argument is correct, the design of ballastless track for beam ends and turnout is reasonable, and the measure to control the fastener space across the beam joint is feasible. （2） During the design of ballastless track, we should pay attention to the integrity and cohesion of the track system engineering, more to the details and interfaces and to strengthen the design of waterproof track. （3） The ballasted track construction should control details in order to reflect the design concept, and ensure the construction quality of the track structure from the control of the raw material, process and quality. （4） The research results can be applied in the design of ballastless track for high speed railway.