客运专线轨道结构选型分析

无砟轨道已成为我国客运专线轨道结构的基本形式,运用越来越广泛,轨道结构的选型显得尤其重要.基于沪昆客运专线,深入研究无砟轨道和有砟轨道的结构形式.首先结合地形、地质、地貌等特征,从施工性、维修性、经济性、适应性4个方面对轨道的选型展开论证,接着从经济性入手具体阐述轨道经济在轨道结构选型中的应用,最后对所选定的无砟轨道结构建立动力学模型,计算动力学指标,进一步验证所选定的无砟轨道结构的合理性.

Selection Analysis for Track Structure of Passenger Dedicated Line

Ballastless track has become the basic form of the track structure of passenger dedicated line in China. As it is more and more widely used, now the track structure selection seems particularly important. As a case study, Shanghai-Kunming passenger dedicated line is selected to conduct in-depth study on the ballastless and ballasted track structure. The author first expands the argument from the construction, maintenance, economy and adaptability combined with the charac- teristics of the topography, geology and geomorpbology, Then the track economy is specifically addressed in the selection of track structure. Finally, the author establishes a dynamics model of the selected ballastless track structure and calculates the dynamics indicators, further validates the rationality of the selected ballastless track structure.