我国铁路混凝土轨枕的现状和发展

目前,世界各国铁路混凝土轨枕铺设范围逐步扩大,大多数国家都发展预应力整体式轨枕。我国在高速铁路、客运专线和既有主要干线要求全部采用混凝土轨枕。其主要优点是纵、横向阻力大,提供足够的稳定性,轨枕承载能力可根据不同高速运行条件进行设计,寿命长和维修工作量小等。在高速铁路和客运专线的建设中,混凝土轨枕应采用国际标准。高速铁路明确了混凝土结构寿命应达到100年。高速铁路和客运专线轨枕标准在原材料选择、制造工艺、质量要求、检验方法等方面都要参照 EN 标准,充分考虑耐久性要求。应加强混凝土轨枕在基础理论和轨枕结构等方面的研究。

Present Condition and Development of China Railway Concrete Sleeper

Concrete sleeper is commanded to be used in China high speed railway,passenger dedicated line,and main existing lines. The advantages of concrete sleeper include large resistance in vertical and horizontal direction,good stability,carrying capacity designed according to different operation condition,longer life,and less maintenance.In the construction of high speed railway,considering endurance, concrete sleeper should refer to EN Criterion on aspects of raw material choosing,manufacturing technique,quality,and test method.At present,we shall make further research on concrete sleeper of China railway on basic theory and sleeper structure.