结合西安地铁2号线的地裂缝特性、线路条件及轨道技术要求，通过方案比选，确定在地裂缝影响区域内的道岔区采用碎石道床并配置预应力混凝土岔枕的方案。采用有限元方法与传统计算方法对照进行岔枕的结构分析，针对地铁荷载、轨道结构高度及岔区设置条件等因素，合理确定岔枕的外形尺寸及钢筋配置。这一轨道结构已在西安地铁2号线成功运营使用超过1年，在国内地铁碎石道床道岔地段开始取代传统木岔枕结构。

Considering the ground cracks in the turnout zone of Xi’an metro Line 2, as well as line conditions and technical requirements of tracks, an option of ballast bed with prestressed concrete sleepers was determined through option comparison. In line with the subway load characteristics, height of rail structure and installation conditions and other factors, finite element method and conventional method were adopted to analyse the structure of turnout sleepers. Configuration and dimension of sleepers and their reinforcement were reasonably determined. This kind of track structure has been successfully used on Xi’an metro Line 2 over 1 year. On turnout with ballast bed wooden sleepers are replaced by prestressed concrete sleepers gradually in China.