青藏铁路格拉段铺设桥上无缝线路关键问题研究

结合青藏铁路格拉段桥上无缝线路设计问题，探讨了高寒、大温差地区铺设桥上无缝线路的关键问题．从提高线路允许温升、增大允许温降等方面入手，对合理确定锁定轨温及其容许范围进行了深入探讨，提出一些扩大桥上无缝线路铺设范围的具体保障措施。

Study of the key issues of laying CWR on bridge of Qinghai-tibet railway

Considering the problems of continuous welded rail （CWIK） design on the bridge in Geermu-Lasa section of the Qinghai-Tibet Railway,the article discussed the key issues of laying CW1K in the cold and large temperature difference region. Beginning from improving the line allowed temperature rise and increasing the line allowed temperature drop,it discussed how to reasonably determine the locked rail temperature and its allowable range,put forward some concrete safeguards to expand the range of laying CWR on bridge.