Abstract：Research purposes: The existing Line 2 and its east extension line of Shanghai metro is connected on the elevated bridge between Longyang Road and Zhangjiang Hi － Tech Region with big technical difficulty． This was the first for China to line and move the full track bed on the elevated bridge． Based on the successful completion of it，the introduction is given in this paper to the design idea and construction plan for lining and moving the full track bed for the purpose of providing the reference to the similar works．
Research conclusions: According to the project characteristics that the work occupation time was short，the precision requires high and it was the first time to do，the several design plans were made． The rail cap was poured between the existing rail and tie on the Beam 3，the short track caps were prefabricated in the beam manufacturing field for the beds on the 4 － 7 beams and the in － site welding was conducted for the welded rail track，with successful completion of the project． The project can be considered to explore the way of upgrading and maintaining the full track bed and can provide the reference to the similar works．
韩义涛. 上海地铁 2 号线东延伸接拨段轨道设计研究[J]. 铁道工程学报, 2011, 28(8): 91-95.
HAN Yi － tao. Research on Design of Track in East Extension Connection Section of Line 2 of Shanghai Metro. 铁道工程学报, 2011, 28(8): 91-95.
Liu Daotong，Yang Baofeng． Common Problems in Metro Track Construction and Their Solutions ［J］． Journal of Railway Engineering Society，2010 ( 4) : 97 － 100．
2011, Vol. 28 
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