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| Research on Design of Track in East Extension Connection Section of Line 2 of Shanghai Metro |
| HAN Yi － tao |
| China Railway Eryuan Engineering Group Co Ltd，Chengdu，Sichuan 610031，China |
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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．
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Received: 01 June 2011
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［1］ GB 50157—2003，地铁设计规范［S］．
GB 50157—2003，Code for Design of Metro［S］．
［2］ TB 10082—2005，铁路轨道设计规范［S］．
TB 10082—2005，Code for Design of Railway Track ［S］．
［3］ 上海市市政设计总院． 上海市轨道交通 2 号线东延伸段工程施工图设计技术要求［Z］． 上海: 上海市市政设计总院，2007．
SMEDI． Design Technology Requirements for Shanghai Subway line 2 Extension Engineering［Z］． Shanghai: SMEDI ，2007．
［4］ 刘道通，杨宝峰． 地铁轨道施工常见问题及解决方案［J］．铁道工程学报，2010( 4) : 97 －100．
Liu Daotong，Yang Baofeng． Common Problems in Metro Track Construction and Their Solutions ［J］． Journal of Railway Engineering Society，2010 ( 4) : 97 － 100．
［5］ 于春华． 城轨交通整体道床病害及整治［J］． 铁道工程学报，2008( 12) : 83 －86．
Yu Chunhua． The Solid Track Bed Defect of Urban Mass Transit and Its Treatment［J］． Journal of Railway Engineering Society，2008( 12) : 83 － 86．
［6］ TB/T 2098—2007，无缝线路铺设及养护维修方法［S］．
TB /T 2098—2007，Method of Laying and Maintenance of Continuous Welded Railway Track［S］．
［7］ 铁运［2006］146 号，铁路线路维修规则［S］．
Railway Transporation ［2006］No． 146，Railway Line Maintenance Rules［S］．
［8］ 铁运［2006］177 号，铁路工务安全规则［S］．
Railway Transporation ［2006］No． 177，The Railway Maintenance Safety Rules［S］．
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2011, Vol. 28 
