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| Construction Technology for PC Chord － stayed Pole of Platform Canopy of Xi＇an North Station |
| NIU Zhen1，JI Jing － yuan1，WANG Li － yun2，LIU Ming － bao2 |
| 1． Beijing Construction Engineering Co． Ltd，China Railway Electrification Bureau Group，Beijing 100039，China; 2． Chinese Academy of Building Research，Beijing 100013，China |
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Abstract Research purposes: The platform canopy of Xi＇an North Station of Zhengzhou － Xi＇an Passenger Dedicated Line is composed of steel column，cantilever beam and chord － stayed pole． One end of the chord － stayed pole is connected with the steel column and the other end is connected with the canopy． The steel chord － stayed poles are arranged symmetrically on the two sides of the steel column with pre － stressing to form the self － equilibrating system for reducing the length of the canopy and controlling the shape － finding of the structure． According to the project characteristics，the various influence factors on the force of the chord － stayed pole during construction were analyzed，and by simulation analysis of the whole construction process，the important parameters of fitting length of the pole without stress and the tensioning force during construction were determined to control the whole construction process．
Research conclusions: From the analysis it is concluded ( 1) Before construction the simulation analysis of the whole tensioning process should be made to make sure the cable tensioning is in control． ( 2) The real － time and tracing monitoring should be conducted during construction． ( 3) The calculation result should be compared with the monitoring result to prove the validity of the simulation analysis with finite element and the feasibility of the construction plan．
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Received: 27 April 2012
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［1］ GB 50205—2001，钢结构工程施工质量脸收规范［S］．
GB 50205—2001，Steel Structure Engineering Construction Quality Face Received Standard［S］．
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Luo Bin， Guo Zhengxing， Qiu Ronggen． Zhejiang University Campus Gymnasium Steel Roof Mast Cable Network Construction Technology ［J ］． Construction Technology， 2010( 8) : 73 － 77．
［3］ 蒋顺武． 巨型网格结构施工全过程模拟分析［D］． 长沙;湖南大学， 2008．
Jiang Shunwu． The Giant Grid Structure Construction Process Simulation Analysis［D ］． Changsha: Hunan University， 2008．
［4］ 刘学武． 大型复杂钢结构施工力学分析及应用研究［D］． 北京: 清华大学， 2008．
Liu Xuewu． Large and Complex Steel Structure Construction Mechanics Analysis and Application［D］．Beijing : Tsinghua University， 2008
［5］ 王国梁，赵红玉，罗健，等． 济南车站无站台柱雨棚接触网悬挂安装方案必选［J］． 铁道工程学报， 2008( 2) : 77 －79．
Wang Guoliang， Zhao Hongyu， Luo Jian， etc．Comparison and Selection of Catenary Suspension Installed on the Platform Canopy without Post in Jinan Railway Station［J］． Journal of Railway Engineering Society， 2008( 2) : 77 － 79．
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2012, Vol. 29 
