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| Research on Suspension and Fixed Modes of Catenary in Tunnel |
| TIAN Guang－hui，JUE Ming，CHEN Yong，LI Mo－ran，WANG Yan－zhe，LI Guo－zhen |
| China Railway Eryuan Engineering Group Co． Ltd，Chengdu，Sichuan 610031，China |
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Abstract Research purposes:There has been the argument about suspension and fixed modes of the catenary in tunnel since building high － speed railway． The analysis of the various properties of two fixed modes and selection of the rational suspension and fixed modes are the key points for design of the catenary of high － speed railway．
Research conclusions:In this paper，from the comparative analysis of two suspension and fixed modes of embedded spout and post － position anchor bolt from the areas of the load bearing situation，component properties，influence on tunnel，construction cost，construction methods，operation and maintenance，it is concluded: (1) The embedded spout has the advantages of the even load bearing，easy construction in later stage and reliable earthing，but with the high construction cost and the poor reservation accuracy of the pre － station construction．(2) The chemical anchor bolt has advantages of the no limitation of template，flexible positioning，controllable construction accuracy and low construction cost，but needing the additional earthing terminal with small adjustment allowance．(3) Based on the construction situation in China，it is recommended to give priority to using the suspension and fixed mode of post － position anchor bolt
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Received: 28 February 2012
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Qin Zhibin． Technology of Burying the Pre － buried Channel Flows at the Exit end of Dalingshan Tunnel ［J］． Shanxi Architecture，2010(18) :331－333．
［5］ 白金林，刘伟，朱海斌． 客运专线隧道接口施工管理与工程实践［J］． 铁道标准设计，2010(1) :200－204．
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Li Shujing． Construction Technologies for Secondary Lining of the Low Wall and Primary Filling of the Side Arch of Tunnel［J］． Journal of Railway Engineering Society，2009(5) : 80－83．
［7］ 万战胜，夏永旭，韩瑞昌． 化学锚栓的高温力学性能试验［J］． 长安大学学报( 自然科学版) ，2010(1) :63－66．
Wan Zhansheng， Xia Yongxu， Han Ruichang． Experimental Research on Mechanic Behavior under High Temperature of Chemistry Anchor Bolts ［J］． Journal of Chang' an University ( Natural Science Edition) ，2010(1) : 63－66．
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2012, Vol. 29 
