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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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．
2012, Vol. 29 
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